POPULATION DYNAMICS OF HETEROCYPRIS INCONGRUENS (RAMDOHR, 1808) (OSTRACODA, CYPRIDIDAE) IN RELATION TO DIET TYPE (ALGAE AND ORGANIC WASTE) AND AMOUNT OF FOOD
Por:
Juarez-Franco, MF, Sarma, SSS, Nandini, S
Publicada:
1 ene 2009
Categoría:
Aquatic Science
Resumen:
Population growth patterns of the ostracod, Heterocypris incongruens have been studied using the green alga, Scenedesmus acutus or organic waste from a water treatment plant as food, and using dry weight equivalents of 5.8, 11.6, and 23.2 mu g ml(-1) for 50 days. H. incongruens, in our study, reproduced only parthenogenetically. The colour of the eggs and the carapace valves differed depending on the type of food. Populations cultured on the algae appeared bright orange-coloured, while those on organic waste were pale yellow. Regardless type and concentration of food, H. incongruens had a long lag phase of about 3 weeks, after which the exponential phase began that continued for the next 20 to 30 days. In treatments containing an algal diet, the density of H. incongruens increased with the increase of food level from 5.8 to 11.6 mu g ml(-1). However, a further increase in food density did not result in a higher peak of abundance. In the treatments containing organic waste, population d
Filiaciones:
Juarez-Franco, MF:
Univ Nacl Autonoma Mexico, Mexico City 04510, DF, Mexico
Sarma, SSS:
Univ Nacl Autonoma Mexico, Div Invest & Posgrado, Lab Zool Acuat, Tlalnepantla 54090, State Of Mexico, Mexico
Nandini, S:
Univ Nacl Autonoma Mexico, Div Invest & Posgrado, UIICSE, Tlalnepantla 54090, State Of Mexico, Mexico
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