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Sex ratios and maturation patterns o...

Ingraham, Danielle Lisa.

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Sex ratios and maturation patterns of the American eel, Anguilla rostrata (LeSueur), in four locations of the Saint John River system, New Brunswick.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Sex ratios and maturation patterns of the American eel, Anguilla rostrata (LeSueur), in four locations of the Saint John River system, New Brunswick./
Author:	Ingraham, Danielle Lisa.
Description:	118 p.
Notes:	Source: Masters Abstracts International, Volume: 38-04, page: 0912.
Contained By:	Masters Abstracts International38-04.
Subject:	Biology, Zoology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ46258
ISBN:	9780612462588

Sex ratios and maturation patterns of the American eel, Anguilla rostrata (LeSueur), in four locations of the Saint John River system, New Brunswick.
Ingraham, Danielle Lisa.

Sex ratios and maturation patterns of the American eel, Anguilla rostrata (LeSueur), in four locations of the Saint John River system, New Brunswick. - 118 p.

Source: Masters Abstracts International, Volume: 38-04, page: 0912.

Thesis (M.Sc.)--University of New Brunswick (Canada), 1999.

Collections of American eels, Anguilla rostrata, were obtained from commercial fishermen at four locations in the Saint John River system, New Brunswick. Male eels were present in down river study areas, but were absent from upriver locations. Mean lengths of eels differed among sites, with a progressive increase from down river to up river locations. At a given length, up river eels were heavier than down river eels. Female eels were larger than male and sexually undifferentiated eels at all locations. Male eels had larger average eye indices than female and sexually undifferentiated eels. Eye index was not strongly correlated with length, gonadosomatic index (GSI) or date for Saint John River eels. Mean gonadosomatic index differed significantly among female, male and sexually undifferentiated eels of the same color group with females having larger GSIs. Color was not an indicator of the stage of gonadal development and was not correlated with GSI or eye index. This information should lend to a further understanding of American eel biology in the northern part of its range.

ISBN: 9780612462588Subjects--Topical Terms:

1018632
Biology, Zoology.

Sex ratios and maturation patterns of the American eel, Anguilla rostrata (LeSueur), in four locations of the Saint John River system, New Brunswick.
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035 $a (UMI)AAIMQ46258
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040 $a UMI $c UMI
100 1 $a Ingraham, Danielle Lisa. $3 1924541
245 1 0 $a Sex ratios and maturation patterns of the American eel, Anguilla rostrata (LeSueur), in four locations of the Saint John River system, New Brunswick.
300 $a 118 p.
500 $a Source: Masters Abstracts International, Volume: 38-04, page: 0912.
500 $a Advisers: Tillmann Benfey; Richard Peterson.
502 $a Thesis (M.Sc.)--University of New Brunswick (Canada), 1999.
520 $a Collections of American eels, Anguilla rostrata, were obtained from commercial fishermen at four locations in the Saint John River system, New Brunswick. Male eels were present in down river study areas, but were absent from upriver locations. Mean lengths of eels differed among sites, with a progressive increase from down river to up river locations. At a given length, up river eels were heavier than down river eels. Female eels were larger than male and sexually undifferentiated eels at all locations. Male eels had larger average eye indices than female and sexually undifferentiated eels. Eye index was not strongly correlated with length, gonadosomatic index (GSI) or date for Saint John River eels. Mean gonadosomatic index differed significantly among female, male and sexually undifferentiated eels of the same color group with females having larger GSIs. Color was not an indicator of the stage of gonadal development and was not correlated with GSI or eye index. This information should lend to a further understanding of American eel biology in the northern part of its range.
590 $a School code: 0823.
650 4 $a Biology, Zoology. $3 1018632
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
690 $a 0472
690 $a 0792
710 2 $a University of New Brunswick (Canada). $3 1057458
773 0 $t Masters Abstracts International $g 38-04.
790 1 0 $a Benfey, Tillmann, $e advisor
790 1 0 $a Peterson, Richard, $e advisor
790 $a 0823
791 $a M.Sc.
792 $a 1999
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=MQ46258