Search results
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Selectivity and two biomass measures in an age-based assessment of Antarctic krill (Euphausia superba)
Abstract: An integrated, age-structured model was fitted to different combinations of survey data ... using two forms of selectivity (logistic or double-logistic) with time-constant or annually varying ... selectivity to investigate the population dynamics of Antarctic krill (Euphausia superba) near the Antarctic ... the South Shetland Islands from 1992 to 2011. Two indices of krill biomass based on (1) trawl-net ...
Meeting Document : WG-EMM-15/P07 : Author(s): D. Kinzey, G.M. Watters and C.S. Reiss
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A method for inferring movement rates of fish from mark–recapture data
Abstract: This paper presents methods to infer the rate of movement of fish that are marked ... , released, and subsequently captured. The information that is available is the location and date of the ... release and the recapture. In addition, the intensity of fishing effort (i.e. sampling) by location and ... time is known. The simplest approach is to make a frequency plot of the distance between each release ...
Meeting Document : WG-FSA-05/66 : Author(s): C. Wilcox (Australia)
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Science supporting the joint New Zealand–United States proposal for the establishment of a marine protected area in the Ross Sea Region
Region (RSR). A substantial amount of material has already been presented to the Scientific Committee ... and its working groups, and here we provide an abridged and annotated summary of that material. We ... organize our summary by linking spatial data to the specific protection and scientific objectives of the ... continental slope, the Balleny Islands and vicinity, and the northern RSR. A set of maps (provided in an ...
Meeting Document : SC-CAMLR-IM-I/08 : Author(s): Delegations of the USA and New Zealand
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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 ... spatial coverage of fishing effort to recapture tagged fish is an important consideration when ... measures of spatial overlap and potential bias in the development of tag-based biomass estimates are an ... statistics: (i) a single measure of the degree of spatial overlap between the release of tagged fish and ...
Meeting Document : WG-SAM-16/13 : Author(s): C. Marsh, A. Dunn and S. Mormede
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Otolith chemistry reveals local population structure of Antarctic toothfish (Dissostichus mawsoni) within the CCAMLR Subarea 48.6
and economical value and that distributed in the high latitude of the Southern Ocean. The CCAMLR ... subarea 48.6 is one of an important fishing zone, however, the local population structure of D. mawsoni is ... unknown in this regions, which hampered the understanding on population dynamics of this species and the ... management of toothfish fishery. The chemistry in the otolith can often be used to distinguish population ...
Meeting Document : WG-FSA-18/75 : Author(s): L. Wei, G.P. Zhu, S. Somhlaba, X.Y. Yu and M. Duan
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First increment validation of Patagonian toothfish (Dissostichus eleginoides) from Heard Island
one opaque and one translucent increment is formed each year on the sectioned face of sagittal ... routinely ageing D. eleginoides, resulting in differences of ageing data presented. One area that was ... assumed to cause interpretation differences was the position of the first increment that corresponded with ... the end of the first year of growth. While there is a general consensus that the observed increments ...
Meeting Document : WG-FSA-05/61 : Author(s): K. Krusic-Golub, C. Green and R. Williams (Australia)
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Genetic variation among populations of the Antarctic toothfish: evolutionary insights and implications for conservation
with over 70% of the world’s fish stocks being fully exploited and in many cases overexploited. On top ... of this, the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) has ... Southern Ocean. The primary target of these new commercial fishing ventures is the large pelagic ... available on the demography, genetics or life history of this large fish. Without such information we have ...
Meeting Document : WG-FSA-01/69 : Author(s): R.W. Parker, K.N. Paige and A.L. DeVries (USA)
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Natural fluctuations in the abundance of krill with due regard to global climate changes in the southern hemisphere: forecasting possibilities
Abstract: The eco systematic studies in biology and hydrology conducted in the Atlantic sector of ... ;success" in the reproduction of krill (Euphausia superba) and salp (Salpa tompsoni) (SC-CAMLR-XVI4 ... ; SC-CAMLR-XVV3). The analysis of multiannual observations (1977-1997) conducted by Siegel (Siegel et ... between the strong year-classes of krill and severe winters when the ice-cover extended itself northwards ...
Meeting Document : WG-EMM-98/52 : Author(s): K. Shust (Russia)
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Estimates of sustainable yield for 50 data-poor stocks in the Pacific coast groundfish fishery management plan
Abstract: The Magnuson-Stevens Fishery Conservation and Management Reauthorization Act of 2006 ... of sustainable yield for many these species were previously based on undocumented, ad-hoc analyses ... . We present estimates of sustainable yield for 50 of these stocks using two recently developed models ... designed to inform management of data-poor stocks. These models rely on recently reconstructed time series ...
Meeting Document : WG-SAM-11/P1 : Author(s): E.J. Dick and A.D. McCall
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A characterisation of the toothfish fishery in Subareas 88.1 and 88.2 from 1997/98 to 2005/06
nine years in Subarea 88.1 and for five years in Subarea 88.2 with a large amount of data collected on ... fished. The 2006 D. mawsoni catch was the second highest on record with a total of 3388 t against a ... combined catch limit of 3451 t. The subarea catch limit was almost reached in both Subarea 88.1 and 88.2 ... . The management of the SSRUs within the two subareas was changed for the 2006 season as part of a 3 ...
Meeting Document : WG-FSA-06/29 : Author(s): S.M. Hanchet, M.L. Stevenson and A. Dunn (New Zealand)