Resultados de la búsqueda
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Indicative trends in by-catch of sharks in the CAMLR Convention Area
comparison of data from vessels vs. scientific observers. This paper provides information that could be ... Abstract: Conservation Measure 32-18 on the conservation of sharks specifies that “directed ... .” Further, that “any by-catch of sharks shall, as far as possible, be released alive.” Here, we examine ... increased during the last 10-year period, with most of the by-catch reported in Division 58.5.2 and ...
Meeting Document : WG-FSA-18/63 Rev. 1 : Autor(es): C.D. Jones
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Ageing two myctophid fishes using otolith from king and macaroni penguins in the Marion Island and its implication to feeding preference of penguins on those myctophids
distributed biological resources in the Antarctic waters, which are the important food sources of top ... predators, particularly penguins. However, the information on age of those fishes are very limited and ... of myctophids in the Antarctic ecosystem. Using the otolith samples collected from King and Macaroni ... penguins in the Marion Island, the present study examined the age determination and precision of age ...
Meeting Document : WG-FSA-18/74 : Autor(es): M. Duan, G.P. Zhu, A. Makhado and L. Wei
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The Continuous Plankton Recorder in the Southern Ocean: a comparative analysis of zooplankton communities sampled by the CPR and vertical net hauls along 140°E
Abstract: A repeat transect was run south of Tasmania, along ~140°E, during November and December ... each of 19 stations: 0–20, 20–50, 50–100 and 100–150 m. A Continuous Plankton Recorder (CPR) was ... . Zooplankton in the top 150 m of the water column demonstrated strong, small-scale, vertical distribution ... , indicating that all communities had a similar distribution of abundance amongst species. There was little ...
Meeting Document : WS-BSO-07/P5 : Autor(es): Hunt, B.P.V and G. Hosie
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An assessment of toothfish in Subarea 48.3 using CASAL
Abstract: The CASAL software has been successfully applied to an assessment of the stock of ... , with an extensive range of sensitivity tests and examination of diagnostics. A baseline assessment ... 45,893 t, and the spawning stock biomass was estimated to be 120,360 t, around 67% of its unexploited ... 49,943 t, and the spawning stock biomass was estimated to be 100657 t, some 64% of its unexploited level ...
Meeting Document : WG-FSA-05/16 : Autor(es): R.M. Hillary, G.P. Kirkwood and D.J. Agnew (United Kingdom)
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Milk fatty acid signatures indicate both major and minor shifts in foraging ecology of lactating Antarctic fur seals
Abstract: Fatty acid signature analysis is based on the conservation and unique signatures of ... fatty acids in the marine food chain and it may be useful in determining the composition of seal diets ... perinatal fast are derived largely from blubber mobilization and thus likely resemble an integration of ... the lactation period. To compare groups, we used methods of classification and regression tree (CART ...
Meeting Document : WG-EMM-97/14 : Autor(es): Boyd, I.L., Iverson, S.J., Arnould, J.P.Y.
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Using production models to assess the stock of Paralomis spinosissima around South Georgia Island
Abstract: Four production models were fit to a time series of daily catch per unit effort (CPUE ... recruitment function. The best fitting model was Model 1. Model 1 had three parameters: an estimate of initial ... abundance (N0), an estimate of the scaling coefficient relating abundance to CPUE (q), and a recruitment ... removals should not be greater than the number of crabs that recruit to the fishery during the course of a ...
Meeting Document : WG-FSA-93/23 : Autor(es): George Watters (USA)
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Microincrement analysis in otoliths of Notothenia rossii fingerlings from the South Shetland Islands to estimate early life history timings and to validate annulus formation
phase fingerlings selected from a total sample of 364 early juveniles caught mainly in summer from 2003 ... date of capture showed two main periods of larval hatching separated by 5-6 months, one in late summer ... , indicating a timing of demersal settlement of about eight months from hatching. The age/length frequency ... distribution of fish sampled in spring 2010 showed the simultaneous presence of two different cohorts ...
Meeting Document : WG-FSA-12/04 : Autor(es): E. Barrera-Oro (Argentina) and M. La Mesa (Italy)
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A spatially explicit population dynamics operating model for Antarctic toothfish in the habitable depths of the Ross Sea region
% of the depth is deemed suitable as habitat for toothfish (120 cells – semi-restricted model), and ... – restricted model) or allowed to occupy the entire Ross Sea region including depths outside of those normally ... about the distribution of toothfish in areas where no fishing has occurred, such that the unrestricted ... model estimates fish movements into cells outside of the fished area including those with implausible ...
Meeting Document : WG-FSA-13/53 : Autor(es): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
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A REVIEW OF THE METHODS USED TO RELEASE SKATES (RAJIIDS), WITH OR WITHOUT TAGS, IN ANTARCTIC EXPLORATORY FISHERIES
line by cutting snoods, and when practical, removing the hooks’. This paper documents the evolution of ... from this programme showing an unquantifiable degree of the survivorship of returned skates, the CCAMLR ... implemented was that some form of in-water release would be the ideal to improve survival chances ... . Subsequently a number of problems have become evident with this method. The Working Group on Fish Stock ...
Meeting Document : WG-FSA-08/30 : Autor(es): J.M. Fenaughty (New Zealand)
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OCCURRENCE OF DWARF MINKE WHALES (BALAENOPTERA ACUTOROSTRATA SUBSP) AROUND THE ANTARCTIC PENINSULA
Abstract: The occurrence of dwarf minke whales (Balaenoptera acutorostrata subsp.) around the ... Antarctic Peninsula was examined based on 406 sightings of minke whales recorded during the Chilean ... Antarctic Scientific Expeditions and other opportunistic cetacean surveys. Identification of the species was ... made only for the whales sighted in the proximity of the vessels when the specific diagnostic ...
Meeting Document : WG-EMM-11/P2 : Autor(es): J. Acevedo, C. Olavarría, J. Plana, A. Aguayo-Lobo, A. Larrea and L.A. Pastene