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Asian Journal of Biological Sciences
  Year: 2012 | Volume: 5 | Issue: 8 | Page No.: 425-431
DOI: 10.3923/ajbs.2012.425.431
 
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Captive Spawning of Holothuria arenicola (Semper, 1868) from Egyptian Mediterranean Coast

F.A. Abdel Razek, S.H. Abdel Rahman, R.M. Moussa, M.H. Mena and M.M. El-Gamal

Abstract:
In Egypt, Holothuria arenicola is distributed along the Alexandrian Mediterranean coast. Its natural stock has decreased significantly, having been over fished in the last years. This study provides an overview of different spawning induction methods for mature H. arenicola. Thermal stress through elevating the water temperature by 5°C is effective more than 8°C. The current attempts demonstrated that good spawning rate can be achieved by injection of Perivisceral Coelomic Fluid (PCF) even in specimens collected before the spawning season (by month) and held for 45 days before inducing experiment. Using stripping method, proved that this method mostly effective specially within the active spawning months June and July with a high rate of fertilization. Chemical stimulation by injecting 3 mL of 10% MgCl2 or 3 mL of 5% CaCl2 induced spawning but in small numbers. No induction was noticed with applying drying or addition of diatoms and micro algae methods. Injection with PCF in H. arenicola is recommended due to its efficient and quick response of egg release as well as its positive response with samples collected and remained in the hatchery for a time before spawning.
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How to cite this article:

F.A. Abdel Razek, S.H. Abdel Rahman, R.M. Moussa, M.H. Mena and M.M. El-Gamal, 2012. Captive Spawning of Holothuria arenicola (Semper, 1868) from Egyptian Mediterranean Coast. Asian Journal of Biological Sciences, 5: 425-431.

DOI: 10.3923/ajbs.2012.425.431

URL: https://scialert.net/abstract/?doi=ajbs.2012.425.431

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