The effect of food, light intensity and tank volume on resting eggs production in Daphnia carinata.

Autor: Dinh, Hoang Dang Khoa1 dhdangkhoa.ier@gmail.com, Tran, Thi Hong Nhung1 trannhungmk@gmail.com, Lu, Tuyet Linh1 lutuyetlinh@gmail.com, Nghiep, Thi Hong1 nghiepthihong93@gmail.com, Le, Phi Nga2 lephinga@hcmut.edu.vn, Do, Hong Lan Chi1 dhlchi@vnuhcm.edu.vn
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Zdroj: Journal of Environmental Management. Jul2018, Vol. 217, p226-230. 5p.
Abstrakt: Sexual reproduction is an important stage of cyclical parthenogenesis Daphnia , these cyclic parthenogens need to time their shift from asexual to sexual reproduction correctly, based on environmental cues. We investigated the effect of food quality and quantity, light intensity, and culture tank volume on the resting eggs production of a tropical Daphnia carinata clone of Vietnam. The results showed that sexual ephippia production of the D. carinata was strongly induced when fed with green algae Scenedesmus sp., under moderate light intensity condition. The experiments also showed that food limitation is not an obligate requirement of shifting from parthenogenetic reproduction to sexual ephippia reproduction in D. carinata. Beside of that, culture volume seemed to be an important determinant of successfully forming of embryos inside ephippium. These findings here were from cultures in contaminant free condition, thus they are important basics for further studies of additional effects of environment toxicants on D. carinata species of Vietnam. [ABSTRACT FROM AUTHOR]
Databáze: GreenFILE
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