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Ecobiological survey of the brine shrimp Artemia salina from Sabkhet El Adhibet (south-east Tunisia)

Published online by Cambridge University Press:  02 June 2009

Hachem Ben Naceur ,
Amel Ben Rejeb Jenhani  and
Mohamed Salah Romdhane
Hachem Ben Naceur*
Affiliation:
Research Unit Aquatics Ecosystems Resources, National Institute of Agricultural Sciences of Tunisia, University 7th November at Carthage, 43 Avenue Charles Nicolle 1082 Tunis Mahrajène, Tunisia
Amel Ben Rejeb Jenhani
Affiliation:
Research Unit Aquatics Ecosystems Resources, National Institute of Agricultural Sciences of Tunisia, University 7th November at Carthage, 43 Avenue Charles Nicolle 1082 Tunis Mahrajène, Tunisia
Mohamed Salah Romdhane
Affiliation:
Research Unit Aquatics Ecosystems Resources, National Institute of Agricultural Sciences of Tunisia, University 7th November at Carthage, 43 Avenue Charles Nicolle 1082 Tunis Mahrajène, Tunisia
*
Correspondence should be addressed to: H. Ben Naceur, Unité de Recherche Ecosystèmes et Ressources Aquatiques, Institut National Agronomique de Tunisie, 43 Avenue Charles Nicolle, 1082 Tunis Mahrajène, Tunisia email: [email protected]
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Abstract

In order to provide a better characterization and understanding of the brine shrimp Artemia salina life-cycle, different ecological and biological parameters were taken out monthly during two periods from November 2005 to April 2006 and from November 2006 to April 2007 in Sabkhet El Adhibet (south-east Tunisia). Variation of water temperature, salinity, pH, dissolved oxygen, nutrients (orthophosphate, nitrites, nitrates and ammonium) and phytoplankton density were monitored. The Artemia population was also surveyed. Artemia were present in the site with salinity between 32.2 and 281.7 g l−1 and water temperature between 12.1 and 25.4°C. The pH ranged from 7.6 to 9 and dissolved oxygen concentration from 3.4 to 17.5 mg l−1. Minimum and maximum values of phytoplankton density were 0.19 and 14.59 106 cell l−1. In addition, the nutrient analysis registered showed that nitrate and ammonium represent the major nutrient. The Artemia population density fluctuated between 0.22 and 38.57 individuals per litre. The male:female ratio was dominated by the males. Artemia from Sabkhet El Adhibet showed variability in fecundity (total offspring and brood size) as well as in the ratio encystment/oviviparity. The individual fecundity fluctuates between 29.4 and 70.2 cysts and 17.8 and 69.8 nauplii. Finally, the influence of physical and chemical parameters as well as phytoplankton density over the Artemia population was noticed.

Keywords

ArtemiabioecologySabkhet El AdhibetTunisia
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 89 , Issue 6 , September 2009 , pp. 1109 - 1116
Copyright
Copyright © Marine Biological Association of the United Kingdom 2009

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