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Population dynamics of Meretrix casta (Gmelin, 1791) along Thoothukudi, Gulf of Mannar, India

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Title Population dynamics of Meretrix casta (Gmelin, 1791) along Thoothukudi, Gulf of Mannar, India
 
Creator Takar, S
Jawahar, P
Gurjar, U R
Kingston, S D
Neethiselvan, N
Pereira, J J
Jagadis, I
 
Subject Exploitation
Growth & mortality parameters
Meretrix casta
Population
Thoothukudi
 
Description 618-624
The present study was performed to understand the population dynamics and current status of Meretrix casta stock along the
southern coast of Tamil Nadu, India. The estimated value for asymptotic length, growth coefficient and growth performance
index was 5.41 cm, 0.77 year-1 and 1.35, respectively. The value of t0 was recorded to be -0.07529 years. The instantaneous rate
of total mortality (Z), fishing mortality (F) and natural mortality (M) was estimated at 2.58 yr-1, 0.98 yr-1 and 1.60 yr-1,
respectively. Virtual population analysis showed that fishing mortality was higher in the largest group (41 – 50 mm). The
current exploitation rate (U) and exploitation ratio (E) were recorded as 0.35 and 0.38, respectively, which was lower than
the Eopt = 0.5 criterion. The present study indicated that the exploitation of M. casta is near to optimum level and suggests
further scope to increase the fishing effort for the optimum harvest of M. casta from the studied region. However, regular
monitoring programs should be implemented to sustain these resources.
 
Date 2022-09-29T05:17:34Z
2022-09-29T05:17:34Z
2022-09
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/60555
https://doi.org/10.56042/ijms.v51i07.51654
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJMS Vol.51(07) [July 2022]