The use of PIT telemetry to study movements of ammocoetes and metamorphosing sea lampreys in river beds

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Quintella, BR (Author) Other; Andrade, NO (Author) Other; Espanhol, R (Author) Other; Pedro Almeida (Author) Other

Journal

Title: Journal of Fish Biology

Vol. 66

Pages: 97-106

ISSN: 0022-1112

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 33 Citations

Scopus - 41 Citations

Other information

Authenticus ID: P-000-627

DOI: 10.1111/j.1095-8649.2004.00584.x

Abstract (EN): Passive integrated transponder (PIT) tags were surgically implanted in I IS sea lamprey Petromyzon marinus ammocoetes which were left to recover in the laboratory for 2 months. During this period 55 individuals started to metamorphose. In the late summer of 2002 the tagged animals were released in a small tributary of the River Mondego, Portugal, and were regularly monitored for a period of 2 months Using a portable PIT tag reader. The distribution of the released animals changed from in initial uniform pattern to a random distribution. and then to all aggregated pattern. At the end of the first week 60% of the tagged sea lampreys had already left the study area, indicating their dynamic behaviour. Ammocoetes were more active than metamorphosing sea lampreys. and downstream movements were more frequent when compared to the upstream ones, which were usually a short distance. In order to determine the influence of the dark-light cycle in the diel activity rhythms. 10 tagged sea lamprey ammocoetes were released in a tank (20001 capacity) and their position monitored twice a day. for a period of I month. Ammocoetes locomotor activity appeared to be conditioned by circadian rhythms. and they were particularly active during darkness. (C) 2005 The Fisheries Society of the British Isles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10