Результаты поиска
-
Spatio-temporal trends of longline fishing effort in the Southern Ocean and implications for seabird by-catch
Ocean’s longline fleets on seabird populations, this paper describes the trends in longline effort of the ... the more recent development and expansion of demersal longline fleets for species such as Patagonian ... toothfish, these vessels are a major source of mortality to several species of seabird. Vessels can set many ... thousands of baited hooks in a day across many kilometres of water. These waters are often used as foraging ...
Meeting Document : WG-FSA-02/43 : Автор(ы): G.N. Tuck, T. Polacheck and C.M. Bulman (Australia)
-
Comparison of temperature situation near South Georgia in December–February, 1989–1990, 1990–1991, 1999–2000 and 2000–2001 on satellite data and information about krill catches in Subarea 48.3
Abstract: Monitoring of the sea surface temperature (SST) in Subarea 48.3 on satellite data (GOES ... -E, Meteosat), use of in situ data and the further analysis of the SST maps, maps of the SST ... survey area. Analysis of this situation based on data obtained in expeditions, as well as literature and ... the CCAMLR materials could allow us to assess, with a certain degree of reliability, a potential ...
Meeting Document : WG-EMM-01/11 : Автор(ы): G. Vanyushin (Russia)
-
Relationships between the distribution of whales and Antarctic krill Euphausia superba at South Georgia
Abstract: The distribution of whales and krill in two survey boxes north of South Georgia was ... examined by comparing sightings and underway acoustic data collected as part of a multidisciplinary ... research cruise during January/February 1998. A total of 222 cetaceans of 10 species was recorded with ... frequent. The largest aggregation of cetaceans (21 southern right whales, 18 fin whales (Balaenoptera ...
Meeting Document : WG-EMM-99/30 : Автор(ы): K. Reid, A.S. Brierley (United Kingdom) and G.A. Nevitt (USA)
-
Foraging response of Antarctic fur seals to changes in the marine environment
Abstract: This study examined the relative contribution of environmental variation and the ... seasonal demands of pup rearing on the foraging behaviour of female Antarctic fur seals Arctocephalus ... recorders measured the diving behaviour of 72 individuals during a total of 385 foraging trips totalling ... 1964 d at sea. The frequencies of krill, fish and squid in the diet were estimated from prey items ...
Meeting Document : WG-EMM-99/35 : Автор(ы): D.J. McCafferty, I.L. Boyd, T.R. Walker and R.I. Taylor (United Kingdom)
-
ENTANGLEMENT OF ANTARCTIC FUR SEALS ARCTOCEPHALUS GAZELLA IN MAN-MADE DEBRIS AT BIRD ISLAND, SOUTH GEORGIA DURING THE 2007 WINTER AND 2007/08 BREEDING SEASON
Abstract: Results of the survey of entanglements of Antarctic fur seals Arctocephalus gazella at ... summer (November 2007 to March 2008) are reported here. During the reporting period of 1 April 2007 to 31 ... March 2008 a total of 36 entangled seals were observed. Sixteen and 20 entanglements were observed in ... for 25% of winter and 10% of summer entanglements. During winter, synthetic string/longline material ...
Meeting Document : WG-FSA-08/27 : Автор(ы): E.W.J. Edwards (UK)
-
DEVELOPMENT OF A METHODOLOGY FOR DATA QUALITY ASSESSMENT
Abstract: Measures are developed which aim to summarise the quality of fishing event, catch, and ... biological sampling data from a fishing trip. In particular these measures aim to quantify the prevalence of ... position or time reporting errors, the diversity of catch, the extent to which catch data follow Benford ... 's Law for the distribution of the first significant digit, whether length-frequency data have been ...
Meeting Document : WG-SAM-08/13 : Автор(ы): D.A.J. Middleton and A. Dunn (New Zealand)
-
Water mass distribution and circulation west of the Antarctic peninsula and including Bransfield Strait
Abstract: Historical hydrographic data from Bransfield Strait and the region west of the ... Antarctic Peninsula were analyzed to provide a description of water mass distributions and circulation ... patterns. Circumpolar Deep Water (CDW), which is characterized by temperatures above 1.0°C, salinities of ... this water mass floods the continental shelf west of the Antarctic Peninsula. CDW is also found in ...
Meeting Document : WG-EMM-95/67 : Автор(ы): Smith, D.A., Lascara, C.M., Klinck, J.M., Hofmann, E.E.
-
Spatial scales of benthic invertebrate habitats from fishery by catch and video transect data in the Ross Sea region
presence of sponge and/or gorgonian bycatch are identifiable, as are several areas of dense fishing effort ... with no evidence of sponge or gorgonian presence. Identifiable sponge and/or gorgonian habitats ... occurred at a typical scale of 10-30 km 2, though some sponge habitats appeared larger. Spatial analysis of ... these data allows the detectability of sponges and gorgonian corals to be estimated, along with changes ...
Meeting Document : WG-EMM-10/28 : Автор(ы): S.J. Parker, R.G. Cole and S.M. Hanchet (New Zealand)
-
A tale of two islands: contrasting fortunes for sub-Antarctic skuas at the Prince Edward Islands
Abstract: Subantarctic skuas Catharacta antarctica are key predators of burrowing petrels at sub ... -Antarctic islands, and can be used to monitor the health of burrowing petrel populations. A survey of skuas ... December 2001. Prince Edward Island (46 km 2) remains free of introduced mammals, whereas Marion Island ... (290 km 2) had a feral population of cats from the 1950s to 1980s, and still supports a large ...
Meeting Document : WG-EMM-10/P03 : Автор(ы): P.G. Ryan, P.A. Whittington and R.J.M. Crawford
-
Evaluating the impact of multi-year research catch limits on overfished toothfish populations
Abstract: In stocks that have been depleted by overfishing, the benefits of additional fisheries ... delaying the recovery of such stocks. Through simulating a Dissostichus eleginoides stock that has been ... subjected to varying levels of overfishing and research catches, this study show that stocks can take ... decades to recover even in the absence of fishing, and apparently low levels of research catches can ...
Meeting Document : WG-FSA-10/42 Rev. 1 : Автор(ы): D.C. Welsford (Australia)
Страницы
- « первая
- ‹ предыдущая
- …
- 311
- 312
- 313
- 314
- 315
- 316
- 317
- 318
- 319
- …
- следующая ›
- последняя »