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Sperm motility of externally fertilizing fish and amphibians.
We review the phylogeny, sperm competition, morphology, physiology, and fertilization environments of the sperm of externally fertilizing fish and amphibians. Increased sperm competition in both fishExpand
Cryopreservation of hormonally induced sperm for the conservation of threatened amphibians with Rana temporaria as a model research species.
The survival of hundreds of threatened amphibian species is increasingly dependent on conservation breeding programs (CBPs). However, there is an ongoing loss of genetic variation in CBPs for mostExpand
Regeneration of whole fertile plants from 30,000-y-old fruit tissue buried in Siberian permafrost
Whole, fertile plants of Silene stenophylla Ledeb. (Caryophyllaceae) have been uniquely regenerated from maternal, immature fruit tissue of Late Pleistocene age using in vitro tissue culture andExpand
Hormonal induction of spermatozoa from amphibians with Rana temporaria and Bufo bufo as anuran models.
The use of hormonally induced spermatozoa expressed in urine (HISu) is a valuable component of reproduction technologies for amphibians. Five protocols for sampling HISu from the European common frogExpand
Congelation of cryoprotective solutions and cryopreservation of fish sperm
A study was made of the formation of ice microparticles (IMP) during freezing of cryoprotective media and the survival of fish sperm in cryopreservation. The IMP shape and size were determined byExpand
Collection and Cryopreservation of Hormonally Induced Sperm of Pool Frog ( Pelophylax lessonae )
Cryopreservation of urinal sperm is a new perspective technology for a long-term preservation of amphibian germplasm, including rare and endangered species. The article presents the results ofExpand
[Fluorescent analysis of cryopreserved totipotent cells of amphibian embryos].
The cryotolerance of totipotent cells from dissociated embryos of amphibian (grass frog Rana temporaria and grey toad Bufo bufo) was studied. Cell integrity and preservation of the cell barrierExpand
Biochemical strategy of survival of the freshwater mollusc Lymnaea stagnalis at near-zero temperatures
Effect of an autumn-winter decrease of the environmental temperature on changes of the content of free amino acids and reducing sugars was studied in tissues fluids of the freshwater mollusc L.Expand
Catecholamine activation of electrogenous Na+ −K+ -pump in identified neurones of lymnaea stagnalis
Abstract 1. Using the voltage-clamp technique catecholamine-induced hyperpolarization has been shown to be accompanied by outward currents. 2. The currents do not reverse even at membrane potentialExpand
Isolated neurons in nudibranchia mollusc: Kinetics of Ca and Na currents upon action potential generation
Abstract 1. 1. The effects of ions and channel blockers on the action potential and inward current has been examined. 2. 2. The overshoot potential was determined by Na ions. The contribution of CaExpand
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