alexa Variation in Taxonomic Diversity of the Fish Assemblage Associated with Soft Bottoms in San Ignacio Lagoon, Baja California Sur, Mexico
ISSN: 2376-0214

Journal of Biodiversity, Bioprospecting and Development
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Research Article

Variation in Taxonomic Diversity of the Fish Assemblage Associated with Soft Bottoms in San Ignacio Lagoon, Baja California Sur, Mexico

Juaristi Videgaray Diego, Barjau Gonzalez Emelio* , Vadillo Romero Eleonora and Piera Romo Abril K
Departamento Académico de Biología Marina, Universidad Autónoma de Baja California Sur (UABCS), Apdo. Postal 19-B, La Paz, C.P. 23080, BCS, Mexico
*Corresponding Author : Barjau Gonzalez Emelio
Departamento Académico de Biología Marina
Universidad Autónoma de Baja California Sur (UABCS)
Apdo. Postal 19-B, La Paz, C.P. 23080, BCS, Mexico
Tel: +52 (612) 123 88 00, extn. 4821
E-mail: [email protected]
Received April 28, 2014; Accepted June 25, 2014; Published July 05, 2014
Citation: Emelio BG, Diego JV, Eleonora RV, Abril KPR (2014) Variation in Taxonomic Diversity of the Fish Assemblage Associated with Soft Bottoms in San Ignacio Lagoon, Baja California Sur, Mexico. J Biodivers Biopros Dev 1:118. doi:10.4172/2376-0214.1000118
Copyright: © 2014 Emelio BG, 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 San Ignacio Lagoon is one of the largest in the northwest area of Baja California Sur; it is characterized by high levels of commercial fish catch; however the number of investigations related to taxonomic diversity is low. The variation in taxonomic diversity was determined for the assemblage of fish associated with soft bottoms, at 11 locations in a period from spring of 1998 to winter of 1999. Variation in diversity of the soft bottom fish were evaluated considering the taxonomic distance between species, using the indices of alpha, average alpha, beta and gamma diversity, also the indices of taxonomic distinctness (Δ*) and average taxonomic distinctness (Δ+). Bottom trawls were performed using an experimental net to an average depth of 5 meters, between 9:00 to 17:00 hours. 1361 organisms were observed, belonging to 44 species on 35 genera. According to the average alpha, beta and gamma diversity indices, the season with higher value on average alpha diversity was summer, with 6.68 species followed by spring with 5.73 species. In beta´s case the highest value was observed during spring (21.27%) followed by summer (20.18%). Taking gamma in account, the highest values were observed during spring and summer, both seasons with 27 species each. The lowest values observed according to the average alpha beta and gamma indices, was observed during winter season (5.27, 20.18% and 20 species, respectively). In the spatial analysis, the average taxonomic distinctness index (Δ+) show a significant difference (p ≤ 0.05), while taxonomic distinctness index (Δ*) showed no significant difference (p ≥ 0.05). In the temporal analysis both indices showed no difference (p ≥ 0.05).

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