Search results
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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 : Author(s): Sabourenkov, E.
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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 : Author(s): López Abellán, L.J. and J.F. González Jiménez
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Performance and geometry of the FP-120 trawl used during UK fish stock assessment surveys around South Georgia, Subarea 48.3
Paper Title: Performance and geometry of the FP-120 trawl used during UK fish stock assessment ... opening (and, thus, swept area) of a bottom trawl are discussed. In situ measurements of the FP-120 trawl ... presented. Regression equations for the estimation of horizontal opening from other, more easily measured ... around South Georgia are estimated using a new regression equation. The results of this calculation are ... , swept area S can be estimated at the ith location by: start and end of each tow using a Furuno GPS ... mounted at the midpoint of the headline. Additional floats were attached to counteract the negative ... fixing of the Scanmar sensors on the FP-120. Pilling and Parkes The sensors were deployed at 29 of ... measurements of the horizontal opening resulted. The mountings of the sensors were checked at the end of each ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 51–69 : Author(s): Pilling, G. and G. Parkes
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Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
Paper Title: Effect of line sink rate on albatross mortality in the Patagonian toothfish longline ... vessels to derive a sink rate and line-weighting regime that would minimise the capture of albatrosses ... based on knowledge of line sink rates and albatross diving abilities. Sink rates of lines deployed into ... propeller turbulence, which tended to keep lines aloft, varied as a function of distance between line ... results of experiments are to be meaningful. This is particularly so in the case of experiments aimed at ... a line length on the seabed of about 13 km (depending on slack in the line). The line was set at ... at 5.5-6.5 knots and bait shooting rate, which varies as a function of setting speed and snood ... within 70 m of weights attached to the mother line at 1 600 m intervals. Branch lines were 18 m in ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Author(s): Robertson, G.G
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Investigations of required sampling regimes for environmental parameters
Paper Title: Investigations of required sampling regimes for environmental parameters Abstract ... / Description: The sensitivity of different sampling regimes in identifying inter-annual changes in ... monthly mean temperature over two years with a significance α of 0.05 and a power P of 0.8. Sampling wind ... monthly mean log-transformed wind speed α of 0.05 and P of 0.9. File: 35-Agnew.pdf ... of the required sample size such that a certain level of change would be detectable at a ... significance level of a and at a power of P. The method of Sokal and Rohlf (1981) was used along the ... . The occurrence of cyclic phenomena at Davis Station, including the suspected occurrence of cycles in ... temperature change of ±2°C in December and January could be reliably detected at Davis Station, but that in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 561–573 : Author(s): Agnew, D.J.
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Research currently being undertaken by the Republic of South Africa on "dependent and related species" within the Antarctic marine ecosystem
!i'.ated on t.E'111Perate Gou~h Island in the South Atlantic Ocean .;.nd on the -::;ub-Antarctic Prince ... :32. Ad,jitional inform.at ion wa5 collected bY members of the in 1873. No further ornithological ... nactur11al I~, are now beins' studied, The results to date ~;how th.at birds ~;i9nificantl!::1 affect ... Probabl!.1 aPProxi- 111at!o'S that of either seals or wholfJS. Si nc:e the f'I' i nee E:,jwal'd ... Paper Title: Research currently being undertaken by the Republic of South Africa on " ... components of the biological sciences programme are described. The primary objective of the studies being ... undertaken is to improve our understanding of the ecology of important predators (especially seals and ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/2 (Selected Scientific Papers, SC-CAMLR-SSP/2) : 59-77 : Author(s): South Africa
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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 : Author(s): Agnew, D.J. and G. Phegan
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On reproduction of Electrona carlsbergi (Tåning)
. 1981. Results of the research cruises ofFRV Waiter Herwig to South America. Family Myctophidae ... Paper Title: On reproduction of Electrona carlsbergi (Tåning) Abstract / Description: This paper ... presents results from histological examinations of gonads of Electrona carlsbergi from the Atlantic sector ... of the Southern Ocean. From materials available it has been ascertained that E. carlsbergi spawns in ... the notal waters. Maturation of females begins when body length reaches 76 to 78 mm. Vitellogenesis is ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 397–409 : Author(s): Mazhirina, G.P.
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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
of temperature, standard sphere and time, is 2.1 dB, i.e., 0.8 dB less than the total range ofTS gain ... Paper Title: Calibration of an acoustic echo-integration system in a deep tank, with system gain ... sphere. It presents the results of an extensive calibration of a Simrad EK500 scientific echosounder with ... gain, including the effects of temperature, standard sphere and time, is 2.9 dB. Gain values calibrated ... with the Cu sphere are, with the exception of the long pulse length, lower than those from the WC ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 127–144 : Author(s): Demer, D.A. and R.P. Hewitt
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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 : Author(s): Hewitt, R