Résultats de la recherche

1. VARIABILITY IN KRILL BIOMASS LINKS HARVESTING AND CLIMATE WARMING TO PENGUIN POPULATION CHANGES IN ANTARCTICA

   populations, many of which were nearly extirpated by humans. This region is also among the fastest-warming ... . One hypothesis guiding ecological interpretations of changes in top predator populations in this ... declines in “ice-loving” species by decreasing their winter habitat, while populations of “ice-avoiding ... ” species have increased. However, 30 y of field studies and recent surveys of penguins throughout the WAP ...

   Meeting Document : WG-EMM-11/P1 : Auteur(s): W.Z. Trivelpiece, J.T. Hinke, A.K. Miller, C.S. Reiss, S.G. Trivelpiece and G.M. Watters

2. The US commercial krill fishery in Area 48: development, fishing patterns, and decision making

   decision making processes involved in harvesting krill by the U.S. fishery. Because the Captain of the Top ... north of South Georgia; in 2001, all fishing was conducted off the South Shetland Islands and Bransfield ... Strait. In 2002, fishing operations were carried out off the Antarctic Peninsula, west of Elephant Island ... ; and northwest of the South Orkney Islands. Information on set locations, effort, yield, catch rates ...

   Meeting Document : WG-EMM-02/18 : Auteur(s): C.D. Jones and M. Hull (USA)

3. FIELD IDENTIFICATION GUIDE TO HEARD ISLAND AND MCDONALD ISLAND (HIMI) BENTHIC INVERTEBRATES

   Abstract:  At CCAMLR-XXVI the Working Group on Fish Stock Assessment (WG-FSA) noted a lack of ... specific reference material for the identification of benthic invertebrates in areas specific to which ... observers carry out their activities (SC-CAMLR-XXVI: Annex 5, paragraph 6.32). To improve the standard of ... observer identifications and also to assist in the identification of vulnerable areas, the Scientific ...

   Meeting Document : WG-FSA-08/59 : Auteur(s): T. Hibberd and K. Moore (Australia)

4. Report on the CCAMLR Marine Debris monitoring program

   common type of debris items found in beach surveys. The fishing items found were mostly from longline and ... bands found at Bird Island. The amount of debris in albatross colonies at Bird Island varies; debris ... . The amount of fishing related items (fishing lines and hooks) found in wandering albatross colonies ... remains the most frequent debris item found in each season. The number of marine mammal entanglements has ...

   Meeting Document : WG-FSA-15/15 : Auteur(s): CCAMLR Secretariat

5. Large-scale oceanographic fluctuations drive Antarctic petrel survival and reproduction

   predators forage over large areas, these indirect e ects may be associated with large-scale patterns of ... predict variation in the demographic parameters of Antarctic seabirds. First, we used a long-term dataset ... on adult survival (estimated from capture–mark–recapture data) and reproduction of Antarctic petrel ... exhaustive literature review to determine whether the e ects of large-scale environmental variability on ...

   Meeting Document : WG-EMM-16/P14 : Auteur(s): S. Descamps, A. Tarroux, S.-H. Lorentsen, O.P. Love, Ø. Varpe and N.G. Yoccoz

6. Information Note for WG-SAM-17, WS-SISO-17 and WG-EMM-17

   Dates The following information is provided by the Secretariat for the use of participants at the ... Martín, Ministry of Foreign Affairs and Worship Arenales 761 (Main Gate) Buenos Aires Arriving at Buenos ... services are a good way to get downtown. The transport booth area is beyond customs and has a couple of ... need to find other means of transportation. Aeroparque Jorge Newbery Airport (AEP): Close to downtown ...

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7. Spatially explicit population dynamics models for Antarctic toothfish in the Ross Sea region

   dynamics of spatial heterogeneity of the population along with age structure, movement and reproductive ... region and used as operating models to evaluate the performance of single-area assessments. The models ... shapes of the preference functions were established through iterative model testing whilst the parameters ... defining the preference functions were estimated within each model. The spatial structure of the models ... ; Pollock et al., 1991; Welsford and Ziegler, 2013). The aims of this paper were two-fold. The first was ... , the spatial structure and movement of fish has shown the potential to have a strong influ- ence on ... , risking overexploitation of those stocks (e.g. Ying et al., 2011). Spatially explicit stock assessments ... modelling of move- ment of fish populations between areas has general- ly been either where migration ...

   Science Journal Paper : CCAMLR Science, Volume 21 (CCAMLR Science, Volume 21) : 19–37 : Auteur(s): Mormede, S., A. Dunn, S. Hanchet and S. Parker

8. An integrated stock assessment for the Patagonian toothfish (Dissostichus eleginoides) in Division 58.5.2 using CASAL

   using CASAL and demonstrates that all of the data available for assessments, including surveys, fishery ... is consistent with the problems discussed of the potential bias of a single-area model in trying to ... included in the assessment of D. eleginoides in Division 58.5.2 until the spatial structure of the mark ... -recapture program can be incorporated appropriately in the assessment. The assessment of long-term annual ...

   Meeting Document : WG-FSA-06/64 : Auteur(s): A. Constable, S. Candy, T. Lamb and I. Ball (Australia)

9. Near-shore acoustic surveys for Antarctic krill at South Georgia, January 2004

   Islands and off the Barff Peninsula, South Georgia, from a 59 foot yacht in January 2004. The purpose of ... were collected in seastate 6 with winds up to 30 knots and swells of approximately 2.5 m at survey ... speeds of up to 7 knots. Echo intensity data were scaled to krill density using a target strength ... determined from the length distribution of krill sampled from fur seal scats at Bird Island (mean krill ...

   Meeting Document : WG-EMM-04/35 : Auteur(s): A.S. Brierley, P.N. Trathan, J. Poncet and A. Morton (United Kingdom)

10. Uncertainty in echosounder calibrations

    Abstract:  Calibration of echo sounders for fish stock assessment are commonly performed using the ... standard sphere method (Johannesson and Mitson, 1983; Simmonds et al., 1984). To determine the accuracy of ... the method, direct measurements of target strength (TS) were made of three standard spheres (Copper ... (Cu)- 23.0 mm and tungsten carbide (WC)- 33.0 mm and 38.1 mm). At the best case range of 5 m, the TS ...

    Meeting Document : WG-EMM-96/40 : Auteur(s): Soule, M.A., Demer, D.A.

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