The status of the worlds albatrosses are reviewed within the framework of the taxonomic changes proposed by Nunn et al. (1996) and Robertson and Nunn (this volume). The latest estimates of size of breeding populations (pairs) at all known localities of each of the 24 proposed species are presented; population trends are assessed where sufficient data are available. Despite increased efforts in population monitoring the status (i.e. population trends) of two-thirds of the worlds ca. 150 albatross populations remain unknown. For those that are known, almost half are declining. The threats currently facing each species are briefly reviewed. The best available evidence indicates that longline fishing is the most serious threat facing albatrosses today. Twenty of the 24 species are known to be killed on longline hooks, including rare and endangered species. Widespread implementation of appropriate mitigation measures is urgently required.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
There is no abstract available for this document.
Abstract:
This paper presents a model of Sequential Population Analysis (SPA), based in catch at age data, for the evaluation of the state of the stock of Dissostichus eleginoides from the area 48.3 between 1992 to 1996. This, with the objective of knowing the results of management of this stock made under CCAMLR procedures. The model was programmed in a spreadsheet (Excel v.5) using the Solver function for the non-lineal calculus process. The application of this model, tuned by auxiliary information of effort, shows that the estimation of recruitment and the level of the TAG are extremely similar to those calculated by the WG-FSA in 1995 when F2/3 was applied, which allowed height level of spawning biomass per recruit escape. This event was even higher than that suggested by the rule of decision γl of CCAMLR. By other hand, the descent trends in Total, Fishable and Spawning Biomass showed a stabilization during the last year (1996) in relation to the previous ones. This result supports the idea that the use of the stochastic projections adopted by consensus last year, has produced an appropriate and promising assessment.
