Search results
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Surface exchange between the Weddell and Scotia Seas
Abstract: Within Drake Passage, the southern flank of the Antarctic Circumpolar Current (ACC ... ) hosts the ventilation of deep water, the injection of Antarctic shelf waters and interactions between ... westward and eastward boundary cur rents. This exchange is explored through the trajectories of forty ... transport pathways between the eastern Antarctic Peninsula and sites of elevated chlorophyll in the Scotia ...
Meeting Document : WG-EMM-14/P03 : Author(s): A.F. Thompson and M.K. Youngs
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Fish by-catch in the krill fishery: 2018 update
) and CCAMLR SISO data (17 455 hauls) up to 20 Sept 2018 was used to examine the frequency of occurrence ... , length-frequency distribution and geographic provenance of the key fish taxa reported. There is an ... increase in the data quality from the observer scheme and an increase in the frequency of fish bycatch in ... the commercial krill fishery catch data. As in previous years there was a high degree of overlap in ...
Meeting Document : WG-FSA-18/10 : Author(s): CCAMLR Secretariat
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Habituation to an acoustic harassment device (AHD) by killer whales depredating demersal longlines
fisheries that suffer significant losses caused by odontocete depredation. However, the efficacy of AHDs to ... deter odontocetes from fishing gear remains poorly investigated. To determine the effectiveness of AHDs ... distances of 29 killer whales from the vessel (n = 1,812 records) were collected during 45 phases of AHD ... insignificant behavioural response to further activations of the AHD. When tested through Generalized Linear ...
Meeting Document : WG-FSA-14/P04 : Author(s): P. Tixier, N. Gasco, G. Duhamel and C. Guinet
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Revised research plan for the exploratory longline fishery for Dissostichus spp. in Division 58.4.2 in 2014/15
Abstract: Most things related to Dissostichus spp. in the eastern side of Antarctic has not been ... sizes were vulnerable with a big range of about 100-1,500 t per SSRU in 58.4.2. During the 2004-2014 ... get more recapture. The food-web of Dissostichus spp. has started to be studied in the southern Ross ... Sea and 58.4.1C. Some studies on biology of the fish have been evaluated, but those are not enough to ...
Meeting Document : WG-FSA-14/39 : Author(s): Delegation of the Republic of Korea
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Fishing for structure; can we describe normal patterns in toothfish fishing operations using catch and effort data?
toothfish in CCAMLR fisheries and link those steps to the variables recorded as part of the CCAMLR catch and ... effort data reporting system. We then describe statistical properties of the recorded variables and how ... more difficult to evaluate given the wide range of influences that may affect recorded values for a ... given parameter. There are strong functional relationships identified between some of the variables. For ...
Meeting Document : WG-FSA-16/36 : Author(s): J.M. Fenaughty and K. Large
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Proposal for a longline survey on toothfish in Statistical Subarea 48.6 in 2017/18
patterns and improve estimation of population characteristics and thereby contribute to the development of ... spatial population models and assessments in support of management advice. Additional outcomes of the ... research relate to mapping the bathymetry of the fishable area, documenting relative abundance of ... , and collecting information on distribution, relative abundance, and life history of bycatch species ...
Meeting Document : WG-FSA-17/61 Rev. 1 : Author(s): Delegation of Norway
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Revised proposal for the ongoing research plan on Patagonian toothfish (Dissostichus eleginoides) in Division 58.4.4b (2016/17–2020/21)
and WG-FSA-16/33 Rev. 1) for a period of 5 years. The proposal submitted here has been substantially ... part of 58.4.4b_2 (WG-FSA-18/23) and a new French vessel has joined the research plan to increase ... -19, while the main concerns regarding objective 2 (“ Provide an assessment of the status and ... productivity of Patagonian toothfish stock ”) and 5 (“ Contribute to scientific research programs on killer ...
Meeting Document : WG-FSA-2019/64 : Author(s): Delegations of Japan and France
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Temporal variability in Antarctic marine ecosystems: periodic fluctuations in the phocid seals
Abstract: Three species of seals around Antarctica have shown quasi-cyclic patterns in some ... aspect of their biology: the age structure of crabeater seals (Lobodon carcinophagus) around the ... and with the Southern Oscillation Index (SOI). All of the seal data sets showed evidence of cyclical ... behavior when demodulated at a period of 5 yr. The Weddell seals were generally in phase with the SOI since ...
Meeting Document : WG-CEMP-91/13 : Author(s): J.W. Testa, G. Oehlert, D.G. Ainley, J.L. Bengtson, D.B. Siniff, R.M. Laws and D. Rounsevell (USA)
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Squeezed from both ends: Decline in Antarctic fur seals in the South Shetland Islands driven by both Top–down and Bottom–up processes
Abstract: Understanding the relative contributions of different sources of mortality and survival ... in predator populations can improve ecosystem models and management of marine ecosystems. Within the ... . This has led to an under emphasis of the role of bottom-up drivers for controlling fur seal production ... provided as an indicator of bottom-up drivers and we contrast these with early season neonate mortality and ...
Meeting Document : WG-EMM-14/39 : Author(s): M.E. Goebel and C.S. Reiss (USA)
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Proposal for a longline survey on toothfish in Statistical Subarea 48.6 in 2017/18
improve estimation of population characteristics and thereby contribute to the development of spatial ... population models. Additional outcomes of the research relate to mapping the bathymetry of the fishable area ... , documenting relative abundance of Patagonian and Antarctic toothfish, tagging toothfish for biomass estimation ... life history of bycatch species. Author(s): Delegation of Norway Title: Proposal for a longline ...
Meeting Document : WG-SAM-17/06 : Author(s): Delegation of Norway