Résultats de la recherche
-
A preliminary investigation of the possible effects of rhizocephalan parasitism on the management of the crab fishery around South Georgia
Paper Title: A preliminary investigation of the possible effects of rhizocephalan parasitism on ... levels of infection by a rhizocephalan barnacle have been found in the population of the crab Paralomis ... spinosissima, which has been harvested by a new fishery around South Georgia (Subarea 48.3) since 1992. One of ... possible implications of parasitism for management are investigated by considering a population model that ... CCAMLR Science, Vol. 1: 175-192 A PRELIMINARY ... Relatively high levels of infection by a rhizocephalan barnacle have been found in the population of the ... crab Paralomis spinosissima, which has been harvested by a new fishery around South Georgia (Subarea ... considering a population model that captures the main characteristics of the system. An age-based host ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 175–192 : Auteur(s): Basson, M
-
A statistical method for estimating the level of IUU fishing: application to CCAMLR Subarea 48.3
Paper Title: A statistical method for estimating the level of IUU fishing: application to CCAMLR ... Subarea 48.3 Abstract / Description: This paper describes a new method for estimating illegal ... ’ and ‘unseen’ IUU fishing by using a simulation model to arrive at statistically rigorous estimates of ... there must have been at least one encounter with an FPV in a year; no encounters in a year are ... . 12 (2005): 119–141 119 A STATISTICAL METHOD FOR ESTIMATING THE LEVEL OF IUU FISHING: APPLICATION ... paper describes a new method for estimating illegal, unregulated and unreported (IUU) catches of fi sh ... ) cruise data. The method takes explicit account of both ‘seen’ and ‘unseen’ IUU fi shing by using a ... encounter with an FPV in a year; no encounters in a year are interpreted as zero IUU fi shing. For each IUU ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 119–141 : Auteur(s): Agnew, D.J. and G.P. Kirkwood
-
A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship in Subarea 48.3
Paper Title: A study of Patagonian toothfish (Dissostichus eleginoides) post-tagging survivorship ... , fish with a variety of injuries were selected to see if this affected recovery. In the final analysis ... initial condition had a higher survivorship than large animals and those in poor condition. The results ... suggest that experienced observers using animals in good condition would normally achieve a toothfish post ... CCAMLR Science, Vol. 13 (2006): 279–289 279 A ... seawater replacement for at least 12 hours after tagging. On one vessel, fish with a variety of injuries ... an overall survivorship of 90%. Smaller animals and animals in better initial condition had a higher ... using animals in good condition would normally achieve a toothfish post-tagging survivorship of 95% or ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 279–289 : Auteur(s): Agnew, D.J., J. Moir Clark, P.A. McCarthy, M. Unwin, M. Ward, L. Jones, G. Breedt, S. Du Plessis, J. Van Heerdon and G. Moreno
-
Distribution and relative abundance of juvenile icefish (Champsocephalus gunnari) from a trawl survey of the South Georgia shelf in June–July 1985
) from a trawl survey of the South Georgia shelf in June–July 1985 Abstract / Description: A trawl ... mile protected zone around South Georgia to the 500 m isobath were sampled with a specially designed ... waters of 100–200 m depth. A typical pattern of diurnal vertical migration of fish was observed. To ... obtain a more complete data set, it is recommended that future surveys should cover shallower water areas ... ABUNDANCE OF JUVENILE ICEFISH (CHAMPSOCEPHALUS GUNNARI) FROM A TRAWL SURVEY OF THE SOUTH GEORGIA SHELF IN ... JUNE-JULY 1985 V.A. Boronin, G.P. Zakharov, V.P. Shopov (U.S.S.R.) Abstract A trawl survey of ... mile protected zone around South Georgia to the 500 m isobath were sampled with a specially designed ... waters of 100-200 m depth. A typical pattern of diurnal vertical migration of fish was observed. To ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 55-63 : Auteur(s): Boronin, V.A., G.P. Zakharov and V.P. Shopov
-
Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach
Paper Title: Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda ... development of a new fishery for the ommastrephid squid Martialia hyadesi in the Scotia Sea, this paper ... presents a revision of annual consumption of the species by higher predators and provides a brief review of ... consumption data because comprehensive sampling can be carried out during their breeding seasons. A ... MEASURES FOR A NEW FISHERY ON MARTIALIA HYADESI (CEPHALOPODA, OMMASTREPHIDAE) IN THE SCOTIA SEA: AN ... United Kingdom Abstract In anticipation of the development of a new fishery for the ommastrephid ... squid Martialia hyadesi in the Scotia Sea, this paper presents a revision of annual consumption of the ... species by higher predators and provides a brief review of information about the life cycle and ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Auteur(s): Rodhouse, P.G
-
A simulation study of the method of deriving natural mortality rate using data for Champsocephalus gunnari in Subarea 48.3
Paper Title: A simulation study of the method of deriving natural mortality rate using data for ... Champsocephalus gunnari in Subarea 48.3 Abstract / Description: A method of determining the rate of natural ... mortality, based on the construction of a regression between the rate of annual fishing mortality ... described method is sound. When a mistake is made in the choice of natural mortality coefficient, the ... WG-FSA-91/2S A SIMULATION STUDY OF THE METHOD OF ... and R.S. Dorovskikh* * Abstract A method of determining the rate of natural mortality, based on ... the construction of a regression between the rate of annual fishing mortality (determined by VPA ... method is sound. When a mistake is made in the choice of natural mortality coefficient, the estimate of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 69–83 : Auteur(s): Gasyukov, P.S. and R.S. Dorovskikh
-
Commercial fishing vessels as research vessels in the Antarctic – requirements and solutions exemplified with a new vessel
solutions exemplified with a new vessel Abstract / Description: The climate-induced changes presently seen ... in the ecosystems of the Antarctic region require a precautionary approach with respect to the human ... various tasks and required instrumentation are presented and discussed. To illustrate this concept a ... description of a Norwegian krill fishing vessel now under construction is presented. This type of combined ... a result of ice reduction (Flores et al., 2012a; Flores et al., 2012b; Melbourne-Thomas et al ... ., 2013). Krill plays a key role in Antarctic marine ecosystems (Siegel, 2010). The combined impact of ... – requIrements and solutIons exemplIfIed wIth a new vessel O.R. Godø* Institute of Marine Research PO Box ... presently seen in the ecosystems of the Antarctic region require a precautionary approach with respect to ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 11–17 : Auteur(s): Godø, O.R., C. Reiss, V. Siegel, J.L. Watkins
-
A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age data and compared to observed growth from mark–recapture studies
Paper Title: A von Bertalanffy growth model for toothfish at Heard Island fitted to length-at-age ... using a von Bertalanffy (VB) growth model taking into account response-biased sampling of fish that were ... used length-bin sampling involving a fixed sample size per bin. Estimation of the VB parameters used a ... selectivity alone. This was due to the feature of the selectivity function of a sharp decline from ‘full ... (2007): 43–66 43 A VON BERTALANFFY GROWTH MODEL FOR TOOTHFISH AT HEARD ISLAND FITTED TO LENGTH-AT-AGE ... fi tted using a von Bertalanffy (VB) growth model taking into account response-biased sampling of fi ... sh for ageing used length-bin sampling involving a fi xed sample size per bin. Estimation of the VB ... parameters used a defi nition of the likelihood function based on variable probability (VP) sampling due to ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 43–66 : Auteur(s): Candy, S.G., A.J. Constable, T. Lamb and R. Williams
-
A first step towards modelling the krill–predator dynamics of the Antarctic ecosystem
Paper Title: A first step towards modelling the krill–predator dynamics of the Antarctic ... hypothesis of a krill surplus in the mid-20th century is described, and the information on population and ... population trends without the need for recourse to environmental change hypotheses. A model is developed ... former. A reference case and six sensitivities are fitted to available data on predator abundances and ... CCAMLR Science, Vol. 13 (2006): 217–277 217 A ... emphasised. The background to the hypothesis of a krill surplus in the mid-20th century is described, and ... environmental change hypotheses. A model is developed including krill, four baleen whale (blue, fin, humpback ... Southern Ocean in view of the much larger past harvests in the former. A reference case and six ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 217–277 : Auteur(s): Mori, M. and D.S. Butterworth
-
Protecting young fish and spawning aggregations of Champsocephalus gunnari in Subarea 48.3 (South Georgia): a review
Subarea 48.3 (South Georgia): a review Abstract / Description: The need to protect young fish and ... , and a strategy for the future protection of young fish and spawning aggregations of C. gunnari in ... Subarea 48.3 is considered. This comprises a combination of existing measures, including minimum mesh size ... and fish size, and a proposed new closed season from 1 March to 31 May. File: 04parkes.pdf ... FISH AND SPAWNING AGGREGATIONS OF CILAMPSOCEPHALUS G U W A R I IN SUBAREA 48.3 (SOUTH GEORGIA): A ... are re-examined in the light of new information, and a strategy for the future protection of young ... fish and spawning aggregations of C. gunnari in Subarea 48.3 is considered. This comprises a ... combination of existing measures, including minimum mesh size and fish size, and a proposed new closed ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 75–86 : Auteur(s): Parkes, G.B