Résultats de la recherche

1. An index of per capita recruitment

   underestimate recruits per spawner by 30% if reasonable assumptions are made regarding the variability of ... spawner over time was confirmed by introducing cycles in the shape of the functional relationship between ... not appear to introduce additional bias. On average, PCR will underestimate recruits per spawner by ... confirmed by introducing cycles in the shape of the functional relationship between spawners and recruits ... Southern Ocean is sustained by occasional strong year classes, that adult reproductive output and pre ... -recruit survival are affected by physical and biological factors, and that monitoring these factors ...

   Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Auteur(s): Hewitt, R

2. Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area

   estimates from surveys by the FRG. These data indicate that the stock of N. rossii in 1985 was about 2.5% of ... are assessed using USSR age sample data and recent biomass estimates from surveys by the FRG. These ... known) and the net recruitment rate to the stock in each year implied by the age data. The catch at ... taken to be 100% up to age 8, the modal age class. If recruitment is assumed to be complete by this ... Table lB. The survival rate of the recruited population in each year is given by where s ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Auteur(s): Cooke, J.G.

3. Homogeneity of Adélie penguins as krill samplers

   penguins to estimate parameters of the prey population without discriminating by sex, weight or other ... parameters of the prey population without discriminating by sex, weight or other factors pertaining to the ... Buenos Aires, Argentina 253 1. INTRODUCTION The size of krill eaten by penguins is probably an ... distributions of krill eaten by penguins will also provide information on the degree of overlap between ... knowledge of the relative volume occupied by the different patches sampled, and the bias introduced will ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 253–257 : Auteur(s): Marschoff, E. and B. Gonzalez

4. International CCAMLR applied research and monitoring program, Prydz Bay priority area

   area Abstract / Description:  An outline is given of a proposed scientific research contribution by ... a proposed scientific research contribution by Australia towards the first five years of an ... confirmed by other member countries at the Fourth Meeting of the Scientific Committee of CCAMLR in ... will require a joint operation by several nations having a research capability in that area. It is ... within Prydz Bay will be carried out (by 3m beam trawl) during the summers of 1986/87 and 1987/88 ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 283-295 : Auteur(s): Australia

5. Analysis and modelling of the Soviet Southern Ocean krill fleet

   fleet. The data base consists of the records of 12 different cruises by 8 different research vessels ... fishing operation. Parameters of the model are motivated by study of the literature and FIBEX results. A ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I (Selected Scientific Papers, SC-CAMLR-SSP/5 – Part I) : 127–235 : Auteur(s): Mangel, M.

6. On assessment of Bertalanffy growth equation parameters and instantaneous natural mortality rate of South Georgia mackerel icefish

   reliable weight-length equations for males and females by season and the verification of parameters for the ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 29–36 : Auteur(s): Frolkina, Zh.A. and R.S. Dorovskikh

7. Natural mortality rate in the mackerel icefish (Champsocephalus gunnari) around South Georgia

   provide an estimate that is unaffected by confounding effects mainly due to recruitment variation, but ... that is unaffected by confounding effects mainly due to recruitment variation, but also possibly due ... of harvesting, when by definition F will be zero, Z will equate to M so that a good estimate can be ... (1990) and this was considered in detail at the WG-FSA meeting by Sparre (1989). Pending the provision ... (1990). Apparently, no analyses using M = 0.35 were undertaken at that time. The recent study by ...

   Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 245–257 : Auteur(s): Everson, I

8. 1989/1990 stock status and TAC assessment for Patagonotothen brevicauda guntheri in South Georgia subarea (48.3)

   material for 1978/79 through 1988/89 collected by Soviet scientists. VPA tuning has been accomplished using ...

   Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/6 (Selected Scientific Papers, SC-CAMLR-SSP/6) : 101–110 : Auteur(s): Shlibanov, V.I.

9. Estimating confidence intervals for fish stock abundance estimates from trawl surveys

   estimates of abundance obtained from trawl surveys conducted by means of the swept area method, using ... by means of the swept area method, using likelihood ratios from Aitchison's delta distribution ... ) progress on the statistical considerations of the swept area method was hampered by the absence of ... examined by Aitchison (1955), and Pennington (1983) has recommended using Aitchison's delta distribution ... -likelihood of a vector of observations X , ... X N from a delta distribution is given by: where N is the ...

   Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 203–207 : Auteur(s): de la Mare, W.K

10. Fish stock assessment survey in Subarea 48.3

    decline by comparison with results from the 1989/90 season. Other species do not show a similar dramatic ... have undergone a major decline by comparison with results from the 1989/90 season. Other species do ... this subarea has been emphasised by the CCAMLR Working Group on Fish Stock Assessment (WG-FSA) (SC ... -CAMLR, 1990a). This report presents the results from a fish stock assessment survey undertaken by the ... divided into CCAMLR 'fine-scale rectangles' half a degree of latitude by one degree of longitude. Within ...

    Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 25–67 : Auteur(s): Everson, I., G. Parkes, K.-H. Kock, S. Campbell, Z. Cielniaszek and J. Szlakowski

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