The effect of Bacillus thuringiensis toxin Cry1Ac on the behaviour of a laboratory-selected resistant population (72-fold) of Helicoverpa armigera on Bt-cotton was evaluated. Compared with non-Bt-cotton and Cry1Ac toxin incorporated in semi-synthetic diet, resistant larvae reared on Bt-cotton had only 0.13% survival and slower development. The results suggest that Cry1Ac from Bt-cotton exerts a...

Interest in mariculture of the lion's paw scallop, Nodipecten subnodosus, is increasing due to overexploitation wild populations Mexico and species' high market demand. Four larval three postlarval trials N. subnodosus were carried out using batch- or flow-through culture 500-L tanks laboratory test variability methodology terms percent survival (S) growth. Temporal changes weight energy substr...

Understanding the spawning and rearing habitats of fishes is critical to effective fisheries management conservation. Longfin smelt Spirinchus thaleichthys an imperiled migratory fish that believed spawn rear in varying salinities; however, optimal conditions for each stage remain unknown. Here, we examined effects variation salinity on egg fertilization, hatch success, larval growth survival. ...

Venerid clam, Paphia malabarica Chemnitz, is the commercially exploited species distributed exclusively in Vembanad Lake and Ashtamudi estuary, along the south west coast of India. In this study, the survival rate and development of P. malabarica larvae were studied for 3 days in ambient salinity (33), copper (2.5 microg Cu2+ l(-1)), reduced salinities (25 and 20) and a combination of copper in...

The aim of this paper is to provide explanations of how dietary phospholipid (PL) globally improves fish larval development, including growth and survival, digestive functions and skeletal development, and to propose optimal PL levels and sources in fish larval diets. Dietary incorporation of 8–12% PL related to dry matter (d.m.) promotes growth and enhanced survival in various species. Marine ...

Both the quality and spatial configuration of a habitat can affect the distribution of its inhabitants. However, few studies have directly compared the relative effects of the two. In this paper, we focus on spatial patterns in the distribution of an oak-specific moth, Tischeria ekebladella. At the landscape level, the species was more often present on well-connected trees than on isolated tree...

The chitin synthase B gene is a key enzyme in the synthesis of insect peritrophic matrix (PM), which affects insects’ feeding behavior. was cloned from transcription library Heortia vitessoides Moore. RT-qPCR showed that HvChsb highly expressed larval stage H. vitessoides, especially on first day pre-pupal stage, as well midgut larvae and abdomen adults. After starvation treatment, found to be ...

Abstract Understanding attributes of phenology beyond the mean date a life history event, such as variability among individuals within population, is critical to predict how climate‐induced phenological shifts may alter population dynamics. Identifying impacts organisms especially needed better understand affect trophic dynamics (e.g., in top predators affecting primary production). To effects ...