Результаты поиска

1. The ecosystem approach to managing fisheries: achieving conservation objectives for predators of fished species

   to managing fisheries (CCAMLR, 1994) and setting precautioi~ary catch limits in the krill and some ... interactions between species. Species that directly interact with the target and by-catch species (hereafter ... predator criterion for determining catch limits of krill described above, a simple expectation would be ... recovery measures? In the general case, the assumption is that the catch limits are derived with ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 37–64 : Автор(ы): Constable, A.J

2. Standardization of fishing effort for Champsocephalus gunnari in the South Georgia area (Subarea 48.3)

   area (Subarea 48.3) Abstract / Description:  Traditional calculation of catch-per-unit-effort series is ... calculation of catch-per-unit-effort series is inflexible in its use of data types and has no estimate of ... sequence of catch-per-unit-effort values was developed by years of fishing. Standardized values of fishing ... effort were then calculated by dividing summary catch by respective values of catch-per-unit-effort ... involves representing a standardized value of catch-per-effort by means of the following formulae: 328 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 327–336 : Автор(ы): Gasiukov, P.S.

3. Fish stock assessment survey in Subarea 48.3

   positions of hauls, catch rates and size composition of catches. The standing stock of one of the most ... . Details are given of positions of hauls, catch rates and size composition of catches. The standing stock ... incomplete satellite cover, only for about half the day. The landed catch of all fish species at each ... these species in the catch. Weight, stomach fullness, otoliths and, where possible, scales, were also ... South Georgia and Table 5 for Shag Rocks. The distribution of catch rates for the major species are ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Автор(ы): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski

4. The Kerguelen database

   , position of individual trawls, total catches and catch per species. Four species (Champsocephalus gunnari ... catches and catch per species. Four species (Champsocephalus gunnari, Notothenia squamifrons, N. rossii ... (Catch Per Unit Effort) for the whole area are shown in Figures 6 and 7. Two peaks can be seen in the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 23-54 : Автор(ы): Duhamel, G.

5. Beyond MSY: a consideration of definitions of management objectives

   already recruited M is the losses due to natural mortality and C is the catch. In this formulation ... be met by taking an amount R-S t' so that the escapement (i.e. recruitment op less catch) will ... MSY is equal to the minimum catch, occurring after poor environmental conditions. It may also be ... ' the value giving maximum yield per recruit, is the extreme upper limit, but for most purposes ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 299-322 : Автор(ы): Gulland, J.A.

6. Notes on the use of virtual population analysis for stock assessment of the mackerel icefish, Champsocephalus gunnari (Lönnberg, 1906) in Subarea 48.3 for the 1990/91 and 1991/92 seasons

   old fish. Negligible catch was reported for 1990/91, hence projections to 1991/92 predicted that the ... would form a considerable proportion of the catch. The observed age distribution from a stock ... . gunnari population in Subarea 48.3. Closure of the fishery in 1991/92 resulted in no commercial catch in ... method of standardising the survey indices to account for variations in the commercial catch between the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 49–79 : Автор(ы): Parkes, G.

7. Do krill and salps compete? Contrary evidence from the krill fisheries

   / Description:  Salp by-catch and krill discolouration ('green' krill) caused by active feeding on ... Salp by-catch and krill discolouration ('green' krill) caused by active feeding on phytoplankton were ... . Keywords: krill, feeding, phytoplankton, krill fishery, salps, by-catch, competition, CCAMLR INTRODUCTION ... the Japanese krill trawlers have accumulated a large amount of data on salp by-catch and on the ... occurrence of green krill. Local salp density could be calculated from salp by-catch data. Green krill are ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 205–216 : Автор(ы): Kawaguchi, S., T. Ichii, M. Naganobu and W.K. de la Mare

8. 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 ... 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 in the ... total catch by weight in these fi sheries (van Wijk et al., 2000). In other fi sheries, such as the ... ), reported macrourid by-catch is less, between 1–2% of the total catch weight. However, even in these ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 133–143 : Автор(ы): Morley, S. and M. Belchier

9. Environment–krill relations in the South Georgia marine ecosystem

   distribution at one or more scales. In this paper a time series of the catch per unit effort (CPUE ... around South Georgia. METHODS AND DATA Catch per Unit Effort Some measure of catch rate from a ... sea; catch and effort data were available for the period 1974 to 1992. For the period 1974 to 1976 ... Soviet vessels fish for krill during November or December, but catch data were not available for ...

   Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 13–30 : Автор(ы): Fedoulov, P.P., E. Murphy and K.E. Shulgovsky

10. Can we satisfactorily estimate variation in krill abundance?

    :  Knowledge of abundance and rates of change of abundance are basic requirements for fisheries models. Catch ... abundance and rates of change of abundance are basic requirements for fisheries models. Catch per unit ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 375-376 : Автор(ы): Everson, I.

Страницы