First record of the temperate species Daphnia curvirostris Eylmann, 1887 emend. Johnson, 1952 (Cladocera: Daphniidae) in Mexico and its demographic characteristics in relation t
Por:
Nandini S., Silva-Briano M., García G.G., Sarma, S, Adabache-Ortiz A., de la Rosa, RG
Publicada:
1 ago 2009
Resumen:
Daphnia curvirostris is a typical European species but has also been recorded in Canada and USA. This is a new record for Mexico and the taxon was collected from the Chimaliapan wetlands (State of Mexico, Mexico). Taxonomic descriptions of it are provided using both light and scanning-electron microscopes. When cultured on the green alga Scenedesmus acutus at three food levels (low, 0.5 x 10(6); medium, 1.0 x 10(6); high, 2.0 x 10(6) cells ml(-1)), D. curvirostris had an average lifespan that ranged from 13.5 to 17.6 days and a generation time of between 11.8 and 16.8 days. The gross reproduction rate was about ten neonates per female, regardless of the food concentration, while the net reproduction rate was about 4-5 neonates per female. Food level only had a significant impact on generation time. Results are discussed in light of the invasive nature of daphniids and their possible impact on locally occurring cladoceran species.
Filiaciones:
Nandini S.:
Univ Nacl Autonoma Mexico, FES Iztacala, Div Invest & Postgrad Studies, Iztacala, Tlalnepantla, Mexico
Silva-Briano M.:
Centro de Ciencias Básicas. Edificio 202., Laboratorio 1, Universidad Autónoma de Aguascalientes, Ecología. Av., C.P. 20100 Aguascalientes, Mexico
García G.G.:
Univ Nacl Autonoma Mexico, FES Iztacala, Div Invest & Postgrad Studies, Iztacala, Tlalnepantla, Mexico
Sarma, S:
Univ Nacl Autonoma Mexico, FES Iztacala, Div Invest & Postgrad Studies, Iztacala, Tlalnepantla, Mexico
Adabache-Ortiz A.:
Centro de Ciencias Básicas. Edificio 202., Laboratorio 1, Universidad Autónoma de Aguascalientes, Ecología. Av., C.P. 20100 Aguascalientes, Mexico
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