Third instar growth and survival, and the effect of larval density of the Japanese beetle, Popillia japonica Newman and the southern masked chafer, Cyclocephala lurida (Olivier) were evaluated on Tifway bermudagrass, Cynodon dactyl on (L.) and KY-31 tall fescue, Festuca arundinacea Schreb. in a threeyear field study. Winter survival was sometimes enhanced in bermudagrass plots. Larval weight ga...

The present study aimed to establish the information on protozoan diseases in Black tiger shrimp Penaeus monodon during the year 2012. Due to high levels of ciliate infestations can affect respiration, feeding, growth, survival and also irritation behaviour of larvae (zoea, mysis and post larvae) was observed. Protozoan diseases in P. monodon was global problem in hatcheries mainly affect the e...

In the present study, most appropriate feeding regimes for prevalent sole (Solea solea) larvae during early larval rearing staged (first month) were investigated. Two experiments conducted to improve growth performance [the ultimate Body Weight (FBW), Specific Growth Rate (SGR), and Gain (WG)] survival rate of S.

Stable flies are blood feeding parasites and serious pests of livestock. The immature stages develop in decaying materials which frequently have high ammonium content. We added various ammonium salts to our laboratory stable fly rearing medium and measured their effect on size and survival as well as the physical properties of the used media. The addition of ammonium hydroxide, ammonium phospha...

Many species of reef fishes form large spawning aggregations that are highly predictable in space and time. Prior research has suggested that aggregating fish derive fitness benefits not just from mating at high density but, also, from oceanographic features of the spatial locations where aggregations occur. Using a probabilistic biophysical model of larval dispersal coupled to a fine resolutio...

Genetic trade-offs such as between generalist-specialist strategies can be masked by changes in compensatory processes involving energy allocation and acquisition which regulation depends on the state of the individual and its ecological surroundings. Failure to account for such state dependence may thus lead to misconceptions about the trade-off structure and nature of constraints governing re...

Enrichment of live foods by essential nutrients such as highly unsaturated fatty acids is an important tool for improvement of larval fish quality. In this study, nutritional effects of Artemia urmiana enriched by fish and plant oils on growth, survival rate, body compositions and resistance against thermal, salinity and hypoxic stresses in rainbow trout, Oncorhynchus mykiss were examined. Six ...

In larval damselflies, the self-amputation (autotomy) of the caudal lamellae permits escape from predatory larval dragonflies. Lamellar joint size declines among populations with increasing risk of dragonfly predation, but the breaking force required for autotomy and the biomechanical factors that influence breaking force are unknown. If autotomy enhances survival in larval damselflies, then pr...

Ocean acidification is predicted to have significant effects on benthic calcifying invertebrates, in particular on their early developmental stages. Echinoderm larvae could be particularly vulnerable to decreased pH, with major consequences for adult populations. The objective of this study was to understand how ocean acidification would affect the initial life stages of the sea urchin Paracent...

For organisms with complex life cycles, processes occurring at the interface between life stages can disproportionately impact survival and population dynamics. Temperature is an important factor influencing growth in poikilotherms, and growth-related processes are frequently correlated with survival. We examined the influence of water temperature on growth-related early life history traits (EL...