Résultats de la recherche
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Midwater trawl catchability in relation to krill and possible ways of assessing gross catch
methodology was developed for and applied to determining the rate of krill filtration through the trawl rope ... midwater trawls in the krill fishery indicates that the potential exists for this efficiency to be ... gross catch Abstract / Description: Research into midwater trawl catchability rates was carried out on ... as it passes through the trawl sides. Studies were based on the results of 250 hauls made with a 72 ... assessing gross catch by integrating the methods mentioned above. Yu.V. Zimarev was responsible for ... has been reduced to two systems of parallel lines, has produced the following expression for ... Rhomboid a=lOO (30) mm a=80(20)mm a=60 (18) mm 0.2 0.2 0.2 Hexagonal a=lOO (20) mm a=80 (14) mm a=60 ... 70 60 50 40 ~ 30 I» o ~ 20 g. f 10 \-l o 0,9 10,7 20,5 30,3 40,1 ~9.9 59,7 3 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 87–113 : Auteur(s): Zimarev, Yu.V., S.M. Kasatkina and Yu.P. Frolov
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Age and growth of Antarctic Euphausiacea (Crustacea) under natural conditions
Peninsula and the southeastern Weddell Sea. Life spans range from two years for Euphausia frigida to six ... years for the krill Euphausia superba. Growth in length and weight was calculated by non-linear ... eastern Weddell Sea. Former opinions that differ are discussed. Seasonal growth was re-analyzed for the ... species Euphausia triacantha, and a three-year life span proposed. Male Euphausia crystallorophias have a ...
Meeting Document : SC-CAMLR-VI/BG/24 : Auteur(s): V. Siegel (FRG)
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Acoustic survey design to estimate krill biomass in Subareas 48.1, 48.2 and 48.3
synoptic survey of krill biomass in Statistical Area 48. Example calculations are presented for estimating ... 1.25 ship-months of survey effort can provide an estimate of krill biomass in Subareas 48.1, 48. 2 and ... 48.3 with a CV of 20%. Author(s): Hewitt, R.P., Watters, G. Title: Acoustic survey design to estimate ... Abstract: The Scientific Committee has requested advice on the feasibility of conducting a ...
Meeting Document : WG-EMM-95/71 : Auteur(s): Hewitt, R.P., Watters, G.
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Analysis of the diet of Champsocephalus gunnari in Subarea 48.3, Dr E. Holmberg survey, February 1995
empty stomachs (also at Shag Rocks), close to the values reported for years of krill scarcity. While no ... , an acoustic survey carried out in the same area in March 1995 detected such aggregations. It is ... suggested that krill availability for C. gunnari around South Georgia in the 1995 summer season, was ... krill availability indicated by frequency of occurrence, but, on the other hand, high proportions of ...
Meeting Document : WG-FSA-95/36 : Auteur(s): Marschoff, E., Barrera-Oro, E., Casaux, R.
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The effects of global climate variability in pup production of Antarctic fur seals
Antarctic fur seal pup production at South Georgia over a 20-year period in response to environmental ... reductions in Antarctic fur seal pup production over 20 years of study. Simulated environmental time series ... Abstract: Climate variability has strong effects on marine ecosystems, with repercussions that ... suggested that the effect of anomalies on Antarctic fur seals was only detectable within a narrow range of ...
Meeting Document : WG-EMM-06/P2 : Auteur(s): J. Forcada, P.N. Trathan, K. Reid and E.J. Murphy (United Kingdom)
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The survivorship of rays discarded from the South Georgia longline fishery
/ Description: Post-haulage survival experiments were conducted on 95 Raja sp. anon. cut off longlines at the ... season in Subarea 48.3. Capture depth had a consistently significant influence on the mortality of skates ... ) and the sex of rays also had some small influence on survivorship. Discard survivorship was 75% in ... can also be used to calculate the expected skate mortality within the fishery, based on depth of ... 12 hours, adjusted for the ‘50% survivorship’ category of Table 1. 0% 20% 40% 60% 80% 100 ... vessel for a period of up to 12 hours. Eight insulated experimental tanks were instal- led on the ... oxytetracycline (OTC) for future growth validation on recapture. These animals were released back into the open ... a spline on depth established that a three-order polynomial was a good approximation for the depth ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 155–164 : Auteur(s): Endicott, M. and D.J. Agnew
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Status of the krill stock around Elephant Island in 1991/92 and 1992/93
. The length frequency distributions and maturity stage composition reflected relatively good year class ... success from the 1990/91 spawning season but poor success from 1991/92. Year class success from these and ... austral summers of 1991/92 and 1992/93 are described and compared with information from previous years ... other years appears to be associated with female maturity development and spawning during the early ... maturity development during early summer is an important factor influencing year class success, due to ... recruitment for the 1991/92 year class. The apparent failure of the 1991/92 year class supports this ... . Loeb and Siege1 (Dlink/Dmax) *l00 Variable 1---10---20---30---40---50---60---70---80---90---~00 ST ... ST-4 3 ST-59 -7 ST-58 -L ST-71 ST-4 4 ST-72 (Dlink/Dmax)*100 Variable 1---10---20---30---40 ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 7–33 : Auteur(s): Loeb, V. and V. Siegel
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Some specific features of the USSR krill fishery and possibilities of applying fishery statistics to studies of krill biology and stocks
the vessel rather than with krill abundance in a certain area. During preparations for regular fishing ... -term behaviour patterns have an impact. All these factors limit the extent to which CPUE can be used in ... instrument for studies. File: 04-Dolzhenkov-et-al.pdf ... operations very short hauls (under 15 minutes) are practised. Such fishing practice, together with ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 237–252 : Auteur(s): Dolzhenkov, V.N., T.G. Lubimova, R.R. Makarov, S.S. Parfenovich and V.A. Spiridonov
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Age and growth of Antarctic euphausiacea (crustacea) under natural conditions
Peninsula and the south-eastern Weddell Sea. Life spans range from two years for Euphausia frigida to six ... years for the krill Euphausia superba. Growth in length and weight was calculated by non-linear ... eastern Weddell Sea. Former opinions that differ are discussed. Seasonal growth was re-analyzed for the ... species Euphausia triacantha, and a three-year life span proposed. Male Euphausia crystallorophias have a ... south-eastern Weddell Sea. Life spans range from two years for Euphausia frigida to six years for the ... . Former opinions that differ are discussed. Seasonal growth was re-analyzed for the species Euphausia ... triacantha, and a three-year life span proposed. Male Euphausia cr¥stallorophias have a shorter life span ... least twice and in some cases three times during their life, except for E. frigida which spawns only ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 369-370 : Auteur(s): Siegel, V.
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WG-FSA-10
Proposal for an extension to the mark-recapture experiment to estimate toothfish population size in the ... Rev. 1 Evaluating the impact of multi-year research catch limits on overfished toothfish populations ... -10/44 Brief report on results of experimental harvest regime for the exploratory fishery for crab in ... -10/P06 Estimating the impact of depredation by killer whales and sperm whales on longline fishing for ...
Meeting