Towards the conservation of a critically endangered species, Aphanius farsicus: embryogenesis and development

  • Nafiseh Sanjarani Vahed
  • Hamid Reza Esmaeili
  • Mojtaba Masoudi
  • Mehregan Ebrahimi
Article

Abstract

Human-induced disturbance or anthropogenic activities, natural disturbance and also limited distribution, have forced Aphanius farsicus populations to the edge of extinction, during the past few years. As knowledge of fish ontogeny is fundamental for accurate stock assessment, and reproductive potential determination, thus for future conservation and management of the critically endangered species, we describe the first detailed normal embryonic development of this cyprinodontid fish from fertilization to post-hatching. Aphanius farsicus spontaneously spawned at 24°C. The newly-laid eggs were hyaline and spherical in shape (1.40 ± 0.02 mm, n = 11), sticky and full of egg yolk (telolecithal/macrolecithal) with oil droplets. We documented the main developmental stages at 24°C to zygote (0 h), cleavage (2 h), blastula (2 h), gastrula (17 h), segmentation, (34 h), pharyngula (100 h) and hatching (162 h).

Keywords

Cyprinodontid fishes Embryogenesis Staging Organogenesis 

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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  1. 1.Department of Biology, Developmental Biosystematics Research Laboratory, Zoology Section, College of SciencesShiraz UniversityShirazIran
  2. 2.Department of Earth and Environmental Sciences, Palaeontology & GeobiologyMunichGermany

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