was the first to establish that the development of honeybee larvae to queen or worker is not due to genetic differences, but is regulated by the differential nourishment that the female larvae receive from the nurse bees. Queen larvae are nourished with royal jelly, a mixture of hypopharyngeal and mandibular gland secretions. In contrast, worker larvae are nourished with worker jelly formed at ...

A vast body of work exists on the endocrine regulation of frog metamorphosis ( Dodd and Dodd 1976 , Shi 1999 , Denver et al. 2002 , Buchholz et al. 2006 , Furlow and Neff 2006 , Brown and Cai 2007 ), and a separate set of literature describes the dramatic larval period diversity found among amphibians ( Duellman and Trueb 1994 , McDiarmid and Altig 1999 ). This chapter begins to unite these top...

A study was made of the nutrition different-sized sockeye salmon underyearlings during littoral feeding period in summer-autumn 1972 on lake and river habitats. Diet 2and 3-year-old individuals sampled pelagic zone analyzed also. It found, that permanent dominating component diet age groups 0+, 1+ 2+ juvenile zones Kurile Lake plankton crustacean Cyclops scutifer : up to 1700 per one stomach, m...

background : ecological studies on mosquitoes are very important in vector control programs. there are a few studies about the ecology of mosquitoes in northern iran. this study was carried out to detect fauna and larval habitat characteristics of mosquitoes. methods : this study aimed to determine fauna and the ecology of mosquitoes in neka county, mazandaran province, northern iran from april...

background : the aim of this study was to obtain new data which would be valuable to develop programs for future planning of mosquito controls in in western iran. methods : larvae and adult collections were carried out from different habitats using standard dipping and animal baited trap methods during may, june and july 2012 in two provinces (kurdistan and kermanshah) in the west of iran. char...

The influence of moisture content of mulberry leaf on the growth, development and moisture build up in the body of silkworm was studied by feeding with different maturity leaves to late age of silkworm larvae. Significantly higher larval moisture (79.78%), larval weight (65.65 g), pupal moisture (73.81%) was recorded in top tender leaf (high moisture) fed batches and least was recorded in the c...

macrobrachium rosenbergii lifecycle is unique so that the adults thrive in freshwater and larval development requires brackish water environments near to estuaries as close as possible to larval body isosmotic for minimum na/k-atpase activity and maximum atp storage. osmoregulation system at early larval stages is not formed and larval osmoregulation is mainly attributed to na/k-atpase activity...