Результаты поиска

1. Competition-mediated prey availability drives Adélie penguin (Pygocelis adeliae) chick size, mass and condition at colonies of differing size in the southern Ross Sea

   foraging.  In addition, we show that in some cases, increased intraspecific competition may be a more ... populations.  Body size, mass and condition may be important determinants of an organism’s ability to survive ... periods of low resource availiability or high metabolic demand.  Such effects may be particularly ... presence of two giant icebergs from 2001 to 2005 increased sea ice concentrations, reducing adult foraging ...

   Meeting Document : WG-EMM-13/31 : Автор(ы): A.L. Whitehead (Australia), P. O’B. Lyver (New Zealand), G. Ballard (USA), K. Barton, B.J. Karl (New Zealand), D.G. Ainley, K. Dugger, S. Jennings (USA), A. Lescroël (France) and P.R. Wilson (New Zealand)

2. A three-frequency method to determine the abundance and the size of two euphausiid species (Euphausia superba and Euphausia crystallorophias)

   integration method. This implies that species can be identified indirectly, from visual analysis of echograms ... that organisms must occur in low concentrations and echo level from a single organism must be greater ... -February 2001. The results are compared with those obtained from the standard method. Author(s):  M. Azzali ... abundance of the two populations can be estimated by single-frequency acoustics, using the standard echo ...

   Meeting Document : WG-EMM-01/63 : Автор(ы): M. Azzali, J. Kalinowksi, G. Lanciani and I. Leonori (Italy)

3. A multivariate approach to examining patterns in research fishing activities using the SSRU 88.2A–B North survey as an example

   criteria to assess the likelihood that a vessel is operating as would be expected in normal research ... activities”, further noting that a characterisation of fishing activities was also required in order to ... the time taken to haul a line as a metric, and estimate vessel effects associated with fishing events ... such as research surveys. Results showed that individual vessels exhibited significantly different ...

   Meeting Document : WG-FSA-16/46 : Автор(ы): S. Mormede, A. Dunn, S.J. Parker, T. Earl, C. Darby, M. Söffker and O.R. Godø

4. A statistical method for analysing the extent of IUU fishing in CCAMLR waters: application to Subarea 48.3

   estimate the total number of days of IUU fishing that could occur during each year. For each IUU incident ... occurred. This was the time that elapsed between the FPV cruises that were immediately prior to and ... immediately subsequent to the incident, where these prior and subsequent cruises had not detected that same ... time that the vessel can have been present. 3. This theoretical maximum time was converted to actual ...

   Meeting Document : WG-FSA-02/4 : Автор(ы): D.J. Agnew and G.P. Kirkwood (United Kingdom)

5. Informe de la campaña de investigación biológico-pesquera de palangre de fondo en aguas del Atlántico sur-oriental y en los sectores Atlántico e índico de la CCRVMA (Subárea 48.6 y División 58.4.4)

   be related to the beginning of migratory movements that make them inaccessible to fishing with bottom ... to increase length with depth seems to be somehow disturbed by inflections or alterations related to ... stratum with highest catch per unit effort was that of 600-800 m though absolute values varied between ... toothfish (D. eleginoides) with 2822 individuals (83.24 %). Macrourus carinatus was the second species in ...

   Meeting Document : WG-FSA-98/48 : Автор(ы): L.J. López Abellán y J.F. González Jiménez

6. Morphometrics, maturity and movement of the Antarctic skates Amblyraja georgiana and Bathyraja eatonii in the Ross Sea

   . The regressions for these species should be used with caution. The length at 50% maturity for male A ... sexes combined. It is probable that large females are larger and heavier than males of the same size ... length at 50% maturity of male and female B. eatonii could not be accurately determined, but may be ... -area 88.1 over the 1999–2000 through 2001–02 seasons. Returns suggest some long-term survival, small ...

   Meeting Document : WG-FSA-02/42 : Автор(ы): M.P. Francis and N.W. McL. Smith (New Zealand)

7. Assessment of toothfish in Subarea 48.3, 2006

   the region 3300 – 3600 t would be consistent with CCAMLR decision rules. Author(s):  D.J. Agnew, R ... 48.3. We provide sensitivity runs that include revised maturity and catch weighted proportion at length ... trends and construct a model that uses age-based observations, specifically estimates of catches at age ... derived from otolith examination of a random sample of the catch. 3. All the assessments suggest that the ...

   Meeting Document : WG-FSA-06/53 : Автор(ы): D.J. Agnew, R. Hillary, M. Belchier, J. Clark and J. Pearce (United Kingdom)

8. Preliminary assessment of Dissostichus eleginoides on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003

   estimate for 2004 was 2,680 t. Initial tests of length at age assumptions indicated that using a specified ... that it may be appropriate to adjust estimates of cohort strength for catchability where possible. The ... length at age vector that did not include growth beyond 15 years had only small effects on projected long ... of the length distribution of the catches suggest that the two gears sample a similar range of sizes ...

   Meeting Document : WG-FSA-03/33 : Автор(ы): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)

9. Preliminary assessment of mackerel icefish, Champsocephalus gunnari, on the Heard Island Plateau (Division 58.5.2) based on a survey in April–May 2003

   steady yield if possible need to be explored further in the development of a management procedure that ... approximately 20% of the 2002 estimate. This decline in abundance is consistent with the passage of the strong ... the strength of this cohort will not be possible until the May 2004 survey is complete. The estimates ... ) implementations indicated that the GYM version provided slightly higher estimates of short-term yield. These ...

   Meeting Document : WG-FSA-03/32 : Автор(ы): A.J. Constable, C.R. Davies, R. Williams and T. Lamb (Australia)

10. RESOURCES EVALUATION OF ANTARCTIC KRILL EUPHAUSIA SUPERBA DANA USING AREAL TRAWLING AND HYDRO-ACOUSTIC DATA

    . Traditional concepts of observation system concerning the resources of krill should be further developed with ... provided with probability methods and spatial analyses requiring knowledge of statistical distribution ... population densities have shown mixed rules of statistical distribution over its natural habitat. Data ... analyses procedures applied for trawling and hydro-acoustic sampling have to in compliance with the rules ...

    Meeting Document : WG-SAM-08/P01 : Автор(ы): L.A. Kovalchuk (Ukraine)

Страницы