Resumen

NAVARRETE-SALGADO, N. A.; CEDILLO-DIAZ, B. E.; CONTRERAS-RIVERO, G.  y  ELIAS-FERNANDEZ, G.. GROWTH, REPRODUCTION AND SURVIVORSHIP OF Girardinichthys multiradiatus (PISCES, GOODEIDAE) IN SAN MIGUEL ARCO RESERVOIR, STATE OF MEXICO. Rev. Chapingo ser. cienc. for. ambient [online]. 2007, vol.13, n.1, pp.15-21. ISSN 2007-4018.

This work considers the growth, reproduction and survivorship of Girardinichthys multiradiatus in San Miguel Arco reservoir State of Mexico from December 2004 to October 2005. Three sampling stations were settled in the littoral part of the reservoir and in each one were considered some enviromental parameters of physical and chemical type as depth, transparency, temperature, oxygen, pH, conductivity, hardness and alkalinity what presented moderate fluctuations along the period of study. The fishes were captured with a dragnet. Were recorded four size classes. Of the 627 specimens, 236 were females and 327 males. The highest average length was recorded in Spring (5.8 cm) and the lowest in Summer (2.25 cm). The length was highest in Spring (7.27 cm) and lowest in Summer (4.64 cm). The growth in length was highest in Spring (- 0.057) and lowest in Summer (- 0.1928). The growth in weight was highest in Winter (5.009) and lowest in Summer (1.6444). The condition factor was highest in Spring (0.074) and lowest in Winter (0.011). The minimum size of reproduction was presented in a female of 2.3 cm in Spring and in a male of 1.7 cm in Autumn. The highest number of embryos was of 87 in a female of 4.65 cm. The major survival was recorded in Winter (16 %) and the least in Spring (0.2 %). Is conclude that the recorded biological rates are influenced by the prevalent physical enviroment in which inhabits this species.

Palabras llave : fishes; endemic species; Doradilla; Yellow fish.