In a previous study (1) during the investigation of the mutually reinforced instrumental sexual rqponses in rats a positive correlation has been found between the male and female response latencies. The purpose of the present work was to investigate whether this correlation is related to the mating behavior. Mutually reinforced instrumental responses, rewarded by contact with an animal of the o...

Because male gene flow cannot easily be estimated directly in many organisms, Hedrick et al. (2013) provided an approach to estimate male gene flow given estimates of diploid nuclear and female differentiation. This approach appears to work well when there is lower female than male gene flow. However, in a tiger data set there was less female differentiation observed as estimated by mitochondri...

BACKGROUND Tiger populations are dwindling rapidly making it increasingly difficult to study their dispersal and mating behaviour in the wild, more so tiger being a secretive and solitary carnivore. METHODS We used non-invasively obtained genetic data to establish the presence of 28 tigers, 22 females and 6 males, within the core area of Pench tiger reserve, Madhya Pradesh. This data was eval...

The anti-fertility activity of prostaglandin synthesis inhibitors namely the non-steroidal anti-inflammatory drugs: acetyl salicylic acid, indomethacin and oxyphenbutazone were investigated in male and female albino rats and female albino rabbits. Oxyphenbutazone and indomethacin affected the reproductive process in male rats. Indomethacin 3 mg/kg. and acetyl salicylic acid 300 mg/kg produced s...

the purpose of this study was to evaluate the effect of dietary zinc levels during gestation on physical development of offspring. the statistical population consisted of adult male and female rats (albino-wistar) which were obtained from pasteur institute, iran. after mating, 9 pregnant female rats were divided into 3 groups: 1) zinc deficient group (0.05

Spennatophore transfer in the beetle Pseudoxychila tarsa/i.s occurred in a-isociation with one of the four movements of the body and aedeagus that males performed during copulation. Some copulations did not result in spermatophore transfer, and females ejected some of the spermatophores they received. This suggests females may be capable of exerting cryptic female choice. Data on spermatophore ...

Present study was undertaken to determine the median lethal dose (LD50) of β-cyfluthrin (β-cyf), a synthetic (type II) pyrethroid pesticide in male and female Swiss albino mice. The calculation of LD 50 is an initial screening step in the assessment and evaluation of the toxic characteristic of a chemical substance. The selected single doses of β-cyfluthrin based on the pilot study were 200, 22...

One hour daily exposure to cigarette smoke for two months significantly decreased the body weight and food intake in male and female albino rats. The latency for conception increased significantly and the litter size decreased. Mortality rate per litter increased and grayish discoloration of the skin in the experimental group was the only congenital anomaly seen. Testes and ovaries showed a sig...