Scattering processes are a fundamental way of experimentally probing distributions and properties systems in several areas physics. Considering two-body scattering at low energies, when the de Broglie wavelength is larger than range potential, partial waves with high angular momentum typically unimportant. The dominant contribution comes from $l=0$ waves, commonly known as $s$-wave scattering. ...

we collected 60 adult males and 85 adult females of trapelus lessonae de filippi, 1863 in early may 2008 from central iranian plateau to study sexual dimorphism in morphological traits as well as female reproductive traits. size-related sexual dimorphism occurred in all the compared body dimensions. the largest female was 83.88 mm in snout-vent length, and the largest male was 73.12 mm. as well...

ABSTRACT As in many fields of wildlife research and management, camera devices photogrammetry have become an integral part the toolkit for exploring otherwise‐unseen aspects biology, behavior, control invasive brown treesnake ( Boiga irregularis ) on Guam. Because treesnakes are cryptic nocturnal, nearly all their ecology influenced by snake size, methods needed to estimate size from images cap...

the length-weight relationship (lwr) and condition factors (cf) of 180 the oriental river prawn macrobrachium nipponense collected from southern coasts of the caspian sea from may through september 2012 were studied. shrimp samples were taken and immediately transferred to the laboratory of fish biology at university of guilan for further analyses. length, weight and other external features of ...

Reptiles in urban remnants are threatened with extinction by increased fire frequency, habitat fragmentation caused by urban development, and competition and predation from exotic species. Understanding how urban reptiles respond to and recover from such disturbances is key to their conservation. We monitored the recovery of an urban reptile community for five years following a summer wildfire ...