Resultados de la búsqueda
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A three-frequency method to determine the abundance and the size of two euphausiid species (Euphausia superba and Euphausia crystallorophias)
problems, since the first Italian expedition to the Ross Sea (1989-90), a two – frequency method for the ... abundance of the two populations can be estimated by single-frequency acoustics, using the standard echo ... the austral summer, in absence of darkness. There are two methods for “in situ” target strength ... recognition of E. superba aggregations have been applied (Azzali et al., 1999). In the last two expeditions of ...
Meeting Document : WG-EMM-01/63 : Autor(es): M. Azzali, J. Kalinowksi, G. Lanciani and I. Leonori (Italy)
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Foraging zones of the two sibling species of giant petrels in the Indian Ocean throughout the annual cycle: implication for their conservation
giganteus from the Crozet Islands (46°25'S; 51°51'E) where the 2 species breed sympatrically and ... Kerguelen Island (49°19'S; 69°15'E where Northern Giant petrels breed). Distribution and activity ... more likely to overlap with high sea longlining such as tuna fisheries. Author(s): L. Thiers, K ... : Foraging zones of the two sibling species of giant petrels in the Indian Ocean throughout the annual cycle ...
Meeting Document : WG-FSA-12/67 : Autor(es): L. Thiers, K. Delord, C. Barbraud (France), R.A. Phillips (United Kingdom) and H. Weimerskirch (France)
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The three-frequency method for classifying the species and assessing the size of two euphausiids (Euphausia superba and Euphausia crystallorophias)
Abstract: In this paper an acoustic method for identifying two euphausiid species and estimating ... three expeditions to the Ross Sea (1980-90; 1997-98 and 1999-2000), where the environmental conditions ... echo-integrations, made simultaneously either at two or at three frequency, and of the results of net ... samplings, the thresholds and the decision criteria to recognize the two species are established. Next the ...
Meeting Document : WG-EMM-02/37 : Autor(es): M. Azzali, G. Lanciani and I. Leonori (Italy)
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Declining trend in the abundance of fjord fish of the species Notothenia rossii marmorata and Notothenia gibberifrons observed at two localities of South Shetland Islands
rossii marmorata and Notothenia gibberifrons from two localities of South Shetland Islands, is analyzed ... analogous published data obtained at close localities in the 60’s and 70’s, also shows a marked declination ... commercial exploitation. Author(s): E. Barrera-Oro and E. Marschoff (Argentina) Title: Declining trend in ... observed at two localities of South Shetland Islands Approval: Approved ...
Meeting Document : WG-FSA-90/14 : Autor(es): E. Barrera-Oro and E. Marschoff (Argentina)
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United States AMLR Program 1989/90 field season report
Title: United States AMLR Program 1989/90 field season report Approval: Approved ...
Meeting Document : WG-KRILL-90/07
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Discrimination of two species of grenadier (Gadiformes, Macrouridae), Macrourus whitsoni and M. caml, in the Ross Sea region of the Southern Ocean (CCAMLR Subareas 88.1 and 88.2) on the basis of otolith morphometrics
provides some evidence that they could be separate stocks in the two CCAMLR Subareas. Author(s): M.H ... Abstract: Two species of grenadier are predominatly taken as bycatch in the Ross Sea region ... used to test whether the otoliths of the two species can be discriminated. Samples of both species of ... discrimination between the two species: α = 1.254 + 0.03512* TL- 0.02463* Depth- 0.7668* Area Where α<0.5 ...
Meeting Document : WG-FSA-14/63 : Autor(es): M.H. Pinkerton, C. Ó Maolagáin, J. Forman and P. Marriott (New Zealand)
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Ageing two myctophid fishes using otolith from king and macaroni penguins in the Marion Island and its implication to feeding preference of penguins on those myctophids
and P. bolini. Author(s): M. Duan, G.P. Zhu, A. Makhado and L. Wei Title: Ageing two myctophid ... decrease for P. bolini between two readers through repeat reading runs 1 to 3. The age structures of E ... . The age structures of P. bolini are 0.5 to 4.0 years and 1.5 to 4.0 years from King penguins and ... estimation on two myctophid fishes, Electrona carlsbergi and Protomyctophum bolini. The results demonstrated ...
Meeting Document : WG-FSA-18/74 : Autor(es): M. Duan, G.P. Zhu, A. Makhado and L. Wei
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Relationships between distribution of two euphausiid species and oceanographic characteristics in the Ross Sea (January–February 2000)
, devoted to study two krill species (Euphausia superba and Euphausia crystallorophias), was carried out in ... between the two species. Euphausia superba and Euphausia crystallorophias swarms were recognized, and ... that the Euphausia superba detected biomass was about one order of magnitude greater than Euphausia ... crystallorophias one. The first species was almost exclusively present in the northern area, interesting only a ...
Meeting Document : WG-EMM-02/38 : Autor(es): A. Russo, M. Azzali, E. Biffi, G. Lanciani and E. Paschine (Italy)
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Distribution of Soviet commercial fleet at krill fishery in the South Orkneys subarea (Subarea 48.2) during 1989/90
during 1989/90 season (totally 3614 hauls for the period from 1.11.1989 to 12.06.1990 are presented ... . Actually during the whole season fishing vessels worked in one fishing ground off the north-western edge of ... earlier (Sushin, Myskov, 1992). Author(s): Sushin, V.A. Title: Distribution of Soviet commercial fleet ... at krill fishery in the South Orkneys subarea (Subarea 48.2) during 1989/90 Approval: Approved ...
Meeting Document : WG-EMM-97/50 : Autor(es): Sushin, V.A.
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Proposal to amend the fishing season for longline vessels fishing for Dissostichus eleginoides in Subarea 48.3 and trial two further 5 day season extensions
with a further two five day extensions over the next two years to the 16th and then the 11th April ... of the past two seasons and proposes moving the beginning of the fishing season to the 21st April ... . Author(s): J. Brown (United Kingdom) Title: Proposal to amend the fishing season for longline vessels ... fishing for Dissostichus eleginoides in Subarea 48.3 and trial two further 5 day season extensions ...
Meeting Document : WG-IMAF-11/09 : Autor(es): J. Brown (United Kingdom)