el Safi S H, Haridi A A, Rabaa F M
J Trop Med Hyg. 1985 Apr;88(2):169-74.
The food of both Gambusia affinis and Oreochromis niloticus was studied. Organisms eaten by both species of fish are tabulated, together with the amounts eaten during the various months of the year. G. affinis larger than 25 mm are carnivorous and become more so with age. Food selection by G. affinis depends on the availability of food items rather than choice. It showed a marked preference for mosquito larvae. O. niloticus smaller than 150 mm were markedly carnivorous, but this decreased with age. Only small fish of this species are useful for the biological control of mosquitoes. Fish larger than 150 mm showed a marked preference for higher aquatic macrophytes.
对食蚊鱼和尼罗罗非鱼的食物进行了研究。列出了这两种鱼类所食用的生物，以及它们在一年中各个月份的食量。体长超过25毫米的食蚊鱼为肉食性，且随着年龄增长，这种特性愈发明显。食蚊鱼的食物选择取决于食物的可获得性，而非选择偏好。它对蚊子幼虫表现出明显的偏好。体长小于150毫米的尼罗罗非鱼明显为肉食性，但随着年龄增长，这种特性会减弱。只有这种尼罗罗非鱼的小鱼对蚊子的生物防治有用。体长超过150毫米的尼罗罗非鱼对高等水生大型植物表现出明显的偏好。
