background: inbreeding is one of the major problems of small size herds of red deer in refuge wildlife parks. objectives: the aim of the present study was to use estrus synchronization technique in red deer (cervus elaphus) based on natural mating to control the dominancy and social rank of stags and inbreeding. methods: in this study, hinds (n=6) were captured and caged at breeding season (ear...

Reproduction comes at a cost, including accelerated death. Previous studies of the interconnections between reproduction, lifespan, and fat metabolism in C. elegans were predominantly performed low-reproduction conditions. To understand how increased reproduction affects lifespan metabolism, we examined mated worms; find that Δ9 desaturase, FAT-7, is significantly up-regulated. Dietary suppleme...

OBJECTIVES The objective of this study was to evaluate physical and sexual development and reproductive physiology in female rat offspring that developed in hyperglycemia conditions in utero and during lactation. MATERIALS AND METHODS Maternal diabetes was induced in female rats by a single IV injection of streptozotocin before mating. Female offspring development was evaluated by means of th...

Sustainability - the new hype of 21st century has brought discomfort for government and society. Sustainable agriculture is essential to face our most concerning challenges: climate change, food security, environmental footprint, all which add consumers' opinions choices. Improvements in reproductive indexes can enhance animal production efficiency, guaranteeing profit sustainability. Estrus de...

High predation risk and food depletion lead to sexual reproduction in cyclically parthenogenetic Daphnia. Mating, the core of sexual reproduction, also occurs under these conditions. Assessment of the environmental conditions and alteration of mating efforts may aid in determining the success of sexual reproduction. Here, we evaluated the impacts of predation risk, food quantity, and reproducti...

effects of mating sex ratios on production performance in indian peafowl were investigated at punjabwildlife research institute, gatwala faisalabad. research was conducted from may through august 2007 toexplore the most productive mating sex ratio. the sex ratios have a significant effect on egg production.maximum mean eggs (1.63) were produced by the sex ratio 1:2 while maximum egg fertility (...

The hormone relaxin is important in female reproduction for embryo implantation, cardiovascular function, and during labor and lactation. Relaxin is also synthesized in males by organs of the male tract. We hypothesized that relaxin might be one component of seminal plasma responsible for eliciting the female cytokine response induced in the uterus at mating. When recombinant relaxin was inject...

In this study, 44 Afshari ewes were investigated that 1–4 years old with a mean weight of 54–51 kg, physical score approximately three in four experimental groups. Ewes randomly assigned into groups including Group A Control (base diet recipient), B (Flushing), C (Flushing + Vitamin E Supplement Organic Selenium), and D Mineral Selenium). Blood sampling was carried out at different intervals na...

An experiment was conducted to assess the optimum nutrient requirement and ideal mating ratios for Alabio ducks for production of fertile eggs and hatchability under rural feeding management. A total of 135 forty weeks old females and 27 males were used in the study. They were fed on low (17.5%), medium (19.5%) and high (21.5%) crude protein (CP) in diets containing approximately 3050 kcal of m...