WG-FSA-15

En 2014, la Comisión reconoció la magnitud de la evolución registrada en los últimos años con relación a la pesca de investigación en pesquerías exploratorias, pesquerías cerradas y otras áreas, y solicitó un análisis de los requisitos de la MC 21-02 y otras medidas relacionadas (p. ej., las MC 21-01 y 24-01) a la luz de dicha evolución. Resulta evidente que hay una cierta desconexión entre la Read More
Presentado por:
Dr Christopher Jones (Estados Unidos de América)

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This paper summarises the implementation of conservation measures dealing with fishing and related activities in the 2014/15 fishing season (CM 41-01 to 41-11, 42-01, 42-02, 51-01 to 51-03, 51-07) including notifications of encounters with vulnerable marine ecosystems (VME) or potential VMEs (CM 22-06, 22-07).

In response to a request from New Zealand (COMM CIRC 15/15) the Secretariat undertook an analysis of the information provided by New Zealand in previous years (COMM CIRC 13/09), along with VMS records, CCAMLR Observer Reports and other information the Secretariat has available to facilitate further investigation. In 2013 reports of offal were tightly clustered in a small area on the border of Read More
Presentado por:
Dr Keith Reid

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Australia has undertaken an analysis of information relating to the Illegal, Unreported and Unregulated (IUU) fishing vessel (FV) Kunlun. The vessel was boarded on 26 February 2015 outside the Convention on the Conservation of Antarctic Marine Living Resources Area (CCAMLR Area) in order to verify its right to fly its flag, pursuant to Article 110 of the United Nations Convention on Read More
Presentado por:
Ms Lihini Weragoda

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At the recent CCAMLR Symposium held in Chile in May 2015, an issue that was discussed was improving CCAMR’s outreach and cooperation.  In this context some participants suggested that it would be beneficial for CCAMLR to have an ongoing dialogue with relevant States that manage toothfish fisheries outside the CCAMLR Area. 

In response to the discussion at the Symposium Read More
Presentado por:
Ms Lihini Weragoda

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Catches of toothfish, icefish and krill reported in the Convention Area in 2013/14 and 2014/15. Catches reported in 2013/14 were published in the CCAMLR Statistical Bulletin Volume 27 (https://www.ccamlr.org/en/data/statistical-bulletin). Catch totals for the current season (2014/15) are preliminary and based on data Read More
Presentado por:
Dr David Ramm (Secretaría de la CCRVMA)

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In response to a request from the Scientific Committee the Secretariat has initiated a process to utilise VMS data for data-quality assurance in relation to catch data. This represents a change in focus on the use of VMS data by CCAMLR and requires a contingent change in emphasis on data quality assurance processes in order to ensure that the VMS can be used with an appropriate degree of Read More
Presentado por:
Dr Keith Reid

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This paper summarises the data collected by Scientific Observers operating in the Convention Area on board longline and finfish trawl vessels during the 2015 season (based on data received by the Secretariat up to 09 October 2015).

Information on observer coverage, incidental mortality (including the implementation of mitigation related CMs), tagging and conversion factors is presented Read More
Presentado por:
Mr Isaac Forster (Secretaría de la CCRVMA)

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The product to green-weight conversion factors used in the toothfish fishery are integral to the reporting of catches and reconciling those catches with data reported via the CDS. This paper reviews the data available on conversion factor in the C2 and Observer data as well as the factors that might influence those conversion factors. There was considerable inter-vessel variability as well as Read More
Presentado por:
Dr Keith Reid

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The Secretariat has embarked on a major overhaul of CCAMLR data holdings and associated IT and data infrastructure. This work, which begun in 2013, includes developing an Enterprise Data Model, redeveloping the CCAMLR database, improving data quality assurance, and modernising the data work flow.

The user community can expect to notice significant improvements in data quality, database Read More
Presentado por:
Dr David Ramm (Secretaría de la CCRVMA)

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Following the recommendation of WG-FSA in 2014 the Secretariat has undertaken an analysis of bycatch in CCAMLR longline fisheries. The numerical target catch ratio (the number of target fish as a proportion of the total number of fish caught), using haul by haul data from the Ross Sea toothfish fishery from 2008 – 2014, was used as a single metric to examine the amount of bycatch reported by Read More
Presentado por:
Dr Keith Reid

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At the 2014/15 season the Spanish FV TRONIO had to return to Montevideo due to a collision with an ice block which caused a problem in a propeller, so it couldn’t perform the proposed research fishing in the 58.4.1 Division. A request to consider how to maximize the likelihood to undertake its research commitments was made by the WG-SAM-15. A minimum of 30 days within the 58.4.1 Division is Read More
Presentado por:
Mr Roberto Sarralde Vizuete (España)

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A summary of progress made regarding the ageing and growth studies for Dissostichus mawsoni from Division 58.4.1 is presented. It is included the methodology used in the otolith preparation and the interpretation criteria applied on age estimation, as well as the age-length key and growth parameters estimates by sex. Growth parameters obtained using length-age pair values are: L Read More
Presentado por:
Mr Roberto Sarralde Vizuete (España)

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Within the CCAMLR Area, the toothfish longline fishery is subject to depredation by top predators using the fishery as a source of additional food provisioning in several subareas. Depredation by toothed whales is well observed and documented in some subareas, but information on depredation by other species is not consistently or regularly recorded throughout the CCAMLR Area. This paper Read More
Presentado por:
Dr Marta Söffker (Unión Europea)

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A collaborative initiative to examine Antarctic toothfish (Dissosticus mawsoni) movement and habitat preference is being developed to support the research and monitoring within the proposed Ross Sea Region Marine Protected Area.  The objective is to deploy mark-report pop-off (mrPAT) tags and pop-up archival (MiniPAT) tags on fish within the General Protection Zone (GPZ) and Read More
Presentado por:
Dr Christopher Jones (Estados Unidos de América)

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This paper presents an update of the metrics of capacity and capacity utilisation presented in WG-SAM 14/19 in order to monitor trends in capacity in exploratory toothfish fisheries in Subareas 88.1 and 88.2. The updated metrics show the same pattern as the metrics based on the data up 2013 and do not indicate an excess capacity in the fishery. A measure of potential daily fishing capacity as Read More
Presentado por:
Dr Keith Reid

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Following advice from WG-SAM-15, a revised version of the reserach proposal for toothfish in Subarea 48.2 is presented (WG-SAM-15/53).

 

The annual random stratified trawl survey (RSTS) at HIMI was conducted during May of 2015, with the completion of 163 stations, an additional five stations compared with previous surveys. The extra five hauls were part of a redesign of the survey on the main trawl ground which consisted of sub-division into two boxes, one having 15 and the second 10 randomly allocated stations. In addition the Read More
Presentado por:
Dr Dirk Welsford (Australia)

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The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the vicinity of Heard Island during May 2015. 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 79o 20’ E using standard CCAMLR methods. A large 2+ cohort is dominating the population. These projections indicate Read More
Presentado por:
Dr Dirk Welsford (Australia)

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Identification of bycatch species for scientific observers can be a difficult task whilst at sea, as freely available resources are limited, and often cover only a selection of common species. In the past year the Secretariat has requested by-catch identification material from Members, and has received several responses, included a Korean guide presented at WG-EMM (WG-EMM-15/06). This paper Read More
Presentado por:
Dr Keith Reid

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Part of the remit of WG-SAM includes reviewing and providing advice to WG-FSA and the SC on the experimental design of research plans submitted under CM 21-02, and research proposals submitted under CM 24-01. A total of 34 papers was submitted to WG-SAM-15 for review under this agenda item alone. The large volume of papers, lack of consistent format, lack of clear performance review criteria, Read More
Presentado por:
Dr Steve Parker (Nueva Zelandia)

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Data on beach surveys, debris associated with seabird colonies, marine mammal entanglements and hydrocarbon soilings were received for 2015 from South Africa, the United Kingdom, the United States 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 Read More
Presentado por:
Ms Emily Grilly

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The current season (2014/15) is the final one of the first three-season research which began in 2013 in data-poor fisheries. In the present report, the next three-season (2016-18) research plan in Subarea 48.6 was revised using the updated CCAMLR C2 and Observer data.

The stock sizes for five research blocks (48.6_1, 48.6_2, 48.6_3, 48.6_4 and 48.6_5) were estimated by the Petersen Read More
Presentado por:
Dr Kenji Taki (Japón)

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The current season (2014/15) is the final one of the first three-season research which began in 2013 in data-poor fisheries. In the present report, the next three-season (2016-18) research plan in Division 58.4.1 was revised using the updated CCAMLR C2 and Observer data.

The stock sizes for five research blocks (58.4.1_1, 58.4.1_2, 58.4.1_3, 58.4.1_4 and 58.4.1_5) were estimated by the Read More
Presentado por:
Dr Kenji Taki (Japón)

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The current season (2014/15) is the final one of the first three-season research which began in 2013 in data-poor fisheries. In the present report, the next three-season (2016-18) research plan in Division 58.4.2 was revised using the updated CCAMLR C2 and Observer data.

The stock sizes for a research block (58.4.2_1) were estimated by the Petersen estimator and the CPUE x seabed Read More
Presentado por:
Dr Kenji Taki (Japón)

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The current season (2014/15) is the final one of the first three-season research which began in 2013 in data-poor fisheries. In the present report, the next three-season (2016-18) research plan in Division 58.4.3a was revised using the latest CCAMLR C2 and Observer data.

The stock sizes for block 58.4.3a_1 was estimated by the Petersen estimator and the CPUE x seabed analogy method. Read More
Presentado por:
Dr Kenji Taki (Japón)

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In this document, we revise stock status assessments of D. eleginoides in research blocks 58.4.4b_1 and 58.4.4b_2 using CPUE analogy method, Petersen method and CASAL model. Detailed results of reanalysis using CASAL models in research block 58.4.4b_1 are described in a separated document.

We reset the revised research blocs drawn along the outer margin of grids because the Read More
Presentado por:
Dr Kenji Taki (Japón)

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This report arranged the biological information with special reference to bycatch, depredation and spawning dynamics in Division 58.4.4 a & b during 2008-14 seasons in response to the recommendations in the last WG-SAM meeting and their related issues.

D. eleginoides (TOP) was highest both in weight and number, accounting for 93% and 76% of the total catch, respectively, Read More
Presentado por:
Dr Kenji Taki (Japón)

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We revised sensitivity runs of age-structured and two fisheries (≥1 300 m and < 1 300 m) CASAL models for stock status assessments of Dissostichus eleginoides in the research block 58.4.3a_1 following the recommendations of the last WG-SAM meeting. Total of four runs were carried out. Among them three runs were carried out using the latest information on age-length relationship in Read More
Presentado por:
Dr Kenji Taki (Japón)

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We presented five sensitive runs of single-sex age-structured CASAL models for stock status assessments of Dissostichus eleginoides in the research block 58.4.4b_1 in the last WG-SAM meeting. IUU catch was estimated within the models using disease mortality functionality. Among them, the plausible model was considered as OB_1b model, which removed tag and CPUE observations in 2008, Read More
Presentado por:
Dr Kenji Taki (Japón)

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At WG-SAM-15, Japan indicated it would submit a revised proposal on the design of research block 48.6_4 to WG-FSA-15. Here we propose the westward expansion of the research block along the continental shelf-slope to promote sufficient utilization of the catch limit, which would enable us to complete planned research and support a more reliable stock assessment. The revised design may also Read More
Presentado por:
Dr Taro Ichii

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A stratified bootstrap of icefish catch density based on the UK 2015 demersal fish survey catch rate data indicated a biomass of 59,081 tonnes (lower one sided 5^th percentile: 36,530 tonnes) within Statistical Subarea 48.3. Projections for the 2015/16 and 2016/17 seasons applying the CCAMLR harvest control rule lead to catch limits (TAC) of 3,461 tonnes for 2015/16 and 2,074 tonnes Read More
Presentado por:
Dr Chris Darby

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At its 2014 meeting, WG-FSA recommended that details of fishing gear used in trawl surveys (in addition to longline research) should be submitted to the CCAMLR fishing gear ‘library’ (SC-CAMLR-XXXIII p 3.76). This paper provides detailed diagrams of the FP-120 net which has been used for sampling demersal fishes on the UK groundfish survey in CCAMLR subarea 48.3 since 1991.

Russian Federation is going to continue investigation for toothfish in Ross Sea in fishing seasons 2015-2018. The present program aims to recapture tagged fishes released during the implementation of the previous research program took place in 2010-2012 fishing seasons and investigate resource potential and life cycle of Dissostichus species within the eastern part of the Ross Sea Read More
Presentado por:
Mr Dmitry Kremenyuk (Federación de Rusia)

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This paper describes an update to the CASAL assessment of Patagonian toothfish (D. eleginoides) in Subarea 48.4. The assessment data time series are updated with the observations for the 2014/15 season and several minor changes to the assessment are made: revision of tagging and recapture data for the full time series, a revised maturity ogive, and changes to the assumed tag growth Read More
Presentado por:
Dr Chris Darby

Aprobado por:
Ms Doro Forck (Secretaría de la CCRVMA)

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Research program in the Weddell Sea in season 2015/2016 and the following seasons presented by the Russian Federation was prepared in accordance with recommendations of the Scientific committee (SC-CAMLR-XXXIII, 2014, par. 3.233) and originates from the program developed by the Russian Federation and adopted by the SC in 2012 (WG-FSA-12/12). Past WG-SAM-2015 (Warsaw, Poland) made no Read More
Presentado por:
Mr Dmitry Kremenyuk (Federación de Rusia)

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In January 2015 the UK undertook a bottom trawl survey of CCAMLR sub-Area 48.3 on the FV New Polar. A total of 77 random and representative hauls were completed giving good geographic coverage and encompassing depths between 108 and 352m. The overall biomass of mackerel icefish (Champsocephalus gunnari) was calculated at 48,543 tonnes with a lower 1-sided 95% interval Read More
Presentado por:
Dr Chris Darby

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The stock of Antarctic toothfish in the CCAMLR subarea 48.4 was conservatively estimated using the Chapman method as 621 tonnes. At a harvest rate of γ = 0.038 this would indicate a 2015/16 yield of 24 t for the Antarctic toothfish in the region, compared to the previous 2014/15 estimation of 28 tonnes.

The first year of a two-year and multi-member research survey using standardised longline gear to sample toothfish populations was carried out in the northern areas (60°‑ 66° S) of SSRUs 88.2A–B. The sampling strategy and data collection adhered to standards set in CM 41-10 (2014). A total of 109.1 t of Antarctic toothfish and two Patagonian toothfish (0.029 t) were caught. Toothfish Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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We propose to implement a random, depth-stratified vertical longline survey conducted through the annual sea ice in McMurdo Sound to monitor the age composition, diet, maturity, and local abundance of Antarctic toothfish. A pilot season was carried out in 2014, where sampling gear and methodology for a standardised hook and line survey were trialled in McMurdo Sound. Data collected will be Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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A research proposal to continue the southern Ross Sea sub-adult toothfish survey for the next two years, 2016 and 2017, is presented. The survey will continue to focus primarily on estimating the relative abundance of sub-adult (<110 cm TL) toothfish in the core strata (A, B, C) in SSRUs 88.1J and 88.1L so as to provide a time series of recruitment of toothfish. This is a continuation of Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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The effect of sea ice is acknowledged as a major influence on fishing operations in high latitudes but not widely understood in detail other than by fishers and specialists in Antarctic fisheries research and management. A retrospective analysis over a 15 year period up to the 2013/14 season was presented in WG-FSA-14/55 to quantify the level of impact that ice conditions have on fishing by Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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This report summarises the timing, depth, and location of fishing effort together with biological characteristics of the catch of Antarctic toothfish up to and including the 2015 season. In 2015, the Ross Sea slope SSRUs were significantly constrained by sea ice and catches were unevenly distributed across the three SSRUs (73% in 88.1H, 22% in 88.1K and 5% in 88.1I). As in recent years, the Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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We provide an update of the descriptive analyses of the toothfish tagging programme in Subareas 88.1 and 88.2 through the 2015 season. A total of 44 827 Antarctic toothfish have been released and 2473 recaptured, and 1191 Patagonian toothfish released and 103 recaptured since 2001. In recent years, most vessels have achieved or exceeded the required tagging rate of one toothfish per tonne of Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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We provide an update of the Bayesian sex and age structured population stock assessment for Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region (Subareas 88.1 and SSRUs 88.2A–B), using catch, catch-at-age, and tag-recapture data from 1997–98 to 2014–15 and including the results from the Ross Sea shelf survey from 2012 to 2015. The model results were similar to the 2013 Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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We provide extensive diagnostic plots for models R1 and R2 for Antarctic toothfish in the Ross Sea as recommended by SAM-2015 (2015). The stock assessment rationale and models as well as their main diagnostics are described in Mormede et al. (2015). The CASAL files for models R1 and R2 were provided to the CCAMLR Secretariat as a zip file.

In this paper we Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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Data are collected for use in scientific research, the results of which are used to inform management decisions made to achieve specific goals. Any data collection plan should be drawn from the goals the management wishes to achieve. The long-term goals of the Ross Sea fishery based on Article II of CCAMLR can be summarised as: the target fished population is above a level which ensures stable Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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Between 2001 and 2013 the number of breeding pairs of Adélie penguins (Pygoscelis adeliae) at breeding colonies in the southern Ross Sea more than doubled from about 235 000 to more than half a million. It has been suggested that predation release of Antarctic silverfish (Pleuragramma antarctica) due to fishing of one of its predators, Antarctic toothfish (Dissostichus Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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One aim of Marine Protected Areas (MPAs) is to protect a representative portion of specific ecosystem functions through spatial closures to extractive practices such as fisheries. Although they usually involve the displacement of fisheries, their design rarely takes into account the effect of that fishery’s displacement on the target fish population. We used a spatially explicit population Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

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The investigations in March-April 2015 were conducted in subarea 48.2 by Ukrainian longliner SIMEIZ . 29 sets were completed during the survey. Altogether 157 specimens of Dissostichus mawsoni and 21 specimens of Dissostichus eleginoides were tagged.  124 otolith pairs of Dissostichus mawsoni and 87 - Dissostichus eleginoides Read More
Presentado por:
Dr Leonid Pshenichnov (Ucrania)

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The stock abundance of Antarctic toothfish in Subarea 48.4 is estimated using tag based mark-recapture analysis. During WG-FSA-14 the recommendation was made that the stock should move from the Petersen estimation method to the use of the Chapman bias corrected estimator; a correction specifically developed to reduce estimation bias in populations with low recaptures, a feature typical of the Read More
Presentado por:
Dr Chris Darby

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During March-April 2015 Ukraine began the research within statistical subarea 48.2. The research activities on the assessment of the stock state of the Dissostichus spp species in subarea 48.2 will be carried out within three years. Implementation of the tagging program in the long-term prospective will provide the indicators for the procedure of abundance assessment of the studied Read More
Presentado por:
Dr Leonid Pshenichnov (Ucrania)

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Age determination of the Patagonian (Dissostichus eleginoides) and Antarctic toothfish (Dissostichus mawsoni) is conducted using otoliths, collected while carrying out the scientific program on board the Ukrainian vessel “Simeiz” in the Northern part of Weddell Sea (statistical Subarea 48.2) in March 2015. 124 otolith pairs of Dissostichus mawsoni and 87 otolith Read More
Presentado por:
Dr Leonid Pshenichnov (Ucrania)

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Exploratory fishing for toothfish (Dissostichus spp.) in East Antarctica (Divisions 58.4.1 and 58.4.2) began in 2003. Robust stock assessment and catch limits according to CCAMLR decision rules remain to be determined for these Divisions. Accordingly, a research plan has been developed under Conservation Measure 41–01 to support a proposal for an Australian vessel to participate in Read More
Presentado por:
Dr Dirk Welsford (Australia)

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Season extension trials occur step-wise in the longline fishery for Dissostichus eleginoides in Statistical Division 58.5.2.  This paper presents results of trial fishing season extensions for the periods between 15 and 30 April, and between 1 and 14 November, during 2013/14 and 2014/15.  Based on the results, it proposes a new step-wise trial pre-season extension of Read More
Presentado por:
Dr Dirk Welsford (Australia)

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In New and Exploratory fisheries for toothfish, mark-recapture plays a critical role to estimate biomass in the initial stage of developing an assessment. This short paper describes the use of the R package tagr to obtain Petersen / Chapman estimates of abundance. The package implements a non-parametric bootstrap to obtain confidence intervals from Read More
Presentado por:
Dr Dirk Welsford (Australia)

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The annual Random Stratified Trawl Survey was undertaken within Division 58.5.2 during May 2015. Recent work which is presented here has allowed for many of the biological parameters of Channichthys rhinoceratus to be updated from previous assessments (Constable et al. 1998) and many parameters to be calculated which were previously unknown for the area within Division 58.5.2 Read More
Presentado por:
Dr Dirk Welsford (Australia)

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The grey rockcod (Lepidonotothen squamifrons) was fished to commercial extinction on the Kerguelen Plateau by unregulated fishing during the 1970s/80s. Since the mid-1990s little work has been performed to assess the status of this species within the Heard Island and McDonald Island region (CCAMLR Division 58.5.2). This study has updated a range of biological parameters such as growth Read More
Presentado por:
Dr Dirk Welsford (Australia)

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This paper presents an updated assessment for the Patagonian toothfish (Dissostichus eleginoides) fishery at the Heard Island and the McDonald Islands in CCAMLR Division 58.5.2 with data until end of July 2015. The updated assessment model is based on the best available estimates of model parameters, the use of abundance estimates from a random stratified trawl survey (RSTS), longline Read More
Presentado por:
Dr Philippe Ziegler (Australia)

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Incidence of odontocete depredation, involving sperm whales (Physeter microcephalus) and orcas (Orcinus orca) has been reported in nearly all of the Patagonian toothfish (Dissostichus eleginoides) longline fisheries in the Southern Ocean (Moir Clark and Agnew 2010, Tixier et al 2010, Soeffker and Tixier 2015, Söffker et al. 2015). The first reports Read More
Presentado por:
Dr Dirk Welsford (Australia)

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At WG-SAM-15, it was noted that 5 members, Australia, France, Japan, Korea and Spain had notified to conduct research in the exploratory toothfish fisheries off East Antarctica, covered by CCAMLR Divisions 58.4.1 and 58.4.2. This proposal seeks to establish an arrangement whereby all notified members have a catch allocation to undertake research, thereby avoiding Olympic fishing.

In 2014, CCAMLR endorsed a TAC of 4410 t of Patagonian toothfish in Division 58.5.2. This report describes the recent fishing and data collection activities in the fishery. The fleet has expanded to include 6 vessels, 5 operating exclusively longline, and one dual purpose longliner/trawler. To enhance the tagging program that was established in 1998, the fleet has increased tagging rate in Read More
Presentado por:
Dr Dirk Welsford (Australia)

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Most things related to Dissostichus spp. in the eastern side of Antarctic has not been known well as namely the area is data poor areas. 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 1,000-2,000 t per SSRU in 58.4.1. During the Read More
Presentado por:
Dr Seok-Gwan Choi (República de Corea)

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The stocks of Antarctic toothfish, Dissostichus mawsoni were a relatively economically and ecologically important fishery resource in the waters of Antarctic. However, there is not enough data and information to assess the robust stocks and deliberate proper measurements for sustainable utilize, especially relate to diet and feeding strategy which may lead to think about Read More
Presentado por:
Dr Seok-Gwan Choi (República de Corea)

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Assessment of the Patagonian toothfish (D.eleginoides) in Subarea 48.3 indicates that the current status of the stock is at 52% of B0. Spawning biomass has been increasing in recent years. The 2008 year class is estimated to be well above average. Provisional projections indicate that a catch limit set at around 2,750 tonnes would be expected to keep the stock at or above 50% of B0 Read More
Presentado por:
Dr Chris Darby

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Model diagnostics have been  applied to CASAL-based assessments of toothfish populations (Ziegler et al., 2015; SC-CAMLR-XXXIV/05, Appendix D). Similar diagnostics can be applied to any integrated model. The purpose of this note is to use some of these methods to explore aspects of the assessment being developed to set catch limits for Antarctic krill in Subarea 48.1.

A "base-case Read More
Presentado por:
Dr Doug Kinzey

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Research into the early life stages of Pleuragramma antarctica is essential to understanding how oceanographic variation will impact spatial distributions over time. The recent findings of nursery grounds in Terra Nova Bay have led to added inquiry into larval distribution and life history traits in the Ross Sea. A report submitted to the CCAMLR-EMM working group last year provided Read More
Presentado por:
Dr Marino Vacchi (Italia)

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In 2014, the Scientific Committee noted that it needed to develop advice routinely on the potential impacts on dependent and related species for proposed exploratory fisheries and requested working groups consider how to report on these issues, which also form part of the review procedures under Conservation Measure 22-06 and 22-07. It requested Members to submit analyses for consideration. Read More
Presentado por:
Dr Andrew Constable (Australia)

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Grenadiers (Macrourus spp.) are a common by-catch of the Australian fisheries in Division 58.5.2, particularly for longline operations targeting Patagonian toothfish (Dissostichus eleginoides) (Van Wijk & Williams 2003; CCAMLR 2014). Improved identification tools and targeted sampling during the 2015 random stratified trawl survey confirmed that Caml grenadier ( Read More
Aprobado por:
Admin Admin (Secretaría de la CCRVMA)

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Understanding and predicting the distribution of Antarctic toothfish (Dissostichus mawsoni) habitat suitability at different spatial and temporal scales can make an important contribution to CCAMLR’s management of this species. In this paper the use of Maxent models with fishery catch data and environmental data to provide a circumpolar prediction of Antarctic toothfish habitat Read More
Presentado por:
Dr Lucy Robinson (Secretaría de la CCRVMA)

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The subarea 88.3 is a large area contained from 105°W to 70°W where has been closed to directed fishing following the results of a Chilean survey activities in 1998 (SC-CCAMLR-XVII/BG/7). Previous three research surveys conducted by the New Zealand and the Russian flagged vessels since 1998. It was noted that 8 D. Mawsoni were tagged by the New Zealand in the 2004/2005 season and 123 Read More
Presentado por:
Dr Seok-Gwan Choi (República de Corea)

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The end of the 2014/15 season will see the completion of the third year of the multi-year research plan being jointly undertaken by Japan and South Africa in Subarea 48.6. The progress report presented at WG-SAM-15 (WG-SAM-15/50) has not been updated for WG-FSA as neither of the vessels undertaking the research returned to the study area over the winter.

WG-SAM-15 requested that a Read More
Presentado por:
Dr Rob Leslie (Sudáfrica)

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Regarding the low levels of stocks of Dissostichus spp. and the high levels of IUU fishing, CCAMLR decided to close the fishery in 2002 in division 58.4.4. Since 2008 only one vessel, Shinsei maru No. 3, had conducted research fishing in accordance with a research plan submitted under CM 24-01. In 2014, WG-FSA agreed research fishing conducted in the research blocks C and D by two Read More
Presentado por:
Mr Jonathan Cholet (Francia)

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An updated assessment of the Patagonian toothfish (Dissostichus eleginoides) stocks in Kerguelen area is presented. This study is based on a CASAL (C++ Algorithmic Stock Assessment Laboratory) model. Different statistical and biological datasets are used: catches, tag releases/recaptures data, commercial catch-at-length, data from the “PoKer” surveys, and the last age readings.

An updated and revised assessment of the Patagonian toothfish (Dissostichus eleginoides) stocks in Crozet areas is presented. This study is based on a CASAL (C++ Algorithmic Stock Assessment Laboratory) model. Different statistical and biological datasets are used: catches, tag releases/recaptures data and commercial catch-at-length data.

This photographic guide has been developed with the aim of assisting observers at sea in the correct identification of seabirds. It does this through providing several images for each species, at different stages and different angles both in the air and in the water. This project has been achieved thanks to French observers at sea working in Kerguelen and Crozet waters under the TAAF Read More
Presentado por:
Mr Nicolas Gasco (Francia)

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Depredation is observed in many places within the convention area and is an increasing concern for fishery. Killer whale and sperm whales are the two odontocetes species mainly responsible for this issue. One of the key point to understand the process of depredation is to use photo-identification, pictures taken by observers on board longline vessels targeting toothfish have been analysed. Read More
Presentado por:
Mr Nicolas Gasco (Francia)

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Depredation is an increasing concern in areas where Patagonian toothfish is targeted. In order to assess its effect and understand the process of depredation by killer whales and sperm whales, good quality data needs to be collected at sea. This paper describes the different variables collected by observers within French EEZ (area 58.5.1 and 58.6).

Exploratory fishing for toothfish (Dissostichus spp.) in Division 58.4.1 began in 2003. Robust stock assessment and catch limits according to CCAMLR decision rules remain to be determined for this Division. In 2008, only one vessel, Tronio, has conducted research fishing in accordance with a research plan submitted under CM 24-01. France notifies its wish to collaborate in this Read More
Presentado por:
Mr Jonathan Cholet (Francia)

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Exploratory fishing for toothfish (Dissostichus spp.) in Division 58.4.2 began in 2003. Robust stock assessment and catch limits according to CCAMLR decision rules remain to be determined for this Division. In 2014, the fishery was limited to one Japanese and one Spanish flagged vessel using longlines only, but there was no fishing activity. France notifies its wish to collaborate in Read More
Presentado por:
Mr Jonathan Cholet (Francia)

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Being able to correctly identify species is crucial in observer’s tasks and data quality implies very good knowledge from observers. Identification quality is related to observer’s training and resources provided by technical coordinators.

This document describes a tool developed as a “serious game” for observers to more easily learn species names before to go at sea or when steaming Read More
Presentado por:
Mr Nicolas Gasco (Francia)

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Within the CCAMLR area, high quantities of images are collected by scientific observers at sea while performing the tasks outlined the Scheme on International Scientific Observation (SISO). These include photos of tags, cetaceans, birds and bird bands, fishing gear, or unusual and unidentified species. In order to maintain version control, to process and file the photographs efficiently, and Read More
Presentado por:
Mr Nicolas Gasco (Francia)

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Conversion Factor is a crucial value used to calculate green weight using product weight and thus assess the amount of fish withdrawn from the stock. This paper describes factors influencing conversion factor using data collected on Patagonian toothfish within the French EEZ, results emphasise the need to calculate CF with a sub-sample of the catch that is representative of the total catch in Read More
Presentado por:
Mr Nicolas Gasco (Francia)

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In Division 58.4.3a, since 2012, research fishing has been conducted in the research block by two vessels using longlines: Shinsei Maru No. 3 (Japan) and the Saint André (France). The catch limit for Dissostichus spp. is 32 tonnes and the total reported catch up in 2013/2014 was 32 tonnes. France notified its intention to continue its exploratory fishery over the coming years in order Read More
Presentado por:
Mr Jonathan Cholet (Francia)

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A dramatic reduction in catch rates of Antarctic toothfish in McMurdo Sound, Antarctica, has led to conclusions that the commercial bottom longline fishery for toothfish in the Ross Sea has drastically altered the toothfish population with cascading effects on the McMurdo Sound ecosystem. However, results from a new monitoring programme for Antarctic toothfish and other top predators carried Read More
Presentado por:
Dr Rohan Currey (Nueva Zelandia)

Publicación:
Ant. Sci., (2015), doi: 10.1017/S0954102015000450

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A multi-year research plan as outlined in CM 41-04 (2012, 2013 & 2014) was initiated Statistical Subarea 48.6 by Japan and South Africa during the 2012/13 fishing season. Two vessels participated in the research project in each of the three fishing seasons and the progress achieved during the first 2.5 years is reported.

Between December 2012 and April 2015 a total of 291 Read More
Presentado por:
Dr Rob Leslie (Sudáfrica)

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