Resultados de la búsqueda
-
DEFINING TAG RATES AND TACS TO OBTAIN SUITABLY PRECISE ABUNDANCE ESTIMATES FOR NEW AND EXPLORATORY FISHERIES IN THE CCAMLR CONVENTION AREA
. With respect to the tagging-based abundance estimator, we use the Lincoln-Petersen method and derive a ... formula that gives the expected coefficient of variation of the abundance estimate in terms of the number ... of releases and recaptures, which can in turn be expressed in terms of the tagging rate per tonne ... caught, the catch taken and the postulated underlying exploitable biomass. This relationship is shown to ...
Meeting Document : WG-SAM-08/06 : Autor(es): R.M. Hillary (UK)
-
By-catch of fish during a 1995/96 deep-sea longline experimental fishing cruise off the Kerguelen Islands (Division 58.5.1)
the deep-sea zone (300- 1700 m) off the Kerguelen islands (Division 58-5-1) from February to April ... 1996. The by-catch has been identified with 10 species of fish reaching a important part (36,1%) of the ... total catch in number. The grenadier Macrourus carinatus and two species of skates Bathyraja eatonii and ... Bathyraja irrasa are the dominant species in the by-catch. The morid Antimora rostrata is also a common by ...
Meeting Document : WG-FSA-96/36 : Autor(es): Pruvost, P., Duhamel, G.
-
Entanglement of Antarctic fur seals Arctocephalus gazella in man-made debris at Bird Island, South Georgia during the 1993 winter and 1993/94 pup-rearing season
the fourth consecutive winter and sixth consecutive summer at Bird Island, South Georgia. In the 1993 ... winter the number of entangled seals was only 39% of the record 1992 total, but still 5 times the numbers ... in 1990 and 1991. Nearly all animals were juveniles, half with severe injuries and the proportion of ... females (40%) was the highest yet reported. The proportion of animals entangled in packaging bands was the ...
Meeting Document : SC-CAMLR-XIII/BG/03 : Autor(es): Delegation of United Kingdom
-
Analysis of variables influencing finfish by-catch in the krill fishery in Area 48
Abstract: This report presents the results of a method used to explore potential explanatory ... variables influencing finfish bycatch in the krill fishery of Area 48. Records of finfish bycatch in the ... Area 48 krill fishery collected by observers on the FV Saga Sea were analysed over the period 2007/08 ... -2011/12. The majority of fish caught were either small juveniles or larvae, dominated by Myctophidae ...
Meeting Document : WG-EMM-12/28 : Autor(es): S.M. Martin, T. Peatman, J. Moir Clark (United Kingdom), O.R. Godø (Norway) and R.C. Wakeford (United Kingdom)
-
Further development of coarse- and medium-scale spatially explicit population dynamics operating models for Antarctic toothfish in the Ross Sea region
operating models for Antarctic toothfish in the Ross Sea. The operating models consider both a coarse-scale ... and medium-scale spatial resolution and consider scenarios where abundance can be present over the ... entire Ross Sea region or restricted to areas where the fishery has operated. The models are implemented ... in the generalised Bayesian population dynamics model, the Spatial Population Model (SPM). The SPM ...
Meeting Document : WG-FSA-12/44 : Autor(es): S. Mormede, A. Dunn, S. Parker and S. Hanchet (New Zealand)
-
Stable isotope analysis of tissue samples to investigate trophic linkages of Antarctic toothfish (Dissostichus mawsoni) in the Ross and Amundsen Sea regions
(Dissostichus mawsoni) muscle were measured to study the trophic connections of Antarctic toothfish in the Ross ... analysed, but only from the Ross Sea region. Appropriate corrections were made to account for the effect of ... lipid in muscle on δ 13 C in a way that did not compromise the accuracy of δ 15 N measurements. We found ... level; (2) δ 15 N values of toothfish on the Ross Sea slope were lower (~0.8‰ between medians) than in ...
Meeting Document : WG-EMM-14/50 : Autor(es): M.H. Pinkerton, S.J Bury, J.C.S. Brown, J. Forman and A. Kilimnik (New Zealand)
-
A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997–98 to 2014–15
Abstract: This report summarises the timing, depth, and location of fishing effort together with ... biological characteristics of the catch of Antarctic toothfish up to and including the 2015 season. In 2015 ... , the Ross Sea slope SSRUs were significantly constrained by sea ice and catches were unevenly ... distributed across the three SSRUs (73% in 88.1H, 22% in 88.1K and 5% in 88.1I). As in recent years, the ...
Meeting Document : WG-FSA-15/36 : Autor(es): K. Large, S.M. Hanchet and S. Mormede (New Zealand)
-
Performance metrics to index the spatial coverage of mark-recapture data
Abstract: Understanding the spatial distribution of the release of tagged fish and the subsequent ... interpreting the biomass estimated from mark recapture data. In 2015, the Scientific Committee identified that ... measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... new biomass-weighted spatial overlap summary statistics for tagging data. The method calculates two ...
Meeting Document : WG-SAM-16/13 : Autor(es): C. Marsh, A. Dunn and S. Mormede
-
China’s plan for marine investigation and assessment in the East Antarctic sector
Abstract: Given the large scale and hostile condition of the Southern Ocean, which accounts for ... almost 10% of the world ocean, the collection of scientific data and information in support of effective ... recommendations and advice for management, the SC-CAMLR is mandated to encourage and promote cooperation in the ... field of scientific research in order to extend knowledge of the marine living resources of the ...
Meeting Document : CCAMLR-38/BG/53 : Autor(es): Delegation of the People’s Republic of China
-
Entanglement of Antarctic fur seals (Arctocephalus gazella) by man made debris at Bird Island, South Georgia, during the 2005 winter and 2005/06 breeding season
Abstract: Results of the survey of entanglements of Antarctic fur seals at Bird Island, South ... Georgia for the sixteenth consecutive winter (2005) and eighteenth consecutive summer (2005/06) are ... reported here. Two entanglements were observed in the winter, a decrease of 60% from the previous year, and ... the lowest number seen since records began in 1990. One of these involved a male pup entangled in ...
Meeting Document : SC-CAMLR-XXV/BG/13 : Autor(es): Delegation of the United Kingdom