Résultats de la recherche
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First increment validation of Patagonian toothfish (Dissostichus eleginoides) from Heard Island
represent annual events, no direct validation has been provided for the early growth of this species. In an ... attempt to determine the position of first increment formation daily increments in 7 sagittal otoliths ... the ventral side of the otolith section was 0.630mm. This is consistent with the measurements in ... one opaque and one translucent increment is formed each year on the sectioned face of sagittal ...
Meeting Document : WG-FSA-05/61 : Auteur(s): K. Krusic-Golub, C. Green and R. Williams (Australia)
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Breeding and post-breeding foraging locations of Adélie penguins at Hope Bay/Esperanza, Antarctic Peninsula
/Esperanza, during the late part of the breeding season and their subsequent post breeding dispersal in two ... feeding area for Adélie penguins breeding in the tip of the Antarctic Peninsula. Author(s): M.M. Santos ... Abstract: We compare the diet and the foraging distribution of Adélie penguins at Hope Bay ... krill fishery activity at spatial and temporal scale. During both seasons, the bulk of the diet was ...
Meeting Document : WG-EMM-14/42 : Auteur(s): M.M. Santos (Argentina), P.N. Trathan (UK), S. Thanassekos (Secretariat), E.F. Rombolá, M.A. Juáres (Argentina), K. Reid (Secretariat) and J.T. Hinke (USA)
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Histopathology of Antarctic krill, Euphausia superba, bearing black spots
superba, since January, 2001. To study the nature of the black spots, the krill were sampled in the winter ... of 2003, 2006, and 2007 in the South Georgia region, the Antarctic Ocean. Histological observations ... bacteria or amorphous material. In the 2007 samples, 42% of the krill had melanized nodules. Most of the ... Abstract: Small black spots have been noticed on the cephalothorax of Antarctic krill, Euphausia ...
Meeting Document : WG-EMM-08/P09 : Auteur(s): S. Miwa, T. Kamaishi, T. Matsuyama, T. Hayashi and M. Naganobu
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Do Adélie penguin fledgling weights provide an index of prey availability?
crèche stages of the breeding season. In some seasons, there appeared to be constant levels of resources ... associated truncation of the distribution in poor seasons for seabirds with prolonged chick-rearing periods ... the demographic consequences of variable fledgling weights in terms of subsequent chick survival for ... as strong for the crèche foraging trips later in the season. Fledgling weights which are measured at ...
Meeting Document : WG-EMM-05/21 : Auteur(s): L. Emmerson, C. Southwell and J. Clarke (Australia)
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Growth per molt of male snow crab Chionoecetes opilio from Conception and Bonavista Bays, Newfoundland
, Newfoundland, in order to estimate the increase in size at the time of molting. Ninety-two animals were ... recaptured which had usable information on growth increments. Based on the amount of growth, we hypothesized ... that 20 of these had molted once while the remainder molted twice. Two lines of evidence support this ... interpretation. First, animals in the group presumed to have molted twice were at liberty on average twice as ...
Meeting Document : WS-CRAB-93/12 : Auteur(s): D.M. Taylor and J.M. Hoenig (USA)
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ENVIRONMENTAL FORCING AND SOUTHERN OCEAN MARINE PREDATOR POPULATIONS: EFFECTS OF CLIMATE CHANGE AND VARIABILITY
potentially the location where the most rapid climate change is most likely to happen, particularly in the ... include changes to the long interdecadal background signals such as the development of the El Niño ... best predictor of biological responses over longer time-scales. Around the Southern Ocean, marine ... predator populations show periodicity in breeding performance and productivity, with relationships with the ...
Meeting Document : WG-EMM-08/P06 : Auteur(s): P.N. Trathan, J. Forcada and E.J. Murphy
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Diet composition of Antarctic toothfish
muscle tissue of Antarctic toothfish, bycatch specimen and icefish in the stomachs indicated a trophic ... connection between the toothfish and icefish. In this study, similarities in the δ13C values δ15N values of ... Abstract: To identify the important prey items for pre-recruit Antarctic toothfish in the SSRUs ... fishing vessel. In the previous studies, similarities in total FA compositions and the FA profiles in ...
Meeting Document : WG-FSA-16/06 : Auteur(s): Delegation of the Republic of Korea
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Predicting distribution and relative abundance of mid-trophic level organisms using oceanographic parameters and acoustic backscatter
Abstract: Data on the distribution and abundance of mid-trophic level organisms (MTLOs) in the ... predicted backscatter reasonably well in the Pacific sector of the SO, and in an independent dataset in the ... distribution of MTLOs in other parts of the SO. Author(s): P.C. Escobar-Flores, R.L. O’Driscoll and J.C ... proxy for MTLO abundance in the epi- and mesopelagic zones. Boosted regression trees and generalised ...
Meeting Document : WG-EMM-18/P07 : Auteur(s): P.C. Escobar-Flores, R.L. O’Driscoll and J.C. Montgomery
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Laboratory target strength measurements of free swimming Antarctic krill (Euphausia superba)
enabling the estimation of threshold induced bias in the target strength estimates. The threshold induced ... were in the range of [-0.84,-0.33] dB. An error analysis of the target strength estimates detailing the ... single animal insonifications. For mean length classes in the range [29.6, 36.2] mm the median single ... freely in the tank triggering the data acquisition system when generating a back scattered signal larger ...
Meeting Document : WG-EMM-97/75 : Auteur(s): Pauly, T., Penrose, J.D.
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A simulation study of krill fishing by an individual Japanese trawler
response of the index, or a response rather smaller in relative magnitude than the biomass decline. Catch ... confidence will warrant being placed in the results from a simulation model of the fishery. Author(s): D.S ... Abstract: A model is set up for the operation (which includes both searching and fishing) of a ... Japanese krill trawler over a half-month period, and the output is compared to statistics from a sample of ...
Meeting Document : SC-CAMLR-VI/BG/38 : Auteur(s): D.S. Butterworth (United Kingdom)