Search results
-
Relative selectivity of four sampling methods using traps and trawls for male snow crabs (Chionoecetes opilio)
Abstract: Catch rate and catch composition of male snow crabs were compared for four sampling ... deployed during the day. and (4) bottom trawl deployed at night. Catches were characterized in terms ... than those caught during the day; 2) large-clawed crabs predominated in the catches from traps whereas ... small-clawed animals predominated in the trawl catches; 3) soft-shell crabs were more common in trawl ...
Meeting Document : WS-CRAB-93/11 : Author(s): J.M. Hoenig and E.G. Dawe (USA)
-
A PROPOSED MANAGEMENT PROCEDURE FOR THE TOOTHFISH (Dissostichus eleginoides) RESOURCE IN THE PRINCE EDWARD ISLANDS VICINITY
of the catches made. A specific MP, with its associated control parameter values, is proposed for implementation ... based upon the results of the trials. Given the importance of an adequate catch rate for the economic ... probability of securing a catch rate increase, whatever the current resource status. MP performance ... if steepness h is low. These tests also indicate that monitoring of future catch-at-length information would ...
Meeting Document : WG-SAM-08/11 : Author(s): A. Brandão and D.S. Butterworth (South Africa)
-
Krill fishery report: 2006 update
catch of krill for the season is approximately 97090 t. This compares with 127035 t of krill reported ... return to port. The report includes: Availability of fishery and observer data; Time series of catch ... by season, Contracting Party and small-scale management unit; Species composition of by-catch; Occurrence ... of incidental catches of seabirds and mammals; Development of measures of overlap between the krill fishery ...
Meeting Document : WG-EMM-06/5 : Author(s): Secretariat
-
Sampling toothfish from longlines with unequal probabilities
Abstract: To obtain a representative sample of the catch taken by toothfish longliners, CCAMLR ... with less catch effort than those outside; or more generally, sampling effort is applied in inverse ... of sampling data, or sampling effort should be proportional to catch effort. As vessels generally record ... To obtain a representative sample of the catch taken by toothfish longliners, CCAMLR observers ...
Meeting Document : WG-FSA-03/85 : Author(s): J.R. Ashford (USA)
-
QUANTIFYING MOVEMENT BEHAVIOUR OF VESSELS IN THE ANTARCTIC KRILL FISHERY
the behaviour of the krill fishery. Analysis of distance between hauls in relation to their catch level revealed ... a distinct pattern. Mean between-haul distances were generally longer when catch levels fell below 10 t per ... haul, and the travel distance decreased as the catch level increased; this pattern was most obvious ... of the krill fishery. Analysis of distance between hauls in relation to their catch level revealed a distinct ...
Meeting Document : WG-EMM-09/P05 : Author(s): S. Kawaguchi and S.G. Candy
-
Robust characterisation of the age structure, growth and recruitment of toothfish in the Macquarie Island and Heard Island and McDonald Islands fisheries
in these fisheries. The inclusion of catch at age data is shown to substantially improve the precision of the stock ... assessment in Division 58.5.2 compared to a scenario using only catch at length data. The ongoing collection ... and processing of otoliths to allow the inclusion of population specific estimates of catch at age data remains ... in these fisheries. The inclusion of catch at age data is shown to substantially improve the precision of the stock ...
Meeting Document : WG-FSA-12/P07 : Author(s): D.C. Welsford, S.G. Candy, J.J. Verdouw and J.J. Hutchins
-
The results of performance of tagging programs of the Korean exploratory fishery for Dissostichus spp. in 88.1 in the 2010/11 season
on Dissostichus spp. and by-catch such as their distribution, size, sex, weight, etc. This paper presented ... the results from the fisheries and comparison of statistics in each SSRU. Total catch including by-catches ... in 88.1 BCJL were 35,436 fishes. Dissostichus Spp. was the highest catch, contributing 99.62% to the total ... catches in 78 hauls while by-catches were 133 fish. The CPUEs of Dissostichus Spp. in 88.1 ...
Meeting Document : WG-FSA-11/54 : Author(s): T. Jung and H.J. Choi (Republic of Korea)
-
Otolith and body size relationships in bigeye grenadier (Macrourus holotrachys) in CCAMLR Subarea 48.3
holotrachys) caught as by-catch in the Patagonian toothfi sh (Dissostichus eleginoides) fishery in Subarea ... A large sample of otoliths from bigeye grenadier (Macrourus holotrachys) caught as by-catch ... of otoliths from bigeye grenadier (Macrourus holotrachys) caught as by-catch in the Patagonian toothfi sh ... INTRODUCTION Fish of the family Macrouridae (rattails and grenadiers) are regularly taken as by-catch ... catch by weight in these fi sheries (van Wijk et al., 2000). In other fi sheries ... ), reported macrourid by-catch is less, between 1–2% of the total catch weight. However, even ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 133–143 : Author(s): Morley, S. and M. Belchier
-
Killer whale Orcinus orca and sperm whale Physeter macrocephalus interactions with longline vessels in the Patagonian toothfish fishery at South Georgia, South Atlantic
interactions were observed at night. Catch rates were significantly lower (P > 0.05) when killer whales were ... /hook; 48.5 fish/1000 hooks). The same trend was, however, not observed for catch rates when sperm ... whales were present during hauling (0.32 kg/hook; 51.9 fish/1000 hooks). Catch rates were in fact ... . It is likely that sperm whales were attracted to areas with high catch rates, but in areas with lower catch ...
Meeting Document : WG-FSA-03/27 : Author(s): M.G. Purves (United Kingdom), D.J. Agnew (United Kingdom), E. Balguerías (Spain), C.A. Moreno (Chile) and B. Watkins (South Africa)
-
e-sc-viii-a5.pdf
... . With this relationship, net catch data on the distribution of krill sizes can be converted to a representative ... also be feasible. In this case, rather than relying on net catch data, the mean and distribution ... of target strength, inadequate calibration of acoustic instrumentation and limited identification ... frequency distributions) and that catch data can also provide essential information for independent ... . With this relationship, net catch data on the distribution of krill sizes can be converted to a ... determination may also be feasible. In this case, rather than relying on net catch data, the mean and ... avoidance and integration of areas containing no krill as well as catch selectivity effects, are all
application/pdf attached to:WG-KRILL-89Meeting Report : WG-KRILL-89