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| Format: | Artículo científico |
| Language: | en |
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Universidad Autónoma de Baja California
1996
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| Online Access: | https://www.redalyc.org/articulo.oa?id=48022202 |
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Table of Contents:
- Cambios espaciales y temporales de la estructura comunitaria de los cetáceos en Bahia de La Paz, B.C.S, México (1988-1991) Sergio Flores Ramírez Guillermo Villarreal Chavez Ruben Valles Jimenez Jorge Urban R. Ciencias de la Tierra ecology cetaceans community diversity Gulf of California At two different ecological zones (Canal de San Lorenzo and transitional), located at Bahía de LaPaz, we analysed changes in the cetacean community (Shannon and Simpson indexes) in relation toannual and seasonal changes in sea surface temperature, water transparency and inferred and reportedfood availability. Six odontocete and six mysticete species were recorded during the study period. Dueto their high relative abundance and persistent presente, the long beak common (Delphinus capen&)and bottlenose (Tursiops truncatus) dolphins, as well as Brydes whales (Balaenoptera edeni) were,respectively, the most important odontocete and mysticete community members. The evidente indicatesthat sea surface temperature and water transparency, besides food availability, show predictableseasonal and annual changes related to the influente of tropical water masses and to large scaleoceanographic phenomena, such as El Nifio Southem Oscillation and La NiAa. Nevertheless, cetaceandiversity did not show consequent changes. The cetacean community was more diverse and stable atthe transition between seasonal and annuai oceanographic conditions. Cetacean diversity changed significantlyat smaller time and space scales, detined by the interaction of particular annual, seasonaland local conditions. This and changes in species richness, mediated by the temporal residence ofmigrating species of temperate waters or more sporadic tropical visitors, indicate the existence of fastand important changes in species abundance and substitution rates, associated with the behaviouralecology of the species and fluctuations in the ecosystems metabolism. 1996 artículo científico 0185-3880 https://www.redalyc.org/articulo.oa?id=48022202 en http://www.redalyc.org/revista.oa?id=480 Ciencias Marinas application/pdf Universidad Autónoma de Baja California Ciencias Marinas (México) Num.2 Vol.22