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Reproductive biology of Nematalosa nasus (Bloch, 1795) off Mangalore coast, Karnataka

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Relation http://eprints.cmfri.org.in/10801/
 
Title Reproductive biology of Nematalosa nasus (Bloch, 1795) off Mangalore coast, Karnataka
 
Creator Ramya, V C
Benakappa, S
Anjanayappa, H N
Jayaraj, E G
Somasekara, S R
Mahesh, V
 
Subject Fish biology
 
Description Nematalosa nasus is one of the important species comes under shads belongs to the clupeids group, clupeiod
fisheries is one of the major fisheries in Indian country. In the present study, the complete reproductive biology with breeding
seasonality of N. nasus along Mangalore coast studied for the first time. Six maturity stages were described macroscopically
(male and female) and microscopically (female) throughout the maturation cycle. The spawning season in Mangalore lasts from
September (2013) to April (2014), with peak spawning activity in October (2013) and November (2013). The size at first
maturity was estimated to be 162 mm for both male and female respectively. The size frequency distribution of oocytes (ova
diameter) provided evidence for its multiple spawning. The batch fecundity of this species was estimated between 1,02,093 to
8,32,129 eggs per individual. GSI indicated protracted spawning which extend from September (2013) to April (2014). The
overall sex ratio exhibited equally was 1:1 (Male : Female).
 
Date 2016
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/10801/1/Nematalosa%20nesus_Mahesh_2016_Journal%20of%20Experimental%20Zoology.pdf
Ramya, V C and Benakappa, S and Anjanayappa, H N and Jayaraj, E G and Somasekara, S R and Mahesh, V (2016) Reproductive biology of Nematalosa nasus (Bloch, 1795) off Mangalore coast, Karnataka. Journal of Experimental Zoology, India, 19 (1). pp. 313-319. ISSN 0972-0030