Tribolium castaneum can survive in extremely dry environments and be one of the major insect pests broken processed grains or other stored dried foods. Additionally, this species has demonstrated resistance to some classes insecticides. The objective work was evaluate nutritional chemical composition T. castaneum, reared on maize flour, compare protein, lipids fatty acids profile, amino mineral...

— In this study, larvae of Asian seabass Lates calcarifer were fed, from mouth opening to 11 days post hatching (dph), with rotifers and then with newly hatched Artemia nauplii. Gene expression patterns of the lipolytic enzymes phospholipase A2 (PLA2) and triacylgycerol lipase (TGL) were determined by quantitative real time-PCR. The larvae were sampled at 0, 1, 2, 3, 5, 7, 10, 12, 15, 17, 20, 2...

Queen-worker conflicts in social insect societies have received much attention in the past decade. In many species workers modify the colony sex ratio to their own advantage or produce their own male offspring. In some other species, however, queens seem to be able to prevent workers from making selfish reproductive decisions. So far, little effort has been made to find out how queens may keep ...

This research tested the effects of paper birch, Betula papyrifera Marshall, condensed tannin on larval performance of the whitemarked tussock moth,Orgyia leucostigma (J. E. Smith). We conducted laboratory bioassays on Þfth stadium larvae. Larvae were reared on one of three diets: control (no condensed tannin), moderate condensed tannin (8.8% dry mass), and high condensed tannin (17.6% dry mass...

Toxicity of copper (Cu) and two biodegradable chemicalsÐan insecticide (dimethoate) and a detergent (LAS), was tested on a common forest litter invertebrate carnivore Lithobius mutabilis and its prey, Musca domestica. The chemicals were mixed into arti®cial food medium for house ̄y larvae, and the centipedes were kept on contaminated OECD soil and fed contaminated larvae. The concentrations of c...

Measurements of ammonium and phosphate excretion by the Chironomus larvae were conducted in order to evaluate the importance of these chironomids for the internal loads of a small eutrophic urban reservoir. Ammonium and phosphate excretion rates by Chironomus larvae of small size (6-10 mm total length) were significantly higher than those of the Chironomids having medium (9-11 mm) and large (11...

With the recent commercialization of transgenic rootworm-resistant maize with high levels of antibiosis to larval feeding, the biology of western corn rootworm, Diabrotica virgifera virgiferaLeConte, on hosts beyondmaize,Zea maysL., has become an important topic for which data are limited.Larval survivorship andgrowthparametersweremonitoredon the roots of 29plant species comprised of maize, mai...

Bombyx mori L. (Lepidoptera: Bombycidae) is a well-studied Lepidopteran model system because of its morphology, life cycle, and economic importance. Many scientists have placed importance on enhancing the economic traits of B. mori because it's larvae, silkworms, are vital in the production of silk. In this study, the effect of bovine milk on B. mori growth was tested. Bovine milk contains seve...

Sea bream broodstock were immunised 1 or 2 months before spawning with a novel photobacteriosis vaccine. Sixty-seven-day-old larvae (mean weight 22.3 mg) originating from immunised and non-immunised parents were experimentally infected with the Photobacterium damsela subsp. piscicida (Phdp). Larvae from immunised fish showed delayed onset and lower mortality (66.67%) compared with larvae from c...