Search results
-
Joint SC-CAMLR and SC-IWC Workshop, its format and draft Terms of Reference
Abstract: A proposal for a Joint SC-CCAMLR IWC Workshop to develop multi-species models of the ... formed. WG-EMM 2015 agreed on the benefit of dividing the workshop into two; the first to review data ... availability, and the second as a comprehensive discussion of approaches in relation to modelling and ... monitoring. The steering group was tasked to develop a draft terms of reference for the workshops to be ...
Meeting Document : SC-CAMLR-XXXIV/BG/33 : Author(s): Co-conveners of the Joint SC-CAMLR and SC-IWC Workshop
-
Depth and temperature preferences of Antarctica toothfish (Dissostichus mawsoni) from a pilot popup satellite archival tag study in the Mawson Sea
depth range of 326 to 1824 m and a temperature range of-1.95 to 0.7°C. Through available depth and ... appeared to have remained in the Mawson Sea area for the majority of time at liberty. The recaptured ... warranted to observe similar ascents in other individuals, and be analyzed in the greater context of ... reproductive ecology of Antarctic toothfish. To this end, a tagging configuration is proposed to target logging ...
Meeting Document : WG-FSA-18/22 : Author(s): C.H. Lam, S.-G. Choi, E. Kim, S. Chung, J. Lee and D.H. An
-
Net-based verification of acoustic techniques used to identify Antarctic krill
. Using the SDWBA model, dB difference identification ranges based on the length-frequencies of krill in ... of 2-16 dB and (iv) '2 freq 2-12'-with an Sv120-38 range of 2-12 dB The '3 freq model ... identified only 6 of the 16 krill aggregations sampled the nets. contrast the '2 freq model' and ... orientation distributions applied the performance of the '3 freq model' was comparable with the two ...
Meeting Document : SG-ASAM-09/04 : Author(s): J. Watkins and S. Fielding (United Kingdom)
-
The relative impacts of Autolines and Spanish longlines on vulnerable marine ecosystems
of protecting VMEs, but work comparing the effects of different gear types has been relatively ... limited. We used data collected by the longline fishery in Subarea 88.1 to compare the impacts of ... Autolines and Spanish longlines on VME taxa. We found that the probabilities of observing positive ... bycatches and the amounts of positive bycatch decreased with depth, but we also found that the rate at which ...
Meeting Document : WG-FSA-12/27 : Author(s): T. Gerrodette and G. Watters (USA)
-
Acoustic monitoring and evaluation of krill in the Antarctic ecosystem Bransfield Strait and around Elephant Island during ANTAR XXI and XXII, aboard RV Humboldt, Peru
Abstract: Monitoring and hydroacoustic assessment of the distribution and biomass of krill ... multifrequency 120 and 38 kHz, respectively. This system is calibrated according to the procedure of ICES. For ... from the surface to 20 m deep. A wide distribution of krill in the study area, the highest densities ... ²). The estimations of hydroacoustic biomass krill by the method of Distorted Stochastic Approximation ...
Meeting Document : WG-EMM-16/76 : Author(s): R. Cornejo, M. Flores and J. Zuzunaga
-
Revised continuation proposal of multi-Member research on Patagonian toothfish (Dissostichus eleginoides) exploratory fishery in 2018/19 in Division 58.4.3a by France and Japan
Abstract: France and Japan revised a research plan to continue investigating the populations of ... achieve a robust stock assessment. We present here a proposal for the continuation of the research plan as ... of revised points from WG-SAM-18/08 is as follows: Updates the timeline table of milestones Track ... changes of milestones Summary of previous recommendations by WGs and SC (Annex 1). Author(s): Delegations ...
Meeting Document : WG-FSA-18/61 : Author(s): Delegations of France and Japan
-
Progress on the application of an age-structured production model fitted to commercial catch-rate and catch-at-length data to assess the toothfish (Dissostichus eleginoides) resource in the Prince Edward Island vicinity
allow the estimation of a selectivity-at-age function that decreases at larger ages. This is, in ... particular, to accommodate the view of the August 2003 meeting of the Subgroup on assessment methods that 0.2 ... yr-1 is likely the largest value of natural mortality M that is plausible for toothfish. Catch, catch ... . In the meantime, based upon a cautious interpretation of projections over the wide range of current ...
Meeting Document : WG-FSA-03/97 : Author(s): A. Brandão and D.S. Butterworth (South Africa)
-
Fecundity and size at sexual maturity of the bigeye grenadier (Macrourus holotrachys) at South Georgia (CCAMLR Subarea 48.3)
at different stages of development suggesting that M. holtrachys may have an extended spawning season ... . Analyses of size at sexual maturity indicate that Lmat 50 occurs at 29cm (pre-anal length) whilst Lint 50 ... final ovarian development is a prolonged process in M. holotrachys which probably lasts for a period of ... greater than a year. Sex ratios of specimens caught in the longline fishery are highly skewed with females ...
Meeting Document : WG-FSA-02/26 : Author(s): T. Mulvey, S.A. Morley, M. Belchier and J. Dickson (United Kingdom)
-
CIRCULATION IN THE ROSS SEA SECTOR OF THE SOUTHERN OCEAN: REPRESENTATION IN NUMERICAL MODELS
Abstract: The circulation in the Ross Sea sector of the Southern Ocean is examined in three ... numberical models of intermediate to high resolution. Despite the model differences (including physics ... , forcing) the circulation representation is relatively consistent, both in terms of the mean and some ... aspects of monthly variability. This could point to strong bathymetric constraints on the circulation. In ...
Meeting Document : WG-EMM-09/41 : Author(s): G.J. Rickard (New Zealand), M. Roberts (United Kingdom), M.J.M. Williams, A. Dunn, M.H. Smith and M. Pinkerton (New Zealand)
-
On the taxonomy of the Lepidonotothen squamifrons group (Pisces, Perciformes, Notothenioidei)
Abstract: The Lepidonotothen squamifrons group has been described to be comprised of 3 species: L ... overlapping. Enzyme electrophoresis of enzyme polymorph isms has been applied to specimens morphologically ... ; represent only populations of one species. Evidence is presented that the third species of the group, L ... comprised of only one species, Lepidonotothen squamifrons (Günther, 1880). We found no statistically ...
Meeting Document : WG-FSA-93/25 : Author(s): R. Schneppenheim and K.-H. Kock (Germany), G. Duhamel (France) and G. Janssen (Germany)