Resultados de la búsqueda
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Integrating Count Effort by Seasonally Correcting Animal Population Estimates (ICESCAPE): a method for estimating abundance and its uncertainty from count data using Adélie penguins as a case study
Paper Title: Integrating Count Effort by Seasonally Correcting Animal Population Estimates ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... function of sampling availability. ICESCAPE (Integrating Count Effort by Seasonally Correcting Animal ... sites in Antarctica. These examples focus on adjusting counts of adults to an effective number of ... Béchervaise Island in years other than 2007/08 and at sites in the Mawson region other than Béchervaise ... IntegratIng Count effort by SeaSonally CorreCtIng anImal PoPulatIon eStImateS (ICeSCaPe): a method for ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... function of sampling availability. ICESCAPE (Integrating Count Effort by Seasonally Correcting Animal ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Autor(es): McKinlay, J., C. Southwell and R. Trebilco
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Fishing ground selection in the Antarctic krill fishery: trends in patterns across years, seasons and nations
remained relatively constant in Subareas 48.2 (March–May) and 48.3 (June–August). In 25 years of krill ... Paper Title: Fishing ground selection in the Antarctic krill fishery: trends in patterns across ... years, seasons and nations Abstract / Description: Patterns of fishing ground selection were ... contributors to the total catch. A recent shift in operational timing towards later months within fishing ... Science, 3: 13–30. Hewitt, R.P., D.A. Demer and J.H. Emery. 2003. An eight-year cycle in krill biomass ... Fishing ground selection in the AntArctic krill Fishery: trends in pAtterns Across yeArs, seAsons And ... 25 years of krill operations in Area 48, patterns of SSMU usage have changed. Three different ... trends in fishing patterns across years, seasons and nations. Materials and Methods Dataset STATLANT ...
Science Journal Paper : CCAMLR Science, Volume 13 (CCAMLR Science, Volume 13) : 117–141 : Autor(es): Kawaguchi, S., S. Nicol, K. Taki and M. Naganobu
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Catch per unit effort (CPUE) data from the early years of commercail krill fishing operations in the Atlantic sector of the Antarctic
the period 1975/76 to 1987/88. Comparisons are carried out between subareas in single years, between ... does not occur over time for the entire area. High average CPUE were observed in the years 1975/76 and ... Paper Title: Catch per unit effort (CPUE) data from the early years of commercail krill fishing ... operations in the Atlantic sector of the Antarctic Abstract / Description: Catch per unit effort (CPUE) data ... and for different years (a to g). (e) Season 1984185 12 10 15 20 25 30 35 40 45 50 55 60 65 ... EFFORT (CPUE) DATA FROM THE EARLY YEARS OF COMMERCIAL KRILL FISHING OPERATIONS IN THE ATLANTIC SECTOR ... subareas in single years, between years on a subarea and area basis, and between oceanic and shelf regions ... observed in the years 1975/76 and 1980/81, whereas the lowest CPUE occurred in Subarea 48.3 in 1977/78 ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 31–50 : Autor(es): Siegel, V., V. Sushin and U. Damm
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Demographic characteristics of the Adélie penguin population on Béchervaise Island after 12 years of study
after 12 years of study Abstract / Description: Demographic parameters (age-specific survival rates ... , fecundity levels and population numbers) were analysed for the Béchervaise Island Adélie penguin colony in ... eastern Antarctica after 12 years of monitoring under the CCAMLR Ecosystem Monitoring Program (CEMP). A ... changes in annual survival rates, especially of young breeding adults, than to changes in fecundity ... gg ed (m in im um a ge 4 y ea rs ) 76 54 59 30 20 28 10 25 17 30 (a ) N um be rs ... at year 0, x is years and r is the annual rate of population increase (Figure 1). In terms of ... for the Béchervaise Island Adélie penguin colony in eastern Antarctica after 12 years of monitoring ... 1997/98 are shown in Table 2 along with the numbers and percentages surviving in subsequent years ...
Science Journal Paper : CCAMLR Science, Volume 10 (CCAMLR Science, Volume 10) : 53–74 : Autor(es): Clarke, J., L.M. Emmerson, A. Townsend and K.R. Kerry
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Target strengths of krill at 136 and 20 kHz
Paper Title: Target strengths of krill at 136 and 20 kHz Abstract / Description: Estimation of ... the mean single-krill target strengths range from-71 to-77 dB at 20 kHz. Trawl hydroacoustic method ... . At the same frequency for aggregations with mean lengths in the range 41 to 47 mm the mean single ... -krill target strength is in the range-76 to-81 dB. File: 08-Kasatkina.pdf ... Krill Target Strength at Frequency 20 kHz (2) (3) Experiments were conducted in the South Orkney ... . Krill ranging in size from 30 to 58 mm in length were caught. The modal group was between 41 and 44 mm ... strength assessment at a frequency of 20 kHz are presented in Table 1. Cage target strength and the number ... majority of males (98.7%) were at Stage v. In the Maude Rise area krill ranging from 30 to 51 mm in ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 141–157 : Autor(es): Kasatkina, S.M.
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A declining trend in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons observed in fjords in two sites in the South Shetland Islands
, King George/25 de Mayo I., over a period of eight years from 1983 to 1990 and in waters around Half ... Paper Title: A declining trend in the abundance of Notothenia rossii marmorata and Notothenia ... gibberifrons observed in fjords in two sites in the South Shetland Islands Abstract / Description: A declining ... trend observed in the abundance of Notothenia rossii marmorata and Notothenia gibberifrons in fjords in ... ., over a period of eight years from 1983 to 1990 and in waters around Half-Moon 1., Moon Bay, in 1989 ... 1985/86. The six to seven years preceding this were characterized by commercial catches in the ... , implies that in future years recruitment to the commercial fisheries will be low, and recovery to levels ... 20 268 Table lA) (continued) Number of Specimens Caught in Each Replicate Level 1 Level 2 ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 263–274 : Autor(es): Barrera-Oro, E. and E. Marschoff
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Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77-1986/87
Paper Title: Analysis of changes in biomass of fish stocks in the South Georgia area in 1976/77 ... -1986/87 Abstract / Description: The swept area method was used to estimate biomass density changes in ... georgianus, Notothenia gibberifrons and Notothenia rossii marmorata) in the South Georgia area in the seasons ... 1976/77-1986/87. In most of the seasons analysed, the estimates covered a near-bottom layer in about 1 ... years, this year class might keep catches in the 1986/87 and the following season at a high level. To ... the Polish fishery, in the 11 years of observations (Figure 1). 2. MATERIAL AND METHOD The ... off South Georgia, calculated by the swept area method in the past eleven years, on the basis of ... vessel), and a length of 21-30 cm in 1986/87 (November-December, data from research catches). The ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/4 (Selected Scientific Papers, SC-CAMLR-SSP/4) : 185-211 : Autor(es): Mucha, M. and W. Ślósarczyk
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By-catch, growth and feeding of Antarctic juvenile fish taken in krill (Euphausia superba Dana) fisheries in the South Georgia area, in 1992
Paper Title: By-catch, growth and feeding of Antarctic juvenile fish taken in krill (Euphausia ... superba Dana) fisheries in the South Georgia area, in 1992 Abstract / Description: This paper discusses ... an investigation of juvenile Antarctic fish caught during krill fishing by the FV Grigory Kovtun in ... the area around South Georgia from May to July 1992. Two species were predominant in the by-catches ... from May to July 1992 in the South Georgia area. P I a a: 80- 40- 4 g 4 G - + - 60- 20- I ... they had been spawned the previous year (in May and June, according to Burchett et al., 1983). In the ... FEEDING OF ANTARCTIC JUVENILE FISH TAKEN IN KRILL (EUPHAUSIA SUPERBA DANA) FISHERIES IN THE SOUTH GEORGIA ... AREA, IN 1992 E.A. Pakh~mov',~ and S.A. Pankratovl 'Southern Scientific Research Institute of ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 129–142 : Autor(es): Pakhomov, E.A. and S.A. Pankratov
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Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area
Paper Title: Trends in relative abundance of fjord Notothenia rossii, Gobionotothen gibberifrons ... and Notothenia coriiceps at Potter Cove, South Shetland Islands, after commercial fishing in the area ... continued at Potter Cove from 1991 to 1999, and at Harmony Cove, Nelson Island, in the austral summer of ... 1995/96. Still evident is the decline in trammel-net catches of fjord-dwelling Notothenia rossii and ... performed on total and relative catches taken at PC are shown in Table 1. Split-year (1 May to 30 April ... years (1983-1990) a decrease in the stocks of juvenile N. rossii and G. gibbevifrons was demonstrated ... - thus completing a continuous sampling period of 16 years - and in the austral summer of 1995/96 at ... abovementioned sites, together with PC, are located in the King George Island area. Results of the ANOVAs ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 43–52 : Autor(es): Barrera-Oro, E.R., E.R. Marschoff and R.J. Casaux
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Observation of seabirds in the Southern Ocean in 1988/89
Paper Title: Observation of seabirds in the Southern Ocean in 1988/89 Abstract / Description ... : This paper examines the numerical and species distribution of birds in the sub-Antarctic area of the ... :00; 12:00, 16:00 and 20:00 ship-time, while sailing between Antarctic stations and while en route to ... study period are discussed as is the wide variability of numerical and species distribution in each ... shown in Figure 1. Observations lasting 30 minutes each were carried out during the daylight hours at ... witnessed in the area of Bunger Hills Station near the ice-edge. During repeat observations (9 to 20 ... 73°30'S in the Pacific sector. Most often single birds were observed and it was rare for two to be ... . Large flocks of up to 20 birds were common in summer to the east of 74°W. The number observed at one ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/7 (Selected Scientific Papers, SC-CAMLR-SSP/7) : 521–542 : Autor(es): Vagin, A.V. and V.V. Popov