Morphometric changes in Lecane stokesii (Pell, 1890) (Rotifera: Lecanidae) induced by allelochemicals from the predator Asplanchnopus multiceps (Schrank, 1793)
Por:
Soto, CS, Sarma, SSS
Publicada:
1 jul 2009
Resumen:
Changes in the morphometry (dorsal and ventral plates and posterior spine lengths of lorica) of Lecane stokesii were quantified with or without the presence of allelochemical asplanchnin from the predatory rotifer Asplanchnopus multiceps. As in many other species of Lecane, the dorsal plate of L stokesii is wide, the ventral plate is long (total lorica length, excluding spines 130-138 mu m) and there is a linear relation between the length and the width of lorica. Compared to the size of L. stokesii lorica cultured without asplanchnin, animals cultured in a medium with this allelochemical showed significant increase (up to 10%) in the size of lorica. The posterior spines of L. siokesii grew 25% longer, when cultured with asplanchnin than those cultured without asplanchnin. However, we did not observe significant changes in the anterior spine lengths of L stokesii, when cultured with or without asplanchnin in the medium. The presence of two posterior spines of lorica appeared as a stabl
Filiaciones:
Soto, CS:
Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico
Sarma, SSS:
Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico
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