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Population dynamics of Bombay duck <i style="">Harpadontidae nehereus</i> (Ham. 1822) (Teleostomi / Harpadontidae) from Mumbai waters, India

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Title Population dynamics of Bombay duck Harpadontidae nehereus (Ham. 1822) (Teleostomi / Harpadontidae) from Mumbai waters, India
 
Creator Balli, Johnson J.
Chakraborty, S K
Jaiswar, A K
 
Subject Population dynamics
Growth parameters
Mortality parameters
H. nehereus
 
Description 67-70
Growth parameters were estimated for H. nehereus are =434 mm, K= 0.81 / yr and to= 0.0406 yr. Total, natural
and fishing mortality were estimated as 4.33, 1.30, and 3.03 respectively. The
M/K ratio was found to be 1.60. Length at first capture was found as at the place
of found 210 mm. Present exploitation ratio (E) was calculated as 0.70.
According to knife edge selection, the optimum E should be 0.66 at which at
least 20% of virgin biomass is still available for exploitation. However, the
catch has declined and mesh size regulation is difficult to implement as the
dol net is a multispecies gear. One of the best measures for the fishery to sustain
is by fishers themselves is that they suspend fishing activities when the catch
is poor and non-remunerative.
 
Date 2011-03-29T07:17:09Z
2011-03-29T07:17:09Z
2011-02
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/11372
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.40(1) [February 2011]