alexa The Neotropical Genus Austrolebias: An Emerging Model of Annual Killifishes
ISSN: 2168-9296

Cell & Developmental Biology
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Review Article

The Neotropical Genus Austrolebias: An Emerging Model of Annual Killifishes

Nibia Berois1, Maria J. Arezo1 and Rafael O. De Sa2*
1 Departamento de Biologia Celular y Molecular, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
2 Department of Biology, University of Richmond, Richmond, Virginia, USA
*Corresponding Author : Rafael O. De Sa
Department of Biology
University of Richmond, Richmond
Virginia, USA
Tel: 804-2898542
Fax: 804-289-8233
E-mail: [email protected]u
Received April 17, 2014; Accepted May 24, 2014; Published May 27, 2014
Citation: Berois N, Arezo MJ, De Sa RO (2014) The Neotropical Genus Austrolebias: An Emerging Model of Annual Killifishes. Cell Dev Biol 3:136. doi:10.4172/2168-9296.1000136
Copyright: © 2014 Rafael O De Sa, 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

Annual fishes are found in both Africa and South America occupying ephemeral ponds that dried seasonally. Neotropical annual fishes are members of the family Rivulidae that consist of both annual and non-annual fishes. Annual species are characterized by a prolonged embryonic development and a relatively short adult life. Males and females show striking sexual dimorphisms, complex courtship, and mating behaviors. The prolonged embryonic stage has several traits including embryos that are resistant to desiccation and undergo up to three reversible developmental arrests until hatching. These unique developmental adaptations are closely related to the annual fish life cycle and are the key to the survival of the species. Most of the available data on Neotropical annual fishes derive from studies on the genus Austrolebias. Herein, we review and summarize the available data on the evolution, reproduction strategy, developmental biology and conservation status of these Neotropical fishes.

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