Resultados de la búsqueda
-
Do Adélie penguin fledgling weights provide an index of prey availability?
. The concerns raised by Williams and Croxall (1990) that fledgling weight may increase with an ... Abstract: We examine fledgling weights measured over 11 years at Béchervaise Island in relation ... to two assumed proxies of prey availability: breeding success and foraging trip duration. Concordance ... between the two proxies was apparent when considering guard stage foraging trip durations but this was not ...
Meeting Document : WG-EMM-05/21 : Autor(es): L. Emmerson, C. Southwell and J. Clarke (Australia)
-
An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island
tonnes for the Heard Plateau and 18 tonnes for Sliell Bank. An assessment based on the results of a ... populations on the Heard Plateau are sufficiently different from those on Shell Bank for them to be managed ... survey conducted at the end of the 1997 fishing season would allow for a catch limit on the Heard Plateau ... Paper Title: An assessment of the mackerel icefish (Champsocephalus gunnari) off Heard Island ... for at least two years. This suggests that a form of management strategy based on recent abundance ... tonnes for Sliell Bank. An assessment based on the results of a survey conducted at the end of the 1997 ... , which means that they are based on a constant catch over a 20-year period, and as such they can be ... years from the two abundant cohorts of 1 500 tonnes, comprising 900 tonnes in the first year and 600 ...
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
-
Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric characteristic?
Paper Title: Can we use discriminant function analysis to sex penguins prior to calculating an ... , morphometric characteristics have separate distributions for males and females, and these often overlap. Whilst ... certain proportion of birds. Two overlapping normal distributions are used to show that there is a ... difference between the real mean characteristic for a sex, and the apparent mean derived by sexing the birds ... characteristics (such as the CEMP characteristic AI, "weight on arrival") have separate distributions for males ... to combine males and females for the calculation of an index. This paper evaluates the suggestion ... characteristicistics in order to monitor body weight. From now on, then, I make reference only to an undescribed ... acceptable for all practical purposes. This means that the insistence on completely accurate sexing is not ...
Science Journal Paper : Selected Scientific Papers, SC-CAMLR-SSP/9 (Selected Scientific Papers, SC-CAMLR-SSP/9) : 259–272 : Autor(es): Agnew, D.J.
-
Towards an assessment of the stock of the ommastrephid squid Martialia hyadesi in the Scotia Sea: data from predators
. Martialia probably has a life span of two years and a circumpolar distribution but its biology and ecology ... Abstract: Cephalopod fisheries world-wide mainly target species from two families, Loliginidae ... and Ommastrephidae. Fisheries for the latter have been characterised by dramatically fluctuating ... squid is an important component of the diet of several species of albatross and the southern elephant ...
Meeting Document : SC-CAMLR-IX/BG/13 : Autor(es): Delegation of United Kingdom
-
An updated information of the Japanese krill fishery in the Antarctic
of two different type of operation. Operated areas in 1983/84 and 1984/85 seasons were illustrated ... and three historical main fishing grounds were identified. Author(s): Y. Shimadzu (Japan) Title: An ...
Meeting Document : WS-KCPUE-85/05 : Autor(es): Y. Shimadzu (Japan)
-
Can we use discriminant function analysis to sex penguins prior to calculating an index of a morphometric parameter?
Abstract: In sexually dimorphic species, morphometric parameters have separate distributions for ... sex of individuals, it is only able to correctly sex a certain proportion of birds. Two overlapping ... normal distributions are used to show that there is a difference between the real mean parameter for a ... . Combining all data for both sexes is considered as a procedure for avoiding the necessity of sex ...
Meeting Document : WG-CEMP-92/11 : Autor(es): D.J. Agnew (Secretariat)
-
An attempt to derive a composite index of abundance from acoustic surveys and fishery data
composite index of krill abundance (SC-CCAMLR-VIII, 1989) were derived for two surveys from these data sets ... distribution of fishing effort in the Chilean krill fishery indicate an area of high krill density wrapping ... end of the island. Author(s): R.P. Hewitt (USA), V. Marín (Chile) and D. Demer (USA) Title: An ...
Meeting Document : WG-Krill-94/14 : Autor(es): R.P. Hewitt (USA), V. Marín (Chile) and D. Demer (USA)
-
An analysis of temporal variability in abundance, diversity and growth rates in the coastal ichthyoplankton assemblage of South Georgia (sub-Antarctic)
fish diversity and abundance. Larvae of twenty two species, representing nine families, were identified ... ) and C. gunnari (Channichthyidae), dominated abundance in all years. Significant seasonal and ... significantly correlated with local SST or primary productivity. Estimates of larval growth are provided for 5 ... there has been little change in growth rate for the main species over the last three decades. Author(s ...
Meeting Document : WG-FSA-12/33 : Autor(es): M. Belchier and J. Lawson (United Kingdom)
-
An index of per capita recruitment
Paper Title: An index of per capita recruitment Abstract / Description: An index of per capita ... reproductive success and the factors postulated to affect it. The formulation of PCR is based on the ... assumptions that: (i) post-recruit mortality does not vary over age or between years; (ii) 100% of age-l ... years, and when all age-l animals spawn. These conclusions are insensitive to changes in the shape of ... appearing as a large mode at 20 to 30 mm length and in subsequent years as progressively longer length ... for Ml and c, and a is set to 0.0, PCR underestimates R/S by an average of approximately 30 ... years except for the moderate year class of 1990/91. The non-linear transformation of R1 to PCR ... converted to a series of PCR indices for Antarctic krill. DERIVATION OF AN INDEX OF PCR The PCR index ...
Science Journal Paper : CCAMLR Science, Volume 7 (CCAMLR Science, Volume 7) : 179–196 : Autor(es): Hewitt, R
-
Información presentada por la República de Angola relativa a la eliminación del Northern Warrior de las listas de barcos de pesca INDNR
de apoyo para esta solicitud, que fue presentada por Angola en 2018 y que fue recibida dentro ... . El anexo de este documento contiene la información presentada en 2018 para que los participantes ...
Meeting Document : CCAMLR-XXXVII/34 : Autor(es): CCAMLR Secretariat