AGE-DETERMINATION IN POMATOSCHISTUS-MINUTUS (PALLAS) AND POMATOSCHISTUS-MICROPS (KROYER) (PISCES, GOBIIDAE) FROM THE UPPER TAGUS ESTUARY, PORTUGAL

• Type: Article in International Scientific Journal
• Date: 1991

Authors

MOREIRA, F (Author) Other; COSTA, JL (Author) Other; Pedro Almeida (Author) Other; ASSIS, C (Author) Other; COSTA, MJ (Author) Other

Journal

Title: Journal of Fish Biology

Vol. 39

Pages: 433-440

ISSN: 0022-1112

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-001-QGN

DOI: 10.1111/j.1095-8649.1991.tb04374.x

Abstract (EN): The use of scale inspection as a means of age-determination in Pomatoschistus microps and Pomatoschistus minutus in the Tagus estuary is confirmed, but annulus formation pattern is different from that described for P. microps in the area of the British Isles (Miller, 1975). In Britain, two annuli are laid down on the scales each year, but in the Tagus, only one annulus is formed. One possible reason for this difference is the fact that in the Tagus the peak breeding season and the lowest water temperatures coincide. Therefore, the two causes of annulus formation coexist at the same time of year. Population structure in both species is dominated by the O-group, which appears earlier (April/May) than reported for other areas. Maximum age seems not to exceed 26 months in P. microps and 32 months in P. minutus. © 1991.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8