... system based on open source software for characterization of zebrafish sperm motility parameters . Theriogenology 67 , 661 - 672 . 10.1016/j.theriogenology.2006.10.003 Wylde , Z. , Crean , A. J. and Bonduriansky , R. ( 2020 ). Effects of condition and sperm competition risk...

...Gen L. Takei; Chinatsu Mukai; Makoto Okuno SUMMARY Salmonid fish sperm motility is known to be suppressed in millimolar concentrations of extracellular K + , and dilution of K + upon spawning triggers cAMP-dependent signaling for motility initiation. In a previous study, however, we demonstrated...

...Daniel White; Eve de Lamirande; Claude Gagnon SUMMARY Numerous kinases and phosphatases are most likely implicated in sperm motility initiation and maintenance. Data on these signaling molecules were mostly obtained from studies conducted on in vitro demembranated–reactivated sperm models...

...Helena Elofsson; Katrien J. W. Van Look; Kristina Sundell; Henrik Sundh; Bertil Borg SUMMARY Sperm of the three-spined stickleback Gasterosteus aculeatus display a prolonged motility in the presence of ovarian fluid. The ovarian fluid prolongs sperm motility in freshwater from approximately 1 min...

... selection, thereby explaining why laboratory tests of sperm function, performed on whole ejaculates, are unable to account for the boar-specific skewing effects. We have previously shown that boar sperm motility is highly stimulated by bicarbonate, a naturally abundant component of oviductal fluid. Using...

... in the presence of K + induced the initiation of motility even though a large amount of K + was present. Another organic alcohol, erythritol(CH 2 OH(CHOH) 2 CH 2 OH), had a similar effect,but ethylene glycol (CH 2 OHCH 2 OH) did not initiate sperm motility. Furthermore, this glycerol-treated sperm showed motility...

...Masaya Morita; Akihiro Takemura; Makoto Okuno SUMMARY Euryhaline tilapia Oreochromis mossambicus can reproduce in freshwater and in seawater. Regulation of sperm motility appears to be modulated during acclimation of the fish from freshwater to seawater, being independent of extracellular Ca 2...

...M. Morita; A. Takemura; M. Okuno SUMMARY Euryhaline tilapia Oreochromis mossambicus acclimates to the external spawning environment by modulating its mechanism for regulating sperm motility. Adaptation of sperm was performed by acclimating fish in various environments. In this paper, regulatory...

... Limited 1995 flagella cilia basal body centriole sperm tail sperm motility caged ATP dynein Gallus domesticus The basal region of the eukaryotic flagellum and the cilium always contains specialised structures. In most cases there is a basal body (or distal centriole), which may...

... that they were immotile immediately after their release from the gonopores, but that they subsequently became motile following dilution in sea water. It was determined that under the pH conditions of the coelomic cavity (pH 7.3) sperm motility was suppressed, whereas upon dilution in sea water buffered at pH 8.2...

... μ 1 of the K + -free 100 mmol 1 -1 NaCl solution in which spermatozoa that have acquired the potential for motility actually exhibit motility (see Morisawa, Suzuki & Morisawa, 1983 ) and sperm motility was observed as described before ( Morisawa & Morisawa, 1986 ). After incubation, the pH...

.... All experiments were performed within 1 h after collecting the semen. The semen was suspended in 100 mmol 1 -1 NaCl solution, buffered with 10–20 mmol 1 -1 Hepes—NaOH at pH 7·7, and placed on a glass slide without a cover at room temperature, 20°C. The duration of sperm motility and number...

... of sperm motility in the Salmonidae, and that sperm motility in these species is suppressed by the seminal potassium in the sperm duct, and initiated by a decrease in potassium concentration surrounding spawned spermatozoa when they are released into fresh water. 15 11 1982 28 03 1983 ©...

... CaCl 2 , 1 mmol kg −1 MgCl 2 , 10 m m Hepes-NaOH buffer at pH 7·7), the structure of the head, midpiece and tail remained almost intact ( Fig. 6A ; also see Morisawa, 1979 ). If this medium was diluted by one-half, a dilution at which the sperm motility is almost at a maximum ( Figs 2 , 3 ), each...