Результаты поиска
-
Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years of study
/decline rates of the Adélie penguin population at Béchervaise Island were found to be more sensitive to ... ‘tags’ in this paper), and sexed by cloacal examination. Two hundred marked nests were observed ... ) detec- tion by the APMS of tagged birds crossing the weighbridge; (ii) regular checks of breeding birds ... have been resighted by age 4 years). Mortality rates were calculated as 1 - px, assuming minimal ... nests currently monitored for individual breeding success by the program (in order that disturbance to ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 53–74 : Автор(ы): Clarke, J., L.M. Emmerson, A. Townsend and K.R. Kerry
-
Midwater trawl catchability in relation to krill and possible ways of assessing gross catch
by the fishery and the fishing gear used. Assessing fishing gear catchability rates and gross catch ... assessing gross catch by integrating the methods mentioned above. Yu.V. Zimarev was responsible for ... the methodology for 88 determining the retaining qualities of the trawl were handled by S.M ... trawl rope rigging and netting (kg) - krill biomass in the trawl mouth (kg). By using different ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 87–113 : Автор(ы): Zimarev, Yu.V., S.M. Kasatkina and Yu.P. Frolov
-
Modelling and decision making as part of the CCAMLR management regime
forward by Starfield et al (1986) it is proposed that development of a suite of CCAMLR management ... problems. This approach can be illustrated within the context of the ecosystem perspective advocated by ... pelagic zone by krill (Euphausia superba) (Everson 1977 and others). This species forms large ... ) and those including interactions between different trophic levels such as predation by birds or ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 295-322 : Автор(ы): Miller, D.G.M.
-
Differences in distribution and population structure of krill (Euphausia superba) between penguin and fur seal foraging areas near Seal Island
identify and evaluate their foraging areas during early January 1990/91. Penguin foraging areas were found ... ) were rather limited. In contrast, fur seal foraging areas were found in offshore regions where krill ... Program). In accordance with CEMP protocols, studies have been carried out since 1986/87 by NOAA ... . Information on instrumentation of predators will be described by NOAA in the near future. Tracking operations ... the ship was monitored every 15 minutes by radar and a satellite navigation system. 275 Tracks ... et al. (1992). 2.3 Net Sampling Prey (krill) samples in foraging areas were collected by towing ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 273–285 : Автор(ы): Ichii, T., H. Ishii, J.L. Bengtson, P. Boveng, J.K. Jansen and M. Naganobu
-
Estimating standing stock of krill using maximum entropy
Anglia Ruskin University, Cambridge, UK Email – i.everson@anglia.ac.uk The paper by Heywood et al ... Hampton results presented by Demer and Conti (2005). Something is wrong with the estimated standing ... stock by either or both methods. The Jolly and Hampton approach is simple, robust and, as Heywood et ... - bution in the predator and prey fields. Acoustically, the range is horizontally from ping by ping to ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 193 : Автор(ы): Everson, I
-
On the instantaneous natural mortality rate of Champsocephalus gunnari, South Georgia (Subarea 48.3)
and included the Heinke, Robson-Chapman methods as well as an approach outlined in a paper by ... T = age at which population biomass is at its maximum. (vi) The approach suggested by Gasiukov and ... length I; maximum age of fish of length I; The component of age group a in the catch is determined by ... 1968/69 and for the period as a whole is shown in Table 3. Mean length by age group for each season ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 313–326 : Автор(ы): Frolkina, G.A. and R.S. Dorovskikh
-
Management and uncertainty: the example of South Georgia
The stocks of fish round South Georgia have been greatly reduced by heavy fishing since 1969, and ... has been severely depleted. This is perhaps most clearly shown by the statistics. 399,704 tons were ... the indication of a high and apparently uniform fishing mortality (as indicated - 347 - by the ... (1969/70, 1970/71 and 1980/81). Some of these features could be explained by year-to-year changes in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 341-353 : Автор(ы): Gulland, J.A.
-
Age and growth of the Antarctic skate (Amblyraja georgiana) in the Ross Sea
. SHORT NOTE Francis and Ó Maolagáin 184 Introduction Skates are a major by-catch of the toothfi sh ... , the authors investigated the feasibility of ageing A. georgiana by applying a variety of techniques ... . georgiana collected from the Ross Sea by observers on board commercial longliners during the 2000/01 to ... 2002/03 seasons. Specimens were labelled by observers with pelvic length (distance between the tip of ...
Science Journal Paper : CCAMLR Science, Volume 12 (CCAMLR Science, Volume 12) : 183–194 : Автор(ы): Francis, M.P. and C. Ó Maolagáin
-
Areas of seabed within the 500 m isobath around Elephant Island (Subarea 48.1)
published by Everson (1987) based on work requested by the BIOMASS Estimates of areas of seabed within ... Georgia and standing stock biomass of demersal fish species. Elephant Island have been provided by ... (Admiralty Charts) augmented by soundings obtained during research cruises of the Federall Republic of ... , expressed as square nautical miles by a 15' latitude X 30' longitude grid within 50 m depth contours down ...
Science Journal Paper : CCAMLR Science, Volume 2 (CCAMLR Science, Volume 2) : 131–135 : Автор(ы): Kock, K.-H. and U. Harm
-
Potential nursery areas for fish in the Prydz Bay region
+. Nototheniids and channichthyid juveniles were much less common, and were found in the central and western parts ... potential of a significant by-catch of juvenile fish in krill fishing operations, the Scientific Committee ... grounds for fish should be identified as a matter of priority and the topic discussed by the Working ... survey do indicate the areas of highest young fish abundance and thus those to be avoided by krill ... fishing operations if fish by-catch is to be minimised. 2. MAlERIALS AND METHODS The Prydz Bay region ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 369–380 : Автор(ы): Williams, R.
Страницы
- « первая
- ‹ предыдущая
- …
- 34
- 35
- 36
- 37
- 38
- 39
- 40
- 41
- 42
- следующая ›
- последняя »