Search results
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Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
not been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... L t is the pelvic length (PL) in centimetres at age t years. Applying this growth curve to the estimated lengths ... of 6–7 years for males and 8–11 years for females. These estimates are near the middle to upper end ... not been validated. The maximum estimated age was 14 years, but this should be regarded as a conservative ... validated. The maximum estimated age was 14 years, but this should be regarded as a conservative estimate ... (PL) in centimetres at age t years. Applying this growth curve to the estimated lengths at maturity ... for males and females (64 and 66–69 cm PL respectively) produced estimated ages at maturity of 6–7 years ... for males and 8–11 years for females. These estimates are near the middle to upper end of the range of ages ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Author(s): Francis, M.P. and C. Ó Maolagáin
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Supplementary data on exploited stocks in Division 58.5.1 (Kerguelen)
Notothenia squamifrons 6bIJI OqeHb HH3KHM.CO BpeMeHH YCTaHOBJIeHH5.I ;;\KOHOMHqeCKOH 30HbI Ha6JIIO ... . An assessment of the biomass of individuals aged more than three years present over the Kerguelen Shelf ... of the stock in five years. The implementation of conservation measures does not, however, always allow ... of adult stock of three or four years earlier, which are caught in the trammel nets. Then a gradual ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 147–161 : Author(s): Duhamel, G.
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Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region
, despite substantial catches in the first four years of the fishery and ample opportunity to sample ... these catches. The only scientific surveys of these stocks during these years were conducted by Germany in 1985 ... fishing since the closure of the region some 10 years ago. Differences in length-weight relationships ... one year or more, whereas in others gonad maturation was completed within one season. Length at sexual ... of G. gibberifvons belonging to age classes 0-2 (Figure 6) were caught in some numbers in waters of 20-30 m off ... , despite substantial catches in the first four years of the fishery and ample opportunity to sample ... these catches. The only scientific surveys of these stocks during these years were conducted by Germany in 1985 ... no evidence of illegal fishing since the closure of the region some 10 years ago. Differences in length ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Author(s): Kock, K.-H., C.D. Jones and S. Wilhelms
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Assessments of by-catch in trawl fisheries at Heard and McDonald Islands
the total by-catch in a year to the estimates of long-term annual yield, (ii) allowing catches of by-catch ... the total by-catch in a year to the estimates of long-term annual yield, (ii) allowing catches of by-catch ... at the end of 20 years of exploitation should be 75% of the pre-exploitation spawning biomass ... over a 20-year period. The lowest y satisfying these rules was determined for the three projections ... could be a combination of (i) limiting the total by-catch in a year to the estimates of long-term ... C. rhinoceratus 5.142 E-10 3.398 2 561 0.95 B. irrasa %N %kg 1 5 4 4 16 30 2 7 35 1 3 Skates ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 231–243 : Author(s): Constable, A.J., R. Williams and W.K. de la Mare
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Annual changes in species composition and abundance of myctophid fish in the north of South Georgia (Subarea 48.3), Antarctica, during austral winters from 2002 to 2008
with a horizontal open- ing of ca. 20 m and a vertical opening of ca. 30 m was used throughout the survey. Inner ... : (a) Protomyctophum choriodon. (continued) A 0% 10% 20% 30% 40% 50% 60% 70% 40 50 60 70 80 90 Standard ... (n = 20) 2004 (n = 33) 2008 (n = 643) 70 60 50 40 30 20 10 0 P er ce nt ag e co m po si ... 90 Standard length (mm) (a) Iwami et al. 160 C 0% 10% 20% 30% 40% 50% 60% 20 30 40 50 ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 155–163 : Author(s): Iwami, T., M. Naganobu, K. Taki and M. Kiyota
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Estimating krill recruitment and its variability
rate for 1+ krill (the ratio of the number of krill aged one year to the number of krill aged one year ... for 2+ krill (the ratio of the number of two-year-old krill to the number aged two and above) from nine surveys ... a mean recruitment rate for 1+ krill (the ratio of the number of krill aged one year to the number ... of krill aged one year and above) of 0.339 with a standard deviation (SD) of 0.100. The corresponding ... of surveys show very low densities of putative one-year-olds. Either these animals were indeed largely ... 9 8 7 6 h Y .M 5 a 4 3 2 1 0 0 10 20 30 40 50 60 70 Length (mm) Figure 1: Schematic mixture distribution generated from five ... expected for Antarctic krill. 0 10 20 30 40 50 60 Length class (mm) Figure 2: Fit of a mixture ... l Estimating Krill Recruitment and its Variability 20 30 40 50 60 Length (mm) 100 90 Nella Dan: ADBEX ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 55–69 : Author(s): de la Mare, W.K
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Marine debris and fishing gear associated with seabirds at sub-Antarctic Marion island, 1996/97 and 1997/98: in relation to longline fishing activity
6onbruoe Bo3paCTaHHe MeXAy IIoneBbIMH Ce30HaMH 1996197 H 1997198 r r . B TOT nepr?on npoMbrcnoBbIe ... unregulated and sanctioned longline fishing for Patagonian toothfish within the 20 n mile Economic Exclusive ... -chinned petrel chick stomach had a 59 cm monofilament nylon snood attached to it, and together had ... AND CONCLUSIONS Entanglements Incidental Finds Four seabird entanglements were observed during the two years ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 85–96 : Author(s): Nel, D.C. and J.L. Nel
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Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003
petrels is explained by the time of year, geographical area and type of longliner (manual versus automatic ... of the mortality of white-chinned petrels and grey petrels is explained by the time of year, geographical area ... petrels is explained by the time of year, geographical area and type of longliner (manual versus ... of seabirds in these areas. Materials and methods Collection of data The fi shing year extends from ... in the analysis of incidental mortality. Parameters Data Year Year 2001/02: from 11 September 2001 to 27 July ... 2002 Year 2002/03: from 1 September 2002 to 31 August 2003 Season Summer (September to April ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 53–80 : Author(s): Delord, K., N. Gasco, H. Weimerskirch, C. Barbraud and T. Micol
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Analysis of albatross and petrel distribution within the CCAMLR Convention Area: results from the Global Procellariiform Tracking Database
for the estimation of distribution during the breeding season for all 20 albatross, petrel and shearwater species ... two colonies, together rep- resenting <1% of the population of this species, and for this reason ... also been identified as varying between years, though analysis suggests that while differences do ... periods that apply to Subarea 48.3 (open 1 May–31 August, closed 1 September–30 April). Assessment ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 143–174 : Author(s): BirdLife International (prepared by C. Small and F. Taylor)
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Line weights of constant mass (and sink rates) for Spanish system Patagonian toothfish longline vessels
in bun- dles by netting bags stitched together from trawler net. This is an antiquated line-weighting ... , with each basket containing two lengths of hook line. The lengths of hook line are tied together to form ... - eter polypropylene hauling line, 8 mm diameter polypropylene branch/connecting lines (20 m long ... was sepa- rated by 100 m of connecting line (hookless fishing line), which took 30 s to pay out ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 93–106 : Author(s): Robertson, G., C.A. Moreno, E. Gutiérrez, S.G. Candy, E.F. Melvin and J.P. Seco Pon