Search results
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Indexing maturation of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea region
fish developing to spawn in the upcoming season. Evidence is accumulating that almost all Antarctic ... in the upcoming season. Observations of post-spawning fish on the slope indicate that some females either spawn ... on the slope or return to the slope in early spring. The absence of high condition fish in the north indicate ... that any northward migration occurs in late autumn or winter. Determination of fish movement during ...
Meeting Document : WG-FSA-12/40 : Author(s): S. Parker and P. Marriott (New Zealand)
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Diet of two icefish species from the South Shetland Islands and Elephant Island, Champsocephalus gunnari and Chaenocephalus aceratus 2001–2003
mainly krill, mysids and fish. Among the fish taken, locally abundant species formed the bulk of the diet ... in 2003. An ontogenetic shift in feeding preference of C. aceratus was observed: Fish smaller than 30 cm ... fed on krill and mysids, while larger animals relied primarily on fish. Author(s): H. Flores ... and fish. Among the fish taken, locally abundant species formed the bulk of the diet. They were ...
Meeting Document : WG-FSA-03/61 : Author(s): H. Flores, K.-H. Kock, S. Wilhelms (Germany) and C.D. Jones (USA)
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Age-length key for Champsocephalus gunnari from Subarea 48.3, Dr Eduardo Holmberg survey, February/March 1994
sized fish (total length 12-33 cm) constituted the bulk of the samples (93%), while larger specimens ... (>33 cm) were scarce. At South Georgia, fish of age groups 1-4 were truly represented; at Shag Rocks ... , a large concentration of fish belonging to age groups 2 (90%) and 3 (10%) was found. The length weighted ... distribution of all the fish sampled in the Subarea 48.3 showed good correspondence between modes and, the mean ...
Meeting Document : WG-FSA-94/11 : Author(s): E. Barrera-Oro, E. Marschoff and R. Casaux (Argentina)
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Preliminary examination of otolith microchemistry to determine stock structure in Antarctic toothfish (Dissostichus mawsoni) between SSRU 88.1C and 88.2H
evaluated using otolith microchemistry techniques. Our aims were to (i) determine whether fish from ... was shown. This resulted in the correct classification of 63% of fish overall to their original capture ... success (79%), compared to the otolith edge which suggested the majority of fish from SSRU 88.1C and 88.2H ... in total 83% of fish from both SSRU 88.1C and 88.2H to 88.1C. The remaining group consisted entirely ...
Meeting Document : WG-SAM-14/33 : Author(s): R. Tana, B.J. Hicks, C. Pilditch and S.M. Hanchet (New Zealand)
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Geographical variation in the diet of the Antarctic fur seal Arctocephalus gazella
frequent (except at Cierva Point) and numerous prey at all the study sites, being followed by fish ... , penguins and cephalopods. The Antarctic krill also predominated by mass being followed by fish or penguins ... . Fish were the second most important prey by mass at the Antarctic Peninsula whereas penguins were ... at the South Shetland and South Orkney islands. Among fish, Pleuragramma antarcticum was the species that most ...
Meeting Document : WG-EMM-02/10 : Author(s): R. Casaux, A. Baroni, F. Arrighetti, A. Ramón and A. Carlini (Argentina)
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Effect of a shore-based sampling program on Notothenia coriiceps populations
at two close but not previously sampled zones (sites 2 and 3). The fish were caught with trammel nets ... in length (TL) of the fish was observed throughout the whole period. The fish from sites 2 (x=32.4 cm ... not due to a natural decrease of the proportion of larger fish in the population, but related ... but not previously sampled zones (sites 2 and 3). The fish were caught with trammel nets under similar sampling ...
Meeting Document : WG-FSA-99/24 : Author(s): R. Casaux and E. Barrera-Oro (Argentina)
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Preliminary results of a feeding trial on the blue-eyed shag Phalacrocorax atriceps
Abstract: Local fish species were used to feed a captive blue-eyed shag Phalacrocorax atriceps ... . The otoliths identified in pellets were affected by the digestive process and consequently the fish species ... the accuracy of weight estimations of fish ingested, calculated y means of equations based on otolith-lengths ... the fish stomachs. Therefore, their importance in the diet of the blue-eyed shag could have been ...
Meeting Document : WG-CEMP-94/29 : Author(s): R. Casaux, M. Favero, E. Barrera-Oro and P. Silva (Argentina)
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A preliminary assessment of age and growth of eel cod (Muraenolepis sp.) and violet cod (Antimora rostrata) in the Ross Sea, Antarctica
, the otoliths are quite difficult to interpret, and the sampled fish do not represent the full length or sex ... distributions of the populations (i.e., small fish and males were absent). The Muraenolepis samples were ... years. Von Bertalanffy parameters derived from female and unsexed fish only are: L., 42.8 cm TL ... years. Von Bertalanffy parameters derived from female and unsexed fish only are: L., 78.4 cm TL ...
Meeting Document : WG-FSA-10/19 : Author(s): P.L. Horn and C.P. Sutton (New Zealand)
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Peculiarities of icefish Champsocephalus gunnari (Channichthyidae) distribution in South Georgia area during the surveys made by STM Atlantida in 2000 and 2002
in the northwest shelf area in 10-100m layer resulted in formation of adult fish aggregations in water column ... the bottom even in dark hours of the day. During the two surveys, fry and immature fish occurred in numbers ... in pelagic zone. At present, the population mainly consists of immature and first maturing fish, which stay ... , consequently, is disregarded when estimating the TAC. Diverse size groups, mainly juvenile and immature fish ...
Meeting Document : WG-FSA-03/55 : Author(s): Zh.A. Frolkina, S.M. Kasatkina and N.N. Zhigalova (Russia)
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GROUNDFISH SURVEY IN CCAMLR SUB-AREA 48.3 IN APRIL 2008 WITH PRELIMINARY ASSESSMENT OF MACKEREL ICEFISH
by 2+ and 3+ fish, with differences in the size between Shag Rocks and South Georgia and with few small fish ... the 1+ fish produced yield of 3445 tonnes in Year 1 (2008/09) and 2318 tonnes in Year 2 (2009/10). In Scenario ... 2, in which the 1+ fish were excluded and biomass adjusted accordingly, yields were 3372 and 2248 tonnes ... . There was evidence that the September 2007 survey under sampled the 2+ fish, meaning that September is not an ideal ...
Meeting Document : WG-FSA-08/28 : Author(s): M.A. Collins, R.E. Mitchell, C.E. Main, J. Lawson, J. Watts, J. Slakowski, L. Featherstone and O. Rzewuski (UK)