Search results
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Biomass of myctophids in the Atlantic sector of the Southern Ocean as estimated by acoustic surveys
Abstract: Acoustic surveys carried out in summer and autumn periods of 1987-1989 estimated the ... biomass of myctophids in the Atlantic sector of the Southern Ocean over the region between 48° and 56°S ... and from 8° to 48W at about 1.7 mill.t. Over the larger part of the surveyed area the fish were sparse ... , their dense concentrations composed predominantly of one myctophid species Electrona carlsbergi occurred ...
Meeting Document : WG-FSA-90/19 : Author(s): A.A. Filin, K.V. Gorchinsky and V.M. Kiseleva (USSR)
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Some properties of diagnostics of GLMM model tuning for standardising CPUE indices in the Area 48 using the CCAMLR fishery statistics database
Abstract: The data of krill fishery in Subarea 48 for 1986 – 2008 presented to CAMLR database by ... with random effects (GLMM). The analysis of diagnostics of GLMM tuning indicated that the model with ... Tweedie’s distribution satisfactorily describes the set of data collected in Subareas 48.1, 48.2 and 48.3 ... residuals significantly deviated from the normal distribution. The number of krill hauls, where Pearson’s ...
Meeting Document : WG-EMM-11/44 : Author(s): P. Gasyukov and S. Kasatkina (Russia)
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IDENTIFYING PATTERNS IN DIET OF MACKEREL ICEFISH (CHAMPSOCEPHALUS GUNNARI) AT SOUTH GEORGIA USING BOOTSTRAPPED CONFIDENCE INTERVALS OF A DIETARY INDEX
confidence intervals for an index of relative importance (% IRIDC) of prey categories. Diet varied ... ) fish tended to prey on a higher proportion of T. gaudichaudii and small euphausids such as Thysanoessa ... sp. and took smaller quantities of E. superba. In a season of poor krill availability (summer of 2003 ... -2004) the proportion of krill in the diet, stomach fullness and fish condition (indicated by length ...
Meeting Document : WG-FSA-08/29 : Author(s): C.E. Main, M.A. Collins, R. Mitchell and M. Belchier (UK)
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Aspects of the ecology of the bigeye grenadier at South Georgia
Abstract: Aspects of the ecology of the Bigeye grenadier, Macrourus holotrachys caught as bycatch ... estimates suggest that M. holotrachys is a long lived and moderately slow growing species, reaching ages of ... over 30 years and attaining lengths in excess of 80cm (Lt). Von Bertalanffy growth parameters were ... estimated for females and closely matched those of the congeneic species M. berglax from the Northern ...
Meeting Document : WG-FSA-03/16 : Author(s): S.A. Morley, T. Mulvey, J. Dickson and M. Belchier (United Kingdom)
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Age and growth in length of Micromesistius australis, Norman, 1937 (Pisces, Gadidae), in the southern zone of the Argentine Sea
Abstract: It was carried out the otolith reading of more than 1100 specimens of Micromesistius ... australis, caught in waters of the southern Argentine Sea during the cruises made by the ships Walther ... respectively. For the interpretation of the growth rings, the otoliths were previously subjected to the ... paraffin inclusion and cutting technique. A distribution of length frequencies for each sex was made. A ...
Meeting Document : SC-CAMLR-V/BG/31 : Author(s): Delegation of Argentina
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INTERACTIONS OF PATAGONIAN TOOTHFISH FISHERIES WITH KILLER AND SPERM WHALES IN CROZET EXCLUSIVE ECONOMIC ZONE: AN ASSESSMENT OF DEPREDATION LEVELS AND INSIGHTS ON POSSIBLE MITIGATION SOLUTIONS
longline fishery is exposed to high levels of depredation by killer and sperm whales. In this context, this ... study (i) provides estimations of annual depredation levels on a 5-years period (2003-2008), (ii ... observed on respectively 32.6%, 18.6% and 23.4% of the 4289 lines hauled out over this period. Over this 5 ... year period we estimated a total loss of 1200 tons of Patagonian toothfish due to depredation which ...
Meeting Document : WG-IMAF-09/12 : Author(s): P. Tixier, N. Gasco, G. Duhamel and C. Guinet (France)
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Distribution, biological characteristic and biomass of icefish from the results of inventory trawling survey carried out by STM-8390 Atlantida in January–March 2002
Abstract: Results of the inventory trawling survey of icefish carried out by Russian vessel STM ... foraging. Champsocephalus gunnary 22-28 cm in length at the age of 2-3 predominated on all grounds of the ... Subarea, except the north-eastern part. During the survey, specimens 15 cm in length at the age of 2 ... prevailed in pelagic catches. Peculiarity of Ch. gunnary biology in 2002 consisted in high internal fatness ...
Meeting Document : WG-FSA-02/79 : Author(s): Zh.A. Frolkina and P.S. Gasiukov (Russia)
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Variants of the ASPM assessment of the toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands vicinity which attempt to reconcile CPUE and catch-at-length data
Abstract: Two variants of the ASPM assessment of the Prince Edward Islands toothfish resource are ... examined. One allows for the possibility of changes in somatic growth rate in response to increased food ... -recruitment relationship. A fit of the first variant yields the biologically implausible result of a decrease ... processes. Therefore, unfortunately, neither of the variants examined appears able to resolve the ...
Meeting Document : WG-FSA-SAM-04/12 : Author(s): Brandão, A., Butterworth, D.S.
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The fish fauna of the Argentine Islands region (Antarctica; 12 UAE 2007–2008) and morphometrical changeability of Notothenia coriiceps (Richardson, 1844)
presented. The quantitative indexes of different species fishes and the analysis of their dominant groups ... and morphometrical analyses of two groups Notothenia coriiceps from the Meek-Penola Channel and near ... the west coast of Grotto Island are conducted. It is exposed, that these two groups of fish species ... , except for hepato-somatic. Individuals of both groups’ species of fish had the low indexes of adiposeness ...
Meeting Document : WG-FSA-12/P06 : Author(s): V.N. Trokhymets, V.A. Tymofyeyev and J.S. Perechrest
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Parasites of the Antarctic toothfish (Dissostichus mawsoni Norman, 1937) (Perciformes, Nototheniidae) in the Pacific sector of the Antarctic
Abstract: The Antarctic toothfish (Dissostichus mawsoni Norman, 1937) is one of the main target ... species of commercial fisheries in the Antarctic. It is an endemic and is found along the shelf of ... Antarctica, as well as on the slopes of seamounts, underwater elevations and islands in the sub-Antarctic. It ... feeds on a variety of fish and cephalopods and can be an intermediate/paratenic host of some helminthes ...
Meeting Document : WG-EMM-16/P05 : Author(s): I.I. Gordeev and S.G. Sokolov