Search results
-
Use of the Leslie stock depletion model for the assessment of local abundance of Patagonian toothfish (Dissostichus eleginoides)
used to examine local patterns in catch per unit effort (CPUE) in the longline fisheries for Patagonian ... be modelled using a linear regression of catch per hook against cumulative catch, when single vessels operate ... and insufficiently high catch to cause local depletion. Suggestions are made for further work. File: 04parkes ... The Leslie depletion model has been used to examine local patterns in catch per unit effort (CPUE ... , Chile Abstract The Leslie depletion model has been used to examine local patterns in catch per unit ... analyses to examine whether declines in CPUE can be modelled using a linear regression of catch per hook ... against cumulative catch, when single vessels operate in localised areas for periods of at least three ... catch to cause local depletion. Suggestions are made for further woyk. Resume Le modele ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 55–77 : Author(s): Parkes, G., C.A. Moreno, G. Pilling and Z. Young
-
Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach
catches. This species is eaten by seals, whales and seabirds, the latter being the most reliable source ... that the timing and catches of the fishery should be highly conservative and set taking into account the timing ... Georgia in June 1996 provided the basis for determining realistic potential catch rates. File ... research fishing and commercial catches. This species is eaten by seals, whales and seabirds, the latter ... jigger (Ikn Sung 101) carried out research fishing in the vicinity of South Georgia with a catch limit ... and distribution of the species obtained from research fishing and commercial catches. This species is eaten ... ommastrephids, the species is probably semelparous. It is proposed that the timing and catches of the fishery ... provided the basis for determining realistic potential catch rates. Dans l'attente du developpement ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Author(s): Rodhouse, P.G
-
Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations
contributors to the total catch. A recent shift in operational timing towards later months within fishing ... the pelagic SSMUs, only one-third were identified as major contributors to the total catch. A recent shift ... a workshop to evaluate candidate management procedures for subdividing the pre- cautionary catch limit ... catch limits, the behavioural patterns of fishing vessels are one of the most important factors, since ... to the total catch. A recent shift in operational timing towards later months within fishing seasons ... following the Rules for Access and Use of CCAMLR Data (fine-scale catch and effort data). The STATLANT ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Author(s): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu
-
An assessment of the impact of krill fishery on penguins in the South Shetlands
. The krill catch is very low in December while the catch rate for the following three months is roughly ... catch rate (≤10 x 10 3 tonnes/1O-day period) is smaller by one or more orders of magnitude within ... biomass, and hence on penguins, when catch levels are also taken into account. File: 08ichii-etal.pdf ... (Subarea 48.1) was made based on available information on the fishery, penguins and krill. The krill catch ... on available information on the fishery, penguins and krill. The krill catch is very low in December while ... the catch rate for the following three months is roughly constant (3 000 to 10 000 tonnes/lO-day period ... ) and its variability (the order of 100 X 103 tonnes/10-20-day period), the present catch rate (110 X 103 ... on penguins, when catch levels are also taken into account. Resume La concurrence entre la pecherie ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Author(s): Ichii, T., M. Naganobu and T. Ogishima
-
The fishery for Patagonotothen brevicauda guntheri in CCAMLR Subarea 48.3
/ Description: Fine-scale data supplied to CCAMLR for 1987/88 showed that the catches of P atagonotothen ... was only ever caught at Shag Rocks. Therefore the South Georgia catches were almost certainly of another ... that they would also catch undersized individuals of other, larger species. Survey results suggest ... as a by-catch of other fisheries; this suggests that illegal nets were used. File: 16-Everson-and-Mitchell.pdf ... in Table 1. In 1988 CCAMLR introduced Conservation Measure 12NII which limited the total catch ... to CCAMLR for 1987/88 showed that the catches of Patagonotothen brevicauda guntheri were five times greater ... the South Georgia catches were almost certainly of another species. The small size of P.b. guntheri means ... that they can only be caught with net meshes so small that they would also catch undersized individuals ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 275–283 : Author(s): Everson, I. and C. Mitchell
-
An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) for the Heard and McDonald Islands using CASAL
) abundance estimates by length bin, commercial catch-at-length data, standardised CPUE series for the trawl ... , iteratively estimated process error for the catch-at-length data and the inclusion versus exclusion of the tag ... and commercial catch CPUE data is given, but incorporation of process error for the RSTS data was not considered ... random stratified trawl survey (RSTS) abundance estimates by length bin, commercial catch-at-length data ... by length bin, commercial catch-at-length data, standardised CPUE series for the trawl grounds, and tag ... process error for the catch-at-length data and the inclusion versus exclusion of the tag data. A key ... predictions. Extension of this method of estimating process error to RSTS abundance data and commercial catch ... datasets, including multiple fisheries catch- at-length proportions, fisheries-independent re- search ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 1–34 : Author(s): Candy, S.G and A.J. Constable
-
Observations of fishing operations on a krill trawler and distributional behaviour of krill off Wilkes Land during the 1985/86 season
areas. While catch per towing time reflects within-swarm density, catch per day was thought to be a good ... distributions occurring in different fishing areas. While catch per towing time reflects within-swarm density ... , catch per day was thought to be a good index to measure abundance of a concentration. Comparison ... m to 10 km with different distributions occurring in different fishing areas. While catch per towing time ... reflects within-swarm density, catch per day was thought to be a good index to measure abundance ... the Antarctic ecosystem as a whole. The usefulness of CPUE (catch per unit effort) data as an index of krill ... krill meat (for human consumption), and more than half the total Japanese catch is used for direct ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 335-368 : Author(s): Ichii, T.
-
Estimates of fish stock biomass around South Georgia in January/February 1985
Abstract / Description: Catch data from a bottom trawl survey in January/February 1985 have been used ... of N. guntheri and D. eleginoides stocks is difficult to assess. The by-catch species N. gibberifrons, Ch ... Catch data from a bottom trawl survey in January/February 1985 have been used to estimate stock ... and D. eleginoides stocks is difficult to assess. The by-catch species N. gibberifrons, Ch. aceratus and Ps ... Abstract Catch data from a bottom trawl survey in January/February 1985 have been used to estimate stock ... and D. eleginoides stocks is difficult to assess. The by-catch species N. gibberifrons, Ch. aceratus and Ps ... Published information on fish biomass in the Southern Ocean is still very limited, The "swep t area ... both in terms of weight and numbers, The method has its limitations (i.a. CARROTHERS, 1981; KOCK ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 1-32 : Author(s): Kock, K.-H.
-
Significant conservation benefits obtained from the use of a new fishing gear in the Chilean Patagonian toothfish fishery
by sperm and killer whales on fish catch rate was assessed during September–December 2006. The results were ... ; there was also a reduction in depredation of the catch from a maximum of 5% in 2002 to a maximum of 0.36 ... % of the total catch in 2006. The fishers who developed the net sleeve modification called it ‘cachalotera’ (from ... with regard to seabird mortality and depredation by sperm and killer whales on fish catch rate was assessed ... and depredation by sperm and killer whales on fish catch rate was assessed during September–December 2006 ... compared to zero in 2006; there was also a reduction in depredation of the catch from a maximum ... of 5% in 2002 to a maximum of 0.36% of the total catch in 2006. The fishers who developed the net sleeve ... ranged from entanglement to depredation of catch, or the aggregation of individuals around the ves- sel ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 79–91 : Author(s): Moreno, C.A., R. Castro, L.J. Mújica and P. Reyes
-
Preliminary analyses of data collected during experimental phases of the 1994/95 and 1995/96 Antarctic crab fishing seasons
; extrapolations must consider location. Linear models fitted to catch per unit effort (CPUE) and cumulative catch ... regressions were probably a result of small catches, inter-haul variability in CPUE, and crab movement ... abundance when larger areas are considered and larger catches are taken. Approximately 6 000 crabs were ... to catch per unit effort (CPUE) and cumulative catch data from the Phase 2 depletion experiments did ... these M releases. An attempt was made to account for assumption 6 by limiting C to catches made within 36 days ... C was also limited to catches made within the area defined by the intersecting arcs of circles drawn around ... ; extrapolations must consider location. Linear models fitted to catch per unit effort (CPUE) and cumulative ... catch data from the Phase 2 depletion experiments did not have significant negative slopes ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 141–159 : Author(s): Watters, G