Résultats de la recherche
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Can we satisfactorily estimate variation in krill abundance?
Paper Title: Can we satisfactorily estimate variation in krill abundance? Abstract / Description ... per unit effort (CPUE) has traditionally been used in demersal fisheries assessments as an estimator ... to year variation in krill abundance it is important that this be quantified and separated from ... fishery induced variation. The timescale for such information is discussed in the light of the needs of ... SATISFACTORILY ESTIMATE VARIATION IN KRILL ABUNDANCE?* I. Everson1 (United Kingdom) Abstract Knowledge of ... effort (CPUE) has traditionally been used in demersal fisheries assessments as an estimator of ... variation in hill abundance it is important that this be quantified and separated from fishery induced ... variation. The timescale for such information is discussed in the light of the needs of fishery management ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 375-376 : Auteur(s): Everson, I.
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Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks (Subarea 48.3)
Paper Title: Notothenia (P.) guntheri stock status and TAC estimation in the area of Shag Rocks ... consideration the fact that in the 1986/87 season the recruitment in the first age group was not abundance of N ... . guntheri in 1987/88 was 152 thousand tonnes. Then the following TAC values were obtained: (a) Fishing ... intensity (F) in the predicted period is equal to the mean value of fishing mortality for the main ... TAC ESTIMATION IN THE AREA OF SHAG ROCKS (SUBAREA 48.3) K. Shust and R. Borodin Abstract Data ... correlation coefficients were the highest is the most preferable. Taking into consideration the fact that in ... the 1986/87 season the recruitment in the first age group was not abundance of N. guntheri in 1987/88 ... was 152 thousand tonnes. Then the following TAG values were obtained: ( a) Fishing intensity (F) in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 53-68 : Auteur(s): Shust, K. and R. Borodin
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Attribtuion of acoustic echoes to squid in the south Atlantic
Paper Title: Attribtuion of acoustic echoes to squid in the south Atlantic Abstract / Description ... : During a research cruise of the British Antarctic Survey ship RRS James Clark Ross in February 1996, more ... than 2 000 individuals of the ommastrephid squid, Martialia hyadesi, were caught in a single haul made ... by a pelagic trawl near the Antarctic Polar Frontal Zone in CCAMLR Subarea 48.3. This paper describes ... ATTRIBUTION OF ACOUSTIC ECHOES TO SQUID IN THE SOUTH ATLANTIC C. Goss, P. Rodhouse, J.L. Watkins and A.S ... RRS James Clavk Ross in February 1996, more than 2 000 individuals of the ommastrephid squid ... , Mavtialia hyadesi, were caught in a single haul made by a pelagic trawl near the Antarctic Polar Frontal ... Zone in CCAMLR Subarea 48.3. This paper describes the analysis of acoustic data gathered during this ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 259–271 : Auteur(s): Goss, C., P. Rodhouse, J.L. Watkins and A.S. Brierley
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Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae) off the Chilean coast
Paper Title: Hook selectivity in the longline fishery of Dissostichus eleginoides (Nototheniidae ... Chilean fisheries of the Patagonian toothfish, Dissostichus eleginoides is reviewed in order to study ... selectivity of different types and sizes of hooks used in longlines. Original data obtained during 1991 off ... % more efficient than hooks No. 4. Using different bait does not result in significant differences. It is ... WG-FSA-91/11 HOOK SELECTIVITY IN THE LONGLINE FISHERY ... , Dissostichus eZeginoides is reviewed in order to study selectivity of different types and sizes of hooks used ... in longlines. Original data obtained during 1991 off the coast of Valdivia, South East Pacific, are ... does not result in significant differences. It is worth noting that the ratio of females increases ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 107–119 : Auteur(s): Moreno, C.A.
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By-catch of fish in the krill fishery
Paper Title: By-catch of fish in the krill fishery Abstract / Description: Observations are ... results indicate that the by-catch of fish in the commercial krill fishery may be significant in some ... areas of the South Georgia shelf. The problem is thought to be least in open ocean krill fishing. File ... WG-KRILL-9l/25 BY·CATCH OF FISH IN THE KRILL FISHERY ... by-catch of fish in the commercial krill fishery may be significant in some areas of the South ... Georgia shelf. The problem is thought to be least in open ocean kriU fishing. Resume Observations ... in the Southern Ocean. Nearly all of the catches have been made using midwater trawls, which ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 381–401 : Auteur(s): Everson, I., A. Neyelov and Y.B. Permitin
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Precautionary measures for a new fishery on Martialia hyadesi (Cephalopoda, Ommastrephidae) in the Scotia Sea: an ecological approach
, Ommastrephidae) in the Scotia Sea: an ecological approach Abstract / Description: In anticipation of the ... development of a new fishery for the ommastrephid squid Martialia hyadesi in the Scotia Sea, this paper ... conservative estimate for total annual consumption of M. hyadesi by higher predators in the Scotia Sea is 245 ... spawns between autumn and mid-summer with peak hatching in winter/spring. Its life span has not been ... MEASURES FOR A NEW FISHERY ON MARTIALIA HYADESI (CEPHALOPODA, OMMASTREPHIDAE) IN THE SCOTIA SEA: AN ... United Kingdom Abstract In anticipation of the development of a new fishery for the ommastrephid ... squid Martialia hyadesi in the Scotia Sea, this paper presents a revision of annual consumption of the ... annual consumption of M. hyadesi by higher predators in the Scotia Sea is 245 000 tonnes, with an upper ...
Science Journal Paper : CCAMLR Science, Volume 4 (CCAMLR Science, Volume 4) : 125–139 : Auteur(s): Rodhouse, P.G
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Alternative methods for determining subarea or local area catch limits for krill in Statistical Area 48
Paper Title: Alternative methods for determining subarea or local area catch limits for krill in ... precautionary catch limit on krill (Euphausia superba) in Statistical Area 48. The measure also implies an ... application in future of precautionary limits to subareas or local areas of this area. Nine alternative ... current fishing patterns; and (vi) the potential for delay in implementing the alternative. An alternative ... SUBAREA OR LOCAL AREA CATCH LIMITS FOR KRILL IN STATISTICAL AREA 48 G. Watters and R.P. Hewitt ... (Euphausia superba) in Statistical Area 48. The measure also implies an application in future of ... patterns; and (vi) the potential for delay in implementing the alternative. An alternative is less likely ... information, but may not be practical in the near future. Alternatives based on continental shelf area ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 237–249 : Auteur(s): Watters, G. and R.P. Hewitt
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Calibration of an acoustic echo-integration system in a deep tank, with system gain comparisons over standard sphere material, water temperature and time
Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... a 120 kHz split-beam transducer in a refrigerated 10 m deep tank. Calibration parameters are studied ... in relation to sphere material (WC and Cu), water temperature (0.5 to 5.5°C), transmitted pulse ... length (0.1, 0.3 and 1.0 ms), target depth (0.8 to 7.5 m), and time (149 days). The total range in TS ... -INTEGRATION SYSTEM IN A DEEP TANK, WITH SYSTEM GAIN COMPARISONS OVER STANDARD SPHERE MATERIAL, WATER ... transducer in a refrigerated 10 m deep tank. Calibration parameters are studied in relation to sphere ... ), target depth (0.8 to 7.5 m), and time (149 days). The total range in TS gain, including the effects of ... between SA gain and TS gain. The total spread in SA gain, including the effects of temperature, standard ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Auteur(s): Demer, D.A. and R.P. Hewitt
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Trawl bag selectivity in the Champsocephalus gunnari fishery
Paper Title: Trawl bag selectivity in the Champsocephalus gunnari fishery Abstract / Description ... were carried out in June 1990 in the South Georgia area concurrently with trawl surveys as part of the ... from previous years demonstrates close similarity. A significant increase in modal length (up to 34-35 ... recommended in order to fully understand the mechanism involved. File: 18-Bidenko-and-Istomin.pdf ... WG-FSA-90/32 TRAWL BAG SELECTIVITY IN THE ... selectivity during fishing on pre-spawning concentrations of ChampsocephaZus gunnari were carried out in June ... 1990 in the South Georgia area concurrently with trawl surveys as part of the main biological and ... demonstrates close similarity. A significant increase in modal length (up to 34-35 cm) as well as earlier ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 295–312 : Auteur(s): Bidenko, V.G. and I.G. Istomin
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A preliminary assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea based on data from predators
Paper Title: A preliminary assessment of the stock of the ommastrephid squid Martialia hyadesi in ... Martialia hyadesi; will be attempted in the future. This squid is an important component of the diet of ... several species of albatross and the southern elephant seal and is probably taken in significant ... predators in the Scotia Sea is 326 098 to 330 642 tonnes, 94% of which is taken by southern elephant seals ... OF THE OMMASTREPHID SQUID MARTIALIA BY ADESI IN THE SCOTIA SEA BASED ON DATA FROM PREDATORS· P.G ... exploitation of the sub-Antarctic ommastrephid species Martialia hyadesi will be attempted in the future. This ... seal and is probably taken in significant quantities by several other Southern Ocean vertebrate ... predators. Estimated annual consumption by known predators in the Scotia Sea is 326 098 to 330642 tonnes ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 479–480 : Auteur(s): Rodhouse, P.G.