Indian efforts on the inventorization of marine mammal species for their conservation and management

Rajagopalan M., . and Anoop B., . and Reynold P., . and Krishnakumar P. K., . and Jayasankar P., . and Afsal V. V., . and Yousuf K. M. M., . and Krishnan Anoop A., . Indian efforts on the inventorization of marine mammal species for their conservation and management. pp. 143-155. ISSN 0116-6514

The present study is the first attempt to use molecular tools for identification of marine mammals in India. The objective was to develop a database of genetic sequences for future marine mammal research in addition to confirming the species identity of cetaceans and dugong using a molecular approach. Partial sequencing of mitochondrial DNA loci was carried out in accidentally caught/stranded specimens of Spinner dolphin (Stenella longirostris) Pantropical spotted dolphin/bridled dolphin (Stenella attenuata) Bottlenose dolphin (Tursiops aduncus) Long-beaked common dolphin (Delphinus capensis) Indopacific humpbacked dolphin (Sousa chinensis) Rissos dolphin (Grampus griseus) Finless porpoise (Neophocaena phocaenoides) Sperm whale (Physeter macrocephalus) Blue whale (Balaenoptera musculus) Brydes whale (Balaenoptera edeni) and Dugong (Dugong dugon). Molecular identification of species was done by phylogenetic reconstruction of the sequences using portals GenBank and DNA Surveillance. Apart from ratifying their morphological identification the analysis was able to distinguish specimens that otherwise could not have been identified using conventional approaches. Phylogenetic analysis of the Sousa-Stenella-Tursiops-Delphinus group indicated more or less robust monophyly for all species in this complex except Delphinus capensis. A sister-group relationship for Sperm whales and Baleen whales was evident that would place the former closer to the latter than to any other group of toothed whales.

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Abstract

The present study is the first attempt to use molecular tools for identification of marine mammals in India. The objective was to develop a database of genetic sequences for future marine mammal research in addition to confirming the species identity of cetaceans and dugong using a molecular approach. Partial sequencing of mitochondrial DNA loci was carried out in accidentally caught/stranded specimens of Spinner dolphin (Stenella longirostris) Pantropical spotted dolphin/bridled dolphin (Stenella attenuata) Bottlenose dolphin (Tursiops aduncus) Long-beaked common dolphin (Delphinus capensis) Indopacific humpbacked dolphin (Sousa chinensis) Rissos dolphin (Grampus griseus) Finless porpoise (Neophocaena phocaenoides) Sperm whale (Physeter macrocephalus) Blue whale (Balaenoptera musculus) Brydes whale (Balaenoptera edeni) and Dugong (Dugong dugon). Molecular identification of species was done by phylogenetic reconstruction of the sequences using portals GenBank and DNA Surveillance. Apart from ratifying their morphological identification the analysis was able to distinguish specimens that otherwise could not have been identified using conventional approaches. Phylogenetic analysis of the Sousa-Stenella-Tursiops-Delphinus group indicated more or less robust monophyly for all species in this complex except Delphinus capensis. A sister-group relationship for Sperm whales and Baleen whales was evident that would place the former closer to the latter than to any other group of toothed whales.

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Item Type:	Article
AGROVOC Term:	Aquatic mammals
AGROVOC Term:	Stenella
AGROVOC Term:	Stenella longirostris
AGROVOC Term:	Stenella attenuata
AGROVOC Term:	Tursiops
AGROVOC Term:	Delphinus
AGROVOC Term:	Sousa chinensis
AGROVOC Term:	Grampus griseus
AGROVOC Term:	Neophocaena phocaenoides
AGROVOC Term:	Physeter
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/7949

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