Record Details

Insights into the divergent evolution of the oceanic squid Sthenoteuthis oualaniensis (Cephalopoda: Ommastrephidae) from the Indian Ocean

KRISHI: Publication and Data Inventory Repository

View Archive Info
 
 
Field Value
 
Title Insights into the divergent evolution of the oceanic squid Sthenoteuthis oualaniensis (Cephalopoda: Ommastrephidae) from the Indian Ocean
Not Available
 
Creator Jeena, N. S.
Sajikumar, K.
Summaya Rahuman
Ragesh, N.
Said Koya, K. P.
Chinnadurai, S.
Geetha Sasikumar
Mohamed, K. S.
 
Subject Arabian Sea
haplotype network
molecular operational taxonomic units
morphotypes
PCA
phylogeny
purpleback flying squid
 
Description Not Available
Sthenoteuthis oualaniensis is known for its complex population structure with three major transoceanic forms (viz. middle-sized, dwarf, and giant forms) whose taxonomic status has been disputed for decades. This integrated taxonomic study examines these prevenient morphotypes gathered on cruises in the Indian Ocean to ascertain their status in the evolutionary history of the species. Molecular analyses employing mitochondrial (COI, ND2) and nuclear (H3) markers revealed four genetically distinct and novel lineages of the species in the Indian Ocean, representing three morphotypes from the Arabian Sea and one from the Southern Indian Ocean. The mitochondrial-based phylograms revealed two distinct clades in the species: “dwarf forms + giant form” and “middle-sized forms,” which further branch into geographically structured evolutionary units. Species delimitation analyses recovered five distinct clades, namely, the Arabian Sea giant and dwarf forms, Equatorial, Eastern Typical, and Other Middle-sized forms, representing the consensus molecular operational taxonomic units. H3 being heterozygous could not resolve the phylogeny. Haplotype network and AMOVA analysis of mtDNA genes indicated explicit phylogeographic structuring of haplotypes, whereas these outputs and PCA results were incongruent with the morphological grouping. Phenetic features distinguishing the morphotypes were sometimes plastic and mismatched with the genotypes. The giant form was genetically close to the dwarf forms, contradicting the earlier notion that it descended from the middle-sized form. It may be assumed that the dwarf form evolved following sympatric speciation and adaptation to warm equatorial waters, while the focal features of the Western Arabian Sea guide toward allopatric speciation of the giant form.
Not Available
 
Date 2023-10-20T12:13:30Z
2023-10-20T12:13:30Z
2023-09
 
Type Research Paper
 
Identifier Jeena, N. S., Sajikumar, K., Summaya Rahuman, Ragesh, N., Said Koya, K. P., Chinnadurai, S., Geetha Sasikumar and Mohamed, K. S. (2023) Insights into the divergent evolution of the oceanic squid Sthenoteuthis oualaniensis (Cephalopoda: Ommastrephidae) from the Indian Ocean. Integrative Zoology. 18(5): 924-948
1749-4877
http://krishi.icar.gov.in/jspui/handle/123456789/80732
 
Language English
 
Relation Not Available;
 
Publisher Wiley