Resultados de la búsqueda
-
Further computations of the consequences of setting the annual krill catch limit to a fixed fraction of the estimate of krill biomass from a survey
values for age-at-first- assumed knife-edge maturity and selectivity, and capture a n d maturi ty ... yr.' (natural mortality) oR = 0.4 (recruitment variability) a, = 3 yr (knife-edge age-at ... -recruitment) a,,, = 3 yr (knife-edge age-at-maturity) a+ = l + y r (age-range corresponding to biomass ... ] is a uniform distribution over the range [a, bl. Instead of knife-edge forms for the selectivity ...
Science Journal Paper : CCAMLR Science, Volume 1 (CCAMLR Science, Volume 1) : 81–106 : Autor(es): Butterworth, D.S., G.R. Gluckman, R.B. Thomson, S. Chalis, K. Hiramatsu and D.J. Agnew
-
Edición de 2023 del Manual del Observador Científico de las Pesquerías de Peces
. Equipment: Use a large knife with a rigid blade to make incisions, and fine pointed forceps for collecting ... a shallow vertical cut with the knife at the posterior extremity of the head (Figure 10), but ... that are to be tested must be weighed and measured prior to processing. Use a sharp knife or a tube ...
Document : Site Section: Science
-
Length-based assessments revisited – why stock status and fishing mortality of long-lived species such as toothfish cannot be inferred from length-frequency data alone
with natural mortality, and knife-edge selectivity. But departure from the steady-state assumption ... which older fish accumulated. The removal of catch was modelled through three knife-edge fishing ... function is knife-edged, while the maturity function is not, Pmat includes some immature fish and is thus ...
Science Journal Paper : CCAMLR Science, Volume 18 (CCAMLR Science, Volume 18) : 57–73 : Autor(es): Ziegler, P.E., D.C. Welsford and A.J. Constable
-
A first attempt at an assessment of the Patagonian toothfish (Dissostichus eleginoides) resource in the Prince Edward Islands EEZ
sensitivity test. Note that for simplicity, both maturity and fishing selectivity are assumed to be knife ...
Science Journal Paper : CCAMLR Science, Volume 9 (CCAMLR Science, Volume 9) : 11–32 : Autor(es): Brandão, A., D.S. Butterworth, B.P. Watkins and D.G.M. Miller
-
An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
3. This shows that recruitment to the fishery was knife-edged at age 3 in the 1997 season. Even ... the fishery was considered to be knife-edged at age 3. The fourth trial examined the consequences ...
Science Journal Paper : CCAMLR Science, Volume 5 (CCAMLR Science, Volume 5) : 79–101 : Autor(es): de la Mare, W.K., R. Williams and A.J. Constable
-
Champsocephalus gunnari en Georgia del Sur (Subárea 48.3)
2.0 to 2.5 and 2.95 (knife-edge) was examined where all age 1+ fish were included in the assessment ...
Document : Site Section: Publications
-
Fishery Report: Champsocephalus gunnari South Georgia (Subarea 48.3)
). Selectivity 14. A knife-edge selectivity vector was used for C. gunnari, starting at 2.5 years and fully ...
Document : Site Section: Publications
-
Fishery Report: Champsocephalus gunnari South Georgia (Subarea 48.3)
14. A knife-edge selectivity vector was used for C. gunnari, starting at 2.5 years and fully ...
Document : Site Section: Publications
-
Assessments of the stocks of Notothenia rossii marmorata and Champsocephalus gunnari in the South Georgia area
data sets. 1.4 Annual Recruitment Rates If the recruitment to the fishery were a knife-edged ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/3 (Selected Scientific Papers, SC-CAMLR-SSP/3) : 1-21 : Autor(es): Cooke, J.G.
-
A simple approach for calculating the potential yield of krill from biomass survey results
, and is the (knife-edge) age-at-first-capture. M F(y) ar These equations assume that the number ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/8 (Selected Scientific Papers, SC-CAMLR-SSP/8) : 207–217 : Autor(es): Butterworth, D.S., A.E. Punt and M. Basson