Combined effect of temperature and salinity on hatching characteristics of three fairy shrimp species (Crustacea: Anostraca)

  • Behroz Atashbar | Atashbarb@gmail.com Ghent University Urmia University, Iran, Islamic Republic of.
  • Naser Agh Urmia University, Iran, Islamic Republic of.
  • Gilbert Stappen Ghent University, Belgium.
  • Johan Mertens Ghent University, Belgium.
  • Lynda Beladjal Ghent University, Belgium.

Abstract

The combined effects of temperature and salinity on hatching characteristics of three anostracan species, Phallocryptus spinosa, Branchinecta orientalis and Streptocephalus torvicornis from East and West Azerbaijan, Iran, were studied. The cysts were kept for 10 days at seven different temperatures (12, 15, 18, 21, 24, 27 and 30°C) and four salinity conditions (0, 5, 10, and 15 gL-1), and the effects of the resulting 28 experimental conditions on hatching patterns (duration of pre-hatching period, hatching percentage at first day of hatching, cumulative hatching success) were examined. Results were tested by ANOVA and multiple regression was applied to generate contour models by polynomial equation. The hatching characteristics in all species were significantly affected by temperature and salinity. P. spinosa, B. orientalis and S. torvicornis cysts hatched optimally at temperatures 18-26ºC, 19-23ºC and 15-18ºC, respectively, within the same salinity range of 0-2 gL-1. The highest cumulative hatching success among the species was observed in P. spinosa at the combination of 27°C and 0 gL-1 (89.61%). No hatching was observed for eggs of S. torvicornis and B. orientalis incubated at lower (<15ºC) and higher (>27ºC) temperature, respectively. The pre-hatching period was prolonged as both salinity and temperature increased and was highest in P. spinosa (7.7 days at 12°C and 15 gL-1 salinity). High hatching success was observed over wide ranges of temperature and salinity in P. spinosa eggs which demonstrates one of the possible mechanisms responsible for the cosmopolitan distribution of this species.

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Author Biographies

Behroz Atashbar, Ghent University Urmia University
Department of Biology, Faculty of Science - Department of Biology and Aquaculture, Artemia and Aquatic Animals Research Institute
Naser Agh, Urmia University
Department of Biology and Aquaculture, Artemia and Aquatic Animals Research Institute
Gilbert Stappen, Ghent University
Laboratory of Aquaculture & Artemia Reference Center,
Johan Mertens, Ghent University
Department of Biology, Faculty of Science
Lynda Beladjal, Ghent University
Department of Biology, Faculty of Science
Published
2014-05-26
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Original Articles
Keywords:
Anostraca, Phallocryptus spinosa, Branchinecta orientalis, Streptocephalus torvicornis, cumulative hatch.
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How to Cite
1.
Atashbar B, Agh N, Stappen G, Mertens J, Beladjal L. Combined effect of temperature and salinity on hatching characteristics of three fairy shrimp species (Crustacea: Anostraca). J Limnol [Internet]. 2014May26 [cited 2021May6];73(3). Available from: https://jlimnol.it/index.php/jlimnol/article/view/jlimnol.2014.954