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Informe de resultados de la campaña Fletán Ártico 2003

Authors: Paz, Xabier; González-Iglesias, María de la Concepción; Ceballos, Elvira; Román-Marcote, Esther;

Informe de resultados de la campaña Fletán Ártico 2003

Abstract

La Campaña Fletán Ártico 2003 ha sido dirigida y realizada por el Equipo de Pesquerías Lejanas del IEO del Centro Oceanográfico de Vigo. Es la 7ª de una serie destinada a obtener índices de abundancia y conocer la estructura de la población de fletán negro (Reinhardtius hippoglossoides) en el área de Protección del Archipiélago Svalbard, División IIb del CIEM. Por cuarto año consecutivo el barco fue el B/C Garoya Segundo. La Campaña se desarrolló entre los días 4 al 26 de octubre, realizándose 150 pescas en un rango de profundidad entre 523 y 1418 metros, en el talud oeste del mencionado archipiélago, entre las latitudes 73º 30´N y 80º N. Se recogieron gónadas de fletán negro y platija americana para estudiar su fecundidad; se recogieron otolitos de fletán negro, platija americana y bacalao para estudios de crecimiento; se analizaron los contenidos estomacales de las principales especies ícticas para conocer su dieta alimenticia. La especie más abundante fue el fletán negro, con una captura de 151952.2 Kg., seguida del lirio, 2029.9 Kg. El resto de las especies no alcanzaron el 5% de la captura total. Los valores estimados de la biomasa y la abundancia de fletán negro, 283644.1 Tm, y 256327 miles de individuos respectivamente, resultaron algo superiores a los del año anterior, alcanzando el nivel del año 2001. Esto muestra el inicio de una evolución positiva, variando la tendencia negativa, debido probablemente a un cambio en la distribución estacional.

The “Fletán Ártico 2003” bottom trawl survey has been directed and performed by Distant Fisheries Team of the IEO, Oceanographic Center of Vigo. It is the 7th in a series designed to obtain abundance indices and know the structure of the population of black halibut (Reinhardtius hippoglossoides) in the Svalbard Protection Area, ICES Division IIb. For the fourth year the boat used was the C/V “Garoya Segundo”. The survey ran from the 4th to October 26th, performing 150 hauls in a depth range between 523 and 1418 meters, on the western slopes of that archipelago, between latitudes 73º 30'N and 80°N. Gonads were collected from Greenland halibut and American plaice to study their fertility, were collected otoliths from Greenland halibut, American plaice and cod growth studies, were analyzed the stomach contents of the main fish species to know their diet. The most abundant species was the black halibut, with a catch of 151952.2 kg, followed by the Blue whiting (Micromesistius poutassou), 2029.9 Kg. The remaining species do not reach the 5% of the total catch. The estimated values of biomass and abundance of black halibut, 283644.1 tons, thousands of individuals and 256327 respectively, were somewhat higher than the previous year, reaching the level of 2001. This shows the beginning of positive developments, changing the negative trend, probably due to a change in the seasonal distribution.

Equipo de Pesquerías Lejanas. Centro Oceanográfico de Vigo

Keywords

especies de profundidad, depth species, ICES Div. IIb, dieta y alimentación, campaña científica de pesca de arrastre, Greenland halibut, Div. IIb CIEM, bottom trawl survey, Ártico, Arctic, Centro Oceanográfico de Vigo, Food and feeding, fletán negro, Pesquerías

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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