El objetivo del estudio fue describir la alimentación exógena larvaria y supervivencia de Orestias luteus (Valenciennes, 1846) en condiciones controladas. se realizó el laboratorio cultivo prototipo Fundación Titicaca Perú (FUNTI-PERU) ciudad Puno (Perú). Se utilizó como material biológico, 896 unidades larvas O. donde distribuyó tres tratamientos con repeticiones: 1ro) T1 = 299 unidades, 2do) ...

Acute toxicity of 4-nonylphenol (NP) was examined in six freshwater species from three phyla - platyhelminthes, arthropoda and mollusca. Values of the 48-hour LC(50) of NP for six species ranged from 20 to 508 ug/L and values of the 96-hour LC(50) for four species ranged from 120 to 457 ug/L. The most sensitive species tested was a water flea, Ceriodaphnia cornuta, with a 48-hour LC(50) of 20 m...

Water mite (Krendowskia sp.) predation on zooplanktonic species from Lake Monte Alegre (São Paulo State, Brazil) was tested in laboratory experiments. One cladoceran, Daphnia gessneri, two copepods, Tropocyclops prasinus and Thermocyclops decipiens, and Chaoborus larvae III and IV were supplied as prey to adult mites. The cladoceran Ceriodaphnia cornuta was used in the experiment with mite nymp...

The toxicity of sediments collected from depositional and erosional substrates at two locations on the Cuyahoga River in northeastern Ohio was compared. Upstream and downstream locations from the Akron Water Pollution Control Station (Akron WPCS) were selected to evaluate effects of the Akron WPCS effluent on sediment toxicity. Seven-day Ceriodaphnia dubia bioassays were conducted on sediment e...

Environmental tracers are chemical species that move with a fluid and allow us to understand its origin material transport properties. DNA-based materials have been proposed used for tracing due their potential multitracing high specificity sensitivity. For large-scale applications of this new it is interest impact on the environment. We therefore assessed ecotoxicity sub-micron silica particle...

Seasonal changes in the diel feeding patterns of the zooplanktivorous icefish (Neosalanx taihuensis), which is an endemic species of China, were studied in the large, shallow eutrophic Lake Chaohu of China during the autumn of 2002 and summer of 2003. The results of the diel feeding rhythm indicate that icefish is a visual particulate feeder. There were large differences in diet composition and...