Reading: Effect of glyphosate-based herbicide, Roundup™ on territory deference of male Oreochromis mo...

Download

A- A+
dyslexia friendly

Articles

Effect of glyphosate-based herbicide, Roundup™ on territory deference of male Oreochromis mossambicus (Osteichthyes, Cichlidae) associated with mating behaviour

Authors:

KV Sandun ,

Department of Zoology and Environmental Management, University of Kelaniya, Kelaniya, LK
X close

N Bandara,

Department of Zoology and Environmental Management, University of Kelaniya, Kelaniya, LK
X close

Upali S Amarasinghe

Department of Zoology and Environmental Management, University of Kelaniya, Kelaniya, LK
X close

Abstract

African cichlids are important constituent species in tropical inland fisheries and Oreochromis mossambicus supports profitable fisheries in many countries of the world. This species exhibits elaborate courtship behaviour. Building of spawning nests by males, aggressive behaviour and breeding colouration are important behavioural patterns of this species associated with reproduction. As O. mossambicus is found in reservoirs of Sri Lanka which are situated in agricultural areas of the country, reservoir populations of this species are vulnerable to exposure to agrochemicals at least at sub lethal levels. As ‘Roundup™’ is one of the widely used herbicides in the agricultural areas of the country, the present study was undertaken to investigate its impacts on territorial behaviour of O. mossambicus.

Adult O. mossambicus collected from the wild was acclimatized to laboratory condition and exposed to sub-lethal glyphosate concentrations (0 ppm, 5 ppm, 8 ppm and 10 ppm). The territorial behaviour of males measured as intensity of colour change, chasing distance, chasing occurrence, area of territory maintained by nest builders, dorsal fin erection and status of the bites has altered significantly in the aquaria with all three concentration of herbicide.

Sri Lanka J. Aquat. Sci. 20 (1) (2015): 1-10

How to Cite: Sandun, K., Bandara, N. & Amarasinghe, U.S., (2015). Effect of glyphosate-based herbicide, Roundup™ on territory deference of male Oreochromis mossambicus (Osteichthyes, Cichlidae) associated with mating behaviour. Sri Lanka Journal of Aquatic Sciences. 20(1), pp.1–10. DOI: http://doi.org/10.4038/sljas.v20i1.7451
Published on 25 Mar 2015.
Peer Reviewed

Downloads

  • PDF (EN)

    comments powered by Disqus