Search results
-
Seabird by-catch by autoline vessels: do line setters increase the sink rate of integrated weight longlines?
in the first few metres of the water column where seabird interactions are likely to be most intense. Longlines ... astern. This increase in depth is minor and unlikely to result in substantial reductions in interactions ... of the water column where seabird interactions are likely to be most intense. Longlines deployed with the line ... in depth is minor and unlikely to result in substantial reductions in interactions between longlines ... the period from September 2001 to August 2003 when nearly 27 000 seabirds were killed (Delord et al., 2005 ... , depth and the treatment x depth interaction were treated as fixed effects and pair number, magazine ... setter were identical, including in the first few metres of the water column where seabird interactions ... in substantial reductions in interactions between longlines and seabirds in the Kerguelen and Crozet fisheries ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 107–114 : Author(s): Robertson, G., J. Williamson, M. McNeill, S.G. Candy and N. Smith
-
Seabird mortality in the Patagonian toothfish longline fishery around Crozet and Kerguelen Islands, 2001–2003
respectively) killed 26 668 seabirds between September 2001 and August 2003. Overall, the white-chinned petrel ... and Kerguelen Islands, 2001–2003 Abstract / Description: The legal Patagonian toothfish (Dissostichus ... Islands (Subarea 58.6 and Division 58.5.1 respectively) killed 26 668 seabirds between September 2001 ... and August 2003. Overall, the white-chinned petrel (Procellaria aequinoctialis) was the most frequently ... 2001 and August 2003. Overall, the white-chinned petrel (Procellaria aequinoctialis) was the most ... 426 726 hooks) deployed from 1 September 2001 to 31 August 2003. A total of 26 668 seabirds were ... seasons, as suggested by the signifi cant interaction between season and moon brightness. In 2001/02 ... of 26 668 seabirds were counted as having been killed from September 2001 to August 2003 and overall ...
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
-
Length-at-age in juvenile Patagonian toothfish (Dissostichus eleginoides)
a Hillquest thin sectioning machine was considered to provide the best and most consistent pattern ... a Hillquest thin section grinding machine to reveal a transverse plane through the otolith nu- cleus ... , it has been demonstrated (Ashford et al., 2001) that, over the lifespan of the fi sh, age estimates ... otolith sections have been tested at the Center for Quantitative Fisheries Ecology, including ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 1–10 : Author(s): Ashford, J., C. Jones, S. Bobko and I. Everson
-
Age, growth and mortality of Patagonian toothfish (Dissostichus eleginoides) caught off Kerguelen
off Kerguelen in 1999 were estimated by reading transverse-sectioned otoliths. Randomly interspersed ... by reading transverse-sectioned otoliths. Randomly interspersed otoliths from reference collections were used ... of a HillQuist Thin Section machine, each otolith was ground from the anterior end to give a transverse plane ... crenellations (Everson, 1980; Ashford, 2001). The revealed section was fi ne-ground and polished using ... a Crystalmaster 8 Machine with 30M and 3M Mark V Laboratory lapping fi lm. Finally, pol- ished sections were ... : the mean age of the readings for each section was used as its reference age (Ashford, 2001). Reference ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 29–41 : Author(s): Ashford, J., G. Duhamel, C. Jones and S. Bobko
-
A comparison between otoliths and scales for use in estimating the age of Dissostichus eleginoides from South Georgia
; for otoliths, we used transverse sections prepared by baking and grinding the posterior and anterior sides ... impressions on acetate slides; for otoliths, we used transverse sections prepared by baking and grinding ... ~ o ' i t i o n e d m a ~ u a ~ ~ ~ '0 contact the grinding consisting of seven large followed by a of a Hillquist thin section machine ... , the slide was mounted on the sectioning arm of the Hillquist thin section machine, and the otolith half ... CCAMLR Scicrzce, Vol. 8 (2001): 75-92 A COMPARISON ... ; for otoliths, we used transverse sections prepared by baking and grinding the posterior and anterior sides ...
Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 75–92 : Author(s): Ashford, J.R., S. Wischniowski, C. Jones, S. Bobko and I. Everson
-
A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures
interact in typical energy allo- cation models (see Constable, 2001 for description). Therefore ... of an ecosystem-based management pro- cedure for krill (CCAMLR, 2001). This has entailed the Scientifi ... . This will ensure that each element can effectively interact with other elements. Figure 4 illustrates ... ’ of the element may be important, particularly if there are age/stage-specifi c interactions with other ele ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Author(s): Constable, A.J
-
Determination of Antarctic krill acoustic back-scattering cross-section
Paper Title: Determination of Antarctic krill acoustic back-scattering cross-section Abstract ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... to determine the acoustic cross-section of the back-scattering of krill. By experiments, the authors have ... obtained the dependence of the acoustic section of back-scattering of krill on its length at a frequency ... KRILL ACOUSTIC BACK-SCATTERING CROSS-SECTION V.A. Protaschuk and T.A. Lukashova (U.S.S.R.) Abstract ... -section of back-scattering of krill. The target strength can be determined in situ by measuring the echo ... to determine the acoustic cross-section of the back-scattering of krill. By experiments, the author~ have ... obtained the dependence of the acoustic section of back-scattering of krill on its length at a frequency ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 141-152 : Author(s): Protaschuk, V.A. and T.A. Lukashova
-
Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
in August. Killer whale interactions appear to be more consistent with no obvious pattern between months ... towards the end of the season in August. Killer whale interactions appear to be more consistent ... encounters and pod sizes have remained relatively constant. Most interactions from sperm whales occur during ... interactions from sperm whales occur during May at the start of the season with the sightings becoming fewer ... and July, and 21% in August. Figure 2 shows the distribution of interactions for both species by month ... have remained relatively constant. Most interactions from sperm whales occur during May at the start ... of the season with the sightings becoming fewer towards the end of the season in August. Killer whale ... interactions appear to be more consistent with no obvious pattern between months. Both species demonstrate ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Author(s): Moir Clark, J. and D.J. Agnew
-
Interactions of Patagonian toothfish fisheries with killer and sperm whales in the Crozet Islands Exclusive Economic Zone: an assessment of depredation levels and insights on possible mitigation strategies
Paper Title: Interactions of Patagonian toothfish fisheries with killer and sperm whales ... pods were involved in 81.3% of the interactions. Significant variations of interaction rates ... Interactions of Patagonian toothfish fisheries with killer and sperm whales in the Crozet Islands ... % of the interactions. Significant variations of interaction rates with killer whales were detected between vessels ... InteractIons of PatagonIan toothfIsh fIsherIes wIth kIller and sPerm whales In the crozet Islands exclusIve ... pods were involved in 81.3% of the interactions. Significant variations of interaction rates ... -identification ont révélé que 81,3% des interactions concernaient 35 orques appartenant à quatre troupeaux ... différents. De fortes variations des taux d'interaction avec les orques ont été détectées entre les navires ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 179–195 : Author(s): Tixier, P., N. Gasco, G. Duhamel, M. Viviant, M. Authier and C. Guinet
-
Validation of sink rates of longlines measured using two different methods
of string of known length is attached. Fenaughty and Smith (2001) described the method of deploying ... ). Each longline deployed by the vessel consisted of six magazines, each 1.8 km long. Mk9 TDRs ... were used. Bottles and TDRs were deployed on the third and fourth magazine to avoid measuring effects ... , bottles and TDRs were deployed on the same lines but on separate magazines, because an entangled bottle ...
Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 179–187 : Author(s): Wienecke, B. and G. Robertson