Resultados de la búsqueda
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Estimation of catch rate and mean weight in the exploratory Dissostichus fisheries across Divisions 58.4.1 and 58.4.2 using generalised additive models
these fisheries. Analyses of C2 catch rate and mean weight data from 2484 longline hauls conducted ... between 2003 and 2011 enabled the development of generalised additive mixed models that were then used to ... make predictions of catch rate and mean weight across fishable depths in both Divisions. Catch rates ... , with most locations within fishable depths predicted to have catch rate of less than 100 kg per 1000 ...
Meeting Document : WG-FSA-11/35 : Autor(es): D.C. Welsford (Australia)
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ANALYSIS OF ROSS SEA TAGGING AND RECAPTURE RATES
Abstract: 1. A dataset of all possible combinations of release nation, recapture nation, release ... year and recapture year for tags released and recaptured in the same SSRUs on the slope of 88.1 was ... (caught), all in numbers. 2. The overall size of the dataset was 734 combinations of release year ... the same. 3. This method could be used to identify groups of nations that have similar reporting rates ...
Meeting Document : WG-SAM-08/07 : Autor(es): D.J. Agnew (UK)
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Latitudinal variation of demersal fish assemblages in the western Ross Sea
°S. The distribution and abundance of 65 species collected in these surveys were examined to ... influence this. Species accumulation with sample frequency did not reach an asymptote, but the rate of new ... species was low suggesting data were adequate for describing the main components of the communities. Three ... broad assemblages were identified, in the southern Ross Sea (south of 74°S), central–northern Ross Sea ...
Meeting Document : WG-FSA-10/P03 : Autor(es): M.R. Clark, M.R. Dunn, P.J. McMillan, M.H. Pinkerton, A. Stewart and S.M. Hanchet
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Measures to avoid bias in abundance estimates of Dissostichus spp. based on tag-recapture data
Abstract: Using the simplest form of an abundance estimator using tag-recapture data, the Lincoln ... against this bias, or to account for their effects in assessment models. In nearly all cases, examples of ... these biases. Estimates of post-capture mortality, tag detection rates and where it occurs, post-release ... depredation rates are a priority for new tagging programs and tag-based assessments. Due to the complexity of ...
Meeting Document : WG-SAM-12/23 : Autor(es): D.C. Welsford and P.E. Ziegler (Australia)
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Characterisation of Muraenolepis species by-catch in the CCAMLR Convention Area
taxonomy of the group is needed and the number of species is uncertain. The few biological studies ... published suggest a relatively fast growing, semelparous, life history with a maximum age of 11 years. The ... estimate of K from the growth function for specimens assumed to be M. evseenkoi is much higher than for ... localised area of high catch rates occurs on Iselin Bank on Ross Sea slope. However, effects of fishing on ...
Meeting Document : WG-FSA-12/50 : Autor(es): S. Parker, P. McMillan and P. Marriott (New Zealand)
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Preliminary assessment of Patagonian toothfish in Subarea 48.3
Abstract: A preliminary assessment of toothfish (Dissostichus eleginoides.) in Subarea 48.3 is ... presented. The assessment results from this year’s analyses are very similar to those of 2011. SSB in the ... terminal assessment year continues to be estimated at around 54% of virgin biomass, consistent with the ... outputs from the 2-fleet and 3-fleet assessments are very similar with the exception of the ...
Meeting Document : WG-FSA-13/30 : Autor(es): R. Scott (United Kingdom)
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European Union – Measurement of capacity in CCAMLR exploratory fisheries in Subareas 88.1 and 88.2
fishery. The number of vessels operating in the fishery has progressively increased in recent years yet ... individual vessels have reduced. This report investigates recent trends in the development of the Ross Sea ... fishery in order to be aware of the pressures within the fishery as well as the trends and changes that ... are impacted by management measures. There is therefore a requirement for the routine production of ...
Meeting Document : WG-SAM-14/19 : Autor(es): Delegation of the European Union
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A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2, based on results from the 2015 random stratified trawl survey
vicinity of Heard Island during May 2015. This paper provides a preliminary assessment of mackerel icefish ... population structure, abundance and yield for the area of Division 58.5.2 to the west of 79o 20’ E using ... catches of 482 t in the 2015/16 season and 357 t in the 2016/17 season. Author(s): D.C. Welsford ... (Australia) Title: A preliminary assessment of mackerel icefish (Champsocephalus gunnari) in Division 58.5.2 ...
Meeting Document : WG-FSA-15/12 Rev. 1 : Autor(es): D.C. Welsford (Australia)
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Strengthening the joint work of the CEP and SC-CAMLR on climate change
Abstract: ASOC strongly supports the decision of ATCM XXXVIII to hold a second joint workshop ... outcomes for the workshop, including: agreeing on a scientific baseline; compiling overviews of existing ... a process for information updates and exchange; considering mechanisms for temporary protection of ... areas affected by rapid climate events such as the collapse of an ice shelf; considering possible ...
Meeting Document : SC-CAMLR-XXXIV/BG/29 : Autor(es): Submitted by ASOC
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A characterisation of the toothfish fishery and tagging programme in the Amundsen Sea region (SSRUs 88.2C–H) through 2015–16
Abstract: This report provides a characterisation of the toothfish fishery and associated tagging ... 88.2C-G) into four smaller research blocks in order to increase the likelihood of recaptures of ... previously tagged toothfish. In 2015/16, a total of 9 inter-season tagged fish were recaptured in these ... research blocks, confirming the utility of this approach to recapture tagged fish, and providing key ...
Meeting Document : WG-FSA-16/45 : Autor(es): K. Large, S. Parker and S. Hanchet