Effects of salinity on growth and development of copepod Apocyclops panamensis

Keywords

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

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 5-mL cell culture plates (ten replicates). The results show that the growth and development rate, body size, and egg-carrying rate of Copepoda 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 and 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

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