Effect of Photoperiod on Growth and Reproduction of Cyclops varicans G. O. Sars, 1863 (Cyclopioda – Copepoda )

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Maysaloon L. Al-Doori
Nibrass L. Al-Doori

Abstract

 The species Cyclops varicans G.O.Sars (Which was recorded for the first time in Iraq ) was chossen to study the effect of photoperiods on the species reproduction growth . The chossen photoperiods were 0:24 , 12: 12 , and 24 : 0  L.D.  The data showed obvious statistical effect of photoperiods specially  24 : 0   L.D. on the mean of clutch size ,  produced eggs , no. of nauplei  , transformation time of  nauplius I to copepodid I and transformation time of copepodid I to adult stage . The data also showed uneven effects of photoperiods on the number and maturation period of both males and females . Temperature , transparency , PH , and electrical conductivity also have been studied for the adoption as ideal condition in the laboratory for the growth and reproduce of this species . 

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How to Cite
Effect of Photoperiod on Growth and Reproduction of Cyclops varicans G. O. Sars, 1863 (Cyclopioda – Copepoda ). (2017). Ibn AL-Haitham Journal For Pure and Applied Sciences, 27(2), 51-59. https://jih.uobaghdad.edu.iq/index.php/j/article/view/327
Section
Biology

How to Cite

Effect of Photoperiod on Growth and Reproduction of Cyclops varicans G. O. Sars, 1863 (Cyclopioda – Copepoda ). (2017). Ibn AL-Haitham Journal For Pure and Applied Sciences, 27(2), 51-59. https://jih.uobaghdad.edu.iq/index.php/j/article/view/327