alexa Elasmobranch Distribution and Assemblages in the Southern Tyrrhenian Sea (Central Mediterranean)
ISSN: 2155-9546

Journal of Aquaculture Research & Development
Open Access

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Research Article

Elasmobranch Distribution and Assemblages in the Southern Tyrrhenian Sea (Central Mediterranean)

Bottari T, Busalacchi B, Profeta A, Mancuso M*, Giordano D and Rinelli P

Institute of Coastal Marine Environment (IAMC) - CNR, Spianata S. Raineri, 86 - 98122 Messina, Italy

*Corresponding Author:
Monique Mancuso
Institute of Coastal Marine Environment (IAMC)-CNR
Spianata S. Raineri, 86-98122 Messina, Italy
Tel: 0906015438
E-mail: [email protected]

Received Date: November 26, 2013; Accepted Date: December 30, 2013; Published Date: January 07, 2014

Citation: Bottari T, Busalacchi B, Profeta A, Mancuso M, Giordano D, et al. (2014) Elasmobranch Distribution and Assemblages in the Southern Tyrrhenian Sea (Central Mediterranean). J Aquac Res Development 5:216. doi:10.4172/2155-9546.1000216

Copyright: © 2014 Bottari T, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

The aim of this study is to identify elasmobranch species present in the SouthernTyrrhenian Sea, to describe
their distribution and abundance, to identify significant spatial or temporal differences between species. 14 bottom trawl surveys were carried out from 1994 to 2007. 16 species of elasmobranchs were recorded. Multidimentional Scaling Ordination (MDS) showed two groups according to the depth gradient: in the first one the stations from upper slope and in the second one the stations from middle slope. Mean biomass indices and frequency of occurrence showed that Galeus melastomus, Etmopterus spinax and Scyliorhinus canicula were the most abundant species. Mean biomass indices for other species were very low. The mean abundance of G. melastomus exhibited a positive temporal trend in biomass and density. The mean abundance of E. spinax exhibited a negative temporal trend in biomass and in density. For other species abundance varied greatly between years, even if there was no evident trend.

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