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Comparative hatchability of lake trout eggs differing in contaminant burden and incubation conditions

Technical Paper 105

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Abstract

In 1972, fertilized eggs of lake trout (Salvelinus namaycush) from the Marquette (Michigan) State Fish Hatchery (where levels of contaminants are relatively low) and eggs from lake trout collected in Michigan waters of Lake Michigan near Saugatuck and Charlevoix (where levels of PCB's and DDE are elevated) were incubated at hatchery temperatures (6° C) and at temperatures simulating the natural temperature cycle of Lake Michigan (1-8° C). Survival to yolk absorption of larvae from these three sources ranged from 40.3 to 65.5%, and no correlation was observed between survival and the level of PCB's and DDE in the eggs. Additional studies in 1975 with lake trout eggs from the same three sources confirmed previous observations that the elevated levels of PCB's and DDE in eggs from Lake Michigan did not appear to affect the percent hatch of lake trout eggs or survival of the fry to the swim-up stage. When fry hatched from eggs with an elevated contaminant burden were starved for several weeks, we observed no abnormal increase in posthatching mortality during the period when the yolk stores were being consumed.

Additional publication details

Publication type:
Report
Publication Subtype:
Federal Government Series
Title:
Comparative hatchability of lake trout eggs differing in contaminant burden and incubation conditions
Series title:
Technical Paper
Series number:
105
Year Published:
1981
Language:
English
Publisher:
U.S. Fish and Wildlife Service
Contributing office(s):
Great Lakes Science Center, Leetown Science Center
Description:
3 p.
First page:
8
Last page:
10
Online Only (Y/N):
N
Additional Online Files (Y/N):
N