Duração da larvicultura sobre o desempenho posterior de juvenis de jundiá, Rhamdia quelen, recriados em tanques-rede

Development, nutrition, and rearing practices of relevant catfish species (Siluriformes) at early stages

“…Concerning the duration of the period of intensive rearing before their transfer to ponds, Agüero et al 150 recommend rearing larvae indoors up to 8–10 dph (4.8 mg BW) (rearing conditions: 25.9°C; 25 larvae L −1 ; feeding larvae four times a day with an experimental dry diet) rather than directly stocking them at the onset of exogenous feeding at 2 dph or older ages (5 or 15 dph; 1.68 and 15.29 mg BW, respectively). Santinón et al 151 recommend transferring early juveniles to cages at 10 dph to reduce feeding and operating costs. The authors verified that fish performed similarly after 65 days in net cages when transferring indoor reared larvae fed different experimental dry diets (35% fish roe, fish silage or raw chicken liver) to outdoor net cages at the age of 10 dph (11.3–26.7 mg BW) or 15 dph (23.5–115.1 mg BW, depending on the diet tested).…”

“…The authors verified that fish performed similarly after 65 days in net cages when transferring indoor reared larvae fed different experimental dry diets (35% fish roe, fish silage or raw chicken liver) to outdoor net cages at the age of 10 dph (11.3–26.7 mg BW) or 15 dph (23.5–115.1 mg BW, depending on the diet tested). Moreover, the longer the period of indoor intensive culture, the higher the risks associated with the appearance of pathologies or skeletal deformities 150,151 . These results might be attributed to a lack of standardised rearing protocols and knowledge gaps on larval nutritional requirements in this species 152 …”

“…Moreover, the longer the period of indoor intensive culture, the higher the risks associated with the appearance of pathologies or skeletal deformities. 150,151 These results might be attributed to a lack of standardised rearing protocols and knowledge gaps on larval nutritional requirements in this species. 152 In ponds, stocking density can reach 200 specimens m −2 , although this value should be adjusted according to the food availability and the need for food supplementation.…”