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A method for distinguishing the sex of the oil-sardine, Sardinella longiceps Val. in the field

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Relation http://eprints.cmfri.org.in/1885/
 
Title A method for distinguishing the sex of
the oil-sardine, Sardinella longiceps
Val. in the field
 
Creator George, K C
 
Subject Fishery biology
Fish biology
 
Description Sex studies form an important part of fishery biological investigations and
as such easy methods of distinguishing the sexes of commercially important
fishes will lighten the work of determining their sex. Well-known
examples of conspicuous secondary sexual characters are found in some
of the cyprinids and cyprinodonts (Norman, 1957) and such characters help
us to distinguish the sexes of those fishes easily. In many teleosts the genital
and urinary pores open on a more or less prominent papilla. Among the
clupeoids, O'Connell (1955) makes mention of a median muscular ridge
in Sardinops ccerulea, extending from the rectal portion of the intestine
and bearing the genital and urinary pores. He terms this ridge, as urogenital
papilla. There is no indication of the sex of the fish in which such a
papilla has been observed. Determination of the sex in clupeoid fishes have
almost always been done by dissection and examination of the gonads.
But, while studying the sex composition and maturity of the oil-sardine,
Sardinella longiceps, the presence of a muscular papilla bearing the genital
and urinary pores has been observed in the male and a membranous one in
the female. On the basis of those characters the fish can be sorted out into
the two sexes without actual dissection.
 
Publisher CMFRI/ICAR
 
Date 1959
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1885/1/Article_09.pdf
George, K C (1959) A method for distinguishing the sex of the oil-sardine, Sardinella longiceps Val. in the field. Indian Journal of Fisheries, 6 (2). pp. 322-326.