Résultats de la recherche
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Growth and natural mortality of Patagonian rockcod (Patagonotothen guntheri shagensis) from Shag Rocks shelf
for Patagonian rockcod (Patagonotothen guntheri shagensis) were calculated by using age and length ... of natural mortality M=0.8 was used in calculations and the optimal age and length for harvesting ... Patagonian rockcod were found to be 2.5 years and 12.6 cm. File: 09-Shilbanov.pdf ... years The analysis of the age composition curve shows that not all two year old fish were represented ... the optimal age and length for harvesting Patagonian rockcod were found to be 2.5 years and 12.6 cm ... of 2 to 5 years are most abundant. Sexual maturity is attained by fish at 11 to 13 cm length, 20 to ... 30 g weight and age of 2 to 3 years. The sex ratio of fish is actually the same in all size classes ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 111–121 : Auteur(s): Shlibanov, V.I.
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Changes in the fish biomass around Elephant Island (Subarea 48.1) from 1976 to 1996
from 1978/79 to 1988/89, with most of the commercial harvesting taking place in the first two years of ... for finfishing from 1989/90 onwards. Results of the first bottom trawl survey carried out after the ... class; fish from this year class were 20 to 25 cm long in January/February 1976 and 30 to 37 cm in ... target of an exploratory fishery in the Peninsula region. Biomass estimates for these species are ... provided in Tables 3 to 10. Two main features are apparent: biomass estimates for most species were ... exhibited considerable year-to-year variation (Figure 2) . Length compositions for 1976 and 1978, which ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 165–189 : Auteur(s): Kock, K.-H
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Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at night. In ... ..' .::', .. .. ····<····2·0·00 m 200 m Figure 2: Subsurface (30 to 35 m depth) currents derived from the paths of two ... ;, () 20 30 40 50 60 ~~~~~ ~ ~~~~£1 " " " " Body length ( mm ) Maturity stages Figure 5: Body length and ... , tending to be at a deeper range from 50 to 100 m in the day while at a shallower range from 20 to 50 m at ... 50 a 100 m de jour alors qu'il frequente une couche moins profonde, de 20 a 50 m de nuit. Au large ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Auteur(s): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
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Factors affecting the incidental mortality of seabirds in the Dissostichus eleginoides fishery in the southwest Atlantic (Subarea 48.3, 1995 season)
analyses all incidental mortality of seabirds recorded on Argentinian and Chilean vessels fishing for ... of concern for the linked to an increase in fishing effort in the Commission for the Conservation ... differed. For example, to calculate the effect of the streamer lines, hauls were chosen from an area in ... the Southern Hemisphere, it fails to place an actual value on the incidence of this problem due to ... was demonstrated by the large amount of information obtained by two observers on board a Chilean ...
Science Journal Paper : CCAMLR Science, Volume 3 (CCAMLR Science, Volume 3) : 79–91 : Auteur(s): Moreno, C.A., P.S. Rubilar, E. Marschoff and L. Benzaquen
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Homogeneity of body length composition of Antarctic krill within the commercial zone
=163 x=51.7 20 30 40 50 60 Length (mm) Figure 2: Comparisons of kriU length compositions for ... x=47.2 20 Data set 2* 30 40 50 Length (mm) 60 15 10 5 n=182 x=48.7 n=187 x ... " 10 CD x=38.9 x=37.5 l0- w.. 5 0 20 30 4D 50 60 Data set 53* Data set 49** ..-.. 15 ~ n ... .. 10 x=42.0 x=44.5 5 0 20 30 40 50 60 Length (mm) Leng t h (mm) Figure 2 (continued) 24 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 17–28 : Auteur(s): Ichii, T.
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Distribution, morphology and ecology of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) in the Ross Sea region
as M. whitsoni. The first comparison of the distribution and ecology of the two species of Macrourus ... teeth in the lower jaw allowed the two species to be distinguished both in the laboratory and by ... . whitsoni caught with depth. Catches of females of both species exceeded that of males (especially for M ... . caml). Macrourus caml grows slower, reaches a larger size, lives longer and is heavier for a given ... . Evidence of feed- ing on the seabed for M. caml was found: fragments of coral, an echinoderm, parts of an ... and weighed them, and then returned whole fish frozen below –20°C to the laboratory for analysis ... about 20% heavier for a given length than M. whitsoni. Length of intestine The length of intestines ... the same age (Figure 7). For M. caml, females greatly outnumbered males of the same age up to an age ...
Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 37–61 : Auteur(s): Pinkerton, M.H., P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown
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Results of fish larvae sampling by means of fine-meshed samplers attached to a bottom trawl
sized meshes for sampling larvae in the bottom zone and the resistance of the samplers to damage during ... order to provide information on the composition, distribution and abundance of Antarctic fish larvae in ... Georgia. Low values of the abundance index, including most of zero catches, were recorded on the western ... : 134 p. 73 Table 1: Station 19 20 22 24 25 26 30 31 32 33 34 35 36 37 38 45 ... WG-FSA-88/20 RESULTS OF FISH LARVAE SAMPLING BY MEANS ... not sampled using plankton nets. The efficiency of various sized meshes for sampling larvae in the ... in a random stratified design and an additional fifteen hauls conducted within commercially ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part II) : 69-86 : Auteur(s): Ślósarczyk, W. and I. Wójcik
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Trawl bag selectivity in the Champsocephalus gunnari fishery
to the limited time available for experiments, should be considered as preliminary. L 50% was 24.8 cm ... and the selectivity factor was 3.10 for a mesh size of 80 mm. Comparison of these results with results ... : Experiments on trawl bag selectivity during fishing on pre-spawning concentrations of Champsocephalus gunnari ... main biological and oceanic research program. The results presented here are based on 29 hauls and, due ... AND AREA Selectivity hauls were made from 17 to 20 June 1990 in an area having the mean coordinates ... - 7 19 - 16 20 30 38 21 - 20 22 - 20 23 - 24 24 38 64 25 534 373 26 1436 866 27 2984 1430 28 ... was 3.10 for a mesh size of 80 mm. Comparison of these results with results from previous years ... the trawl bag (based on measurements of all meshes along its length) to be: • for models with ...
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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Age and growth of spiny icefish (Chaenodraco wilsoni Regan, 1914) off Joinville–D’Urville Islands (Antarctic Peninsula)
1–5 years for males and 1–4 years for females of C. wilsoni. Applying the von Bertalanffy (VB ... males. Age-at-sexual maturity was estimated to be about 2 years for females and 2.5 years for males ... selected for the study, consisting of 120 females and 98 males. The age of fish was estimated by counting ... ) growth function to the age–length data, a growth curve was obtained for each sex. The estimated values of ... dominated by a strong peak at 26 cm TL, with two other well-defined modes at 20 and 30 cm TL (Figure 3b ... ., 2007). As a rule, the net was generally towed at about 3–3.5 knots for 30 min on the bot- tom during ... population (c). 0 5 10 15 20 25 30 35 40 0 1 2 3 4 5 6 Age (years) To ta l l en gt h (c m ) a(a ... 20 25 30 35 40 0 1 2 3 4 5 6 Age (years) To ta l l en gt h (c m ) c(c) Age (years) To ta ...
Science Journal Paper : CCAMLR Science, Volume 16 (CCAMLR Science, Volume 16) : 115–130 : Auteur(s): La Mesa, M., A. De Felice, C.D. Jones, K.-H. Kock
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Cephalopod research in the Antarctic
trophic relations. However, there is insufficient information at present for CCAMLR to formulate effective ... policy for management of Antarctic cephalopods. In view of the rapidity that cephalopod fisheries can ... develop there is need for co-ordinated international research effort. Any commercial fishing for ... of future commercial exploitation. Research is being carried out at BAS on the species composition ... Antarctic Living Marine Resources (CCAMLR) should be preparing plans for an effective management strategy ... data in turn may be useful, in the future, for predicting year class strength of exploited species ... successfully raised in rabbits and testing is being carried out for cross reactions with other pelagic ... Cephalopoda as well as publishing a newsletter. It provides an international forum for scientific exchange ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 323-334 : Auteur(s): Rodhouse, P.G.