Larval cannibalism was observed in the Indus Valley toad, Duttaphrynus stomaticus in Jammu (India), in a natural temporary breeding pond. The larvae were found feeding on eggs and other conspecifics. The behavior was most probably because of the high population density and scarcity of the nutritious food which act as crucial factors in prolonged breeding cycles in temporary and fast drying wate...

In order to evaluate the possible correlation between the tree density and the human population density, the forested area in Nav Asalem district located in Guilan Province was selected. The descriptors of tree number and basal area per hectare as well as the stand density index were used to determine the tree density, which was conducted from a 2014 forest inventory including 62 cluster (558 p...

Samia cynthia ricini Boisduval Lepidoptera:Saturniidae is a lepidopteran insect that has gregarious behaviour during their larval stage. This research aimed to determine the minimum population limit of larvae can support survival S. c. by observing development time, fecundity, and hatchability eggs produced adult moths under different densities rearing conditions. The was conducted lifecycle at...

—Stock–recruit models typically use only spawning stock size as a predictor of recruitment to a fishery. In this paper, however, we used spawning stock size as well as larval density and key environmental variables to predict recruitment of white crappies Pomoxis annularis and black crappies P. nigromaculatus, a genus notorious for variable recruitment. We sampled adults and recruits from 11 Oh...

The objectives of the present study were to determine if spatial differences existed between zooplankton, larval yellow perch Perca flavescens and bluegill Lepomis macrochirus (<13 mm total length, L(T)) in Pelican Lake (332 ha), NE, U.S.A. It was hypothesized that wind could act as a transport mechanism for larval fishes in this shallow lake, because strong winds are common at this geographic ...

To evaluate the influence of larval density in development of Aedes aegypti mosquitoes we evaluated three different densities. It was observed that conditions of high larval density and shortage of food produced a reduction in the size of adults and increased mortality rate of Aedes aegypti in laboratory conditions.

We used literature data to compare the relative influences of body size, water temperature, food density and experimental method on laboratory derived estimates of the ingestion rates of marine fish larvae. We subsequently used these results to evaluate whether larval feeding rates in nature are likely to be food-limited. Larval dry weight, temperature and food density explained 85 % of the var...