Author(s): Dou, J (Dou, Juan); Zhang, GL (Zhang, Gaoli); Shi, C (Shi, Ce); Song, CB (Song, Changbin); Mu, CK (Mu, Changkao); Ye, YF (Ye, Yangfang); Wang, CL (Wang, Chunlin)

Source: AQUACULTURAL ENGINEERING Volume: 93 Article Number: 102158 DOI: 10.1016/j.aquaeng.2021.102158 Published: MAY 2021

Abstract: In this study, a 25-day experiment was performed to evaluate the survival and development of Portunus trituberculatus larvae under different light intensities (0, 61.55, 93.57, 124.31, 195.31, 248.51, and 310.95 ?mol m-2 s-1). The newly hatched larvae were cultured in 1-L beakers at a density of 100 individuals/L, with four replicates per treatment. Full-spectrum light-emitting diode (LED) strip lamps were used as the light source. The larvae were fed with Artemia nauplii until all the larvae metamorphosed to young crabs or died, and survival and development of the larvae were recorded. The results showed that P. trituberculatus zoeae were not able to complete the entire larval cycle in the absence of light. In the dark treatment, the survival rate of the larvae decreased sharply in Z3 and reached 0.8 % in Z4, and all the larvae failed to develop to the megalopa stage. In the light treatment, no significant differences were observed in the survival rates of the Z1, Z2, and Z3 larvae under different light intensities (P 0.05), no significant differences were found among the treatments at the end of the experiment (P 0.05). In conclusion, the results show that P. trituberculatus needs more lighting than other crab species, and the light requirement declines as the zoeal and megalopal larvae develop into young crabs.

Accession Number: WOS:000641326200005

ISSN: 0144-8609

eISSN: 1873-5614

Full Text: https://www.sciencedirect.com/science/article/pii/S0144860921000145?via%3Dihub