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Protective effect of Terminalia catappa leaf extracts against Saprolegniosis on angelfish eggs.
- Source :
- Aquaculture Research; Feb2022, Vol. 53 Issue 2, p377-387, 11p
- Publication Year :
- 2022
-
Abstract
- The Saprolegniosis causes major reduction egg hatching rate by angelfish (Pterophyllum scalare); therefore, we investigated the effectiveness of two Terminalia catappa extracts (27 ℃ and 80 ℃) against S. parasitica on fish eggs. Mycelium growth was evaluated in vitro at 0, 2.5, 5.0 and 10 g/L for 96 h, in solid and liquid medium culture. In an in vivo assay, we tested lower concentrations of hot extract (25, 50 and 100 mg/L) to prevent infection by zoospores. The hot aqueous extract was the most effective, and the concentrations of 5 and 10 g/L demonstrated great efficiency in liquid medium. In vivo conditions, 50 and 100 mg/L of hot extract provided more viable eggs, greater percentage of total larvae and lower percentage of infected eggs. Thus, the hot extract should be used instead of the room‐temperature extract as a prophylactic measure, to prevent saprolegniosis in P. scalare eggs and improving the hatching rate. [ABSTRACT FROM AUTHOR]
- Subjects :
- FISH eggs
TERMINALIA
EGGS
EXTRACTS
PARASITIC wasps
Subjects
Details
- Language :
- English
- ISSN :
- 1355557X
- Volume :
- 53
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Aquaculture Research
- Publication Type :
- Academic Journal
- Accession number :
- 154497263
- Full Text :
- https://doi.org/10.1111/are.15579