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Comparison of the reproductive biology of two stocks of Indian subcontinental Mugil cephalus (Linnaeus, 1758) with special reference to reproductive isolation and philopatry

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Title Comparison of the reproductive biology of two stocks of Indian subcontinental Mugil cephalus (Linnaeus, 1758) with special reference to reproductive isolation and philopatry
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Creator Rekha.M.U
Sherly Tomy
Krishna Sukumaran
Vidya.R
M. Kailasam
CP.Balasubramanian
KK.Vijayan
 
Subject East coast
Mugil cephalus
Philopatry
Reproductive Biology
Reproductive isolation
West coast
 
Description Not Available
The study of reproductive biology is a prerequisite for fishery management and conservation. The current study aimedto compile all available information on the reproductive biology of the grey mullet, Mugil cephalus from two geographical regions of India, Cochin backwaters (west coast; n = 362) and Pulicat (east coast; n = 223) southern India to decipher the possible differences in reproductive and biological attributes between the geographical groups. The LWR showed isometric growth (b = 3.08) for females on the west coast and positive allometric growth (b = 3.338) on the east coast, whereas the males showed negative allometric growth on both coasts. The sex ratio (male: female) recorded in this study was 1:1.2 on the west coast and was well balanced. On the east coast, the sex ratio was 1: 2.09 and deviated significantly from the expected 1:1 ratio. The gonadal morphology and developmental pattern were the same for both groups of M. cephalus. The length at maturity values of both males (L50 = 349.3 mm TL on the west coast and 375.8 mm TL on the east coast) and
female (L50 = 437.6 mm TL in the west coast and 394.9 mm TL in the east coast) showed a significant difference between two groups. Seasonal distribution of GSI and maturity stages suggested that the spawning period of M. cephalus was between May and July coinciding with the onset of the southwest monsoon on the west coast while on the east coast it was between December and January months during the north-east monsoon. The reproductive isolation and philopatry in westand east coast M. cephalus groups are discussed based on the observations on the spatio-temporal distribution of fishes inthe sampling areas
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Date 2022-10-06T08:13:07Z
2022-10-06T08:13:07Z
2021-02-01
 
Type Journal
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/74685
 
Language English
 
Relation Not Available;
 
Publisher Not Available