Resultados de la búsqueda
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Factors affecting the incidental mortality of seabirds in the Dissostichus eleginoides fishery in the southwest Atlantic (Subarea 48.3, 1995 season)
in vessels' analyses of catch of birds per unit effort (BPUE), as well as of the haul-by-haul ... hook size were important sources of variation, both in vessels' analyses of catch of birds per unit ... observed to have been killed was 1 178, giving a mortality rate (i.e. catch of birds per unit effort ... than those included in Figure 3. Nevertheless, one comparison could be made. The catch rate of a ... hook size has no effect on catch rates) with a probability of P < 0.001. Effect of Streamer Lines ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 79–91 : Autor(es): Moreno, C.A., P.S. Rubilar, E. Marschoff and L. Benzaquen
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A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
of standardized catch data by expressing the catches of N. rossii and N. gibberifrons in proportion ... catch data by expressing the catches of N. rossii and N. gibberifrons in proportion to the catches of N ... individuals were mainly juvenile, with a limited number of adults. This catch composition, found at a water ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Autor(es): Barrera-Oro, E. and E. Marschoff
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Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region
include a spatially explicit statistical catch-at-age population dynamics model. SPM incorporates a ... summer months, and annual catches have averaged about 2 700 tonnes since 2003. The catch limits for ... Bayesian sex- and age-structured statistical catch-at-age assessment model using CASAL software (Bull et ... recently in 2013 (Mormede et al., 2013a). The data within the assessment model include the total catch ...
Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Autor(es): Mormede, S., A. Dunn, S. Hanchet and S. Parker
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Length-based assessment for mackerel icefish (Champsocephalus gunnari) at South Georgia
the given harvest control rule to set a two-year total allowable catch (TAC). One issue is the ... these numbers forward under the given harvest control rule to set a two-year total allowable catch ... introduction In order to determine the catch levels that satisfy a given harvest control rule (HCR), the ... population is projected forwarded in time in order to assess what the sustainable catch over that time ... target harvest rate a two-year total allow- able catch (TAC) is obtained. Given that this process ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 129–137 : Autor(es): Hillary, R.M., C.T.T. Edwards, R.E. Mitchell and D.J. Agnew
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Scientific observations in CCAMLR fisheries – past, present and future
standard catch and effort data supplied by vessels, the collection of data by scientifically qualified ... complicate matters. Therefore, in addition to the standard catch and effort data supplied by vessels, the ... biological data; (iv) record by-catch (quantities and other biological data); (v) record cases of ... entanglement and incidental mortality of birds and mammals; (vi) record how declared catch weight is meas ... weight and fi nal product in the event that catch is recorded as processed product weight; (vii ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 81–98 : Autor(es): Sabourenkov, E.N. and E. Appleyard
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Analysis of haul data from the South Georgia krill fishery
hauls producing higher catch rates during the middle of the day. Individual hauls were examined to ... each vessel (average 7.9 in 1993,9.9 in 1995, and 7.0 in 1996), with hauls producing higher catch ... , catch levels as well as ensuring that adequate CCAMLR has placed considerable emphasis upon ... acoustic surveys (e.g. Biomass, 1986; Miller and catch rates. We also make inferences about the Hampton ... contains a value for the total catch (kilogram) from the haul. Thus the catch rate, that is the catch per ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 9–30 : Autor(es): Trathan, P.N., I. Everson, E.J. Murphy and G.B. Parkes
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Marine mammals and demersal longline fishery interactions in Crozet and Kerguelen Exclusive Economic Zones: an assessment of depredation levels
comparing catch-per-unit-effort (CPUE) (fish/weight/hook) of each longline set in the absence/presence of ... . Interactions were observed in all fi shing areas. The effect of depredation was assessed by comparing catch ... major decrease in the standardised catch-per-unit-effort (CPUE) from 2000 to 2003 was reported by the ... record the by-catch level (e.g. number of non-target species landed); and (iii) to record interactions ... total catch of 10 902 tonnes. Consequently, it was estimated that the actual removal of Patagonian ...
Science Journal Paper : CCAMLR Science, Volume 14 (CCAMLR Science, Volume 14) : 67–82 : Autor(es): Roche, C., C. Guinet, N. Gasco and G. Duhamel
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Fatty acid and stable isotope analyses to infer diet of Antarctic toothfish caught in the southern Ross Sea
compared to lipid profiles of fish and invertebrate species taken as by-catch in the fishery or collected ... composition was determined and compared to lipid profiles of fish and invertebrate species taken as by-catch ... toothfish, CCAMLR has set precautionary catch levels to manage this species in the Ross Sea region. Robust ... individual fish specimens which were taken as by-catch. In addition, muscle tissue samples were taken from ... in this study. Fish caught as by-catch and prey collected from toothfish stomachs were pooled or ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 21–36 : Autor(es): Jo, H.-S., I. Yeon, C. Lim, S.M. Hanchet, D.-W. Lee and C.-K. Kang
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Operational interactions of sperm whales and killer whales with the Patagonian toothfish industrial fishery off southern Chile
damaged catch when cetaceans were present included toothfish lips (n = 121), heads (n = 16) and trunks (n ... evidence of damaged catch when cetaceans were present included toothfi sh lips (n = 121), heads (n = 16 ... percentage of the total allocated catch as determined by public auction. Measures used by fi shers to ... . geographic position, meteorological condi- tions, catch, number of damaged fi sh, marine mammal species ... shery. Damaged catch Three types of evidence were found on the hooks after depredation on the line ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 127–140 : Autor(es): Hucke-Gaete, R., C.A. Moreno and J. Arata
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Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
related to the pattern of fishing effort. By comparing catch rates with and without the presence of ... fishing effort. By comparing catch rates with and without the presence of cetaceans, accounting for other ... around geographical ‘hotspots’. The catch-per- unit-effort (CPUE) was found to be slightly higher when ... whales are attracted to areas of high catch rates. Резюме Были проанализированы данные наблюдателей ... the cetaceans (by relocating the vessel) and replacing the lost catch. In addition, fishery managers ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Autor(es): Moir Clark, J. and D.J. Agnew