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Seasonal and positional variations in the rate of nacre coating in Indian pearl oyster Pinctada fucata (Gould, 1850)

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Relation http://eprints.cmfri.org.in/13346/
http://mbai.org.in/php/journal.php?bookid=120&type=0
 
Title Seasonal and positional variations in
the rate of nacre coating in Indian pearl
oyster Pinctada fucata (Gould, 1850)
 
Creator Mary Rinju, R
Anil, M K
Sherly Williams, E
 
Subject Pearl oyster
 
Description Recently technology has been perfected for the production of quality
image pearls (mabe pearls) in India which fetches a good price ranging
from $20-50 per pearl. This study focused on variations in the rate of nacre
coating during different seasons when implanted with image pearl nucleus
in different positions of the pearl oyster shell. The implantation was done
at three positions at P1, P2 and P3 in both shells and the experiments were
repeated in three seasons namely pre monsoon, monsoon and post
monsoon. Among the positions, the position P2 which is the wide
marginal mantle region gave the maximum nacre coating rate. Hydrological
parameters such as atmospheric and water temperature, salinity, pH,
turbidity, ammonia, nitrite, nitrate, phosphate, silicate, dissolved oxygen,
primary productivity and chlorophyll a were also recorded during the
study. Rate of nacre coating was found to be maximum (6.79 ± 2.07 μ/
day) during post monsoon months corresponding to maximum productivity
(Net Primary Production of 204.40 ± 45.86 mgC/m3/day and Gross
Primary Production of 361.40 ± 96.92 mgC/m3/day) and chlorophyll
concentration (2.79 ± 0.13 mg/m³). The rate of coating was minimum
(2.19 ± 0.17 μ/day) during pre monsoon season. The influence of
hydrological parameters and positions of the implanted nuclei on the nacre
coating were statistically analysed and discussed in the present paper.
 
Publisher MBAI, Cochin-14
 
Date 2018
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/13346/1/M%20K%20Anil_2018_JMBAI_60-1_Seasonal%20and%20positional%20variations%20in%20Pinctada%20fucata.pdf
Mary Rinju, R and Anil, M K and Sherly Williams, E (2018) Seasonal and positional variations in the rate of nacre coating in Indian pearl oyster Pinctada fucata (Gould, 1850). Journal of the Marine Biological Association of India, 60 (1). pp. 5-12.