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Insights into reproductive dynamics and feeding biology of Sphyraena putnamae Jordan and Seale, 1905 exploited in the Indian EEZ: stock dynamics of Sphyraena putnamae

Indian Agricultural Research Journals

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Title Insights into reproductive dynamics and feeding biology of Sphyraena putnamae Jordan and Seale, 1905 exploited in the Indian EEZ: stock dynamics of Sphyraena putnamae
 
Creator R. Vinothkumar
Subal Kumar Roul
Ajay D. Nakhawa
H. M. Manas
S. Surya
C. Anulekshmi
Shubhadeep Ghosh
K. M. Rajesh
A. Margaret Muthu Rathinam
E. M. Abdussamad
Prathiba Rohit
 
Subject Sawtooth barracuda
sex ratio
protracted spawners
piscivore
management
 
Description The sawtooth barracuda Sphyraena putnamae, widely distributed in the Indo-Pacific region, isone of the commercially important barracuda species exploited by trawls in the Indian EEZ.The present study examined 2,135 S. putnamae collected during 2014-2020 from differentfish landing centres along the Indian coast, to elucidate their reproductive and feedingbehaviour. The fork length of sampled females and males varied from 12.5 to 130.9 cm and16.5 to 90.0 cm respectively. Negative allometric growth was observed with a significantdifference (p<0.05) between the sexes. The observed sex ratio (Female:Male) was 1.23:1,indicating the dominance of females. Size at sexual maturity for females and males wereestimated at 55.3 and 45.4 cm fork length respectively. The higher proportion of spawningcapable individuals and higher gonadosomatic index (GSI) values in females observedduring March to May and November-December revealed the bimodal and protractedspawning nature of this species. Absolute fecundity increased with fork length and weightand varied from 70,080 to 10,18,068 oocytes with an average of 3,16,568 oocytes. Thestomach vacuity index of females and males was 49.09 and 47.92% respectively. Fifty-nineprey items were identified in the diet, with a predominance of fishes confirming S. putnamaehas a piscivorous feeding behaviour.
Keywords:Management, Protracted spawners, Piscivore,Sawtooth barracuda, Sex ratio
 
 
Publisher Central Marine Fisheries Research Institute (on behalf of Indian Council of Agricultural
 
Date 2024-03-31
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier https://epubs.icar.org.in/index.php/IJF/article/view/131134
10.21077/ijf.2024.71.1.131134-10
 
Source Indian Journal of Fisheries; Vol. 71 No. 1 (2024)
0970-6011
 
Language eng
 
Relation https://epubs.icar.org.in/index.php/IJF/article/view/131134/54242
 
Rights Copyright (c) 2024 Indian Journal of Fisheries