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Study on the fishery and biology of the mantis shrimp Oratosquilla nepa (latreille) of south kanara coast during 1979-83

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Relation http://eprints.cmfri.org.in/354/
 
Title Study on the fishery and biology of the mantis shrimp
Oratosquilla nepa (latreille) of south kanara coast
during 1979-83
 
Creator Sukumaran, K K
 
Subject Prawn and Prawn fisheries
 
Description The catches of Oratosquilla nepa along the South Kanara coast were maximum
during 1981-82, amounting to 2543.3 t at a catch rate of 16.5 kg|h at Mangalore
and to 1868.8 t at 16.7 kg|h at Malpe. The catch was high during January-
April. A mean growth of 7-8 mm|month was indicated. The species appear to
grow to it length of about 108 mm by the end of first year and to live for 15-16
months. In the development of the ovary, five maturity stages, ie., immature, early
maturing, late maturing, mature and spent|spent-recovering, have been recognised.
The size at maturity at 50% level is estimated at 95 mm. The spawning season
is found to be extending from December to October with peaks during March-June
and September-October. Females generally outnumbered males. Chi-square test
showed significant variation from 1:1 ratio in the distribution of sexes. The fecundity
is estimated at 6,78,200 in a female measuring 108 mm body length. The
growth parameters, 1 a, and c.k were estimated at 143 mm and 0.2877 respectively.
The mean.monthly Z values were 0.9767 for males and 0.923d for females.
 
Publisher CMFRI/ICAR
 
Date 1987
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/354/1/Article_08.pdf
Sukumaran, K K (1987) Study on the fishery and biology of the mantis shrimp Oratosquilla nepa (latreille) of south kanara coast during 1979-83. Indian Journal of Fisheries, 34 (3). pp. 292-305.