Effect of commercial diets on female reproductive performance and offspring quality in the red cherry shrimpNeocaridina davidi(Caridea, Atyidae)

Abstract

The red cherry shrimp Neocaridina davidi is a popular freshwater ornamental species traded worldwide for aquarium keeping. Its aquaculture generally relies on commercially available feeds. This study evaluated the effect of three commercial diets (A, B and C) on its female reproductive performance and offspring quality. Relative realized fecundity and egg size did not differ among treatments. However, egg carotenoid content was 40% and 52% lower in eggs from brooders fed B and C, respectively, than in those from brooders fed A, which had the highest carotenoid content. This suggests that dietary carotenoids directly affected egg carotenoid content. They also appeared to influence embryo survival, as relative actual fecundity was 59% and 47% lower for B and C compared to A, although this difference was not statistically significant. Although juvenile I weight was similar for all diets, the amount of lipid droplets in the perigastric organ region in juveniles I from brooders fed B, was about 20% lower than in the others. Offspring survival to the food restriction test was similar for all diets. However, the weight of 32‐day‐old juveniles was lower when brooders were fed C which had the lowest n‐3 PUFAs content, but the highest content of linoleic acid.

Effect of different substrates on growth and biochemical composition of the ornamental “red cherry” caridean shrimp, Neocaridina davidi (Atyidae)

“…Previous studies have addressed several aspects of N . davidi's reproduction and growth (Marciano et al, 2018; Sganga et al, 2016; Tropea & López Greco, 2015, 2019; Tropea et al, 2015, 2019), early development (Pantaleão et al, 2015, 2017), the use of formulated diets to enhance growth and colour (Sganga & López Greco, 2020; Tomas et al, 2020), dietary supplementation with the algae Spirulina platensis (Namaei Kohal et al, 2018) and optimal density for maximum growth (Vazquez et al, 2017). Nonetheless, to our knowledge, no studies regarding the effect of vegetal cover on this species culture have been conducted.…”