Search results
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Sensitivity investigation of the SDWBA Antarctic krill target strength model to fatness, material contrast and orientation
. In this study, the SDWBA TS pattern and frequency response behaviours at standard survey frequencies and animal ... and the distribution of animal orientations. Due to the high variability of TS to realistic changes in parameters ... at standard survey frequencies and animal lengths are explored via a sensitivity analysis of some important ... the organism and the surrounding seawater and the distribution of animal orientations. Due to the high ... parameters. One approach is to describe the animal’s body by digitising the main morpho- logical structures ... and lateral aspects with respect to the trans- ducer. When the animal orientation was away from these aspect ... of the new SDWBApack age2010 was evaluated using sensitivity tests of some parameters with regard to krill ... no ta tio n in t hi s pa pe r (S ym bo l) an d SD W B A pa ck ag e2 00 50 60 3 al ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 97–122 : Author(s): Calise, L. and G. Skaret
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e-cc-v.pdf
... of determining the mesh size in accordance with Article 5 when using a weight or dynamometer, one series of 20 ... for in Article 6. ARTICLE 6. Sequence of inspection procedure 1. The inspector shall measure one series ... in the follow-up of the Workshops on Fish Ecology and Krill Physiology and Biochemistry (as regards krill age ... and report the number, species, and where appropriate the age or size, sex and reproductive status, of any ... ends on 7 April 1987. In order to implement Article XIX. 3 in the 1987 budget year, the Commission ... meeting, the Republic of Korea, India and Brazil had notified the Depositary Government on 20 September ... , the financial contributions to the Commission shall be determined on the basis of two criteria: the ... Workshops on Fish Ecology and Krill Physiology and Biochemistry (as regards krill age and growth), and in
application/pdf attached to:CCAMLR-VMeeting Report : CCAMLR-V
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e-sc-xviii-a5.pdf
... , three complete electronic observer logbooks were submitted, two from Chilean observers and one from ... ............................................................................ 236 Catch, Effort, Length and Age Data Reported to CCAMLR............................. 236 Estimates ... ........................................................................... 246 Age Determination......................................................................... 246 ... resolved. At the meeting it became clear that one problem remained, the specification of water depth ... split-year had been submitted; data from Spain were submitted on 233 20 October 1999. Where ... 1997/98 split-year are shown in parentheses. Information on catches in EEZs outside the Convention ... WORKING GROUP ON FISH STOCK ASSESSMENT (Hobart, Australia, 11 to 21 October 1999) CONTENTS Page ... Commentary on Estimated Total Removals of, and IUU Fishing for, Dissostichus spp
application/pdf attached to:WG-FSA-99Meeting Report : WG-FSA-99
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Scientific Abstracts 1992
for 1928 and 1970 to 1976 were calculated on the basis of summary data on krill age groups defined by means ... earlier used only in fish stock assessments. As a result of uncertainty in age groups, estimates had ... : (i) with pack-ice covering much of the area; and (ii) one week after ice had receded. Dense aggregations ... to six different families and 16 species (six channichthyids, four nototheniids, three myctophids, one ... submitted at the 1992 meeting of the Working Group on Krill). Unpublished papers must not be cited without ... written permission of the author(s). Addresses of principal authors are given for this purpose. ...
Document : Site Section: Publications
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e-sc-xi-a5.pdf
... /X). 6.48 The 5 year old age group, predicted as abundant by the VPAs presented at WG-FSA-91 comprised ... 1985/86 and 1989/90 were made, in order to compare the projected age distribution with the observed ... selection at age 2). 6.59 Annual recruitment R, was generated independently for each year on each run ... would therefore be less dependent on the assumed size of the recruitment of one year olds in 1991/92 ... an invitation for one scientist to participate as an invited observer on board the vessel. 6.24 ... most important finfish resource on the South Georgia shelf. In recent years the C. gunnari catch has ... seasons. High localised catch rates in some years were indicative of the presence of aggregations on the ... year classes, with potentially severe effects on a population already apparently under considerable
application/pdf attached to:WG-FSA-92Meeting Report : WG-FSA-92
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e-sc-xx.pdf
... ; Ukraine, three to four vessels catching ~40 000 to 50 000 tonnes; Uruguay, one vessel; USA, two vessels ... participants, representing 14 Members. • A Workshop on Estimating Age in Patagonian Toothfish (Dissostichus ... and the Workshop on Estimating Age in Patagonian Toothfish are included in Annex 5. Fisheries 1.9 CCAMLR ... catching ~65 000 tonnes; Republic of Korea, one vessel catching ~8 000 tonnes; Poland, three vessels ... was attended by 30 participants, representing 14 Members. • A Workshop on Estimating Age in ... ...................................................................................... 28 Surveys of Marine Debris on Beaches .................................................... 30 ... and that of WG-FSA as Annex 5. Reports from WAMI and the Workshop on Estimating Age in Patagonian ... (Subareas 48.1, 48.2 and 48.3). On board every vessel (or at least on board one vessel of the group
application/pdf attached to:SC-CAMLR-XXMeeting Report : SC-CAMLR-XX
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e-sc-x-a6.pdf
... structure used in WG-FSA-91/15, determined over a number of years and based solely on two age/length keys ... tuned to both standardised catch/effort indices by age group between 1982/83 and 1989/90 and survey ... presented to the Working Group in 1990 and 1991. 7.39 The catch-at-age data used in the two assessments ... were different in some years due to differences in the application of age/length keys and length ... catch-at-age structure used in WG-FSA-91/15, determined over a number of years and based solely on two ... received by the Convener and he tabled them on behalf of Drs Shust and Gasiukov. One further USSR paper ... Discussion centred on two aspects of the scheme: firstly on practical aspects of the implementation of the ... on sex and maturity stage; (iii) collections of otoliths for age determination; (iv) observations
application/pdf attached to:WG-FSA-91Meeting Report : WG-FSA-91
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Seals: Trophic modelling of the Ross Sea
seal attacks appear to fall off dramatically after crabeaters reach one year of age. Sexual maturity ... in February (Blix & Nordøy 2007). Ross seals are thought to reach sexual maturity at age 3 years ... is reasonable as a first approximation. We estimate values of 60% seals breed each year, one young per pair per ... ). Crabeater seals are considered to be the most abundant seal species and one of the most numerous large ...
Document : Site Section: Publications
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e-sc-x-a7.pdf
... did not relate significantly to foraging trip duration). In neither year did maternal age or size ... birds will be one sex or the other will be consistent from year to year for a specific site ... . A report on his results should be available in about one year. 4.44 It was noted that several ... may be related to variations in distance to the pack-ice edge. Standard Method A4: Age-Specific ... -year’ entry on all forms (the second year in a split-year should be used as the designator) and with ... focussing on the specific needs of CEMP (approximately two days). 4.48 The Working Group agreed that the ... . 4.50 The Working Group agreed that the two-day session focussing on the specific needs of CEMP should ... precautionary catch limits calculated by WG-Krill may be based on data for a year of relatively high krill
application/pdf attached to:WG-CEMP-91Meeting Report : WG-CEMP-91
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e-sc-xix-a5.pdf
... are presented in Table 8. Two clear markets are now emerging: one market for landings with a Dissostichus catch ... .................................................................................... 285 Catch, Effort, Length and Age Data Reported to CCAMLR ...................................... 285 ... . ..................................................................................... 293 Age Determination Methods ... ) and one in Division 58.4.4 (Isla Alegranza) was overdue (data from the Lyn and Isla Alegranza were ... illegal fishers are also present year-round from information presented to the intersessional subgroup on ... Working Group noted that on the basis of information available, the two French observers deployed in ... or under low visibility conditions; (xi) increased number of cruises with two observers on board: 8 ... THE WORKING GROUP ON FISH STOCK ASSESSMENT (Hobart, Australia, 9 to 19 October 2000) 277
application/pdf attached to:WG-FSA-00Meeting Report : WG-FSA-00