Resultados de la búsqueda
-
Mackerel icefish Champsocephalus gunnari in the diet of upper trophic level predators at South Georgia: implications for fisheries management
dominant mode at 180-200 mm total length (1+ age class), with strong cohorts entering the population in ... 1993, 1996, 1999 and 2001. A recruitment index based on the contribution by mass of the 1+ age-class in ... (s): K. Reid, S. Hill and T. Diniz (United Kingdom) Title: Mackerel icefish Champsocephalus gunnari ...
Meeting Document : WG-FSA-03/74 : Autor(es): K. Reid, S. Hill and T. Diniz (United Kingdom)
-
Assessment models for Antarctic toothfish (Dissostichus mawsoni) in SSRU 882E including data from the 2005/06 season
estimated to be 352 t for the reference case and 366 t for the all vessels case, assuming a future fishing ... and recapture data and the all vessel tag-release and recapture data (B0= 10 300 t and 9 530 t ... respectively). Model fits to the data were adequate, with the tag-release and recapture data providing the most ... MCMC estimates of initial (equilibrium) spawning stock abundance (B0) were very uncertain, with the ...
Meeting Document : WG-FSA-06/48 : Autor(es): A. Dunn and S.M. Hanchet (New Zealand)
-
An assessment of the impact of krill fishery on penguins in the South Shetlands
equivalent amount (3,000-10,000 t/10-day) for the following three months, with its increased fishing ... penguins is estimated to be large in the shelf and slope near King George Island (11,680 t/10-day), whereas ... small near Livingston (2,570 t/10-day) and Elephant (220 t/10-day) Islands. This little overlap between ... into and out of the area, but high krill biomass (100-1000 x103t) usually existed there. Compared with ...
Meeting Document : WG-KRILL-93/07 : Autor(es): T. Ichii, M. Naganobu and T. Ogishima (Japan)
-
The BROKE-West acoustic krill biomass survey of CCAMLR Division 58.4.2
is intended to produce a new estimate of B0 for this Division so that a revised precautionary catch ... limit can be established by CCAMLR.. The survey will be conducted from a single ship and will consist of ... . Nicol, S. Kawaguchi, T. Jarvis and T. Pauly (Australia) Title: The BROKE-West acoustic krill biomass ...
Meeting Document : WG-EMM-05/11 : Autor(es): S. Nicol, S. Kawaguchi, T. Jarvis and T. Pauly (Australia)
-
Antarctic krill fisheries management: "What's next?"
that could be used to do this, and ASOC encourages CCAMLR to develop a plan for discussion of these ... data collection by fishing operators and from CEMP will be critical to progressing FBM. Another ... outstanding need is the ability to quantify krill flux, a factor that creates considerable uncertainty for ... practice. Author(s): Submitted by ASOC Title: Antarctic krill fisheries management: "What's ...
Meeting Document : SC-CAMLR-XXXV/BG/18 : Autor(es): Submitted by ASOC
-
Age determination of the Antarctic fishes Champsocephalus gunnari and Notothenia rossii from South Georgia
periodicity in Antarctic hydrographic conditions, age determination of Antarctic fish has proven to be ... a fish's past history. As part of an effort to study Antarctic fish growth and population ... . Multivariate mathematical models relating age to otolith morphometrics and fish size demonstrated that age ... could be reliably determined from body measurements and otolith measurements. These techniques allowed ...
Meeting Document : SC-CAMLR-VI/BG/43 : Autor(es): R. Radtke (USA)
-
Progress on the application of an age-structured production model fitted to commercial catch-rate and catch-at-length data to assess the toothfish (Dissostichus eleginoides) resource in the Prince Edward Island vicinity
particular, to accommodate the view of the August 2003 meeting of the Subgroup on assessment methods that 0.2 ... stock status that can be argued from these analyses, it is suggested that annual catch levels should not ... allow the estimation of a selectivity-at-age function that decreases at larger ages. This is, in ... yr-1 is likely the largest value of natural mortality M that is plausible for toothfish. Catch, catch ...
Meeting Document : WG-FSA-03/97 : Autor(es): A. Brandão and D.S. Butterworth (South Africa)
-
Preliminary standardised CPUE analysis of the New Zealand part of the toothfish fishery in CCAMLR Subarea 88.1, from 1988/89 to 2002/03
models may be influenced by extreme values of soaktime, depth and length of line set, that reflect the ... the main grounds and vessels analysis to include the 2003 season. Seasonal indices were variable with ... has extended to other grounds since 2001, a further sensitivity analysis was completed for the two ... confined to the two vessels with a consistent fishing history, and as such only represents a small area of ...
Meeting Document : WG-FSA-03/43 : Autor(es): R.G. Blackwell and S.M. Hanchet (New Zealand)
-
Larval development and spawning ecology of euphausiids in the Ross Sea and its adjacent waters in 2004/05
juvenile or adult stages. Eggs and larvae of E. superba occurred with gravid females along the slope, but ... no juveniles occurred concurrently. Thus the slope does not appear to be a nursery ground for this ... surface layers from furcilia I onward. The onset of recruitment to calyptopis I appeared to be earlier in ... the more northern species with the exception of E. crystallorophias, which recruited before E. superba ...
Meeting Document : WG-EMM-10/P06 : Autor(es): K. Taki, T. Yabuki, Y. Noiri, T. Hayashi and M. Naganobu
-
An update on the ageing of Antarctic toothfish, Dissostichus mawsoni, from East Antarctica and the Amundsen Sea
Zealand reference collection for Antarctic toothfish, with all pairwise comparisons between readers and ... high (all IAPE < 2%, CV < 3%), confirming that a similar level of detail is revealed by each ... preparation method. Therefore, either method can be used to provide reliable age estimates for Antarctic ... using thin sections (IAPE = 2.88, CV = 4.07). The age estimates provided by this study will be ...
Meeting Document : WG-FSA-17/15 : Autor(es): G. Nowara, B. Farmer, T. Barnes, P. Ziegler and D. Welsford