First record of the temperate species Daphnia curvirostris Eylmann, 1887 emend. Johnson, 1952 (Cladocera: Daphniidae) in Mexico and its demographic characteristics in relation to algal food density

作者：Nandini S^*; Silva Briano Marcelo; Garcia Garcia Gerardo; Sarma S S S; Adabache Ortiz Araceli; Galvan de la Rosa Ricardo

来源：Limnology, 2009, 10(2): 87-94.

DOI：10.1007/s10201-009-0264-x

• Daphnia curvirostris
• Demography
• Taxonomic description
• Wetland
• Mexico

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.

• 出版日期2009-8