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Variation with age in the timing and duration of spawning in American plaice

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Spawning time of female American plaice Hippoglossoides platessoides varied significantly with age. This effect, however, was not consistent across years. Generally, younger fish spawned earlier than older fish, but in the 1990s they spawned later than older fish. Spawning duration also varied with age, with younger fish generally having a longer spawning period than older fish. Changes in depth distribution were related to changes in both spawning time and duration. As depth increased, spawning time became later and duration became shorter. Fish <11 years old showed the largest change in both spawning time and depth distribution.

Keywords: Hippoglossoides platessoides; age; depth; spawning duration

Document Type: Research Article


Affiliations: Department of Fisheries and Oceans, P. O. Box 5667, St. John's, NF, Canada A1C 5X1

Publication date: February 1, 2003


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