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Biometric relationships of the black winged pearl oyster, Pteria penguin (Roding, 1798) from Andaman and Nicobar Islands

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Title Biometric relationships of the black winged pearl oyster, Pteria penguin
(Roding, 1798) from Andaman and Nicobar Islands
Not Available
 
Creator Libini,C L
Abraham,K J
Shanmugam,K
Rao,K Prakash
Kripa,V
Velayudhan,T S
Mohamed,K S
 
Subject Andaman and Nicobar Islands
Biometry
Length-weight relationships
Pteria penguin
 
Description Not Available
The dimensional biometric relationships including that of length-weight was studied in the black winged oyster Pteria
penguin, which is a candidate species for mariculture. During the life span of the winged oysters, growth in length and
weight was initially 40-100 mm dorso-ventral measurement (DVM), positively allometric and subsequently became isometric
(100-160 mm DVM) and finally reverted back to allometry (160-220 mm DVM). This is attributed to the increase in visceral
mass of animals corresponding to gonadal maturation during the size range 100 - 160 mm DVM. In larger sized P. penguin,
increase in shell length is more predominant as evidenced by large proportion of non-nacreous layer at the outer edge of the
shell. There was no parallel increase in visceral mass resulting in allometry. All dimensional relationships were positive in
relation to DVM; however the relationship between DVM and hinge length did not show significant R2 values (p>0.05) in all
the size groups. This was mainly because, the tips of the hinge and ear were found to be broken at both the ends. Therefore,
notch length is proposed as a better predictor of DVM in large hinged pterid oysters. Unlike other pterid pearl oysters, the
thickness - DVM ratio showed a decline with size, indicating that bead seeding programmes can be initiated at early stages
Not Available
 
Date 2021-09-16T05:54:25Z
2021-09-16T05:54:25Z
2011
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/62739
 
Language English
 
Relation Not Available