NEPHROPS-NORVEGICUS IN THE GALICIAN CONTINENTAL-SHELF (NW SPAIN) - ABUNDANCE AND DISTRIBUTION

被引：17

作者：

FARINA, AC

FREIRE, J

GONZALEZGURRIARAN, E

机构：

[1] Instituto Español de Oceanografia, 15080 A Coruña

[2] Departamento de Bioloxía Animal, Universidade da Coruña, 15071 A Coruña, Campus da Zapateira s/n

来源：

FISHERIES RESEARCH | 1994年 / 19卷 / 3-4期

关键词：

D O I：

10.1016/0165-7836(94)90048-5

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

This paper examines the abundance and distribution of Nephrops norvegicus during 13 fishery survey cruises carried out between 1980 and 1991 on the Galician continental shelf (NW Spain). Average annual abundance values fluctuate between 3 and more than 90 specimens per 30 min tow, with the highest densities found between 100 and 200 m in the Mino to Fisterra area, and at over 200 m in the Fisterra to Estaca de Bares area. Catches of this species were very scarce in the area between Estaca and Ribadeo. Mapping of N. norvegicus distribution, carried out using geostatistical analysis techniques, points to the existence of patches ranging in size between 20 and 117 km in length in the different cruises, which are located in two major areas, off the Rias Baixas and north of Fisterra. Depth is not a determining factor of N. norvegicus abundance and distribution within the area under study. There is a coincidence, on a medium scale, between the presence of this species and areas having fine sediment (between 20 and 60% of fine fraction less than 62.5 mum) on the shelf, and the distribution was restricted to the area between Mino and Estaca.

引用

页码：333 / 347

页数：15

共 31 条

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