We use data collected on the CCAMLR-IWC Krill Synoptic Survey (2000) to investigate relationships between cetacean density, krill density and oceanographic conditions. We explore the use of generalized additive models (GAMs) to model these relationships, and show how these models can provide abundance estimates for sub-areas within the survey region, as well as for the survey region itself. Abundance estimates from a simple conventional line transect analysis are also presented.
Abstract:
The first three cruises in the 'year round' Southern Ocean GLOBEC series for 2001-2002 were conducted from March - June 2001. International Whaling Commission researchers participated in all three cruises (Gould LMG 01-03 USA mooring cruise, Polarstern AntXVIII5b ship and helicopter based studies Germany, Nathaniel B Palmer NBP 01-03 USA survey cruise). A combination of ship, zodiac and helicopter based visual survey, tissue biopsy, and photo identification techniques were used on the vessels by the IWC. Passive acoustic moorings and expendable sonobuoys were deployed by the US passive acoustic team. The most frequently recorded and abundant baleen whale species in the study area were minke and humpback whales. An initial overview of oceanographic data shows strong patterns of correlation between autumn and early winter baleen whale distribution, the inshore cold Antarctic coastal current, and upwelling of this cold water produced by intrusions of the Antarctic Circumpolar Current into Marguerite Bay. Confirmation of krill autumn migration into inshore waters associated with complex bathymetry (ie. dense aggregations in deep pools or holes) was made on these surveys. This indicates that baleen whale prey is available throughout all seasons. Baleen whales were observed in Marguerite Bay as late as June, and it is likely that both humpback and minke whales overwinter in this region. These preliminary associations will be tested during the winter NB Palmer cruise (July - September) and through modelling and analysis planned between IWC and SO GLOBEC in 2001. The 2002 series of cruises will further test these and other physical and biological associations.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
Abstract:
The eighth annual beach debris survey was carried out at Cape Shirreff (62º 28' S., 60º 48' W.), Livingston Island, South Shetland Islands, Antarctica during the austral summer 2000/2001. All debris were collected once a month during January and February 2001 from 36 places, just when the snowmelt occurred.
The debris were counted by beaches, measured, weighed and classified into four categories: Plastic, metal, glass, and paper. A total of 1,774 articles was studied, with a weight of 124, 5 kg. As it used to occur during all previous Antarctic seasons plastic material was the most abundant item with 1,736 articles which represent 97.86% of the total. The other items consisted of metal, 15 articles (0,85%), glass, 16 articles (0.90%), and paper, 7 pieces (0.30%).
It is important to note that 589 plastic bands were found at the site, which represent 34% of all plastic items. From these bands, 40 were ringlike, and 48 had the form of loops with knots. This is an evidence of an act against the Conservation Measure 63/XV, and against the Annex IV of the Madrid Protocol. Besides, several articles, mainly plastics, were total or partially oiled, as well as a single wing of a kelp gull Larus dominicanus, and as it occurred in previous seasons, some plastic articles were found partially burnt.
Sixty three plastic items were identified as of Korean origin (3.6%) including several printed plastic bands, corresponding to a 51% of the total identified items. For the first time it was recorded an article from Philippines.
It is necessary to reinforce the CCAMLR plan to divulge the poster and cards calling to all Parties to cooperate with the protection of the marine environment.
Abstract:
In this paper the boundaries of the CCAMLR statistical areas are examined for their relevance to the management of the krill fishery. A rationale for developing some new areas is developed based on data on krill distributions. The overall aim of the exercise was to reduce the large size of many of the existing statistical areas to the point where all areas where krill occur could be surveyed by a single vessel. Areas where krill appeared to be generally absent were separated from those areas where krill appeared to be abundant. Areas where there were identified concentrations or “stocks” were kept intact wherever possible. The resultant map of suggested management areas results in a series of subdivisions of far more regular size than the existing map of Statistical Areas.
There is no abstract available for this document.
There is no abstract available for this document.
Abstract:
El Uruguay ha desarrollado un Programa de Relevamiento de Desechos Marinos en
las áreas costeras próximas a sus instalaciones en el Area del Tratado Antártico y por
tanto en el Area de la Convención correspondiente a la Subárea Estadística 48.1, donde
se encuentra la B.C.A.A. (Base Científica Antártica Artigas), en Isla Rey Jorge (o Isla
25 de Mayo), realizándose el relevamiento de desechos en las playas seleccionadas en la
costa accesible desde la base en la Antártida.
La finalidad del programa es la de colaborar con las funciones de la Comisión en el
análisis de la efectivización de la conservación, mediante el seguimiento de indicativos
que a través de su manifestación como factores que pueden afectar los recursos vivos
marinos antárticos, dan pautas de la orientación de las actividades de recolección y
conexas hacia la utilización racional de estos recursos, en el cumplimiento de las
disposiciones de la Convención y las medidas acordadas en su conformidad.