Data/hora: 09/06/2024 11:53:17

Provedor de dados: | 20
País: | Belgium

Título:

Muestreo de desembarque de caballa (Scomber japonicus) en el puerto de Mar del Plata, período noviembre 2003-diciembre 2004 y resultados de la campaña de estimación de la biomasa de diciembre de 2004

Biostatistical samplings of Chub mackerel (Scomber japonicus) at the Mar del Plata port, November 2003-December 2004 period and results of a research cruise carried out during December 2004

Autores: | Perrotta, R.G.; Garciarena, A.D.; Madirolas, A.; Cabreira, A.
Data: | 2010-04-27
Ano: | 2009
Palavras-chave: | Landing statistics; Biological sampling; Growth; Fishing effort; Echo surveys; Biomass; Growth; Biomass; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24027.
Resumo: | Chub mackerel (Scomber japonicus) landings corresponding to November 2003-January 2004 and November 2004-January 2005 fishing seasons were analyzed at the Mar del Plata port (Argentina, SW Atlantic). Fourty one samples were taken to measure total length exclusively and 4 sub-samples to record individual data (total length, weight, sex, sexual stage, age according to otoliths reading). Total length ranged 20-50 cm (1 and 8 years old). The most abundant sizes, between 32-37 cm, corresponded to ages 3 and 4, respectively. Most of the fish caught were adult (95%) and mature (85%) specimens. Length-weight, length-age relations were calculated and length-growth, weight-growth parameters estimated. The catch per unit of effort, of high variability (0-2,455 kg h-1), decreased as sea surface temperature increased. To estimate the species biomass in the fishing area a research cruise was carried out between 17-20 December 2004. Measurements, obtained with acoustic methods, reached a total of 11,678 t. The highest concentrations were found at a temperature of around 17.4 ºC and salinity of 33.62 psu. During the acoustic tracking, unusual concentrations of anchovy for the season were detected.
Tipo: | Journal Contribution
Idioma: | Espanhol

Identificador:

INIDEP informe técnico, 68. p. 1-21

0327-9642

http://hdl.handle.net/1834/3455

Editor: | Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero