Resultados de la búsqueda
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Proposed observer logbooks for the 2019 longline and finfish trawl fisheries
adoption for the beginning of the 2019 fishing season. Author(s): CCAMLR Secretariat Title: Proposed ... Abstract: The first CCAMLR Scheme of International Scientific Observation workshop (WS-SISO) was ... fisheries (see SC-CCAMLR-XXXVI/08). This paper summarises the proposed changes to the observer logbooks for ... the longline and finfish trawl fisheries, and outlines their introduction leading up the proposed ...
Meeting Document : WG-FSA-17/03 : Autor(es): CCAMLR Secretariat
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Dynamics of abundance and state of Notothenia rossii rossii stocks on the Kerguelen Island shelf
Kerguelen Island shelf from the beginning of the fishery to 1984 has been examined.Total and commercial ... Abstract: Population structure and dynamics of the abundance of Notothenia rossii rossii on the ... calculation by mathematical modelling.Comparative estimates of the abundance and recruitment-remainder ratio ... for the period of 1970-1984 have been presented, the average age of recruitment has been stated ...
Meeting Document : WG-FSA-90/41 : Autor(es): P.B. Tankevich and V.A. Shlyakhov (YugNIRO, USSR)
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Variation in the distribution of Antarctic krill Euphausia superba around South Georgia
krill were found in Weddell Sea water and that the length-frequency distributions at the western end of ... the island contained more large krill that those from the eastern end of the island. We consider such ... experience different conditions during transport to South Georgia and at either end of the island. Author(s ... Abstract: Between 1980 and 1997 British Antarctic Survey carried out 11 cruises in the region of ...
Meeting Document : WG-EMM-97/47 : Autor(es): Daly, H.I., Murray, A.W.A., Watkins, J.L.
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VARIATION IN DEMERSAL FISH SPECIES RICHNESS IN THE OCEANS SURROUNDING NEW ZEALAND: AN ANALYSIS USING BOOSTED REGRESSION TREES
constrained to reflect the known performance of trawl gear. Species richness declined with increasing cod-end ... characteristics using an extensive collection of trawl data from the oceans around New Zealand. Analyses were ... ‘stochastic gradient boosting’). Depth was the single most important environmental predictor of variation in ... their depth. Variables describing trawl length, trawl speed, and cod-end mesh size made a substantial ...
Meeting Document : WS-VME-09/P04 : Autor(es): Leathwick, J.R., Elith, J., Taylor, P., Francis, M.P., Hastie, T.
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SPATIAL AND TEMPORAL VARIATION IN ATTRIBUTES OF ADELIE PENGUIN BREEDING POPULATIONS: IMPLICATIONS FOR UNCERTAINTY IN ESTIMATION OF THE ABUNDANCE OF BREEDING PENGUINS FROM ONE-OFF COUNTS
with date-specific correction factors to estimate the population attempting to breed at the beginning ... adults, nests or chicks across several or many breeding sites, and the timing of these counts is often ... outside the control of researchers. Time series counts of Adelie penguin breeding population attributes ... (adults, nest and chicks) within the breeding period show considerable variability across space and time ...
Meeting Document : WG-EMM-PSW-08/07 : Autor(es): C. Southwell, J. McKinlay, R. Pike, D. Wilson, K. Newbery and L. Emmerson (Australia)
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KRILL FISHERY BEHAVIOUR IN THE SOUTHWEST ATLANTIC
mean travel distances are longer after the least catch levels, and the travel distances decreases as ... close even after considerable number of hauls. The scales of distance after 50 tows from the original ... to year variability in the probabilities of operating within a local range after a number of tows. In ... the 1999/2000 season the probability that hauls would be made within a 30nm range after 300 hauls was ...
Meeting Document : WG-EMM-08/39 : Autor(es): S. Kawaguchi (Australia)
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CALIBRATION ERROR IN THE AMLR PLANKTON TIME SERIES
Abstract: Analysis of the time series of the volume of water filtered during tows using a 1.8 m ... Isaac-Kidd Midwater Trawl (IKMT) from 1992 to 2007 showed a marked decline (~35%) in the volume of water ... filtered beginning in 2000. Analysis of tow time duration, reported ship speed during tows, and mean number ... of rotor counts from the flow meters showed no significant trends. The discrepancy in volume is ...
Meeting Document : WG-EMM-08/19 : Autor(es): C. Reiss (USA)
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A case of giant squid attack on Antarctic toothfish Dissostichus mawsoni Norman, 1937 (Perciformes, Nototheniidae) caught on bottom-set longline in the Ross Sea
Abstract: In the beginning of February 2005, during the hauling of bottom-set longline in the ... Ross Sea (East Antarctic) from the depth of 1480 m to the surface a very large squid taken a large ... by a longline hook, was hauled up to the board of longliner VOLNA. Squid was very active and did not ... aboard but it was registered with the use of photo- and video cameras. This allowed to determine its ...
Meeting Document : WG-FSA-06/P3 : Autor(es): Petrov, A.F.
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A suggested bottom trawling survey on the Ob and Lena Banks
hydrodynamic forces opening the codend. These forces, different for different cod end constructions, have great ... Abstract: The paper presents calculations of water flow velocity through the codend under the ... assumption that the flow is uniform and equal on its entire surface. The calculations were made for different ... ratios of cod end length to its diameter, mesh bar length to mesh bar diameter, and for various mesh ...
Meeting Document : WG-FSA-93/10 : Autor(es): W. Moderhak (Poland)
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Analysis of krill trawling positions north of the South Shetland Islands (Antarctic Peninsula area), 1980/81–1999/2000
krill, especially at the beginning of the operation each season. In summer, biological factors that ... Abstract: Inter- and intra-annual variability of commercial krill trawling positions for the 1980 ... /81 to 1999/2000 seasons in the area to the north of South Shetland Islands were analyzed in relation ... to biological and environmental factors. Commercial fishing perations concentrated on the outer shelf ...
Meeting Document : WG-EMM-01/35 : Autor(es): S. Kawaguchi and K. Segawa