Search results
-
Consideration of major issues in ecosystem monitoring and management
knowledge of the abundance of different year classes. In theory, this can come from an analysis of length ... by Hewitt (2000), who defi ned a proportional recruitment index that was derived by comparing year-class ... in incoporating this impact into the model analysis. This topic is developed further in a later part ... shift 7–8 months 25–150 A3 Breeding population size >1 year 100s A4 Age specific survival 1 year 100s ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 213–232 : Author(s): Everson, I
-
Composition and characteristics of ichthyofauna in pelagic waters of South Georgia (Subarea 48.3)
distribution and early life history relevant to monitoring year-class strength and recruitment. In: Selected ... 3aHPiManH pa7nPiYHbIe YqaCTKkl: MOJIOAb, KaK npasano, BcTpeqanacb Ha mre, ~ s p o c n a x - Ha ceeepe ... of juvenile fish in the shelf areas of South Georgia and Shag Rocks over several years. This paper ... of abundant fish species. Vessel Cruise number Year Date Number of hauls: South Georgia Shag Rocks ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 125–164 : Author(s): Frolkina, G.A., M.P. Konstantinova and I.A Trunov
-
Editorial
of the CCAMLR Scientific Committee. Over those 30 years, several thousand scientific papers have been presented ... striking changes over the past 30 years is the increase in the number of scientific journals in which work ... be relevant to CCAMLR to contact the CCAMLR Representative for their country (or the CCAMLR Secretariat ... Committee. Over those 30 years, several thousand scientific papers have been presented to CCAMLR meetings ... with the 30th meeting of the CCAMLR Scientific Committee. Over those 30 years, several thousand scientific ... -making by CCAMLR. One of the most striking changes over the past 30 years is the increase in the number ... for their country (or the CCAMLR Secretariat) to investigate ways to maximise the potential impact ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 167 : Author(s): Editors
-
Estimating the impact of depredation by killer whales and sperm whales on longline fishing for toothfish (Dissostichus eleginoides) around South Georgia
been more frequently encountered in recent years, occurring in larger pod sizes, whereas killer whale ... to 20%. Sperm whales have been more frequently encountered in recent years, occurring in larger pod ... encountered in recent years, occurring in larger pod sizes, whereas killer whale encounters and pod sizes ... whales (Orcinus orca) in the Southern Ocean have been well documented in recent years, most recently ... ) and replacing the lost catch. In addition, fishery managers must decide how to account for what can ... levels of depredation, which have varied from year to year since 2001 (SC-CAMLR, 2007a). Currently only ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 163–178 : Author(s): Moir Clark, J. and D.J. Agnew
-
Status of the Polish FIBEX acoustic data from the West Atlantic
High Cross, Madingley Road Cambridge CB3 OET, United Kingdom J. Kalinowski Istituto di Ricerche ... strength / length relationship later recommended by WG-Krill (SC-CAMLR, 1991a): Much of the survey ... the focus of commercial fishing activity in recent years (cf. Everson and Goss, 1991; Ichii et al., 1994 ... in abundance from March to June. Siegel (1988) suggested that the timing of this pattern varied between years ... densities of krill in the oceanic parts of the Drake Passage were low (3 g m-2); however, the results also ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 125–132 : Author(s): Trathan, P.N., J. Kalinowski and I. Everson
-
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
site distribution contributing to the aggregate dis- tribution has already been formed using sam ... fractions were assumed to be 1). The ICESCAPE estimation procedure was applied to the adult data, with dis ... of uncertainty (e.g. Law, 1962; Ensor and Bassett, 1987). In the interests of promoting a precau- tionary ... unpublished data collected at Béchervaise Island in years other than 2007/08 and at sites in the Mawson ... animal count data to a common reference point of breeding chronology for species with a complex temporal ... reported measures of uncertainty associated with originally published counts are propagated through to the ...
Science Journal Paper : CCAMLR Science, Volume 17 (CCAMLR Science, Volume 17) : 213–227 : Author(s): McKinlay, J., C. Southwell and R. Trebilco
-
A simple approach for calculating the potential yield of krill from biomass survey results
-exploitation level over a 20 year period of harvesting should equal 10%. The value of, λ depends strongly ... -exploitation level over a 20 year period of harvesting should equal 10%. The value of, λ depends ... the mass of laiU of age a at the start of the "year" (wa) is given by: (A.3) In the middle ... of the initial deterministic age-structure has been lost. (iv) In year y = 10 (the year before fishing ... year period of harvesting should equal 10%. The value of 'A, depends strongly on the value ... to exploitation, over a 20 year period of harvesting, is equal to 10%. Clearly the value of A. is dependent ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Author(s): Butterworth, D.S., A.E. Punt and M. Basson
-
Biogeographic patterns of benthic invertebrate megafauna on shelf areas within the Southern Ocean Atlantic sector
to the sorting area for weighing. Additional basket loads were counted and dis- carded. In this way, an average ... - munities, if not for disturbance. The severity of dis- turbance regime, whether by icebergs or by fishing ... ; Gordon et al., 2000). This pattern effectively mirrors the dis- tribution of echinoderm-dominated ... habitats into zoogeographical provinces date back to the early 20th century (Koehler, 1912; Hedgpeth ...
Science Journal Paper : CCAMLR Science, Volume 15 (CCAMLR Science, Volume 15) : 167–192 : Author(s): Lockhart, S.J. and C.D. Jones
-
Krill distribution in the western Atlantic sector of the Southern Ocean during 1983/84, 1984/85 and 1987/88 based on the results of Soviet mesoscale surveys conducted using an Isaacs-Kidd midwater trawl
stretching from the Antarctic Peninsula to the eastern part of the South Orkneys area. The greatest ... of water flow from southern areas). It is also demonstrated that the absence of krill in the eastern part ... to the eastern part of the South Orkneys area. The greatest variability of krill distribution on the spatial ... demonstrated that the absence of krill in the eastern part of the Scotia Sea may cause it to be absent from ... ) in approximately 110 days, i.e. from early November to the middle of February. In this regard, krill stock ... stretching from the Antarctic Peninsula to the eastern part of the South Orkneys area. The greatest ... of water flow from southern areas). It is also demonstrated that the absence of krill in the eastern part ... years covered only pa r t of Subarea 48.1 adjacent to the north of the Antarctic Peninsula and did ...
Science Journal Paper : CCAMLR Science, Volume 6 (CCAMLR Science, Volume 6) : 59–70 : Author(s): Sushin, V.A. and K.E. Shulgovsky
-
Effect of line sink rate on albatross mortality in the Patagonian toothfish longline fishery
di6metro respectivamente. Figura 2: Configuraci6n de 10s palangres del In Sling 66 (sistema espafiol ... -and-hook bearing 11.5 mm mother line with each end attached to 100 kg anchors, which were used to sink ... of the snoods on the mother line from the anchors. The anchors were attached to 18 mm ropes which rose from ... the mother line. Snood lines were 3 mm in diameter and 50 cm in length. Line Setting and Hauling ... weights. Asymptotic sink rates (0.1-0.15 m/s) were achieved with 70 m intervals between 6.5 kg weights ... . Sink rates to 4 m depth were greatest with 35 m (0.44 m/s) and 50 m (0.33 m/s) between weights. For ... /s should greatly reduce the incidental take of albatrosses. For autoline vessels with gear and line ... -setting characteristics similar to the experimental vessel, this sink rate should be achievable with 4 kg ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 133–150 : Author(s): Robertson, G.G