Migratory behavior of adult sea lamprey and cumulative passage performance through four fishways

Canadian Journal of Fisheries and Aquatic Sciences
By: , and 

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Abstract

This article describes a study of PIT-tagged sea lamprey (Petromyzon marinus) ascending four fishways comprising three designs at two dams on the Connecticut River, USA. Migration between dams was rapid (median migration rate = 23 km·day−1). Movement through the fishways was much slower, however (median = 0.02–0.33 km·day−1). Overall delay at dams was substantial (median = 13.6–14.6 days); many fish failed to pass (percent passage ranged from 29% to 55%, depending on fishway), and repeated passage attempts compounded delay for both passers and failers. Cox regression revealed that fishway entry rates were influenced by flow, temperature, and diel cycle, with most lampreys entering at night and at elevated flows, but with no apparent effect of sex or length. Overall delay was influenced by slow movement through the fishways, but repeated failures were the primary factor determining delay. These data suggest that although some lamprey were able to pass fishways, they did so with difficulty, and delays incurred as they attempted to pass may act to limit their distribution within their native range.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Migratory behavior of adult sea lamprey and cumulative passage performance through four fishways
Series title Canadian Journal of Fisheries and Aquatic Sciences
DOI 10.1139/cjfas-2016-0089
Volume 5
Issue 74
Year Published 2017
Language English
Publisher NRC Research Press
Contributing office(s) Leetown Science Center
Description 11 p.
First page 790
Last page 800