Результаты поиска

1. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

   Paper Title:  Spatially explicit population dynamics models for Antarctic toothfish in the Ross ... dynamics of spatial heterogeneity of the population along with age structure, movement and reproductive ... models were developed for the Antarctic toothfish (Dissostichus mawsoni) population in the Ross Sea ... region and used as operating models to evaluate the performance of single-area assessments. The models ... low (see below). This pattern is also reflected in the mean weight of fish per SSRU (Table 3 ... antarctIc toothfISh In the roSS Sea regIon S. Mormede and A. Dunn National Institute of Water and ... al. 20 one or the other of these methods are available in various stock assessment modelling ... in a wide variety of applications, including the assessment of stocks that inhabit, or move between ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Автор(ы): Mormede, S., A. Dunn, S. Hanchet and S. Parker

2. Potential nursery areas for fish in the Prydz Bay region

   Paper Title:  Potential nursery areas for fish in the Prydz Bay region Abstract / Description:  A ... survey with a fine-meshed midwater trawl in Prydz Bay in January/February 1991 indicated the potential ... for the shelf area of the Bay to be a nursery ground for nototheniid and channichthyid fish. Nearly ... all juvenile fish were caught in the top 50 m over the shelf, and more than 95% were Pleuragramma ... in January/February 1991 indicated the potential for the shelf area of the Bay to be a nursery ... were caught in a 30 minute haul) especially near the shelf break. The dominant size class was of 45 mm ... less common, and were found in the central and western parts of the shelf. Although no specific ... potential of a significant by-catch of juvenile fish in krill fishing operations, the Scientific Committee ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Автор(ы): Williams, R.

3. Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)

   establish the presence of Dissostichus spp. in Subareas 48.1, 48.2 and 88.3. Industrial longlines (Spanish ... 'S). Yields of Dissostichus spp. were very low in the three subareas, with values of only 5.7 g ... Paper Title:  Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1 ... del Fuego was conducted as part of the New Fisheries Projects developed by Chile, primarily to ... Ocean (61°24'S) to the Scotia Sea in the South Atlantic (58'03's). Yields of Dissostichus spp. were ... very low in the three subareas, with values of only 5.7 g/hook (Subarea 88.3), 19.1 g/hook (Subarea ... fishing in Antarctic waters date back to the beginning of this century. During World War I, the United ... Kingdom conducted a detai led s tudy of the fishing possibilities in the Falkland / Malvinas Islands ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Автор(ы): Arana, P.M. and R. Vega

4. Commercial fishing vessels as research vessels in the Antarctic – requirements and solutions exemplified with a new vessel

   in the ecosystems of the Antarctic region require a precautionary approach with respect to the human ... the potential of using commercial fishing vessels to bridge the gap in research vessel capacity. The ... Paper Title:  Commercial fishing vessels as research vessels in the Antarctic – requirements and ... use of these ecosystems. In particular, resource harvesting requires enough basic knowledge, as well ... The Antarctic region is vulnerable to human activity. In particular, under the impact of global ... ., 2013). Krill plays a key role in Antarctic marine ecosystems (Siegel, 2010). The combined impact of ... presently seen in the ecosystems of the Antarctic region require a precautionary approach with respect to ... the human use of these ecosystems. In particular, resource harvesting requires enough basic knowledge ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 11–17 : Автор(ы): Godø, O.R., C. Reiss, V. Siegel, J.L. Watkins

5. Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed with mitochondrial and intron DNA markers

   digests of nine sub-regions of the mitochondrial genome. Polymorphisms were found in four of seven introns ... Paper Title:  Low genetic diversity in the Antarctic toothfish (Dissostichus mawsoni) observed ... areas. Direct sequencing of cytochrome b (665 bp) and the left domain of the control region (639 bp ... digested with the restriction enzymes, but there was no population differentiation among the three sea ... were found in four of seven introns digested with the restriction enzymes, but there was no population ... 88.2, in the region of the Ross Sea, since 1997; small catches have also been made in Division 58.4.1 ... South Georgia and the other in the Weddell Sea (Zane et al., 1998). Several molecular studies of D ... Indian Ocean sectors of the Southern Ocean, while a third genetic group occurred in the Pacifi c Sector ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 43–51 : Автор(ы): Smith, P.J. and P.M. Gaffney

6. Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

   careful consideration of the data and available methods, several errors are noted in earlier estimates ... Paper Title:  Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around ... South Georgia Abstract / Description:  Information on natural mortality rates of the mackerel icefish ... . Unfortunately, because none of the datasets are sufficiently comprehensive, it is impossible to unequivocally ... published paper. The mean of the four values given in their table for the 1964/65 season is 0.4075 and not ... correctly calculated mean values are set out below along with the mean age of the population given in ... time, which in turn would explain a steady decline in the mean age of fish in the population. Both of ... Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR). The most recent analysis ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Автор(ы): Everson, I

7. Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea (CCAMLR Subareas 88.1 and 88.2) bottom longline fisheries targeting Antarctic toothfish

   counted in estimates of total fishing removals or otherwise accounted for in stock assessment models. The ... mortality resulting from the loss of sections of bottom longline gear in the Ross Sea region and Subarea ... Paper Title:  Estimating unaccounted fishing mortality in the Ross Sea region and Amundsen Sea ... average 208 tonnes of Antarctic toothfish mortality may be unaccounted for annually. While the current ... in km dur- ing season h in SSRU i for vessel j and hiju was the mean number of hooks set during ... . 2002. Estimation of the variance of mean catch rates and total catches of non-target species in New ... the loss of sections of bottom longline gear in the Ross Sea region and Subarea 88.2 Antarc- tic ... , may result in unaccounted mortality of toothfish or other species. In the Ross Sea region and ...

   Science Journal Paper : CCAMLR Science, Volume 19 (CCAMLR Science, Volume 19) : 17–30 : Автор(ы): Webber, D.N. and S.J. Parker

8. Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996

   from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of ... the fishery. Results of bottom trawl surveys conducted by Germany in the vicinity of Elephant Island ... in the 1980s showed that stocks of Champsocephalus gunnari, Notothenia rossii, Gobionotothen ... closure of the area in November/December 1996 suggested that the biomass of the standing stock of finfish ... (C. aceratus) Mean densities of C. aceratus were similar in the three depth strata from 101 to 400 ... , with most of the commercial harvesting taking place in the first two years of the fishery. Results of ... bottom trawl surveys conducted by Germany in the vicinity of Elephant Island in the 1980s showed that ... 1989/90 onwards. Results of the first bottom trawl survey carried out after the closure of the area in ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Автор(ы): Kock, K.-H

9. Killer whale (Orcinus orca) and sperm whale (Physeter macrocephalus) interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic

   most abundant marine mammal observed in the vicinity of vessels when lines were being hauled, being ... no cetaceans were present. Catch rates were slightly higher in the presence of sperm whales and it is ... of unrecorded fish removals on stock assessment models, modifications in the behaviour of marine ... with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic Abstract ... abundant marine mammal observed in the vicinity of vessels when lines were being hauled, being present ... during which no cetaceans were present. Catch rates were slightly higher in the presence of sperm ... implications such as the effect of unrecorded fi sh removals on stock assessment models, modifi cations in the ... in this zone is restricted to the winter months to reduce the incidental mortality of seabirds ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 111–126 : Автор(ы): Purves, M.G., D.J. Agnew, E. Balguerías, C.A. Moreno and B. Watkins

10. Towards an initial operational management procedure for the krill fishery in Subareas 48.1, 48.2 and 48.3

    (Euphausia superba) in Subareas 48.1, 48.2 and 48.3 requires a basis for the assessment of resource status ... 0.75 CPUE ref. An operating model of krill dynamics in the region is developed for simulation testing ... Paper Title:  Towards an initial operational management procedure for the krill fishery in ... , and an algorithm for specifying the levels of regulatory mechanisms (e.g., a catch control law) that ... estimation of the fraction of the mean unexploited biomass level at which MSY (in an average sense) is ... of krill dynamics in the region is developed for simulation testing purposes. A provisional ... the krill resource in the region; 192 (ii) an algorithm for specifying appropriate levels of ... discussion is in the context of a developing fishery - hence the reference to an "initial" procedure. The ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 189–219 : Автор(ы): Butterworth, D.S.

Страницы