CHARACTERIZATION OF PERUVIAN
ARTEMIA SPP. STRAINS
G. Alvarez, V.H. Vera
Abstract:
The goal of this study was to characterize the Peruvian strains of brine shrimp from Virrilá-Piura-Perú. 05°02’LS-81°03’LW (C1), Chilca-Lima- Peru 12°31'LS-76°43'LW (C2), and Los Chimus-Ancash-Peru 09°20'LS-78°28'LW (C4), which were compared with GSL, Utah-USA 41°00'LN-112°20'LW (C3) strain (Artemia franciscana). The parameters analyzed in this study were cyst diameter (DQSD, DQD), instar-I nauplii total length (L), growth rate, nine adult morphometric parameters, and modal mitotic chromosomes. The experiments were carried out at standard conditions (25°C and 35%o). The analysis of variance (ANOVA) (P< 0.05) and Duncan test showed statistical differences for cyst, nauplii and adult parameters among C1, C2, C3 and C4 strains except for eyes distance (DOC). C l showed the smallest cyst diameter and L. An exponential regression model (Lt= ec1-c2/t) used, determined the best growth rate to be Virrila strain (r2= Cl 0,94; C2 0,91; C3 0,905; C4 0.80). The modal mitotic chromosome number were 2n = 42 for C 1, C2 and C3 strains. The adult morphometric parameters, DQSD, DQD and L for C1, C2, C3 and C4 strains suggested that there was a distance between C2, C3, C1 and C4 strains. All those results showed that the Virrila, Chilca and Chimus strains are different for all the parameters estimated, except for the modal chromosome number. It is concluded that the most distant strain from GSL (A. franciscana) is Virrilá strain.
(Fondo
Nacional de Desarrollo Pesquero - FONDEPES Peru, e-mail: fondepes@terra.com.pe)