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

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Title A method for distinguishing the sex of
the oil-sardine, Sardinella longiceps
Val. in the field
Not Available
 
Creator George,K C
 
Subject sex determination
oil-sardine
Sardinella longiceps
 
Description Not Available
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.
Not Available
 
Date 2021-08-04T10:11:20Z
2021-08-04T10:11:20Z
1959
 
Type Article
 
Identifier Not Available
Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/52970
 
Language English
 
Relation Not Available
Not Available
 
Publisher CMFRI/ICAR