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Fecundity of the American eel Anguilla rostrata at 45°N in Maine, U.S.A.

Journal of Fish Biology

By:
and
DOI: 10.1111/j.1095-8649.1997.tb02004.x

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Abstract

The northern portion of the geographic range of the American eel Anguilla rostrata may contribute a great proportion of the reproductive potential to this panmictic species because of apparent increases in average female size and female percentage with latitude. The regressions of fecundity on body length and on body weight of 63 female eels captured at about 45° N latitude on their spawning migration to the sea were log F= 1·2601 + 2·9642 log L and log F= 4·1646+0·9153 log W, where F is fecundity, L is total length (cm), and W is total weight (g). Length and weight each explained about 90% of the variation in fecundity. Estimates of fecundity from counts of aliquots of eggs ranged from 1·84 million to 19·92 million eggs for eels ranging in length from 45 to 113 cm, nearly the range of sizes of migrating females reported in the literature. Fecundities of the American eel were greater than reported in one study at about 37° N and greater than reported for the European eel, A. anguilla, shortfin eel, A. australis, and longfin eel, A. dieffenbachii. If a geographic cline in fecundity does exist in American eels, it is established anew each generation because the species forms a single panmictic population.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Fecundity of the American eel Anguilla rostrata at 45°N in Maine, U.S.A.
Series title:
Journal of Fish Biology
DOI:
10.1111/j.1095-8649.1997.tb02004.x
Volume
51
Issue:
4
Year Published:
1997
Language:
English
Publisher:
Wiley
Description:
8 p.
First page:
840
Last page:
847
Online Only (Y/N):
N
Additional Online Files(Y/N):
N