Effects of predator (Asplanchna) type and density on morphometric responses of Brachionus calyciflorus (Rotifera)
Por:
Gama-Flores, JL, Huidobro-Salas, ME, Sarma, SSS, Nandinii, S
Publicada:
1 abr 2011
Resumen:
Asplanchna is a predatory rotifer that induces changes in the morphology of its prey, the brachionid rotifer Brachionus calyciflorus through the release of an allelochemical (kairomone asplanchnin) into the medium. We quantified the morphological changes (lorica size and posterolateral spine length) of B. calyciflorus in response to presence of 3-con-phyletic predators (Asplanchna girodi, Asplanchna brightwellii and Asplanchna sieboldii). All 3-predators induced significantly large lorica size and longer posterolateral spines in B. calyciflorus. However, magnitude of spine induction and body size changes in rotifer depended on the predator species and the duration of culture. The magnitude of induced morphological changes was in the decreasing order: A. sieboldii > A. brightwellii > A. girodi. Depending on the predator species, the body size and posterolateral spines of B. calyciflorus increased from 4 to 24% and 50 to 115% than control, respectively. The predator type and density also
Filiaciones:
Gama-Flores, JL:
Univ Nacl Autonoma Mexico, Dept Biol, Tlalnepantla 54090, State Of Mexico, Mexico
Huidobro-Salas, ME:
Univ Nacl Autonoma Mexico, Dept Biol, Tlalnepantla 54090, State Of Mexico, Mexico
Sarma, SSS:
Univ Nacl Autonoma Mexico, Lab Aquat Zool, Div Res & Postgrad Studies, Tlalnepantla 54090, State Of Mexico, Mexico
Nandinii, S:
Univ Nacl Autonoma Mexico, Lab Aquat Zool, Div Res & Postgrad Studies, Tlalnepantla 54090, State Of Mexico, Mexico
|