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Populations dynamics of Aristeus alcocki Ramadan, 1938 (Decapoda: Penaeoidea: Aristeidae) from southwestern India

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Relation http://eprints.cmfri.org.in/12787/
https://www.sciencedirect.com/science/article/pii/S2352485518300045
 
Title Populations dynamics of Aristeus alcocki Ramadan, 1938 (Decapoda:
Penaeoidea: Aristeidae) from southwestern India
 
Creator Chakraborty, Rekha D
Purushothaman, P
Maheswarudu, G
Kuberan, G
Sreesanth, L
Ragesh, N
 
Subject Decapods
Fish biology
Crustacean Fisheries
 
Description The deepwater shrimp Aristeus alcocki Ramadan, 1938 constitutes a valuable resource among the commercially
important Indian fish stocks along the southern coast of India. However, in recent years, its
landing showed a declining trend. The present study reports the first information on its biology and stock
characteristics of this species derived from the five year data collected from the south west coast of India. A
total of 6, 312 specimens were examined, the species exhibits sexual dimorphism, with females (Carapace
length (CL): 13–56 mm) showing a wider size range with bigger size than males (CL: 13–31 mm). Monthly
age classes varied from one to four in females and males corresponding to four generations viz., 0+, 1+, 2+,
and 3+, respectively. von Bertalanffy growth curve indicated larger growth in females than males with a
mean growth parameter for females: CL ∞ = 55.78, K = 0.60, Rn = 0.253 and males: CL ∞ = 30.51,
K = 0.64, Rn = 0.358). Monthly mean size, CLmax sex ratio, longevity, and growth performance indices
(Φ) were in favor of females. K values for both the sex are the highest reported for the species, suggesting
a higher growth rate and a lower longevity. Estimated values for total, natural and fishery mortality were
also greater in females. In both the sex, an exploitation rate E >0.5 was lesser than Emax. The results of
the current study signify that the species has remained stable during the study period, in terms of its
life span, size frequency distribution and biological parameters, such as growth and mortality. These data
should be taken into account for carrying out the stock assessment in future and additional data on deep
sea recruitment success are needed to empirically parameterize population models for quantitatively
assessing the sustainability of current harvest levels.
 
Publisher Elsevier B.V.
 
Date 2018
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/12787/1/Rekha%20Devi%20Chakraborty_2018_Regional%20Studies%20in%20Marine%20Science_Populations%20dynamics%20of%20Aristeus%20alcocki.pdf
Chakraborty, Rekha D and Purushothaman, P and Maheswarudu, G and Kuberan, G and Sreesanth, L and Ragesh, N (2018) Populations dynamics of Aristeus alcocki Ramadan, 1938 (Decapoda: Penaeoidea: Aristeidae) from southwestern India. Regional Studies in Marine Science, 20. pp. 64-71.