Biometry of cysts and nauplii of Artemia urmiana and Artemia partenogenetica from Urmia Lake regionBiometry of cysts and nauplii of Artemia urmiana and Artemia partenogenetica from Urmia Lake region

Biometry of cysts and nauplii of Artemia urmiana and Artemia partenogenetica from Urmia Lake region

Behrooz Atashbar¹, Alireza Asem², Ramin Manaffar¹, Naser Agh¹

1. Artemia and Aquatic Animals Research Center, Urmia University, Urmia, IRAN
2. Department of Biology, Faculty of Science, Razi University, Kermanshah, IRAN

Summary:
Morphological differences are widely used for isolation of Anostraca crustacean populations. It is well understood that in Artemia morphological traits have been the basis to describe populations and species. The purpose of the present study was morphological characterization of different Artemia populations from Iran. The biometrical parameters such as diameters of untreated and decapsulated cysts, chorion thickness and length of newly hatched nauplii from Urmia Lake (Artemia urmiana, Artemia partenogenetica) and lagoons around Urmia Lake (Rashakan) were investigated. Cysts of 3 Populations were hatched at standard lab condition. Newly hatched nauplii were cultured in 80 ppt water. The adult Artemia were then transferred to 50 ml. falcon tubes and reproductive characteristics were recorded. Cysts produced by the adult females were collected and the diameter of untreated and decapsulated cysts and the length of nauplii hatched from these cysts were measured. Tukey Test was used for data analyze and partition of samples. The diameters of untreated and decapsulated cysts, diameter of chorion, size of nauplii were used in Hierarchical Cluster Analysis (Fig. 1).

Fig.1 – Partitioning of samples by Hierarchical Cluster Analysis

*Artemia partenogenetica

The analysis clearly shows that Artemia partenogenetica (Lagoon) related to one collection and can be isolated from Artemia partenogenetica (Lake) and Artemia urmiana that grouped in other cluster.

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