Somatic and population growth responses of Ceriodaphnia dubia and Daphnia pulex (Cladocera) to changes in food (Chlorella vulgaris) level and temperature
Por:
Gama-Flores, JL, Huidobro-Salas, ME, Sarma, SSS, Nandini, S
Publicada:
1 jul 2011
Resumen:
We quantified the combined effects of three food levels (0.01 X 10(6), 0.1 X 10(6) and 1.0X10(6) cells ml(-1)) and three temperature levels (15,20 and 25 degrees C) on the somatic and the clonal population growth of two cladocerans Ceriodaphnia dubia and Daphnia pulex for 24 to 42 days. The somatic growth data showed that both the cladoceran species began to increase their body size within 3 days and remained stable beyond a week. Food density had a significant effect on the body size of C. dubia while for D. pulex, food level and temperature as well as their interaction had significant effect on the body size. The population growth of both the cladoceran species was affected by temperature. At 15 degrees C, C. dubia showed little growth at the highest food density, while at low food level, there was some increase in the population abundances, especially after a long lag phase of about 2 weeks. At 15 degrees C and under the lowest tested food level, the population of D. pulex did not i
Filiaciones:
Gama-Flores, JL:
Univ Nacl Autonoma Mexico, Tlalnepantla 54090, State Of Mexico, Mexico
Huidobro-Salas, ME:
Univ Nacl Autonoma Mexico, Tlalnepantla 54090, State Of Mexico, Mexico
Sarma, SSS:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, Lab Aquat Zool, Tlalnepantla 54090, State Of Mexico, Mexico
Nandini, S:
Univ Nacl Autonoma Mexico, Div Res & Postgrad Studies, Lab Aquat Zool, Tlalnepantla 54090, State Of Mexico, Mexico
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