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Identification of juvenile hilsa in Bangladesh by genetic methods
Author(s) -
RAHMAN M.,
NÆVDAL G.
Publication year - 1998
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1046/j.1365-2400.1998.00103.x
Subject(s) - juvenile , biology , genotype , identification (biology) , fishery , ecology , geography , gene , biochemistry
Knowledge of the biology and ecology of anadromous populations of the hilsa [or hilsa shad], Tenualosa ilisha (Hamilton), indicates that the juveniles are the same fish that is known locally in Bangladesh as ‘jatka’. However, this view is not always accepted by fishermen and management authorities. To confirm the status of jatka, samples were taken from inland waters, mostly from its known nursery grounds, and the genotypes and genotype distributions were compared with previous analyses of adult hilsa. With one exception, all jatka samples displayed the same patterns as adult hilsa, and the distributions of genotypes of the polymorphic systems PGM, AAT, EST (two loci) and UMP were in fairly good accordance between adult and juveniles from the same areas.