With an assumption that the larvae of cabbage looper, Trichoplusia ni (Hübner), a secondary pest of cotton, Gossypium hirsutum (L.), could move between cotton plants in the field, we conducted a series of laboratory experiments to determine the larval movement, food choice, consumption, survival, and development on Bt (Bollgard II expressing Cry1Ac and Cry2Ab) and non-Bt cotton. On non-Bt cotto...

Due to the negative consequences associated with the use of antibiotics, researchers, and food producers have studied alternatives, such as probiotics, for the control of fish diseases. The probiotic properties of yeasts in aquaculture have been scarcely considered. The present study investigated the probiotic properties of local yeast strains for aquaculture application in the protection of ba...

Many intertidal and shallow water crabs have strong reproductive cycles and migratory larvae. Females release larvae near the time of high water of the larger amplitude nocturnal tides during the semilunar or lunar cycles. Newly hatched larvae move quickly at night toward and into the sea where, weeks later, they develop to megalopae that then ride nocturnal flood tides inshore and up estuaries...

Ascaris lumbricoides remains the most common endoparasite in humans, yet there is still very little information available about the immunological principles of protection, especially those directed against larval stages. Due to the natural host-parasite relationship, pigs infected with A. suum make an excellent model to study the mechanisms of protection against this nematode. In pigs, a self-c...

A recently reported chitinase gene, expressed in the infective, third-stage (L3) larvae of the human filarial parasite Onchocerca volvulus, belongs to the family 18 glycosyl hydrolases and has been designated Ov-chi-1. The gene product of Ov-chi-1 is chitinolytic. Allosamidin ablates activity of the native enzyme in a dose-dependent manner but did not significantly inhibit the moulting of L3 la...

The objective of this study was to determine certain aspects of the biology of Rhipicephalus (Boophilus) decoloratus larvae under laboratory and field conditions. Larvae allowed 48 h to select a vertical questing substrate preferred 90 cm rods in length to those of 60 or 30 cm, while in a separate experiment migration from rods 5 cm or 25 cm in length to rods 45 cm in length continued between 4...

We investigated the development of the immune system during the larval stages of the mussel Mytilus galloprovincialis. The ability of trochophore and veliger larvae to phagocytose foreign particles (Escherichia coli and zymosan) was measured. Phagocytosis was detected as early as 24 h post-fertilization (hpf) using flow cytometry and fluorescence microscopy. However, although there was a high b...

The histopathological lesions caused by 3rd and 4th stage migrating larvae of Anguillicola crassus In the swunbladder and intestinal wall of eel were studled Some of the larvae were detectable in the oedematous connective tlssue of the swilnbladder subserosa and in the gas gland bvithout giving nse to a s~gnificant cellulal host reaction In some eel, tlssue proliferation consisting of epithelio...

The deep-sea blue and red shrimp Aristeus antennatus is a valuable fishing resource in the Northwestern Mediterranean Sea, currently under local co-management plan port of Palamós (Spain). management measures, although effective, might benefit other ports due to dispersal patterns species pelagic larvae. Gathering information about A. larval distribution key step describe these patterns, toward...