title: Comparison of total lipids and fatty acids from liver, heart and abdominal muscle of scalloped (Sphyrna lewini) and smooth (Sphyrna zygaena) hammerhead sharks.
abstract: Liver, heart and abdominal muscle samples from scalloped (Sphyrna lewini) and smooth (Sphyrna zygaena) hammerhead sharks were analysed to characterise their lipid and fatty acid profiles. Samples were compared both between and within species, but there were no significant differences in total lipids for either comparison, although much greater total amounts were found in the liver samples. Within the individual fatty acids, the only significant differences were greater amounts of 22:6n-3, total n-3 polyunsaturates and total polyunsaturates in smooth, when compared to scalloped, hammerhead liver. This may reflect the more wide spread distribution of this species into cooler waters. Within both species the liver levels of the same fatty acid fractions decreased from spring to summer, which may correlate with changes in fatty acid profile to adapt to any differences in amount or species of prey consumed, or other considerations, eg. buoyancy, however there was no data to clarify this.
authors.affiliation: Saint James School of Medicine, PO Box 318, Albert Lake Drive, The Quarter, Anguilla, AI-2640 British West Indies.
authors.forename: Bruce Clement
authors.initials: BC
authors.lastname: Davidson
authors.affiliation: Saint James School of Medicine, PO Box 318, Albert Lake Drive, The Quarter, Anguilla, AI-2640 British West Indies.
authors.forename: Wynand
authors.initials: W
authors.lastname: Nel
authors.affiliation: Saint James School of Medicine, PO Box 318, Albert Lake Drive, The Quarter, Anguilla, AI-2640 British West Indies.
authors.forename: Afsha
authors.initials: A
authors.lastname: Rais
authors.affiliation: Saint James School of Medicine, PO Box 318, Albert Lake Drive, The Quarter, Anguilla, AI-2640 British West Indies.
authors.forename: Vahid
authors.initials: V
authors.lastname: Namdarizandi
authors.affiliation: Saint James School of Medicine, PO Box 318, Albert Lake Drive, The Quarter, Anguilla, AI-2640 British West Indies.
authors.forename: Scott
authors.initials: S
authors.lastname: Vizarra
authors.affiliation: KwaZulu-Natal Sharks Board, and Biomedical Resource Unit, University of KwaZulu-Natal, Private Bag 2, Umhlanga Rocks, 4320, Durban, 4056 KwaZulu-Natal South Africa.
authors.forename: Geremy
authors.initials: G
authors.lastname: Cliff
keywords: 22:6n-3; Buoyancy; Fatty acids; Hammerhead shark; Ketones; Lipids; n-3 polyunsaturates