WG-EMM-2024

Ce document traite de l'attribution de critères clairs et transparents au terme « meilleures preuves scientifiques disponibles » qui est utilisé dans l'article IX(f) de la Convention de la CCAMLR. Il est urgent et pertinent de clarifier les aspects scientifiques et juridiques de ce terme du fait de la présence de certains éléments importants dans l'ordre du jour de la CCAMLR, plus Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Svetlana Kasatkina (Fédération de Russie)

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Les études multidisciplinaires assorties d'échantillonnages acoustiques, océanographiques et par chalutage ainsi que d'observations régulières en mer d'oiseaux et de mammifères menés en 2020 par le navire de recherche Atlantida dans la sous-zone (48.1) de la péninsule antarctique remet en cause l'hypothèse selon laquelle la pêche aurait un impact sur les ressources de krill et les prédateurs Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Svetlana Kasatkina (Fédération de Russie)

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Note to participants: please read Annex 1 first.

Abstract:

This document summarizes the current and ongoing development of the revised approach to the management of the Antarctic krill fishery. The revised approach was adopted by CCAMLR in 2019 and integrates three components, namely regular updates of biomass estimates, a population projection model to estimate Read More
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)

Approuvé par:
Catherine Stubberfield (Secrétariat de la CCAMLR)

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Following feedback on the previous iteration of this report, this document presents an updated analysis of observer sampling rates for each vessel that fished for krill in the last five completed seasons (2019–2023) in Subareas 48.1–48.3. The analysis now includes sample sizes and warp observation rates computed as a function of fishing event duration. Current sampling rates requirements are Read More
Soumis par:
Stéphane Thanassekos (Secrétariat de la CCAMLR)

Approuvé par:
Catherine Stubberfield (Secrétariat de la CCAMLR)

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The spread of the high pathogenicity avian influenza (HPAI) H5N1 subtype has had dramatic impacts on commercial poultry farms and numerous populations of wild birds and mammals. Here we document the detection, monitoring, and impact of the first documented outbreak of H5N1 HPAI in the subantarctic region, at Bird Island (South Georgia). Mortalities from HPAI were first suspected in Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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Autonomous fixed-wing drones operating beyond visual line of sight of the pilot were used to conduct the first ever aerial, multi species baseline reference survey of land-breeding marine predators at South Georgia (Subarea 48.3).  Long term population monitoring in this remote, challenging environment has historically proved difficult, with routine monitoring generally limited to Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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Environmental monitoring along 5 set transects off South Orkney Islands in the Southern Ocean have been carried out annually (since 2011) by the Institute of Marine Research, Norway. Hydro-acoustic as well as net derived data are used to calculate biomass of Antarctic krill (Euphausia superba) but also to assess spatial distribution and demographic Read More
Soumis par:
Bjørn Krafft (Norvège)

Approuvé par:
Bjørn Krafft (Norvège)

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This document summarizes findings from studies on meso- and macrozooplankton conducted on data collected during an expedition on board RV Kaiyo-maru in CCAMLR division 58.4.1 in 2018/2019 (KY1804 survey). During the KY1804 survey, samples were collected from 15-200 m depth (epipelagic layer) using a Rectangular Read More
Soumis par:
Fokje Schaafsma (Pays-Bas, Royaume des)

Approuvé par:
Fokje Schaafsma (Pays-Bas, Royaume des)

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The workshop took place at the Institute for Marine and Antarctic Studies (IMAS) in Hobart on March 25th and 26th. Kerrie Swadling organised it, and the discussions were led by K. Swadling, A. Makhado, and P. Koubbi, who are the leaders of the PHOCIS project: Pelagic high seas ocean ecoregionalisation of the Indian s Read More
Soumis par:
Azwianewi Makhado (Afrique du Sud)

Approuvé par:
Azwianewi Makhado (Afrique du Sud)

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We propose a framework to consider scientific data collection needs to facilitate review and enhancement of CCAMLR data collection programs to support the work of the Scientific Committee.

The CCAMLR marine debris monitoring program (MDMP) compiles data from surveys and opportunistic sightings conducted by Members, fishing gear reported by vessels and CCAMLR Scheme of International Scientific Observation (SISO) observers as lost by fishing vessels, and marine debris (including fishing gear) observed at-sea by observers. Most debris reported are plastic items or fishing gear, and Read More
Soumis par:
Claire Van Werven (Secrétariat de la CCAMLR)

Approuvé par:
Mariana Cordeiro (Secrétariat de la CCAMLR)

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This paper summarizes the Antarctic Endeavour activities carried out in the Antarctic krill (Euphausia superba) fishery to produce krill meal between January and June 2023. The effort, catch, CPUE, and length-frequency distributions of captured krill are recorded per trip and Subareas 48.1 and 48.2. Also, trip-by-trip bycatch data from each Subarea is provided. Information is also given Read More
Soumis par:
Francisco Santa Cruz (Chili)

Approuvé par:
Francisco Santa Cruz (Chili)

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CCAMLR is currently developing a new management approach for the krill fishery in Area 48, with a parallel initiative underway to designate an MPA in planning domain 1 (Subareas 48.1 and 48.2). In the meantime, the fishing industry agreed to voluntary closed areas (voluntary restricted zones, VRZs) in the vicinity of penguin colonies during the summer breeding season in Subarea 48.1, Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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Japan is a country with a long history of commercial fisheries targeting Antarctic krill (Euphausia superba). While some datasets have been shared with CCAMLR, other datasets that may contain scientifically important information, have not been identified and analyzed. Reorganizing and digitalizing approximately 40 Read More
Soumis par:
Mao Mori (Japon)

Approuvé par:
Takehiro Okuda (Japon)

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This letter draws attention to the immediate and elevated risks of high pathogenicity avian influenza (HPAI) to marine mammals in Antarctica, particularly the imperiled South Shetland fur seal (SSAFS). Within the last few months this virus has reached the Antarctic Peninsula putting millions of krill predators at risk. This virus is just one of several conservation threats that SSAFS are Read More
Soumis par:
Douglas Krause (États-Unis d'Amérique)

Approuvé par:
George Watters (États-Unis d'Amérique)

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This document outlines the research cruise of dedicated sighting surveys under the non-lethal Japanese Abundance and Stock structure Surveys in the Antarctic (JASS-A program) during the 2023/24 austral summer season. The main research objectives of JASS-A are i) the study of the abundance and abundance trends of large whale species, and ii) the study of the distribution, movement and stock Read More
Soumis par:
Hiroto Murase (Japon)

Approuvé par:
Takehiro Okuda (Japon)

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Demersal fish are a critical component of Antarctic marine ecosystems and may consume relatively large proportions of Antarctic krill (Euphausia superba). Along with other krill-dependent predators, their reliance on krill as a primary prey resource places them at risk from competition with commercial krill Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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The outcomes of the Workshop on Climate Change (WS-CC-2023) were presented to the Scientific Committee (SC-CAMLR-42/11) and all recommendations were endorsed (SC-CAMLR-42). This paper highlights those recommendations directed to, as well as others of relevance to, CCAMLR’s Working Group on Ecosystem Monitoring and Management (WG-EMM). Recalling that Read More
Soumis par:
Rachel Cavanagh (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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Euphausia superba (Antarctic krill) is a key component of the South Georgia (SG) ecosystem, supporting important populations of higher predators including seabirds, seals and whales. It is also the focus of a commercial fishery, which operates exclusively during winter. However, until recently, little has been known about the distribution of krill Read More
Soumis par:
Cecilia Liszka (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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The U.S. AMLR Program conducts annual field studies to assess the status and trends of several CCAMLR Ecosystem Monitoring Program (CEMP) penguin and seal indicator taxa. We provide a brief update on data from several monitored breeding populations and demonstrate continued trends in abundance, identify key relationships with krill resources, and reiterate a call for Read More
Soumis par:
Jefferson Hinke (États-Unis d'Amérique)

Approuvé par:
George Watters (États-Unis d'Amérique)

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The presence of bycatch in Antarctic krill (Euphasia superba) fishing operations in statistical subareas 48.1 and 48.2 was determined on board the Antarctic Endeavour factory ship in 10 fishing trips made between 2017-2018 and 2020-2021 seasons. In each haul, organisms other than the target species were removed from the conveyor belt, identified by species, and weighed, which were later Read More
Soumis par:
Francisco Santa Cruz (Chili)

Approuvé par:
Francisco Santa Cruz (Chili)

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• This paper provides an overview of CCAMLR-related ecosystem monitoring and scientific activities undertaken by the British Antarctic Survey (BAS) during the period April 2023 to March 2024. 
• The season saw record low Antarctic sea ice around the continent.
• Several large icebergs passed through the South Georgia region shedding substantial numbers of smaller Read More
  Soumis par:
  Claire Waluda (Royaume-Uni)
  
  Approuvé par:
  Martin Collins (Royaume-Uni)
  
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Assessing the spatial overlap between krill fisheries and krill predators is challenging due to the logistical and financial constraints associated with monitoring at the scale of management units. As a result, many existing studies are spatially and temporally limited. Here, we analysed more than 30'000 hours of echosounder data collected during commercial fishing operations by three vessels Read More
Soumis par:
Dominik Bahlburg (Allemagne)

Approuvé par:
Bettina Meyer (Allemagne)

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WG-FSA estimated in 2022 a krill Precautionary Catch Limit for Subarea 48.1, which remains to be implemented, despite the urgency of the matter. The present report provides considerations and recommendations as to how implement a first-stage update of CM 51-07 and related measures.

We highlight spatial differences across Subarea 48.1 in the availability of data required to implement the revised krill fishery management approach. Currently the spatial overlap analysis (SOA) has been applied to approximately 50% of Subarea 48.1, which includes the majority of past fishing locations and which we call the SOA area. A catch limit has been proposed for Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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The krill fishery management strategy endorsed by CCAMLR in 2019 requires: krill biomass estimates, a yield model to estimate harvest rates, and a Spatial Overlap Analysis (previously Risk Assessment) to spread the catch limit among Management Units. We report on the progress and workplan to conduct the Spatial Overlap Analysis in Subareas 48.2 and 48.3. While work is Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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The Spatial Overlap Analysis (SOA, previously Risk Assessment) forms part of the three-part management approach endorsed by CCAMLR in 2019. We have implemented the SOA in the proposed candidate Management Units (MUs) described in Warwick-Evans et al. (2024, Scenario 1) and in two slightly modified versions of these candidate MUs (Scenarios 2 and 3). We also conducted a Read More
Soumis par:
Vicky Warwick-Evans (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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Despite the recognized importance of Antarctic krill in the carbon cycle, in particular in carbon sequestration, around 400,000 tons of krill are harvested each year, potentially hampering the associated carbon sink. Yet, the spatial variability of krill-mediated carbon sequestration is still poorly known since krill biomass is heterogeneously distributed in the Southern Read More
Soumis par:
Marc Eléaume (France)

Approuvé par:
Marc Eléaume (France)

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Domain 1 (D1) gathers multiple challenging elements for fisheries management and Convention objectives achievement. While D1 is one of the areas with the highest abundance of krill and therefore, a large number of marine predators concentrate, there is also an important pelagic trawl fishery targeting krill aggregations since the 1980s, which in recent years has reached the highest catch Read More
Soumis par:
Francisco Santa Cruz (Chili)

Approuvé par:
Francisco Santa Cruz (Chili)

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WG-FSA estimated in 2022 a krill Precautionary Catch Limit for Subarea 48.1, which remains to be implemented. At the time, concerns were raised about the lack of a workplan for obtaining regular updates of the Precautionary Catch Limit (PCL). Here we propose an overall workplan for regularly updating the PCL for Subarea 48.1 and the elements required for such endeavor Read More
Soumis par:
Tor Knutsen (Norvège)

Approuvé par:
Bjørn Krafft (Norvège)

Over the coming years CCAMLR has a priority to review and enhance CEMP to improve links between ecosystem monitoring and management decisions. To help inform this review, we present an overview of the remotely-operating time-lapse nest monitoring cameras operating around Antarctica. We propose that nest cameras provide a complementary cost-effective tool to Read More
Soumis par:
Louise Emmerson (Australia)

Approuvé par:
Philippe Ziegler (Australia)

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Because Antarctic wildlife are important indicators of ecosystem change in the Southern Ocean (SO), CCAMLR’s ecosystem monitoring program (CEMP) focuses on a suite of krill-dependent indicator species to ensure that the harvesting of SO living resources takes account their needs. Over the coming years CCAMLR has a priority to review CEMP to improve links between Read More
Soumis par:
Louise Emmerson (Australia)

Approuvé par:
Philippe Ziegler (Australia)

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The CCAMLR Ecosystem Monitoring Program (CEMP) has remained largely unchanged since it was established in 1985.  The current CEMP is focussed on land-based krill-eating predators that are monitored in colonies close to Member’s research stations and, with increases in the krill fishery, the ongoing recovery of baleen whales and rapid environmental change, there is Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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• Key life history parameters of selected indicator species are monitored as part of the CCAMLR Ecosystem Monitoring Program (CEMP). The diets of penguins are currently monitored using stomach lavage techniques to identify prey composition and mass. 
• DNA metabarcoding of prey DNA in faeces (DNA dietary analysis) provides a complementary, non- invasive technique that yields Read More
  Soumis par:
  Louise Emmerson (Australia)
  
  Approuvé par:
  Philippe Ziegler (Australia)
  
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Understanding predator-prey relationships is essential for monitoring Antarctic marine ecosystem structure and function, assessing changes in predator abundance, and implementing effective conservation measures. Despite this, diet studies of Antarctic predators using traditional methods are limited outside the breeding period due mainly to constraints Read More
Soumis par:
María Mercedes Santos (Argentina)

Approuvé par:
María Mercedes Santos (Argentina)

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A review of the CCAMLR Ecosystem Monitoring Programme (CEMP) to inform the revised krill fishery management approach, and provide information on the health and status of krill- and non-krill-dependent predators, commenced in 2023 and included discussion of cetacean science. This development provides an opportunity for the Scientific Committee of the Read More
Soumis par:
Nat Kelly (Australia)

Approuvé par:
Philippe Ziegler (Australia)

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The management of commercial harvesting of Antarctic marine living resources, following the 'ecosystem approach' of the CAMLR Convention, necessitates considering the impacts on both target and dependent species. The CCAMLR Ecosystem Monitoring Program (CEMP), established in 1989, aims to detect significant changes in key marine ecosystem components and differentiate between Read More
Soumis par:
Sara Labrousse (France)

Approuvé par:
Marc Eléaume (France)

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Abstract: Species distribution models are commonly used to predict krill distribution but often suffer from data heterogeneity, which compromises the accuracy of modeling relationships with environmental factors. To address these challenges, our study employs geostatistical models with spatiotemporal effects using Integrated Nested Read More
Soumis par:
Xiu Xia Mu (Chine)

Approuvé par:
Mariana Cordeiro (Secrétariat de la CCAMLR)

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In this paper, the authors consider the efficiency of observer krill samples in the context of Scientific Observer’s Manual to sample 200 individuals every 3 or 5 days regardless of the number of hauls and the catch values per haul and per day (CM 51-06). The authors have used data obtained on-board Russian vessel Komandor Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Svetlana Kasatkina (Fédération de Russie)

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This document provides a proposed model for an annual report on the State of the Environment and Antarctic Marine Living Resources in Area 48 (Scotia Sea) using the period April 2022 to March 2023 as an example time period. We present environmental data on sea ice, sea surface temperature, surface air temperature, chlorophyll-a, climate indices, and iceberg presence Read More
Soumis par:
Claire Waluda (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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The 2024 SKEG annual workshop was held virtually over four days, from 8-11 March 2024, with 108 participants from 22 countries, including ECRs. The number of participants provided a sufficient sample size for polling questions to support CCAMLR in further developing the KSH for their revised krill fishery management approach. 

The purpose of this paper is to inform CCAMLR about the Weddell Sea Observatory of the Biodiversity and Ecosystem Change (WOBEC) project. WOBEC aims to establish a systematic ecosystem monitoring framework in the eastern Weddell Sea that can be used to measure biodiversity and ecosystem change. The WOBEC study area covers parts of the proposed Weddell Sea Read More
Soumis par:
Katharina Teschke (Allemagne)

Approuvé par:
Bettina Meyer (Allemagne)

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The CCAMLR Ecosystem Monitoring Program (CEMP), initiated in 1985, is a circumpolar research initiative aimed at detecting changes in predator populations and distinguishing between those caused by fisheries activities and those caused by environmental variability. This report presents a summary of the data submissions to the CEMP for the 2023/24 monitoring season, organised by site, parameter Read More
Soumis par:
Claire Van Werven (Secrétariat de la CCAMLR)

Approuvé par:
Mariana Cordeiro (Secrétariat de la CCAMLR)

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The Western Antarctic Peninsula (WAP) and Scotia Sea are critical regions of the Southern Ocean, facing increasing human activity through Antarctic krill fisheries, increasing tourism, and pronounced climate change impacts. This study evaluates two management strategies designed to independently safeguard this ecosystem: the proposed Domain 1 Marine Read More
Soumis par:
Elling Deehr Johannessen (Norvège)

Approuvé par:
Bjørn Krafft (Norvège)

Our results provide evidence to suggest that the variability in krill biomass and length distribution in Subarea 48.1 may be largely driven by krill transport processes from the Bellingshausen Sea and the Weddell Sea and the development of the krill fishery management strategy requires adequate data to understand the impact of krill transport on the variability of krill Read More
Soumis par:
Svetlana Kasatkina (Fédération de Russie)

Approuvé par:
Svetlana Kasatkina (Fédération de Russie)

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The transparency and reproducibility of research processes are critical to scientific activities. However, challenges such as data accessibility and interoperability often make data sharing and reuse difficult. This work presents a Galaxy ecoregionalization workflow using the Dumont D'Urville Sea region as a case study. By using R scripts transformed into Read More
Soumis par:
Marc Eléaume (France)

Approuvé par:
Marc Eléaume (France)

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This document presents the draft priority elements for scientific research and monitoring in support of the proposed Weddell Sea Marine Protected Area Phase 2. The priority elements include suggestions from the WSMPA Phase 2 Research and Monitoring Plan (RMP) workshop (Oslo, Norway, 22-26 April 2024). We encourage colleagues to review the material and Read More
Soumis par:
Gary Griffith (Norvège)

Approuvé par:
Bjørn Krafft (Norvège)

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This document presents a summary report of the workshop developing the priority elements for scientific research and monitoring of the proposed Weddell Sea Marine Protected Area ‐ Phase 2 in accordance with CM91-04. The workshop was held in a hybrid form based in Oslo, Norway (23 – 26 April).

The South Orkney Islands Southern Shelf (SOISS) MPA was established in 2009 with the aim of contributing towards the conservation of marine biodiversity in Subarea 48.2, providing a scientific reference area, and conserving important predator foraging areas and representative examples of pelagic and benthic bioregions (CM 91-03). The SOISS MPA was reviewed in 2014 and Read More
Soumis par:
Martin Collins (Royaume-Uni)

Approuvé par:
Martin Collins (Royaume-Uni)

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One site is proposed herein as a VME based on high abundances of VME indicator taxa that fall within the range of previously registered VMEs. The site is off the east coast of Lambda Island, Melchior Islands, Western Antarctic Peninsula. Video imagery was taken via submersible deployed by Seabourn Venture Read More
Soumis par:
Anton Van de Putte (Belgique)

Approuvé par:
Anton Van de Putte (Belgique)

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Chinese krill fishing vessels conducted surveys in Subarea 48.1 during May 2023 and February 2024, covering the Gerlache Strait (GS), Bransfield Strait (BS), Elephant Island (EI), Joinville Island (JI), and the west side of the South Shetland Islands (SSIW). This study compared the length distribution of krill across these regions during winter 2023 and Read More
Soumis par:
Xiu Xia Mu (Chine)

Approuvé par:
Xianyong Zhao (Chine)

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This paper summarizes the Korea research voyage to the Ross Sea region Marine Protected Area (RSRMPA) in March 2023 on IBRV Araon (voyage code ANA14C). The primary goal of this multidisciplinary research expedition was to enhance our understanding of essential environmental and biological Read More
Soumis par:
Jeong-Hoon Kim (Corée, Rép. de)

Approuvé par:
Jaebong Lee

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The objective of the Convention is conservation, and conservation demands that threats to the Antarctic ecosystem are properly monitored and mitigated as necessary. Toxic compounds are an environmental threat with the potential to grow, because many of the elements and chemicals that constitute environmental toxins are often Read More
Soumis par:
Kinga Hoszek (Pologne)

Approuvé par:
Michal Szymanski (Pologne)

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This paper introduces the Murihiku ki Te Tonga – Ross Sea Sector research and monitoring programme (MKTT) launched by the Māori tribe of southernmost New Zealand, Ngāi Tahu ki Murihiku. As the first indigenous-led Antarctic & Southern Ocean research programme in the world, MKTT is developing scientific approaches that are  Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)

Approuvé par:
Mariana Cordeiro (Secrétariat de la CCAMLR)

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The US Antarctic Marine Living Resources (US AMLR) program deployed two Teledyne Webb Research Slocum G3 gliders, each equipped with a suite of oceanographic sensors and newly designed Nortek Signature100 single beam wide-band compact echosounder (70 kHz to 120 kHz). We used these gliders to estimate biomass densities (g m^-2) of Antarctic krill ( Read More
Soumis par:
Christian Reiss (États-Unis d'Amérique)

Approuvé par:
George Watters (États-Unis d'Amérique)

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Baleen whales are likely to play a key role in a krill-centric ecosystem, however CCAMLR has no definitive strategy to monitor them. Addressing this monitoring gap is rapidly becoming a significant challenge, particularly along the western Antarctic peninsula (WAP) and Scotia Sea where there are two management initiatives under consideration in this area. Read More
Soumis par:
Andrew Lowther (Norvège)

Approuvé par:
Bjørn Krafft (Norvège)

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The seasonal transport of krill-like acoustic scattering into western Bransfield Strait, Antarctic Peninsula, was studied during a year-long deployment (December 01, 2022 to December 01, 2023) using a sub-surface mooring array of eight NORTEK Signature100 Acoustic Doppler Current Profilers. Subsurface moorings deployed in Gerlache and Boyd Straits, between Low and Hoseason Read More
Soumis par:
Christian Reiss (États-Unis d'Amérique)

Approuvé par:
George Watters (États-Unis d'Amérique)

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Baleen whales are important consumers of Antarctic krill, migrating from low latitude breeding grounds to their polar feeding areas each austral spring, however the design and establishment of the CCAMLR Ecosystem Monitoring Program (CEMP) in 1989 has not included ongoing monitoring metrics for baleen whales due to the difficulty and expense of Read More
Soumis par:
Andrew Lowther (Norvège)

Approuvé par:
Bjørn Krafft (Norvège)

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Antarctic krill (Euphausia superba) is a keystone species in the Southern Ocean, however, seasonal variation in ovary development of this species kept unclear, especially within a single sector of the Southern Ocean. In this study, a histological study of krill in the south Scotia Sea region was Read More
Soumis par:
Guoping Zhu (Chine)

Approuvé par:
Xianyong Zhao (Chine)

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We investigated the recent spatial variation in the mesozooplankton community on the broad shelf of the RSR MPA during the bloom season. The mesozooplankton community was geographically divided into three regions: the Terra Nova Bay polynya, the Ross Sea polynya, and the marginal polynya. Larval euphausiids were dominant in the two polynya regions, whereas copepods were predominant in Read More
Soumis par:
Jeong-Hoon Kim (Corée, Rép. de)

Approuvé par:
Jaebong Lee

Publication:
Marine Pollution Bulletin, 2024, 204, 116524, https://doi.org/10.1016/j.marpolbul.2024.116524

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Leopard seals (Hydrurga leptonyx) are top predators that can exert substantial top-down
control of their Antarctic prey species. However, population trends and genetic diversity of
leopard seals remain understudied, limiting our understanding of their ecological role. We
investigated the genetic diversity, effective population size and demographic history of leopard
seals to Read More
Soumis par:
Douglas Krause (États-Unis d'Amérique)

Approuvé par:
George Watters (États-Unis d'Amérique)

Publication:
PloS one/2023/ 18:e0284640, 10.1371/journal.pone.0284640

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The existing implementation of a management policy for Antarctic krill fishery has faced challenges due to the diverse and variable management strategies. Understanding the fishing behavior of krill fishery is crucial for developing sustainable policies, and the increasingly developed deep learning may assist the fishing monitoring and fishery management. In this study, Read More
Soumis par:
Guoping Zhu (Chine)

Approuvé par:
Xianyong Zhao (Chine)

Publication:
Fish. Res., August 2024, 276: 107065, doi: https://doi.org/10.1016/j.fishres.2024.107065

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The time series of relative abundance and age structure from the Ross Sea shelf survey provides information about year class strength, variability, and autocorrelation, and hence is an important input into the Ross Sea region toothfish stock assessment. This was the thirteenth survey in the time series and for the first time, the 2024 survey was not Read More
Soumis par:
Nathan Walker (Nouvelle-Zélande)

Approuvé par:
Nathan Walker (Nouvelle-Zélande)

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The integration of available sources of information is a challenge for any attempt to know dynamics populations for Antarctic Krill *Euphausia superba* in an integrated stock assessment model.Being able to identify sources of information, systematize and integrate it in a model and estimate krill population variables in a context of change and fisheries management is vital for Read More
Soumis par:
Mauricio Mardones (Chili)

Approuvé par:
Francisco Santa Cruz (Chili)

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The Western Antarctic Peninsula ecosystem plays a critical role in the cycle life of Antarctic krill (Euphausia superba). Recent environmental changes and increasing exploitation in this area have led to alterations in the structure of the krill population, calling for a review of the management approach. In this study, we derive growth Read More
Soumis par:
Mauricio Mardones (Chili)

Approuvé par:
Francisco Santa Cruz (Chili)

Demander un document de réunion