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Effects of live feed containing Panagrellus redivivus and water depth on growth of Betta splendens larvae
Author(s) -
Couto Márcia Valéria Silva do,
Sousa Natalino da Costa,
Abe Higo Andrade,
Dias Joel Artur Rodrigues,
Meneses Juliana Oliveira,
Paixão Peterson Emmanuel Guimarães,
Cunha Fernanda dos Santos,
Ramos Fabrício Menezes,
Maria Alexandre Nizio,
Carneiro Paulo Cesar Falanghe,
Fujimoto Rodrigo Yudi
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13727
Subject(s) - biology , zoology , fishery , fish <actinopterygii> , larva , nematode , feed conversion ratio , aquaculture , ecology , body weight , endocrinology
Panagrellus redivivus is a nematode with a high protein content and low‐cost production. It is successfully used in the larviculture of shrimp, however, it has not yet been evaluated as feed for Betta splendens larvae. Thus, the objective of this study was to evaluate P. redivivus as feed for betta larvae maintained at different depths of water. The experiment was based on a completely randomized 3 × 2 factorial design, represented by two feed types and one alternating feeding regime plus two water depths (2.5 and 5.0 cm). The Artemia feed promoted the highest weight gain, followed by the alternating feeding regime. The single use of the nematode as live feed produced the poorest weight gain. The water depth and the feeding method influenced the specific growth rate ( SGR ). At a depth of 2.5 cm, the alternating feeding promoted similar SGR compared to fish fed with Artemia only. Furthermore, at the greater water depth an improvement in SGR was observed in fish fed Artemia only, but the similarity to alternating feeding regime remains. Thus, the inclusion of nematode is an appropriate and lower cost feed strategy for the betta larviculture independent of water depths.