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Abstract

    Three experiments were conducted to determine the effects of temperatures (25, 30 and 34ºC) on growth, survival, fecundity, hatching success, reproductive ability, and life span of the copepod Pseudodiaptomus annandalei. In the first experiment, newly hatched nauplii F1 were cultured in 5-L glass bottles (salinity of 20 g/L), daily sampled 300 ml to determine the size and composition of different development stages. In the second experiment, 500 newly hatched nauplii F1 were cultured in 1-L plastic cups (4 cups per temperature treatment) until maturity. The survival, fecundity, hatching success and nauplii/copepod were determined. In the third experiment, 50 males and 50 females from the second experiment were cultured for each temperature treatment (5 experimental units of 10 males and 10 females each), nauplii production were observed for 10 days, death males and death females were also recorded daily until all copepods died to determine the life span. Results indicate water temperature affects survival, growth, reproduction and life span of copepod P.annandalei. Therefore, the temperature 30ºC is optimal temperature for culturing copepod Pseudodiaptomus annandalei.


Keywords: temperature, Pseudodiaptomus annandalei, growth, reproduction, survival.

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Author Biographies

Đoàn Xuân Nam

Viện Nuôi trồng Thủy sản, Trường Đại học Nha Trang

Bùi Văn Cảnh

Viện Nuôi trồng Thủy sản, Trường Đại học Nha Trang

Phạm Quốc Hùng

Viện Nuôi trồng Thủy sản, Trường Đại học Nha Trang

Đinh Văn Khương

Viện Nuôi trồng Thủy sản, Trường Đại học Nha Trang