BACKGROUND Despite accelerated global population declines due to targeted and illegal fishing pressure for many top-level shark species, the impacts of coastal habitat modification have been largely overlooked. We present the first direct comparison of the use of natural versus artificial habitats for the bull shark, Carcharhinus leucas, an IUCN 'Near-threatened' species--one of the few truly e...

As an attempt to find an inexpensive and simple laboratory method for artificial insemination (AI) bull semen quality assessment, the osmotic resistance of spermatozoa was measured using the hypoosmotic swelling (HOS) test, developed by Jeyendran et al. (1984) (labelled HOS-1), and its modifications (HOS-2, HOS-3), with decreased osmotic pressure aimed at challenging sperm survival ability. The...

ANGUSJournal n September 2011 Breeder question No. 1 Which is more important when doing a bull BSE, measuring a bull’s scrotal circumference or evaluating the semen that he produces? Response: Scrotal measurements and semen characteristics are both important! This is proven by the change made in the Society for Theriogenology’s breeding soundness exam in 1992. The exam was changed from a numeri...

The Northern kelp crab (Pugettia producta) and the graceful kelp crab (Pugettia gracilis) are common primary consumers in bull kelp beds near the San Juan Islands (Salish Sea, NE Pacific). In this system, urchins (often considered the most voracious herbivores exerting top-down control on kelp beds) tend to remain sedentary because of the high availability of detrital macroalgae, but the extent...

The objective of this experiment was to evaluate the effect of bull exposure on ovarian cyclicity in postpartum Murrah buffaloes. Twentyone buffaloes between the fi rst to fi fth lactation, which had calved during September and early February, were assigned at random to receive one of the following two treatments: (1) exposure to a vasectomized bull (bull exposed, BE) and (2) isolated from bull...

we live in a world,that is based on these conflicts! this is contrary to the broad meaning of the rituals of ancient persia, even though in zoroastrianism this conflict(spenta mino and ankrah mino) have established the creations .lion and bull dispute, one of the oldest iranian art motifs are used. the authors choose the baisonghor’s kalila wa dimna and the scene at persepolis:killing the bull ...

mation of cow/calf operations running between 200-500 head reveals an investment of over $2000.00 being made for each breeding cow in land, equipment, facilities and animal unit price.1 When herd bulls are used at 1:25 to 1:40 ratios, this represents an investment of $50,000 to $80,000 which is annually dependent upon the satisfactory reproductive potential of each breeding age bull, regardless...

BACKGROUND European bison is the largest mammal in Europe with the population of approximately 4000 individuals. However, there is no report of post-mortem spermatozoa collection and cryopreservation from this species and the aim of this study was to test if the epididymal spermatozoa collected post-mortem from European bison are suitable for cryopreservation and artificial insemination (AI). ...

Animal related injuries are frequently reported in countries where the bulls are used for traditional show events like bullfighting and bull-running as well as in countries where the farming and livestock rearing is predominantly practiced. Although, they are rare among other penetrating traumas, they often tend to be mortal. They have a unique pattern of injury mechanism. Bull gore injuries fr...