N THE parasitic wasp Habrobracon juglandis (Ashm.), when a cross of I unrelated stocks is made, males (haploid) come from unfertilized eggs and females (diploid) from fertilized eggs. When the parental stocks are closely related, not only males from unfertilized eggs but also males (diploid) from fertilized eggs appear. That such biparental males should be produced was puzzling until WHITING br...

breeding biology of the great cormorants phalacrocorax carbo sinensis is assessed in thesouthern coasts of the caspian sea, iran during the years 2008-2010. about 84 nests located on 63 trees wereexamined. nests were built on large trees located in abbas abad marsh, gilan province. initially, eggs werefound on first week of april and egg laying continued until the last week of may. clutch size ...

background: the specific antibody response against newcastle disease virus (ndv) in the blood serum of chickens hatched from eggs exposed to low dose gamma-radiation was studied. materials and methods: two groups of eggs of commercial meat chicken lines were irradiated with the dose of 0.30 gy 60co gamma-rays before incubation and on the 19th day of incubation, respectively. the same number of ...

the subgroup j of alv (alv-j) has emerged as an important pathogen of meat-type chickens since1989. this virus is responsible for economic losses due to both mortality and depressed performance inchickens. so, the objective of this study is the detection of alv-j in the albumen of commercial and nativefowl eggs using rt-pcr. three hundred and seventy egg albumens were randomly selected from dif...

Kutum, Rutilus frisii kutum, is an commercially important fish in the Caspian Sea. The fish enters the rivers leading to the Caspian Sea for spawning. One of these rivers is Shiroud River. In the artificial propagation process of Kutum, different factors are involved in quality and quantity of female broods eggs and also in the best temperature and migration time for spawning. The influence of ...

the objective of this study was to evaluate the importance of environmental and genetic factors affecting semen quality; sperm volume (sv), sperm concentration (spco), total sperm (ts), fresh sperm motility (fsm), total fresh motile sperm (tfms), post thaw sperm motility (ptsm), total post thaw motile sperm (tptms), number of produced payout (npp), number of fresh motile sperm in each milt ejac...

Eggs of the indigenous laying hens are preferred by consumers to those obtained from commercial breeds. The present study aimed to compare the fatty acid (FA) composition of yolk lipids of indigenous eggs (Indigenous; n = 20) and conventional eggs (Conventional; n = 20). Indigenous and conventional eggs were collected from Lori layer hens reared under free-range condition and an commercial farm...

worldwide including iran, fasciola species are the causes of human and animal fasciolosis which have comparatively identical morphologies. the present study is aimed to identify different fasciola forms by using morphologic and morphometric variations from domestic ruminants of northwestern iran. a total of 130, 67 and 140 livers of cattle, water buffaloes and sheep respectively were collected ...