Heibo, E. 2003. Life-history variation and age at maturity in Eurasian Perch (Perca fluviatilis L.) This thesis deals with life-history variation in perch, with special focus on age at maturity. We conducted field studies to uncover the variation within short geographic distances and a literature review to study variation on a large geographic scale in order to reveal some factors affecting lif...

ABSTRACT The reproductive biology of thresher shark species the Ecuadorian Pacific was analysed based on 1236 specimens Alopias pelagicus (711 females and 525 males) 354 A. superciliosus (164 190 landed in “Playita Mía”, from January to December 2019. length ranged between 67.2 184 cm PCL (precaudal length) males 69.0 178.4 PCL, registered a minimum maximum size 76.0 202.2 for 94.0 204.8 males....

This study was conducted in Oymapınar Dam Lake from March 2016 to February 2017. The investigated the age composition, spawning season, sex ratio, first sexual maturity, and fecundity of chub (S. anatolicus). ages 422 chubs sampled ranged II VIII which 200 (47.39%) were females 222 (52.61%) males. fork lengths weights female varied between 20.0 cm 55.1 93.37 g 2307.88 respectively. oldest group...

This study was conducted at the Gorgan University of Agricultural Sciences and Natural Resources farm, Iran, Golestan province with about 600 mm annual rainfall in order to evaluate the effect of different sowing dates on Azivash (Corchorusolitorius) seed quality, using a randomized complete block design with three replications on 2013. Treatments were four sowing dates such as May 5, ...

A method is reported by which the "in utero" crownrump length of the fetus may be determined by sonar in the first trimester of pregnancy. The accuracy of the technique was assessed by comparing the sonar and the direct postabortum measurements of fetuses in cases of missed abortion. A normal curve of fetal crown-rump length was derived from 214 examinations on 80 patients and by using these va...

water scarcity is a major factor for limiting crop growth and development in arid and semi-arid regions. in order to study the effects of varying timing and severity of water deficit on mung bean phenological traits, a field experiment was carried out during 2009 growing season at agricultural research institute of zabol university. the experiment was laid out in split plot by using a randomize...

This study aimed to characterize production and reproduction performances in Rhode Island Red-White strain chicken developed and maintained at the Central Avian Research Institute, Izatnagar. Three hundred and forty six fertile eggs were set in automated electric incubation and 234 chicks were investigated in three hatches. The performance data was analyzed by least squares analysis of variance...