Search results
-
New data on spawning, hatching and growth of the Kerguelen Islands Champsocephalus gunnari shelf stock
programme allows to identify each year, both from the ichthyoplanktonic surveys and bottom trawlings ... , an annual cohort. Strong differences in abundance of larvae are observed yearly. One cohort seems dominant ... in the samples along the study. It would explain the previouly observed three years cycle. Spawners have been ... to identify each year, both from the ichthyoplanktonic surveys and bottom trawlings, an annual cohort. Strong ...
Meeting Document : WG-FSA-94/9 Rev. 1 : Author(s): G. Duhamel (France)
-
Tooth growth in male Antarctic fur seals (Arctocephalus gazella) from South Georgia: an indicator of long-term growth history
in longitudinal sections of teeth. Mean age at death was 7∙69 ± 0∙07 years and this showed a small but significant ... an indication of body growth, Tooth growth rate was lowest in seals which died early (age 4 years) and increased ... mature early also died early. Tooth growth layers deposited in each calendar year were compared ... was deposited. There was significant variation in the depth of tooth growth layers deposited in different years ...
Meeting Document : WG-CEMP-93/11 : Author(s): I.L. Boyd and J.P. Roberts (United Kingdom)
-
Linking population trends of Antarctic shag (Phalacrocorax bransfieldensis) and fish at Nelson Island, South Shetland Islands (Antarctica)
in the number of breeding pairs of Antarctic shag Phalacrocorax bransfieldensis in two colonies on Nelson ... the 1990s up to the mid 2000s over an overall monitoring period of over two decades. It addresses ... influenced by the concomitant decrease in abundance of two of their main prey, the nototheniids Notothenia ... in the number of breeding pairs of Antarctic shag Phalacrocorax bransfieldensis in two colonies ...
Meeting Document : WG-EMM-16/P09 : Author(s): R. Casaux and E. Barrera-Oro
-
Inter-annual variability in krill density at South Georgia: 1997–2012
one year were driving the mean krill density estimates for the WCB in that year. WCB krill density ... (µ, mean density for the area) showed several years of moderate to high values (µ > 30 gm ... -2) interspersed with years (1999-2000, 2004, 2009-2010) of very low density (µ < 30 gm-2). Author ... 7% of the maximum reset densities observed. Hence, only the densest krill swarms detected in any one year were ...
Meeting Document : WG-EMM-13/14 : Author(s): S. Fielding, J.L Watkins, P. Trathan, P. Enderlein, C. Waluda, C. Goss, G. Stowasser, G. Tarling and E. Murphy (United Kingdom)
-
Biodiversity of the benthos off Kerguelen Islands: overview and perspectives
been neglected and understudied during the last 30 years. The Kerguelen Plateau, situated ... and understudied during the last 30 years. The Kerguelen Plateau, situated at the northern limit of the Polar Front ... Abstract: The Kerguelen Plateau possesses a very diverse benthic fauna. Over the years ... at the northern limit of the Polar Front is probably one of the best study areas to (1) monitor the impact ...
Meeting Document : WS-MPA-11/P03 : Author(s): N. Améziane, M. Eléaume, L.G. Hemery, F. Monniot, A. Hemery, M. Hautecoeur and A. Dettaï
-
Reports on biological information of toothfish with special reference to bycatch, depredation and spawning dynamics in Division 58.4.4 a & b by Shinsei maru No. 3 during 2008–14 seasons
method and grenadier bycatch method by Gasco et al. (2014) using two size levels of unit cell ... , and generalized linear model with stepwise process for separating two areas, SSRUs 58.4.4aA & 58.4.4bB ... in the same SSRU. The depredation rate in weight was estimated to be 20-25% in SSRUs 58.4.4aA & 58.4.4bB ... method and grenadier bycatch method by Gasco et al. (2014) using two size levels of unit cell ...
Meeting Document : WG-FSA-15/21 : Author(s): K. Taki and T. Ichii (Japan)
-
Review of biological characteristics of the Antarctic toothfish (Dissostichus mawsoni) and its distribution in Antarctic waters
of D. mawsoni are mentioned only in brief. Most published materials refer to studies conducted in the 1970-1980s ... for the assessment of its biomass and identification of its stocks. The trophodynamics of D. mawsoni are mentioned ...
Meeting Document : WG-FSA-98/37 : Author(s): Secretariat
-
Reports on abundance and biological information on toothfish in Divisions 58.4.4a and 58.4.4b by Shinsei Maru No. 3 in 2011/12 season
during the survey in two SSRUs (B & C) of Ob Lena Bank. Total catch (excluding tagged and released ... of 133 killer whales (Orcinus orca) were observed at the 30 hauls. All of whales observed ... the survey in two SSRUs (B & C) of Ob Lena Bank. Total catch (excluding tagged and released fish ... whales (Orcinus orca) were observed at the 30 hauls. All of whales observed and the predatory damaged ...
Meeting Document : WG-SAM-12/16 : Author(s): K. Taki, T. Iwami, M. Kiyota and T. Ichii (Japan)
-
Preliminary results of RV Dmitriy Stefanov researches in the Antarctic area of the Atlantic Ocean in April 1992
the polygon of 30 x 30 miles in the fishing area northwestward of Coronation Island in 18-22 April,1992 ... obtained. The balance of krill transport from and into the polygon was calculated. The first two dublicates ... revealed the krill accumulation in the contour, and the second two showed the loss. The accumulation was 52 ... The oceanological, hydroacoustic and trawling surveys were carried out within the polygon of 30 ...
Meeting Document : WG-CEMP-92/33 : Author(s): L.G. Maklygin, V.N. Shnar, A.V. Remeslo, A.P. Malyshko, I.A. Trunov, I.A. Barabanov, V.P. Shopov (Russian Federation) and A.G. Shepelev (Ukraine)
-
Investigating emigration in stock assessment models of Antarctic toothfish (Dissostichus mawsoni) in Subarea 88.2 SSRUs 88.2C–H
of tagged fish with few being recaptured after more than 3 years at liberty, a steepening of the decay rate ... that includes both tagged and untagged fish), but requires a significant amount of immigration each year ... to explain the remaining data. Models that include more than one area may be required to model both ... have developed models for (i) SSRU 88.2H using tag recaptures from 1 year at liberty; (ii) SSRU 88.2H ...
Meeting Document : WG-FSA-14/56 : Author(s): S. Mormede, A. Dunn and S.M. Hanchet (New Zealand)