Comparison of growth and reproduction performance of broodstock Pacific white shrimp Litopenaeus vannamei reared in oceanic and brackish water

Abstract

This study provides a preliminary evaluation of feasibility of brackish water breeding. Shrimps were initially cultured at brackish water. Shrimps were reared at different stages (5, 6, 7 and 8 months, respectively), and 300 female shrimps were selected from each stage for growth at an enhanced salinity of 30 ppt. When the shrimps were sexually mature, the reproductive characteristics (mating rate, egg number and nauplii number) of the broodstock shrimps, quality of nauplii (malformation rate of nauplii) and quality of postlarvae (survival rate and desalination stress) were tested to evaluate of the effects of brackish water (10 ppt) on these shrimps. Oceanic water (30 ppt) for rearing shrimps was used as control group. Histopathological analysis of gonads and hepatopancreases from oceanic and brackish water shrimp was performed. The results showed that shrimps cultured for a maximum of 8 months in brackish water remained sexually mature. There were no significant differences regarding the quality of shrimps in the oceanic water and brackish water. However, the brackish water cultured shrimps were easily adapted to salinity changes. Our results demonstrate the good feasibility of the present scheme, in which the broodstock shrimps were cultured at a salinity of 10 ppt.

Genetic parameters associated with growth and multiple-stress traits in Litopenaeus vannamei according to age

“…In this study, the heritability estimates (Cardellino and Rovira 1987) of growth traits at different ages were 0.256 ± 0.119 to 0.441 ± 0.124. The results are consistent with heritability estimates in prior studies (Hernandez-Ruiz et al 2020;Perez-Rostro and Ibarra 2003;Sui et al 2016) and our previous studies (Yuan et al 2018;Zhang et al 2017a, b) but lower than those reported by others (Andriantahina et al 2012;Ren et al 2020;Tan et al 2019). The difference might be caused by genetic or environmental factors, such as use of different populations, growth conditions, ages, sexes, and models (Elvingson and Johansson 1993;Korkeila et al 1991;Lu et al 2016;Montaldo et al 2013;Zhang et al 2017a).…”

Attitudes, Perceptions, and On-Farm Self-Reported Practices of Shrimp Farmers’ towards Adoption of Good Aquaculture Practices (GAP) in Thailand

“…Moreover, all farmers agreed with the concept of maintaining appropriate stocking density of shrimp larvae, since this can impact upon shrimp quality. Consistent with previous studies, it was understood that rearing shrimp at high stocking densities can increase waste accumulation and causes low shrimp growth [33]. However, there were no statistical differences in farm management practices among groups of adopters when assessed by F-test.…”