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Characterisation of an individual of the giant form of the purpleback flying squid Sthenoteuthis oualaniensis (Cephalopoda: Ommastriphidae) in the Arabian Sea and its biological descriptors

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Relation http://eprints.cmfri.org.in/15521/
https://www.tandfonline.com/doi/full/10.1080/13235818.2021.2003513
10.1080/13235818.2021.2003513
 
Title Characterisation of an individual of the giant form of the purpleback flying squid Sthenoteuthis oualaniensis (Cephalopoda: Ommastriphidae) in the Arabian Sea and its biological descriptors
 
Creator Sajikumar, K K
Najmudeen, T M
Ragesh, N
Jeena, N S
Rahuman, Summaya
Sunil, K T S
Sasikumar, Geetha
Mohamed, K S
 
Subject Fish biology
Cephalopods
Molluscan Fisheries
 
Description This paper describes a mated female of the giant form of purpleback flying squid Sthenoteuthis oualaniensis (545 mm dorsal mantle length and 5.46 kg body weight) caught in the Arabian Sea, with biological, morphological, and molecular descriptors. Based on the growth increments within statoliths, its age was found to be 203 days with a high growth rate of 2.68 mm DML/day. Its diet contained squids (72.3%) and fish (27.3%) with a high degree (70%) of cannibalism. The total fecundity of the individual was estimated as 702,240 eggs. Three species of parasites were found, two species of Platyhelminthes from the mantle
cavity (Phyllobothrium sp. and Nybelinia sp.) and one of Nematoda from the stomach (Anisakis simplex). The COI barcode confirmed the identity of the giant form as S.
oualaniensis, and the high genetic divergence (6.18–9.35%) that was observed between the current specimen and other forms from various oceans points to the probability that it
might be a genetically distinct lineage from the northern Indian Ocean. The present record forms the southernmost (10°05′ N) record of the giant form of this flying squid.
 
Publisher Taylor and Francis
 
Date 2021
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/15521/1/Molluscan%20Research_2021_Saji%20Kumar%20K%20K.pdf
Sajikumar, K K and Najmudeen, T M and Ragesh, N and Jeena, N S and Rahuman, Summaya and Sunil, K T S and Sasikumar, Geetha and Mohamed, K S (2021) Characterisation of an individual of the giant form of the purpleback flying squid Sthenoteuthis oualaniensis (Cephalopoda: Ommastriphidae) in the Arabian Sea and its biological descriptors. Molluscan Research. pp. 1-10.