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Hatching of the eggs of Eulimnadia colombiensis (Branchiopoda) at different temperatures and regime of light

Abstract

Clam shrimps are small crustaceans typical of temporary ponds. To survive in these highly variable and unpredictable environments, they produce resistant eggs. These settle on the bottom of pools where they remain dormant, forming a cyst bank. We investigated the effects of light and temperature, both of which break the dormancy of Eulimnadia colombiensis eggs. Dormancy was not broken below 25°C, irrespective of the effect of light. Hatching was highest (27.8% of eggs) at 30°C in continuous light. Light also influenced the development of eggs, and some nauplii hatched spontaneously without drought stress. Methods are suggested for the cultivation of this species in tropical areas.

Clam shrimps; dormancy; egg production; environmental influence


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Publication Dates

  • Publication in this collection
    28 Jan 2015
  • Date of issue
    Dec 2014

History

  • Accepted
    19 Dec 2014
  • Received
    17 Sept 2014
Sociedade Brasileira de Carcinologia Instituto de Biociências, UNESP, Campus Botucatu, Rua Professor Doutor Antônio Celso Wagner Zanin, 250 , Botucatu, SP, 18618-689 - Botucatu - SP - Brazil
E-mail: editor.nauplius@gmail.com