the size composition, growth pattern, sex ratio and feeding habits of the blue swimming crab, portunus segnis from persian gulf in south of iran, was studied. sampling was performed by trawl net during a one- year period (july 2011 to may 2012) as processed 864 crabs was collection. the crabs carapace width ranged were from 7.5-17.5 cm for males and 7.0-16.5 cm for females. the crab carapace le...

nearly just a decade ago, olive leaf moth, palpita unionalis, was identified as an exotic pest from an olive grove in roodbar, iran. in order to plan an ipm programme regarding olive, a series of laboratory and field studies were carried out during 2001-2003 in qazvin province. to study the emergence time, number of generations, feeding behaviour and developmental periods at field, five trees (...

some biological characteristics of broodstock and juvenile kutum, rutilus kutum. were investigated using data collected from the estuaries of tajen and shirood rivers (tr and sr) (southern caspian sea basin) as well as from the caspian sea in 2012. the results showed higher condition factors (cf) in the male broodstocks kutum than those estimated in the female broodstock of both tr and sr. the ...

The pursuit of science is based on empiricism enabled by advancing technologies. Theories then emerge that unify our understanding of natural order. The trinity of experimentation, theory, and technology that underlies the scientific method cannot be placed into a hierarchy of importance. Theoretical fields quickly lose substance in the absence of robust experimentation, and theoretical conundr...