Demographic characteristics of the copepod Acanthocyclops americanus (Sars, 1863) (Copepoda: Cyclopoida) fed mixed algal (Scenedesmus acutus)-rotifer (Brachionus havanaensis) di
Por:
García C.E., Nandini S., Sarma, SSS
Publicada:
1 may 2011
Categoría:
Aquatic Science
Resumen:
The predatory copepod Acanthocyclops americanus is commonly found in shallow ponds and lakes in Mexico. We tested the survivorship and reproduction-related variables of this copepod, isolated from Lake Huetzalin (Xochimilco, Mexico City), on four mixed diets comprising two algal concentrations (0.8 x 10(6) and 1.6 x 10(6) cells ml(-1) of Scenedesmus acutus) and two rotifer densities (1 and 8 ind. ml(-1) of Brachionus havanaensis). Survivorship patterns of naupliar and adult stages of A. americanus were evaluated at 24 +/- A 1A degrees C. The demography experiments were initiated with five females and five males (1:1 ratio, 5th copepodites) into each of the 16 test [= 4 diet combinations x 4 replicates (cohorts)] jars containing 50 ml medium and with one of the chosen algal-rotifer diets. Data on the survival of naupliar and copepodites (up to V) showed a high death rate (80%) in A. americanus by the time nauplii reached the adult stage. The duration of developmental time for nauplii an
Filiaciones:
García C.E.:
Univ Nacl Autonoma Mexico, Programa Posgrado Ciencias Biol, Mexico City 04510, DF, Mexico
Programa de Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Edificio de Posgrado, Planta baja (Costado sur de la Torre II de Humanidades Circuito Interior), 04510 Coyoacán, Mexico City, Mexico
Nandini S.:
Univ Nacl Autonoma Mexico, Lab Zool Acuat, Div Invest Posgrad, Tlalnepantla 54090, Edo De Mexico, Mexico
Laboratorio de Zoología Acuática División de Investigación y Posgrado, Universidad Nacional Autónoma de México, Campus Iztacala, AP 314, CP 54090 Tlalnepantla, Edo. de México, Mexico
Sarma, SSS:
Univ Nacl Autonoma Mexico, Lab Zool Acuat, Div Invest Posgrad, Tlalnepantla 54090, Edo De Mexico, Mexico
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