Effects of salinity on growth and development of Copepod Apocyclops panamensis
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Keywords

Apocyclops panamensis
độ mặn
sinh trưởng và phát triển Apocyclops panamensis
salinity
growth and development

Abstract

This study determines the effect of salinity on (1) growth and development; (2) body size;                               (3) egg-carrying rate; (4) life cycle stages of copepod Apocyclops panamensis isolated from an intensive white shrimp (Lipopenaeus vannamei) pond. The experiment was conducted in a completely randomized design with three replicates in 250 mL flasks with three salinity treatments (10, 20, 30‰). The copepod life cycle was determined by raising ten egg-carrying adult copepods in ten flasks of 5 mL cell culture plates (ten replicates). The results show that the growth and development rate, body size and egg-carrying rate of copepod depend on salinity. The 20‰ salinity provides better results than 10 and 30‰ (p < 0.05). The total development time of the nauplius stage is about 2–3 days, copepodite lasts 9–14 days, and the egg-carrying lasts about 2–3 days. The fecundity of Apocyclops panamensis is 5,5 ± 1,05 eggs/female/day, and the reproductive span is 34,01 ± 5,77 h.

https://doi.org/10.26459/hueunijard.v131i3A.6403
PDF (Vietnamese)

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