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Guidelines for the preparation of hydroacoustic survey reports on krill
surveys. The unification of echometric survey data is aimed at increasing the effectiveness of research on ... Paper Title: Guidelines for the preparation of hydroacoustic survey reports on krill Abstract ... / Description: The proposed guidelines provide an opportunity to perform comparative analyses and checks of ... results obtained during echometric surveys of fish and krill, and to establish a data bank of these ... echometric survey data is aimed at increasing the effectiveness of research on the· quantitative assessment ... PREPARATION OF HYDROACOUSTIC SURVEY REPORTS ON KRILL I.L.Kalikhman (U.S.S.R.) Abstract The proposed ... guidelines provide an opportunity to perform comparative analyses and checks of results obtained during ... echometric surveys of fish and krill, and to establish a data bank of these surveys. The unification of ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 165-193 : Autor(es): Kalikhman, I.L.
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A simulation study of krill fishing by an individual Japanese trawler
Paper Title: A simulation study of krill fishing by an individual Japanese trawler Abstract ... / Description: A model is set up for the operation (which includes both searching and fishing) of a Japanese ... parameters are determined primarily from the scientific FIBEX surveys. Output from the model of the operation ... is compared with (and partially tuned to) statistics for a sample of data from the commercial fishery ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 1–108 : Autor(es): Butterworth, D.S.
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Results of fish stock assessment survey, South Georgia region, November - December 1986
Paper Title: Results of fish stock assessment survey, South Georgia region, November- December ... 1986 Abstract / Description: Biomasses and length compositions of eight stocks from South Georgia are ... described based on results of a stratified random bottom trawl survey. A total of 124 tows were undertaken ... . Biomass was estimated based on stratified swept-area calculations. Estimates of biomass of Notothenia ... at Hel, Institute of Oceanography, Gdansk University Poland have not had the opportunity to review ... occurred at 97% of the South Georgia stations and 73% of the Shag Rock stations. Largest catches were ... ) contributing 9% of total catch. Total biomass near South Georgia was estimated at approximately 13 500 mt ... hauls contributed 98% of the total biomass caught of this species. The species also occurred at shag ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 143-183 : Autor(es): Gabriel, W.L.
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Myctophids in the diet of Antarctic predators
Paper Title: Myctophids in the diet of Antarctic predators Abstract / Description: The aim of ... the present study is to review published data on the diet of various top predators (birds, seals ... , whales, fish and squids) in order to help evaluate the importance of myctophids in their diets. This ... contained some information on the myctophid component of the diet of Antarctic predators. Myctophids were ... 3.3 to 8.4% by weight ofmyctophids. Fish comprised at about 75% (73.3 to 77.9%) of its diet. The ... to distinguish. All these species of myctophids have circumpolar distribution at least in the APF ... Island, but this might reflect differences in the timing and duration of field studies. Observations at ... conducted in November/December when E. carlsbergi is absent in the diet of king penguins at two other ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 335–368 : Autor(es): Sabourenkov, E.
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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 ... the analysis of acoustic data gathered during this haul and a survey of the immediate vicinity, in ... elephant seals breeding on the South Atlantic Island of South Georgia, led scientists at the British ... extensive horizontal track, it was carried out at a single depth, which reduced the number of potential ... , usually seen in the vicinity of South Georgia. The absence of any other strong echoes during the haul at ... characterise the echosignals of any squid caught in a pelagic net. The pelagic trawl, towed at between three ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 259–271 : Autor(es): Goss, C., P. Rodhouse, J.L. Watkins and A.S. Brierley
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Status of krill target strength
Paper Title: Status of krill target strength Abstract / Description: Empirical estimates for the ... target strength of krill are extracted from publications. These are confined to measurements on ... aggregations of live euphausiids and should not be affected by a frequent cause of bias in single-animal ... -cylinder scattering model assuming specific sets of physical and orientational parameters, for which there ... , measurements of kriU target strength have been quite scarce. In fact, at the time of the Post-FIBEX Acoustic ... expressed in SI units. The TS of an idealised, perfectly reflecting sphere of 2 m radius at very high ... were in a large concentration just north of South Georgia at the time of measurement in March 1980 ... ) specifies two TS numbers: -81.3 dB in the daytime and -89.2 dB at night-time. Tabulation of Sv values ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 101–126 : Autor(es): Foote, K.G., D. Chu and T.K. Stanton
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CPUE indices used in Soviet krill fishery statistics from 1977 to 1992 and their possible utility for evaluation of relative changes in krill biomass
possible utility for evaluation of relative changes in krill biomass Abstract / Description: Key catch-per ... -unit-effort (CPUE) indices used in Soviet krill fishery statistics, as well as the main sources of data ... -days fished (CVDF), catch per extended vessel-days fished (CEVDF) and catch per hour of trawling (CHT ... ). A relatively high correlation between mean monthly values of CVDF and CEVDF, and CVDF and CHT was ... ) (Figure 2). The CC between the mean monthly values of CVDF and CHT was relatively high, at 0.768586 ... processing krill for other types of product aimed only at maximising catches. (ii) Vessels producing ... iv e of th e w ho le d at as et a cc or d in g to th e R IF s ta ti st ic s ... rn a nd e as te rn ) of k ri ll fl ee t co nc en tr at io n (‘ ba si c fi sh in ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 165–177 : Autor(es): Litvinov, F.F., A.Z. Sundakov and V.I. Arkhipov
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Results of a longline survey on seamounts in the southeast Atlantic and in Subarea 48.6 and Division 58.4.4
Paper Title: Results of a longline survey on seamounts in the southeast Atlantic and in Subarea ... October and 1 December 1997, and several seamounts were surveyed to the south of Africa: close to the ... of Bouvet Island, Ob and Lena Banks). Samples were collected from longlines set perpendicularly to ... toothfish (Dissostichus eleginoides), with 2 822 individuals caught (83% of total catch). Grenadiers of the ... m. The number of longline sets at each seamount was determined by seabed topography, and at least ... two sections of the slope around each seamount were sampled. Longlines were set at night, and soak ... -Smirnov test for large samples. The critical values were obtained at the 0.05 level of significance ... catches of D. eleginoides and Macrourus spp. At the same time, differences were observed in the density ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 99–116 : Autor(es): López Abellán, L.J. and J.F. González Jiménez
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An index of per capita recruitment
Paper Title: An index of per capita recruitment Abstract / Description: An index of per capita ... recruitment (PCR) is proposed such that where R 1 is the proportion of age-l animals sampled in year y and M ... is the post-recruit mortality rate. The intent of the index is to facilitate investigation of ... reproductive success and the factors postulated to affect it. The formulation of PCR is based on the ... , 1 000 values were drawn at random and PCR calculated for several levels of M. When R1 followed a ... growth. Small changes in the assumed value of M, particularly at high levels, will not greatly affect ... the value of PCR over the normal range of RI. The effect will become greater, however, at very high ... mortality (M) of krill was between 0.88 and 0.96 from catch-at-age data. Priddle et al. (1988) estimated M ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Autor(es): Hewitt, R
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A fine-scale model of the overlap between penguin foraging demands and the krill fishery in the South Shetland Islands and Antarctic Peninsula
Paper Title: A fine-scale model of the overlap between penguin foraging demands and the krill ... using the total catch of krill taken within 100 km of penguin colonies in their breeding season ... (December to March) as an index of overlap between the potential foraging areas of penguins and the ... distribution of the krill fishery in Subarea 48.1 (South Shetland Islands). As this index has proven unsuitable ... distances of 11 to 24 km at bearings between 330" and 033" for chinstrap penguins, and 20 to 40 km at ... to be foraging within the minor unit at any time was determined as where P, is the total number of ... pairs in colony t of colonies (only one bird from a pair is assumed to be foraging at any one time ... unit and z is the area of the arc of angle theta which contains the M, defined as being at distances ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 99–110 : Autor(es): Agnew, D.J. and G. Phegan