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Fishery and population dynamics of Epinephelus malabaricus (Bloch & Schneider, 1801) off Tuticorin, southeast coast of India

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Relation http://eprints.cmfri.org.in/13822/
http://mbai.org.in/php/journaldload.php?id=2503&bkid=122
doi:10.6024/jmbai.2019.61.1.2072-03
 
Title Fishery and population dynamics
of Epinephelus malabaricus (Bloch
& Schneider, 1801) off Tuticorin,
southeast coast of India
 
Creator Manojkumar, P P
Ranjith, L
Karuppasamy, K
Kanthan, K P
 
Subject Groupers
Demersal Fisheries
 
Description Fishery, population characteristics and stock estimates of grouper
with special reference to Epinephelus malabaricus from Tuticorin
were carried out during 2015-2017. Among the groupers, E.
malabaricus was the dominant resource contributing 42.2%, with
an annual average production of 420t along this region. The
asymptotic length (L∞), growth coefficient (K) and arbitrary origin of
growth (t0) were estimated at 99.75 cm, 0.53 y-1 and 0.18
respectively. The mortality parameters, the instantaneous total
mortality rate (Z), fishing mortality (F) and natural mortality rates (M)
were estimated at 1.14 y-1, 0.62 y-1 and 0.52 y-1 respectively. The
recruitment season was during April to August. The length structured
virtual population (VPA) analysis revealed a heavy fishing pressure
on length group between 40 and 55cm and there is no sign of
recruitment over-fishing in this region. The estimated maximum
sustainable yield (MSY) and annual catch were 384 t and 420 t
respectively. E. malabaricus was optimally exploited as the
exploitation ratio (E) was 0.54 but the study infers that further
increase in effort may have a detrimental effect on the stock of this
species. The results of this study will serve as baseline information
for formulating future management measures for the resource along
the coast.
 
Publisher MBAI, Cochin-14
 
Date 2019
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/13822/1/JMBAI_2019_Manojkumar%20P%20P_Fishery%20and%20population%20dynamics.pdf
Manojkumar, P P and Ranjith, L and Karuppasamy, K and Kanthan, K P (2019) Fishery and population dynamics of Epinephelus malabaricus (Bloch & Schneider, 1801) off Tuticorin, southeast coast of India. Journal of the Marine Biological Association of India, 61 (1). pp. 26-30.