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Fishery, reproductive biology and diet characteristics of Bombay duck <i>Harpadon nehereus</i><span style="mso-bidi-font-style:italic"> from the Saurashtra coast </span>

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Title Fishery, reproductive biology and diet characteristics of Bombay duck Harpadon nehereus from the Saurashtra coast
 
Creator Ghosh, Shubhadeep
 
Subject Bombay duck
Fishery
Spawning
Food and feeding
Dol nets
Saurashtra
 
Description 418-426
Fishery,
reproductive biology and diet characteristics of Bombay duck Harpadon nehereus landed by dol netters along the Saurashtra coast was studied during
2006 – 2009. Annual average catch was 25,479 t with
catch rate of 378.6 kg unit-1 forming 22.44% of the total dol net
catches. Bulk of the catch was landed during September – January and in May.
Length weight relation differed significantly between males, females and
indeterminates. Growth was isometric in males but allometric in females and
indeterminates. Overall sex ratio was 1.05 and length at first maturity was
214.5 mm. Gravid and ripe females were observed throughout the year with peak
occurrence during April – June. Mature ovaries contained immature (0.2 - 0.39
mm), maturing (0.5 - 0.69 mm) and mature ova (0.8 - 0.89 mm). Total fecundity
was between 8467 and 102079. Non penaeid prawns viz., Acetes and Nematopalaemon
tenuipes was the most important food
item in the diet followed by sciaenids, unicorn cod and juveniles of Bombay
duck. Fishes with empty stomachs were encountered in high numbers. Juveniles
fed mostly on non penaeid prawns
while adults preferred both finfishes and prawns. Feeding intensity was more in
adults and less in juveniles. The reproductive biology and food and feeding
were found to vary significantly between years.
 
Date 2014-03-06T07:03:32Z
2014-03-06T07:03:32Z
2014-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/27333
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.43(3) [March 2014]