Effect of oxadiazon on Clarias Grariepinus: I incubation period and hatching success
Abstract
The effect of oxadiazon, (a herbicide applied in irrigated paddy fields and fadama) on incubation period and hatching success of Clarias gariepinus was investigated. At the concentration of 1800ug/I applied under field conditions, the incubation period was not significantly affected (p>0.05) while the number eggs hatched were significantly depressed (p<0.05). However, with longer exposure, the percent number of eggs hatched increased but not to the level observed in the control (water). This may be attributed to gradual removal of the active components of oxadiazon from the water column. The presence of oxadiazon at concentration applied in the field therefore poses a potential threat to the recruitment of C. gariepinus in areas where it is applied. Keywords: Clarias gariepinus. eggs. hatching success, incubation period, oxadiazon.[Niger Agric. J. 33 (2002): 136-138]
NAJ supports free online communication and exchange of knowledge as the most effective way of ensuring that the fruits of research and development practice are made widely available. It is therefore committed to open access, which, for authors, enables the widest possible dissemination of their findings and, for readers, increases their ability to discover pertinent information. The Journal adopts and uses the CC: BY license and is open access. This license lets others distribute, remix, adapt, and build upon your work, even commercially, as long as they credit you for the original creation. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the Journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work. Copyright for articles published in this Journal is retained by the Journal.
