Résultats de la recherche

1. Otolith and body size relationships in bigeye grenadier (Macrourus holotrachys) in CCAMLR Subarea 48.3

   less accurate estimates of fish length. Seasonal variations in fish mass with reproductive condition ... need to be considered if predictions of fish mass from otolith mass are undertaken. Otolith size/fish ... size models should be derived for each fish population under investigation. The length of fish chosen ... in such studies should be representative of the size range consumed by predators. File:  09morley ... variations in fi sh mass with reproductive condition need to be considered if predictions of fi sh mass from ... ; Goldsworthy et al., 2001), and discarded by- catch fi sh are known to be taken by black-browed and grey ... August 2001. Specimens were frozen and then thawed prior to examination at the British Antarctic ... study indicate that otolith size (i.e. length or width) or mass, can be used to predict the size of ...

   Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 133–143 : Auteur(s): Morley, S. and M. Belchier

2. Assessing the power to detect systematic change in Adélie penguin foraging trip duration

   . While foraging trip duration is considered to be sensitive to changes in food availability over time ... years of post-impact monitoring to detect systematic change with high power unless one were willing to ... has a distribution under the null hypothesis that is well approximated by a t-distribution with a–1 ... value for a t-distribution with a–1 degrees of free- dom that is exceeded with a probability α if ... and ' ijkme are presumed to be random values from normal distri- butions with mean 0 and ... expected to be correlated. It is noted that the model was augmented when initially applied to the ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 201–215 : Auteur(s): Southwell, C., J. Clarke and L.M. Emmerson

3. Exploratory fishing for Dissostichus spp. in the Antarctic region (Subareas 48.1, 48.2 and 88.3)

   'S). Yields of Dissostichus spp. were very low in the three subareas, with values of only 5.7 g ... system) were used for the operation, with variable quantities of fish hooks (1 440 to 4 320), No. 9 ... (Latitude 68°49'S), and from the Bellingshausen Sea (70°38'S) to Clarence and Elephant Islands (61 ... °14'S), while Patagonian toothfish (Dissostichus eleginoides) were caught in waters from King ... navigation. In accordance with the cruise schedule, Subareas 88.3, 48.1 and 48.2 were researched in that ... important to point out that in all the areas studied, bottom topography was found to be quite flat, both ... a mixed carnivorous diet (euryphagia), with small identifiable prey comprising 59% fish, 27 ... . that the results obtained would be in any way related to these atmospheric-oceanic conditions. This ...

   Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 1–17 : Auteur(s): Arana, P.M. and R. Vega

4. Book review: Fish and Fish Resources of the Antarctic

   research expeditions in Antarctica. The introduction notes that until the 1960s Antarctic waters were still ... CCAMLR Scieiicc, Vol. 8 (2001): 165-168 BOOK REVIEW ... having participated in many fisheries research expeditions in Antarctica. The introduction notes that ... processes governing bioproductivity in various Antarctic ecosystems and the real opportunities that exist ... for the future harvesting of fish stocks based on the fisheries potential of areas with high ...

   Science Journal Paper : CCAMLR Science, Volume 8 (CCAMLR Science, Volume 8) : 165–168 : Auteur(s): Shust, K.V

5. Refinements to the strategy for managing depleted fish stocks based on CCAMLR objectives

   that applying a policy of F 0.1 will not always lead to stock recovery in two to three decades, and ... hence that additional management policies are required for depleted stocks. The implications of these ... studies for defining the terms 'depleted' and 'target levels for recovery' are briefly ... -DAC) suggested that the interpretation of Article IT of the CCAMLR Convention would be assisted by ... associated activities in the area to which this Convention applies shall be conducted in accordance with the ... . For this purpose its size should not be allowed to fall below a level close to that which ensures ... exploitation should be compatible with potential reversibility in two or three decades, taking into account ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 467–475 : Auteur(s): de la Mare, W.K. and A. Constable

6. A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea Region incorporating multi-year mark-recapture data

   hence a multi-year mark-recapture tagging program was initiated by New Zealand fishing vessels in 2001 ... model was developed for Antarctic toothfish in the Ross Sea region that incorporates multi-year release ... of tagged fish and subsequent multi-year data of recapture of tagged fish in conjunction with fishery ... showed the data selection provided a precautionary estimate of biomass, and that these estimates were ... -per-unit- effort (CPUE) indices may be unreliable as indices of abundance (Harley et al., 2001 ... composition of tagged fish that approximates that of the catch. However, the problem with longer-term mark ... quality of these data is paramount. Data from the RSR of fish recaptured with a tag suggested that tag ... released with tags by all vessels between 2001 and 2013, and 1 471 tagged fish were recap- tured by 2013 ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 39–62 : Auteur(s): Mormede, S., A. Dunn and S.M. Hanchet

7. Distribution and size–age composition of Antarctic krill (Euphausia superba) in the South Orkney Islands region (CCAMLR Subarea 48.2).

   distribution of size–age groups in association with particular water masses indicated that age 2+ krill ... cohort was found in catches in 2009 or in 2010. This absence of 1+ E. superba is unlikely to be a result ... association with particular water masses indicated that age 2+ krill dominated in cold Weddell Sea waters in ... (2+, 3+) cohorts of krill were found. Furthermore, there were mixed swarms with inter- mediate mean ... fishing area, while mixed swarms with intermediate average length (46–50 mm) were found in a mosaic ... the management of krill fisher- ies. This includes locating areas with high and low krill spawning ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 123–134 : Auteur(s): Sologub, D.O. and A.V. Remeslo

8. An assessment of the impact of krill fishery on penguins in the South Shetlands

   ) fishery and penguins during the penguins' breeding season (December to March) in the South Shetland ... is estimated to be high to the north of King George, Nelson and Robert Islands (9 746 tonnes/10-day ... implies a low level of competition between the fishery and penguins. Krill biomass was estimated to be as ... . Compared with the level of biomass (≥200 x 10 3 tonnes) and its variability (the order of 100  x 10 3 ... , Nelson and Robert Islands. It should also be noted that Low, Clarence and Deception Islands supported ... period. It should be noted that large krill concentrations, having a biomass of 200-1 500 X 103 tonnes ... al., 1987; Agnew, 1992). Consumption rates of krill were assumed to be 1 090 g /adul t /day for ... Livingston or Elephant Island. In contrast, food consumption by penguins is estimated to be high to the ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 107–128 : Auteur(s): Ichii, T., M. Naganobu and T. Ogishima

9. Estimation of natural mortality for the Patagonian toothfish at Heard and McDonald Islands using catch-at-age and aged mark-recapture data from the main trawl ground

   :  Attempts to estimate natural mortality, as a single constant M, simultaneously with other model parameters ... fishery, the CCODE model gave a well-behaved profile for the log-likelihood with the corresponding ... )) but with the modification that fish below age 4 could be esti- mated to have non-zero selectivity ... most of the catch is predicted to be taken in 2001, indicate that predic- tions from the BODE model ... ), the population in Ground B is assumed to be ‘closed’ in that there has been no immigration nor ... , along with the size of the random sam- ple of fish measured for length and the sub-sample of these that ...

   Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 29–45 : Auteur(s): Candy, S.G., D.C. Welsford, T. Lamb, J.J. Verdouw and J.J. Hutchins

10. A post-processing method to remove interference noise from acoustic data collected from Antarctic krill fishing vessels

    Antarctic krill (Euphausia superba), yet the quality and even the utility of the data may be seriously ... Chinese krill fishing vessel. Results show that the interference noise was effectively reduced while ... either be determined as the level that visually seems to give good discrimination of ‘target’ from ... , it will be set as vacant based on the assumption that most of its neighbouring samples are vacant ... ). The concept that krill fishing vessels could contribute acoustic data was evaluated with exam- ple ... might still be significant. Compared with the above techniques, the post-processing technique ...

    Science Journal Paper : CCAMLR Science, Volume 23 (CCAMLR Science, Volume 23) : 17–30 : Auteur(s): Wang, X., J. Zhang and X. Zhao

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