WHAT FACTORS INFLUENCE BODY SIZE VARIATIONS AND EGG PRODUCTION OF COPEPODS AND ARTEMIA IN THE SALTERN OF SFAX?

CHIRAZ LADHAR, FRANÇOISE DENIS, HABIB AYADI

Dr Tamara Milivojevic(milivojevictamara@gmail.com)

Catarina Cruzeiro(catarinarcruzeiro@hotmail.com)

Fabio D Agostino(fabio.dagostino@iamc.cnr.it)

Chiraz Ladhar, WHAT FACTORS INFLUENCE BODY SIZE VARIATIONS AND EGG PRODUCTION OF COPEPODS AND ARTEMIA IN THE SALTERN OF SFAX?(2016)SDRP Journal of Cellular and Molecular Physiology 1(1)p:8-14

The effect of salinity, temperature, nitrate, phosphate, and chlorophyll a concentration were evaluated on the body length and egg production of copepods (Oithona nana, Oithona similis, Paracartia grani and Mesochra lilljeborgi) and Artemia salina. Sampling was conducted in four ponds of increasing salinity in solar saltern of Sfax (Tunisia) between June 2010 and May 2011. The results of the present study showed that, among the parameters considered, salinity was the major factor influencing the body length (R2 = 0.8007) and egg production (R2 = 0.8077) of studied species. Female species were longer than male species and body size decreases as salinity increases. The results suggest that biometric and egg production of zooplankton seemed to be related to the salinity, to the nitrate concentration and chiefly to alimentation.

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