WG-FSA-12

This report presents the results of a method used to explore potential explanatory variables influencing finfish bycatch in the krill fishery of Area 48. Records of finfish bycatch in the Area 48 krill fishery collected by observers on the FV Saga Sea were analysed over the period 2007/08-2011/12. The majority of fish caught were either small juveniles or larvae, dominated by Myctophidae ( Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The report presents a methodology that can be used to estimate the total finfish bycatch of the Area 48 krill fishery and quantify the impact of bycatch on the finfish stocks using data that is currently available, applied to data collected by Scientific Observers on the FV Saga Sea.

Estimates of bycatch rates per tonne of catch were made at a family level for Channichthyidae, Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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A balanced ecosystem model is used to explore the system-level characteristics of the food-web of the Ross Sea shelf and slope before the advent of commercial fishing for Antarctic toothfish (Dissostichus mawsoni) in the region. We evaluate: (1) biomass and flow of organic matter by trophic level; (2) mixed trophic impact; and (3) ecological importance. Note that the analysis Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Macroscopic data of the field research obtained during fishing trips on board Spanish longliner "Tronio" in 2007-2011 were given. Gonadosomatic indices (GSI) of 823 Antarctic toothfish individuals from various SSRU in the Ross Sea were calculated. For one specimen with maximum observed weight of gonads (15.5 kg, GSI – 23.85 %), the individual absolute fecundity (IAF) and relative fecundity (RF Read More
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Admin Admin (Secretaría de la CCRVMA)

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The present paper presents the brief results of the research in reproductive biology of the Antarctic greinadier M. whitsoni in the Ross Sea. It was stated that the eggs were released by batches. It was supposed that the similar character of spawning might be for some other Antarctic fish species. Some peculiar features of the reproductive biology Moray cod M. evseenkoi, Read More
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Admin Admin (Secretaría de la CCRVMA)

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Results of comparative histological analysis of gonads of female and male Antarctic toothfish Dissostichus mawsoni caught by Russian longliners in the Ross Ross Sea of the Pacific sector in 2004/2005 - 2006/2007 seasons are presented. Morphological indices of females and males, age, indices of gonads, fecundity, and condition by Fulton are described. The criteria of assessment of Read More
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Admin Admin (Secretaría de la CCRVMA)

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In this study, otolith microstructure analysis on 7 blue phase fingerlings and 26 brown phase fingerlings selected from a total sample of 364 early juveniles caught mainly in summer from 2003 to 2010 at Potter Cove, South Shetland Islands, allowed to provide insights on early life history timings and to validate annulus formation. Although in the literature it has been reported that N. Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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This document analyses and relates long term information on population trends of inshore demersal fish and Antarctic shags of the South Shetland Islands. The analysis is complemented with comparable information on diet, foraging patterns and breeding output of shags from the Danco Coast, western Antarctic Peninsula, an area that has remained out of the influence of the commercial fishery. Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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During fishing trip of F/V «Jung Woo 3» (Republic of Korea) in the Ross Sea over 29 species were found in the stomachs of the Antarctic toothfish. The main forage organisms for the toothfish were Macrourus whitsoni, fish of the family Channichthyidae, mainly Chionobathyscus dewitti, and squid, including Psychroteuthis glacialis. Fish of the family Nototheniidae, Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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This paper presents an analysis prepared by the  Secretariat and Korea to provide the context to the more variable and anomalously high CPUEs of the two Korean ships the Insung No. 2 and the Insung No. 7 while participating in CCAMLR exploratory fisheries. The operational characteristics of these ships showed distinct differences to the other ships that have participated Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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This paper summarises fishery-related scientific research notified under Conservation Measure 24-01 for 2011/12 and 2012/13.

A stock assessment of the Patagonian toothfish (Dissostichus eleginoides) at Kerguelen Islands (CCAMLR Division 58.5.1) was undertaken using the modelling software CASAL, based on different statistical and biological datasets: abundance estimation from the POKER 1 (2006) and 2 (2010) surveys, standardized CPUE of commercial fisheries, tag releases and recoveries by length bin,  Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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A bottom trawl survey for demersal finfish was undertaken by Germany aboard R/V ‘Polarstern’ around Elephant Island, the South Shetland Islands and at the tip of the Antarctic Peninsula from 17 March to 5 April 2012. In this paper we provide information on species composition, biomass, and size composition of the abundant fish species encountered during the survey. Catches in the Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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This paper has been provided by the Secretariat to assist WG-FSA and the Scientific Committee to give additional consideration, at their 2012 meetings, to methods to estimate trends in IUU fishing and estimates of IUU catches, including further consideration of the recommendations of JAG.  The paper includes:

1. consideration of patterns and activities associated with IUU Read More
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   Sarah Mackey (Secretaría de la CCRVMA)
   
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Closed mostly within the Weddell Sea Subarea 48.5 is one of the closed data-poor CCAMLR subareas, where stock assessment should be carried out. In spite of hard ice conditions during most of the time of the year, this large water area is very similar with the Ross Sea. This similarity, which could be found in geographical location, bathymetric profile and current system, highlight the Weddell Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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In 2011 and 2012 in Subarea 88.3 research fishing for toothfish has been conducted by Russia. In 2011 fishing was carried out by Russian longliner “Sparta” out and in 2012 it was longliner “Chio Maru 3”. Research program was performed by scientific observers from VNIRO (Moscow, Russia) and YugNIRO (Kerch, Ukraine). Totally, during the work period 44 longlines were set at a depth from 625 to Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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The present work includes results of seven-year own author’s research and presents generalised knowledge about distribution and biology of the antarctic toothfish in different sectors of the Antarctica.

In accordance with decision of CCAMLR Scientific Committee in 2010 and in 2011 years Russian Federation was conducted research program in SSRU 88.2 A. In seasons 2010/2011 and 2011/2012 Russian vessel “Chio Maru 3” (“Antei” Ltd.) has been conducted research fishing of toothfish. The primary objective of the works in the SSRU was estimation of toothfish`s distribution density and carrying out Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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In 2010, POKER Biomass survey was undertaken at Kerguelen Islands (Division 58.5.1) to collect information of all the fish species including the mackerel icefish, Champsocephalus gunnari. Data from this random stratified trawl survey, added to the previous results of 2006, was used for a short term assessment of C. gunnari on Kerguelen EEZ. The standard CCAMLR methods were Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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The analysis of the data on size composition of Antarctic toothfish (Dissostichus mawsoni) from catches in different statistical areas of the Ross Sea was given. Biological data for two fishery periods were selected for comparison: 2003-2005 and 2008-2012. It allowed estimating changes in the size composition of the fished part of Antarctic toothfish population. It was noted that Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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By way of simulation, this study investigated how the bias and precision of biomass estimates from an integrated tag-based assessment are influenced by various aspects of a multi-year tagging program, in particular the effects of the size (tag size-overlap) and numbers of tagged fish, the duration of the tagging program, the type of auxiliary data used in the assessment, and the catch history Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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The marbled notothenia (Notothenia rossii) was the first species targeted by commercial fishing in the Southern Ocean. The species has been heavily fished around South Georgia and Iles Kerguelen in the first half of the 1970’s and at Elephant Island in 1979/80. The closure of the fishery for this species was one of the first conservation measures the ‘Commission for the Conservation Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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Commercial exploitation of fish stocks around Elephant Island and the lower South Shetland Islands ceased after the 1989/90 season. One of the larger and most abundant species in the area, Gobionotothen gibberifons, was only lightly exploited compared to more northerly fishing grounds such as South Georgia. Six surveys were conducted by the US and Germany from 1998 to 2012 to Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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Population-genetic structure of Antarctic toothfish (Dissostichus mawsoni) was investigated not once during the last decade and before, but in this work we present our data on DNA-analysis of recent samplings of toothfish from CCAMLR Subareas – 88.1, 58.4.1, 58.4.2 and 48.6. Our findings show difference with publishes data for several genes and present new view onto toothfish Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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This work is prepared in accordance with recommendation of 4.18 WG-SAM-12 about submitting of data on fishing gears` construction that was used on Russian longliners Sparta” and “Chio Maru №3”. The trotline of a special design that was used is formed of main floating line and fastened lines with hooks and weight. This design allows avoiding fish injuries outside the mouth cavity and Read More
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Ms Doro Forck (Secretaría de la CCRVMA)

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Ocean circulation has been identified as a major process controlling the distribution of biological material in marine systems.  Large-scale transport by the Antarctic Circumpolar Current (ACC), the Ross and Weddell Gyres, and the Antarctic Coastal Current can promote spatially complex population structure in the Southern Ocean through advection.  Antarctic silverfish ( Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The unicorn icefish, Channichthys rhinoceratus and the grey rock cod, Lepidonotothen squamifrons are among the most common species bycaught in the toothfish and mackerel icefish trawl fisheries at Heard Island and McDonald Islands (HIMI) (Division 58.5.2). These species are rarely taken in the longline fishery, but form the most abundant bycatch of the trawl fisheries after Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The annual random stratified trawl survey at HIMI was completed in March to May of 2012. A codend liner, usually in place for the entire survey, was used only in the icefish strata, Gunnari Ridge, Plateau Southeast and Plateau West, and in a repeat of the hauls in Ground B. Catches in this RSTS were generally high in comparison with previous years, with the total fish catch being twice as high Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the vicinity of Heard Island during April-May 2011. This paper provides a preliminary assessment of mackerel icefish population structure, abundance and yield for the area of Division 58.5.2 to the west of 79^o 20’ E using standard CCAMLR methods. A pattern of 5 year classes being present simultaneously in Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The Commission aims to protect vulnerable marine ecosystems (VMEs) and has established several Conservation Measures that limit bottom fishing and require data collection by fishing vessels.  Members have made substantive and important scientific contributions to support the Commission’s objective of protecting VMEs, but work comparing the effects of different gear types has been Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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France presented at the CCAMLR XXVIIth meeting, an action plan aiming to reduce incidental seabird mortality by half in the French EEZ included in the statistic division and subarea 58.5.1 and 58.6, for the period 2008/2009 to 2011/2012.

France demonstrated at the CCAMLR XXXth meeting, to have successfully fulfilled its commitments and to have obtained encouraging results concerning the Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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In 2011/2012, a French vessel conducted its first exploratory fishing campaign in division 58.4.3a. In order to achieve a robust stock assessment that would provide advice on catch limits according to CCAMLR decision rules, it is suggested to continue the research program for the next three years. This paper is a revised proposal of WG-SAM-12/14 encouraged by 2012 SAM working group for a Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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This paper presents a revised plan for research fishing by the Koryo Maru 11 for the 2012/13 fishing season, and revises and replaces WG-SAM-12/21.  The proposed research fishing is limited to Statistical Subarea 48.6.  Preliminary assessments of Dissostichus spp. stocks in Subarea 48.6 north of 60°S (SSRUs 48.6A and 48.6G) and south of 60°S (SSRUs 48.6B, 48.6C, 48. Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Available catch, effort, catch-at-size and tagging data for Statistical Subarea 48.6 are analysed to provide preliminary assessments for Dissostichus mawsoni and D. eleginoides separately in Subarea 48.6 north of 60°S (the combined SSRUs 48.6A and 48.6G). A preliminary assessment for D. mawsoni in Subarea 48.6 south of 60°S (the combined SSRUs 48.6B through 48.6E) is Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Results of histological analysis of gonads of female and male Antarctic toothfish Dissostichus mawsoni caught in the Bellingshausen Sea in 2011- 2012 seasons are presented. Morphological indices of females and males, age, indices of gonads, fecundity, and condition by Fulton are described. In the Bellingshausen Sea the Antarctic toothfish had deferred reproductive ability compared Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Data from a seven-year (2002-2008) ichthyoplankton sampling programme in Cumberland Bay, South Georgia, sub-Antarctic (54.25^oS, 36.5^oW) were analysed to assess temporal changes in larval fish diversity and abundance. Larvae of twenty two species, representing nine families, were identified although three, Krefftichthys anderssoni (Myctophidae), Lepidonotothen Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Lepidonotothen squamifrons (Family Nototheniidae) is a demersal Southern Ocean endemic fish. Historically a commercially targeted species and common as bycatch, changes to CCAMLR fisheries regulations in 1989 have meant it is now only caught in sub-area 48.3 during research surveys. Data collected during groundfish surveys at South Georgia and Shag Rocks from 1986 to 2012 were Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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• Genetic identification of grenadiers taken as bycatch in the toothfish longline fishery at South Georgia was compared with results of morphological identifications made by scientific observers and fisheries biologists.
• There was generally good agreement between methods although issues exist in the ability to morphologically distinguish between M. carinatus and Read More
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  Sarah Mackey (Secretaría de la CCRVMA)
  
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This paper presents an update of the assessment of toothfish (Dissostichus spp.) in Subarea 48.4. The Subarea is divided into two management regions and assessed using a CASAL assessment of D. eleginoides in the northern region and a simple Petersen biomass estimate derived for D. eleginoides and D. mawsoni in the southern region. The CASAL model structure Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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A reduced (three day) groundfish survey took place at Shag Rocks on the FV New Polar between the 26-28th January 2012. This survey was not intended to be a full biomass survey so only 20 random hauls were completed around Shag Rocks with 3 additional opportunistic sites at South Georgia. Reasonable catches of Patagonian toothfish were found around Shag Rocks (greater than in 2009 and Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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We analysed the available data from vessel and scientific observer logbooks from the exploratory fishery for Antarctic toothfish (Dissostichus mawsoni) and Patagonian toothfish (D. eleginoides) in CCAMLR subarea 48.6 (South East Atlantic). This report summarises the catch, effort, timing, depth, location, size structure and maturity of Dissostichus spp.  Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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In the Division 58.4.1 there are two stocks; one extends from the SSRU 58.4.1C to the SSRU 58.4.2A, and the other one to the SSRU 58.4.1H. The population sizes were vulnerable with a big range of about 1000-2000 t per SSRU in 58.4.1 and 100-1500 t per SSRU in 58.4.2. During the 2003-2007 fishing seasons, 3,434 toothfishes were tagged and released, but only 5 fishes among them have been Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The longline fisheries for Antarctic toothfish (Dissostichus mawsoni) in subareas 88.1 and 88.2 have provided more than a decade of observations to aid in understanding the life history and ecology of toothfish. Updated spawning ogives for males and females support the currently used values. Using histological samples, a summer GSI threshold of 1% appears to be a good indicator of Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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At its 2011 meeting, the Scientific Committee agreed that a time series of relative recruitments from a well-designed survey could be a useful input into the Ross Sea stock assessment model and endorsed a proposal to carry out this work once the fishery had closed at the end of the 2011/12 season. The survey had two main objectives: (i) To establish the feasibility of developing a time series Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The exploratory fishery for Dissostichus spp. has now been operating for 16 years in Subarea 88.1 and for 10 years in Subarea 88.2. This report summarises the timing, depth, and location of fishing together with the catch of Dissostichus spp. and bycatch species by year for the period 1997–98 to 2011–12. During the 2011–12 fishing year most of the catch in Subarea 88.1 came Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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An age determination manual for Antarctic toothfish (Dissostichus mawsoni) was produced for CCAMLR in 2010. The manual has been updated to include the development and use of a reference set to provide training and refresher material for agers, and to formally track reader performance and reader drift. In addition, standardized analysis and data reporting are recommended to allow the Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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We present developments towards spatially explicit age-structured population dynamics operating models for Antarctic toothfish in the Ross Sea. The operating models consider both a coarse-scale and medium-scale spatial resolution and consider scenarios where abundance can be present over the entire Ross Sea region or restricted to areas where the fishery has operated.



The Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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We present a method to evaluate potential biases and uncertainty in the tagging assumptions of the stock assessment for Antarctic toothfish in the Ross Sea region using spatially explicit operating models. The method allows investigation of potential biases and uncertainty in the assumptions of spatial distribution and fish mixing used in the standard stock assessments for the Ross Sea region Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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SPM (Spatial Population Model) is a generalised spatially explicit age-structured population dynamics and movement model. SPM can model population dynamics and movement parameters for an age-structured population using a range of observations, including tagging, relative abundance, and age frequency data. SPM implements an age-structured population within an arbitrary shaped spatial structure Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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A reliable commercial tagging program is critical to the successful management by CCAMLR of a number of toothfish fisheries in Antarctica, but the evaluation of tagging performance has been thus far inconclusive because the confounding effect of factors such as time and location of tagging, and size of fish tagged, makes meaningful comparisons between vessels difficult.



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Sarah Mackey (Secretaría de la CCRVMA)

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Antarctic toothfish (Dissostichus mawsoni) have a circumpolar distribution, and have been found associated with bathymetric features shallower than 2250 m and typically deeper than 500 m from the Antarctic continent north to approximately 57° S. Efforts to understand early life history and stock structure in the Ross Sea have parallels for populations in other regions of the Antarctic, and Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Conservation Measure 41-01\Annex C requires participants in exploratory fisheries to only tag fish with a high probability of survival. Further it recommends that fish hooked only in the mouth should be tagged. A new data collection form was implemented in 2012 to allow evaluation of fish suitability for tagging from research hauls in exploratory fisheries in Subarea 58.4 and 48.6. We Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Muraenolepis species are caught in low numbers with bottom longline and trawl gears throughout the CCAMLR Convention Area. There are seven known species in the genus, but more work on the taxonomy of the group is needed and the number of species is uncertain. The few biological studies published suggest a relatively fast growing, semelparous, life history with a maximum age of 11 Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Reliable estimates of demersal fish community composition and population densities are essential for understanding the ecological effects of fisheries. Such estimates are conventionally derived from research trawl surveys but video techniques afford an alternative, or complementary, approach. Using data collected during a survey of demersal fish communities in the Ross Sea region of Antarctica Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The diet of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region was examined based on stomach samples obtained from observers on New Zealand fishing vessels in 2003 and 2010. Overall, the diet of sub-adult toothfish was similar to that of adult toothfish, with a dominance of piscivory on benthic fishes and cephalopods, augmented by benthic invertebrates. Sub-adult Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Two size classes of A. georgiana have been described in by-catch fishing data reported in the catch data from the Ross Sea fisheries. We extracted DNA from A. georgiana samples from both size classes collected by Scientific Observers in the Ross Sea. We determined the DNA sequences of five mitochondrial DNA (mtDNA) gene sequences and tested whether the two size classes Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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We present the first differentiated information on the biology and ecological niche of Macrourus whitsoni and M. caml in the Ross Sea region of the Southern Ocean. Fish were caught by New Zealand vessels in the fishery for Antarctic toothfish (Dissostichus mawsoni) between December 2011 and February 2012 from CCAMLR subareas 88.1B, 88.1C, 88.1G, 88.1H, 88.1K and 88. Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Updated software is presented for the automated production of standardised image plots of spatially referenced bottom fishing impact assessments. This software is submitted to WG-FSA as an R library to assist the Secretariat or CCAMLR Working Groups in the production of integrated bottom fishing impact assessments, including routine update of the circumpolar impact assessment originally Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Research-based New and Exploited fisheries have been conducted in order to collect information for the stock status and biology of toothfish in the Division 58.4.3b (Banzare Bank), using a Japanese commercial longline vessel Shinsei maru No. 3, during 2006/07 and 2011/12. Total number of hauls ranged from 22 to 148 during the six cruises. Total catch of Dissostichus spp. Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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A survey was conducted in order to collect information for the stock status and various biological information on toothfish in SSRU B and C of Division 58.4.4a & b (Ob Lena Banks) from April 15 to May 19, 2012. Total catch (excluding tagged and released fish) of Dissostichus eleginoides was 28.3 tonnes in the survey area in 70 longline sets. Mean CPUEs of D. eleginoides Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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A tagging survey in SSRUs B and C in Division 58.4.4 a & b was conducted in the 2011/12 fishing season with the aims of providing the data required for assessments of the population structure, size, movement and growth of Dissostichus spp. in the centred area of Division 58.4.4 a & b. An approximate stock biomass level of Dissostichus spp. in the survey area was Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Following the advice from the CCAMLR Working Group in WG-SAM in 2012, a preliminary assessment of stock status of D. eleginoides in SSRU C in Ob-Lena Banks was made using a CASAL catch-at-length model. In this preliminary assessment, the model was started in 1990 and catch, proportions at length in the catch, and recapture data from SSRU C from 2007/08 to 2011/12 were fitted in the Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The research fishing proposal for Dissostichus spp. in Subarea 48.6 and Divisions 58.4.1, 58.4.2 and 58.4.3a is resubmitted following paragraph 3.24 of WG-SAM-12. In the present proposal, we firstly showed information of catch, efforts, tagging experimental results based on the CCAMLR C2 data, and secondly showed the results of biological features with some discussion of life history Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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To infer important prey resources for Antarctic toothfish (Dissostichus mawsoni) in the south of SSRUs 881.J and 881.L in the southern Ross Sea, their lipid composition was determined and compared tolipid profiles of fish and invertebrate species taken as bycatch in the fishery or collected from stomachs of toothfish. Stable carbon and nitrogen isotope ratios were also determined to Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Since its inception in 1992 the CCAMLR Scheme of International Scientific Observation  the complexity of documenting procedures, variety of sampling requirements and associated data management have all increased. Given  the likely continued increase in complexity it is essential to have processes in place to review, revise and adapt existing procedures to ensure that the scheme Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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In 2012 data on beach surveys, debris associated with seabird colonies, marine mammal entanglements and hydrocarbon soilings were received from South Africa, the United Kingdom, and Uruguay.  Non-fishing items such as plastics, packaging materials and wood remain the most common type of debris items found in beach surveys.  The fishing items found were mostly from longline and trawl Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The development of methods to estimate unaccounted fishing mortality from lost fishing lines requires an estimate of the number of lost hooks that are attached to sections of line. In 2011 hook loss data was provided by 21 of the 34 vessel/fishery reports with an estimated 317920 hooks lost attached to sections of lines.  In 2012 15 of the 26 vessel/fishery reports provided non-zero data Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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This paper summarises the data collected by National and International Scientific Observers operating in the Convention Area on board longline and trawl fishing vessels during the 2011/12 season.  Only data processed by the Secretariat up until 21 September 2012 has been used in this paper, covering longline observations in Subarea 48.4, 48.6 and Area 88, and trawl observations in Area 48 Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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We studied the annual distribution, activity and breeding foraging trips of the sibling species of giant petrels, Northern Giant Petrel Macronectes halli and Southern Giant Petrel Macronectes giganteus from the  Crozet Islands (46°25'S; 51°51'E) where the 2 species breed sympatrically and Kerguelen Island (49°19'S; 69°15'E where Northern Giant petrels breed). Distribution and Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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The material obtained between 1986 and 1991 has allowed to study the pattern of geographical and depth distribution of Pseudochaenichthys georgianus in the area of Scotia Arc Islands and on shelf of South Georgia Island. In the Antarctic colder waters in the Palmer Archipelago there were mostly young, small fishes. They have stomach filled well with krill so swim probably to match Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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A revision of the research plan for the Spanish exploratory longline fishery for Dissostichus spp in Divisions 58.4.1 and 58.4.2, submitted to the XXXI-WG-SAM, taking into account the suggestions made by the Working Group is presented. Two methods to estimate the local biomass of the toothfish are proposed, a depletion experiment together with the tag of some specimens using the Read More
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Sarah Mackey (Secretaría de la CCRVMA)

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Following seals and baleen whales prior to the 1970s, demersal fish stocks were depleted off the South Shetland Islands by intensive industrial fishing during the late 1970s to early 1980s. Little has been reported since about how these stocks have fared, after international agreement closed this fishery in 1990. We report changes in size and abundance of the commercially exploited Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
Fisheries Research, 125–126 (2012): 206–213

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A multi-disciplinary approach incorporating otolith chemistry, age data and numerical Lagrangian particle simulations indicated a single, self-recruiting population of Antarctic toothfish (Dissostichus mawsoni) in the Southeast Pacific Basin (SPB) and Ross Sea, with a life history structured by the large-scale circulation. Chemistry deposited prior to capture along otolith edges Read More
Presentado por:
Ms Doro Forck (Secretaría de la CCRVMA)

Publicación:
(Can. J. Fish. Aquat. Sci., in press)

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Foraging events and related trends in numbers of Type-B and -C killer whales (Orcinus orca) are reported for the vicinity of Ross Island, Ross Sea, Antarctica, between 2002 and 2010. Updating an earlier report, the frequency of sightings and the number of individuals per sighting of Ross Sea killer whales (Type-C; RSKWs), a fishing-eating ecotype, has continued to decrease in a Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(Aquatic Mammals, 38 (2) (2012): 153–160, doi 10.1578/AM.38.2.2012.153)

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We report the analyses of a dataset spanning 39 years of near-annual fishing for Dissostichus mawsoni in McMurdo Sound, Antarctica, 1972–2011. Data on total length, condition and catch per unit effort (CPUE) were derived from the > 5500 fish caught, the large majority of which were measured, tagged and released. Contrary to expectation, the length frequency of the McMurdo Sound catch was Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(Fish and Fisheries (2012), doi: 10.1111/j.1467-2979.2012.00474.x)

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The current management strategy of the Ross Sea Antarctic toothfish fishery in an MSY mode is to target the oldest, largest, most fecund fish, theoretically to increase the number and growth rate of smaller fish. The literature is reviewed to reveal why this strategy has failed in the past for fisheries taking long-lived, late maturing benthic fish. Not only have there been ecological effects Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
In: Huettmann, F. (Ed.). 2012. Protection of the Three Poles, Chapter 3. Springer Verlag. doi: 10.1007/978-4-431-54006-9_3)

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Information about fish species composition from region near the Ukrainian Antarctic Station «Akademik Vernadsky» (Argentine Islands, Antarctic Peninsula) during wintering 2007-2008 is presented. The quantitative indexes of different species fishes and the analysis of their dominant groups were studied. New fishes subdominant was registry with help our researches. Trematomus bernacchii was Read More
Presentado por:
Ms Doro Forck (Secretaría de la CCRVMA)

Publicación:
(Ukraininan Antarctic Journal, 9 (2010))

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Between 2010 and 2012, AAD, Australian Fisheries Management Authority and Australian fishing industry provided funds to conduct high throughput ageing of toothfish otoliths. 5780 otoliths, collected during the 2000-2011 fishing seasons in Division 58.5.2 and outside the CCAMLR area at Macquarie Island were processed. The inclusion of these datasets have improved the estimates of key parameters Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(Final Report, AFMA Project 2009/839 (2012))

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In 2011, AAD, the Fisheries Research and Development Corporation and Australian fishing industry conducted a joint project to study the reproductive dynamics of Patagonian toothfish (Dissostichus eleginoides) around Heard Island and the McDonald Islands (HIMI, Division 58.5.2). Gonadosomatic data was available for 12 563 individuals. The histology of male and female gonads was also Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(FRDC Tactical Research Fund Project 2010/064, Final report (2012))

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Parasites are one of an integral part of any ecosystem and unfortunately knowledge about this ecological group in Antarctica is very scared. Partial geographical and ecological isolation of Antarctic circumpolar ecosystem plays its role on existence of endemic forms of animals, including parasites, which sometimes have unpredictably large sizes and distribution. The best example of it – Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(Proceedings of the 5th Russian conference with international participation on theoretical and marine parasitology, 23–27 April 2012, Kaliningrad (2012): 63–64)

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Waters around South Georgia are amongst the most productive in the Southern Ocean, and support internationally important fisheries. However, there is significant inter-annual variability in fish stocks, and some species have failed to recover from historical overfishing. Dispersal and retention of the planktonic stages (eggs and larvae) of marine fish can play a key role in the maintenance of Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(Mar. Ecol. Progr. Ser., in press. doi: 10.3354/meps09908. The abstract is available on www.int-res.com/prepress/m09908.html)

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Grenadiers Macrourus spp. are the main bycatch species in the exploratory longline fishery for toothfish Dissostichus spp. in the Ross Sea, Antarctica. Ongoing monitoring tools are needed to assess stock status of grenadiers in the Ross Sea and to ensure ecological relationships are maintained. There may be potential to use fisheries acoustic methods to obtain estimates of Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

Publicación:
(J. Ichthyol., 52 (10) (2012): 1–9)

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This work is based on material from Antarctic toothfish, collected in the Ross Sea from December 2004 to March 2005 on the longliner “Volna”.  Age was determined for 364 individuals. Currently widely applicable "the break and burn method" was used in the present work (Chilton, Beamish, 1982; Penttilla, Dery, 1988). According to the method, otolith is broken into two parts across the core Read More
Presentado por:
Sarah Mackey (Secretaría de la CCRVMA)

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