Data/hora: 08/06/2024 14:03:24

Provedor de dados: | 20
País: | Belgium

Título:

Reclutamiento de la vieira patagónica, Zygochlamys patagonica (Bivalvia: Pectinidae), en el sector norte de manejo, océano Atlántico sudoccidental

Recruitment of patagonian scallop, Zygochlamys patagonica (Bivalvia: Pectinidae), North Management Sector, Southwest Atlantic Ocean

Autores: | Mauna, A.C.
Data: | 2014-06-09
Ano: | 2013
Palavras-chave: | Scallop fisheries; Catch/effort; Recruitment; Stock assessment; Shelf fronts.
Resumo: | CDATA[Patagonian scallop (Zygochlamys patagonica) is a suspension feeder bivalve that presents the highest concentrations of recruits associated to the shelf-break front; but the temporal pattern of these recruitments have not been described in detail. Given the importance of recruitments for the development of the fishery and the population dynamics of the resource, in this report space-time distribution [catch per unit of effort (CPUE) of specimens =&lt;, 15 mm, age 0+] is described and comparison between years and the Management Units (MU) 1.2 and 2 carried out. The study area corresponds to the North Management Sector of the patagonian scallop fishery (38º S-39º 30’ S, 55º W-56º W), Argentine Sea, SW Atlantic Ocean. The null hypothesis on recruitment equality means considering the relative abundance (frequency of individuals in a trawl hour) during the 1998-2010 period in the different management units was evaluated using the two-way ANOVA. The data from research vessels (1998-2007 and 2009) and those derived from commercial vessels (2008 and 2010) were considered separately. In the first case the null hypothesis of equality between means was rejected and interaction between the Year and MU factors detected (p &lt; 0.01); the null hypothesis for data from commercial vessels was not rejected (p &gt; 0.01). Successful recruitments were observed during 2000 and 2001 in both MU and in 2002 in MU 2. A classification system according to the magnitude of the recruitment CPUE is proposed.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

Revista de Investigación y Desarrollo Pesquero, 22, p. 43-57

0325-6375

http://hdl.handle.net/1834/5488

Fonte: | http://creativecommons.org/licenses/by-nc/3.0/