This was a fun read that had me laughing many many times Science now believes that this material has a role in buoyancy by being cooled and contracting to become more dense when the whale is diving and then becoming heated and expanding to allow the whale to ascend from such great depths. Chatdarong K, Lohachit C, LInde-Forsberg C Distribution of spermatozoa in the female reproductive tract of the domestic cat in relation to ovulation induced by natural mating. This is some of the funniest stuff I have read this summer. It is well known that Sertoli cells are involved in several important processes, such as the elongation of spermatids and the formation of sperm tails Griswold, , among others.
There was no significant difference in the mean number of non-motile spermatozoa found within the culture plates for any of the treatments Figure 4b. Post-ovulatory flush fluid was associated with a high percentage of detached spermatozoa that had transitional and hyperactive motility. Journal of Personality and Social Psychology Tissue was collected from bitches undergoing routine ovariohysterectomy for the purpose of surgical neutering at various stages of the oestrous cycle. All statistical analyses were performed using the SPSS There was no significant difference in the mean number of non-motile spermatozoa found within the culture plates for any of the treatments Figure 3b.
Sperm Whales – Magnificent and Misunderstood | The Marine Detective
Eberhard WJ Female Control. A normal analysis was then carried out and the correct sperm concentration was calculated after analysis. Our study tested the general hypothesis that among males there would be a negative relationship between the use of tactics for the engagement in and avoidance of sperm competition, by examining the relationship between mate guarding and ejaculate quality in humans. Sexual harassment and feeding inhibition between two invasive dengue vectors. Smith TT, Yanagimachi R Attachment and release of spermatozoa from the caudal isthmus of the hamster oviduct. Today, the subsistence hunt of sperm whales off Lamalera, Indonesia, is possibly the only example of sperm whales killed, at least in part, because of the chance of finding ambergris. Yesterday, Samoa paused once more to pay tribute to the work of the public service.
Good article , thanks and we would like extra! The Really Astonishing Hypothesis: For this reason, ejaculates with more uniform size of these sperm traits may be more successful at achieving fertilizations under competitive mating scenarios. Additionally to these cut-off settings, each recorded video was visually checked in order to ensure that neither debris nor dead-spermatozoa were included as motile sperm. One is that more males are alive at these later ages, and thus capable of continued fathering. By The Marine Detective on August 9, He is the co-author of Fatherhood.