Résultats de la recherche

1. A possible framework in which to consider plausible models of the Antarctic marine ecosystem for evaluating krill management procedures

   Paper Title:  A possible framework in which to consider plausible models of the Antarctic marine ... management procedure for the krill fishery, including the evaluation of candidate management procedures in a ... simulation framework, using plausible models of the Antarctic marine ecosystem. This paper develops a ... framework for allowing flexibility in dealing with biological, spatial and temporal scales. The body of the ... procedure for the krill fi shery. The main task at present is to develop plausible models of the Antarctic ... to monitor and assess different components of the ecosystem at relevant scales. This paper ... lit y, s uc h as u nf av ou ra bl e at m os ph er ic c on d it io ns . H of m an ... complex foraging models at the scale of individuals (e.g. Alonzo et al., 2003a, 2003b). While the former ...

   Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 99–117 : Auteur(s): Constable, A.J

2. Spatial distribution of management measures, Antarctic krill catch and Southern Ocean bioregions: implications for conservation planning

   season, 64% of the CAMLR Convention Area was open to fishing for at least one species. There were ... Paper Title:  Spatial distribution of management measures, Antarctic krill catch and Southern ... conservation planning for developing marine spatial protection includes analysis of the spatial distribution of ... . The analysis required standardised information on the location and extent of spatial fisheries ... representative examples of marine ecosystems, biodiversity and habitats at an appropriate scale to maintain ... Management at its meeting in 2012, the GIS database is available for the use of all CCAMLR Members (SC ... area was open to directed fishing (i.e. had a catch limit of >0 for at least one species). Most ... season, 64% of the CCAMLR area was open to directed fishing for at least one species. Although in ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 1–19 : Auteur(s): Grant, S.M., S.L. Hill and P.T. Fretwell

3. Histological study on the ovarian development of mackerel icefish (Champsocephalus gunnari) from the South Georgia Islands

   Paper Title:  Histological study on the ovarian development of mackerel icefish (Champsocephalus ... South Georgia and Shag Rocks areas in February and March 1994. Six phases of oocyte development were ... described macroscopically for various species of Channichthyidae. Stage six includes ovaries undergoing ... generalised regression was found, which was observed in 41% of mature fish. A high proportion of juvenile ... . For example, Everson et al. (1991) indicated that the reproductive success of this species at South ... cycle and to estimations of parameters used in fisheries biology, such as length at first maturity ... Phase Stage I1 (earlv primary vitellogenesis): at the start of vitellogenesis the oocytes increase in ... ). Proceedings of thp V Congress of the European Ichthyological Society, 2985. Stockholm, Sweden: 357-372 ...

   Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 35–49 : Auteur(s): Macchi, G.J. and E.R. Barrera-Oro

4. Towards the development of a management plan for mackerel icefish (Champsocephalus gunnari) in Subarea 48.3

   gunnari) at South Georgia is complicated by the likelihood of substantial periodic variations in natural ... Paper Title:  Towards the development of a management plan for mackerel icefish (Champsocephalus ... gunnari) in Subarea 48.3 Abstract / Description:  Management of the mackerel icefish (Champsocephalus ... mortality rates. These may be associated with increased consumption of C. gunnari by Antarctic fur seals in ... Tampa, Fl. 33609-3437, USA Abstract Management of the mackerel icefish (Champsocephnlus gunnari) at ... of food web dynamics within the South Georgia ecosystem than we possess at present. There is ... (Ckampsoceplzalus gunnari) at South Georgia poses several unique problems, largely d u e to the position of this ... in March 1990 (Kock, 1992). The most recent stock assessment was performed at the 1993 meeting of ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 63–77 : Auteur(s): Agnew, D.J., I. Everson, G.P. Kirkwood and G.B. Parkes

5. Operational interactions of sperm whales and killer whales with the Patagonian toothfish industrial fishery off southern Chile

   Paper Title:  Operational interactions of sperm whales and killer whales with the Patagonian ... toothfish industrial fishery off southern Chile Abstract / Description:  Interactions of sperm whales ... industrial fishing vessels between April 2002 and March 2003. For the 180 hauls monitored, the evidence of ... = 3). The mean rate of depredation was 3% (±2% CI 95%; n = 180 sets) and ranged between 0 and 100 ... the slope waters lying between 47ºS and 58ºS at the southwestern tip of South America (Figure 1 ... ° –65° Scale: 1:16184071 at Latitude 0° 131 Interactions of sperm and killer whales with the ... heads and 3 trunks were recovered which suggests the loss of at least 140 toothfi sh in the portions ... useful for detecting whales at night and for examining the relationships between the type and rate of ...

   Science Journal Paper : CCAMLR Science, Volume 11 (CCAMLR Science, Volume 11) : 127–140 : Auteur(s): Hucke-Gaete, R., C.A. Moreno and J. Arata

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

   catch-at-age data. This is the first published stock assessment of toothfish in the Ross Sea region. It ... Paper Title:  A stock assessment model of Antarctic toothfish (Dissostichus mawsoni) in the Ross ... since the late 1990s. No fishery-independent methods of monitoring stock abundance were plausible, and ... . Although tagging experiments are commonly used for assessing fish stocks, most rely on estimates of ... subsequent multi-year data of recapture of tagged fish in conjunction with fishery catch-at-age data. This ... more reliable method for estimating abundance and yields for the stock. The use of catch-at-age ... reconstruct the history of a fish population, and statistical catch-at- age analyses require auxiliary ... are commonly used to provide abundance information in catch-at-age analyses. In the absence of ...

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

7. An assessment of toothfish in Subarea 48.3 using CASAL

   Paper Title:  An assessment of toothfish in Subarea 48.3 using CASAL Abstract / Description:  This ... paper presents an assessment of the stock of toothfish around South Georgia (Subarea 48.3) using the ... CASAL stock assessment software (Bull et al., 2005). Detailed attention is given to the incorporation of ... as much of the available tuning data as possible, as well as a whole range of assessment ... 1992 onwards, and for many of these years the fleets had reported data at different resolutions (for ... by Marlow et al. (2003). This provided a dataset of releases at length by year and evaluación ... (n = 329, maxi- mum time at liberty = 5.5 years). The probability of both tags being lost was ... was assumed to be constant over all ages and years, at an assumed value of M = 0.165, which is ...

   Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 65–95 : Auteur(s): Hillary, R.M., G.P. Kirkwood and D.J. Agnew

8. Biological characteristics of Antarctic fish stocks in the southern Scotia Arc region

   not suggest geographical differences in length-to-weight growth. Differences in estimates of length at ... sexual maturity and length at first spawning indicate that in some species final maturation of the gonads ... southerly grounds than at South Georgia. The distribution of gonadosomatic indices in March suggested that ... coriiceps have egg diameters of 4.3-5.2 mm at spawning. The Trematomus species investigated have egg ... growth. Differences in estimates of length at sexual maturity and length at first spawning indicate ... ~psoceplzaltis gtinnari was one year later on the southerly grounds than at South Georgia. The distribution of ... C. gt~nnari), Notothenia rossii and Nototlzenia coriiceps have egg diameters of 4.3-5.2 mm at ... analysed in toto and sorted and identified to species level. A subsample of at least 500 kg was taken ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 1–41 : Auteur(s): Kock, K.-H., C.D. Jones and S. Wilhelms

9. Distribution, morphology and ecology of Macrourus whitsoni and M. caml (Gadiformes, Macrouridae) in the Ross Sea region

   Paper Title:  Distribution, morphology and ecology of Macrourus whitsoni and M. caml (Gadiformes ... identification of a new species of Southern Ocean grenadier, Macrourus caml, which had hitherto been identified ... as M. whitsoni. The first comparison of the distribution and ecology of the two species of Macrourus ... in the Ross Sea region is presented. The number of rays in the left pelvic fin and number of rows of ... capture was taken to be the mean of the depth recorded on the fishing vessel at the start and end of ... setting. Depths at the start and end of setting differ (maximum difference of 606 m, median difference ... , 2011) using functions developed at the National Institute of Water and Atmospheric Research (NIWA ... ). Due to the lack of young fish, the t0 parameter was fixed at t0 of –0.159 (males) and 0.159 (females ...

   Science Journal Paper : CCAMLR Science, Volume 20 (CCAMLR Science, Volume 20) : 37–61 : Auteur(s): Pinkerton, M.H., P. McMillan, J. Forman, P. Marriott, P. Horn, S. Bury and J. Brown

10. Can toothfish catches be used to predict the presence of vulnerable benthic invertebrate taxa?

    rates and benthic invertebrate catch rates at the scale of a longline segment, ~1 200 m. Analysis of the ... predicting Antarctic toothfish (Dissostichus mawsoni) catch at the scale of a longline segment. This supports ... catch at the scale of a longline set, ~7 km. Further studies at intermediate scales (10–100 km) would be ... Paper Title:  Can toothfish catches be used to predict the presence of vulnerable benthic ... to correlate toothfish catch rates and benthic invertebrate catch rates at the scale of a longline ... aggregate VME indicator taxa weight and toothfish catch at the scale of a longline set, ~7 km. Further ... , currently exists at small spatial scales. The objective of this study is to use data col- lected by ... be conducted at the scale of longline segments. Weight of toothfish or numbers of other fish ...

    Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 87–96 : Auteur(s): Parker, S.J. and M.H. Smith

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