A total of 120 ejaculates from six adult Black Bengal bucks were studied to determine the semen attributes and evaluate their fertility. The various semen attributes of fresh semen were volume, sperm concentration, mass motility, live spermatozoa and normal spermatozoa percentage. All the semen attributes differed significantly (P<0.05) except normal spermatozoa percentage between the bucks. A ...

High ambient temperature is the major constraint on Buffalo productivity. The aim of this study was to evaluate the reproductive performance and thyroid gland function in winter and summer seasons in Khuzestan buffalo bulls. Six male indigenous buffaloes of Khuzestan with nearly the same age (2-3 years old) and weight were used. Semen and blood samples through jugular vein were collected, every...

A new instrument for assessing mammalian semen attributes, the Sperm Quality Analyzer, was evaluated as a potential tool for determining rooster sperm quality. The Sperm Quality Analyzer measures the “activity” of sperm in a semen sample as the sperm motility index (SMI). The SMI is defined as the number and amplitude of deflections in a light path per second as a result of sperm movement wit...

This study compared a number of semen parameters of two separate groups of the common marmoset monkey (Callithrix jacchus) in order to determine the effect of a continuous potentially stressful situation on these parameters, and thus on the monkey's reproductive ability. The semen from 16 adult male marmoset monkeys was collected and analysed to compare semen parameters between a 'normal' (cont...

A continuous decline in the number and range of capercaillie (Tetrao urogallus L.) in many European countries can be observed, mostly due to habitat destruction by human activity, unecological forestry management, and increased density of natural predators. Ex situ in vitro gene banks provide a unique opportunity to preserve the genetic material for future generations. Simple and effective cryo...

The short-term effect of gonadotrophin releasing hormone (GnRH) vaccine was evaluated in ten adult male dogs with mean weight of 8.0±1.2 kg, and age ranging between 1 and 3 years. The first group (control) comprised five intact dogs treated with normal saline, while the second group included five dogs treated with a single subcutaneous injection of 400 μg GnRH vaccine. Semen was obtained from t...

the effect of subcutaneous injections of vitamin c on the seminal characteristics of markhoz bucks (2–4-year-old) was studied. the bucks, trained to serve an artificial vagina, were randomly allotted into three equal groups (n = 4) and received daily either zero (1 ml normal saline; control group), or 20 (vitc20 group) or 40 (vitc40 group) mg per kg body weight vitamin c from july 06, 2006 to o...

The objective of this study was to evaluate the effects of selection for increased size of testes on semen and testis characteristics. Boars from a line selected for increased size of testes at 150 d of age (TS, n = 25) and a randomly selected control line (C, n = 18) were used. Semen was collected three times per week for 3 wk (TRT1) then daily for 3 wk (TRT2) beginning when boar age averaged ...

Background Sperm DNA fragmentation is known as an important cause of male infertility. The influence of sperm DNA damage on reproductive potential has been subject of many studies indicating various results and remaining the subject controversial. In this study, we investigated differences of the semen parameters and intracytoplasmic sperm injection (ICSI) outcome according to sperm DNA fragmen...