EFFECT OF TYPE AND CONCENTRATION OF ALGAL FOOD (CHLORELLA VULGARIS AND SCENEDESMUS ACUTUS) ON THE POPULATION DYNAMICS OF DAPHNIA AMBIGUA SCOURFIELD, 1947 (CLADOCERA, DAPHNIIDAE)
Por:
Sarma, SSS, Tavera-Briseno, K, Nandini, S
Publicada:
1 ene 2009
Categoría:
Aquatic Science
Resumen:
We quantified changes in the population abundance of Daphnia ambigua, separately cultured on Chlorella vulgaris or Scenedesmus acutus, respectively, at three different algal concentrations (dry weight, 1.45, 4.35, and 13.05 mu g ml(-1)). These population growth experiments were carried out for 30 days under laboratory conditions, with the medium and the algal food (at the initial density) renewed daily. Our study showed that a population of D. ambigua grew well on either Chlorella vulgaris or Scenedesmus acutus, when offered as an exclusive diet. Regardless of the algal type, increased algal density generally resulted in an increased population abundance of D. ambigua. The peak population abundance of D. ambigua was approximately 6 ind.ml(-1) on Chlorella, at a concentration of 4.35 mu g ml(-1). The rate of population increase of D. ambigua varied from 0.123 +/- 0.012 to 0.224 +/- 0.006 per day, depending on the algal species and its concentration. Daily population growth rates of D. a
Filiaciones:
Sarma, SSS:
Univ Nacl Autonoma Mexico, Lab Zool Acuat, Div Invest & Posgrad, Tlalnepantla 54090, State Mexico, Mexico
Tavera-Briseno, K:
Univ Nacl Autonoma Mexico, Lab Zool Acuat, Div Invest & Posgrad, Tlalnepantla 54090, State Mexico, Mexico
Nandini, S:
Univ Nacl Autonoma Mexico, UIICSE, Div Invest & Posgrad, Tlalnepantla 54090, State Mexico, Mexico
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