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European Lymnaeidae (Mollusca: Gastropoda), intermediate hosts of trematodiases, based on nuclear ribosomal DNA ITS-2 sequences.
The ITS-2 proves to be a useful marker for resolving supraspecific, specific and population relationships in Lymnaeidae and results suggest that retaining Stagnicola as a subgenus of Lymnnaea may be the most appropriate and that genus status for Omphiscola is justified.
Determination of semen quality of the rainbow trout, Oncorhynchus mykiss, by sperm motility, seminal plasma parameters, and spermatozoal metabolism
The relationships between semen fertilization capacity and sperm motility, seminal plasma composition and sperm metabolism in the rainbow trout, Oncorhynchus mykiss, is investigated to find out biomarkers for semen quality.
Motility of spermatozoa ofAlburnus alburnus (Cyprinidae) and its relationship to seminal plasma composition and sperm metabolism
The composition of seminal plasma and metabolism of sperm of the cyprinid fishAlburnus alburnus were investigated. Statistically significant correlations were found between motility parameters and
Physiological and biochemical parameters for egg quality determination in lake trout, Salmo trutta lacustris
The relationships between egg viability and ovarian fluid composition, egg physiology and egg metabolism in lake trout, Salmo trutta lacustris, are investigated to obtain biomarkers for egg quality determination and subjective and visual control methods were described to distinguish between batches with viable and non viable eggs.
Changes in Morphology, Physiology, Metabolism, and Fertilization Capacity of Rainbow Trout Semen following Cryopreservation
Alterations in morphology, physiology, metabolism, and fertilization capacity of the semen of rainbow trout Oncorhynchus mykiss after cryopreservation were investigated and spermatozoa showed intensive signs of swelling of the head and midpiece regions and of the mitochondria in frozen–thawed semen.
Sperm motility of the marine teleosts Boops boops, Diplodus sargus, Mullus barbatus and Trachurus mediterraneus
The spermatozoa of Boops boops, Diplodus sargus, Mullus barbatus, and Trachurus mediterraneus were motile in sea water, and in electrolyte solutions and non-electrolyte solutions with an osmolality of 600–1000 mosmol kg−1, and species-specific parameters which could not be related with the sperm motility behaviour were revealed.
Minireview: The modes of egg attachment in teleost fishes
Oocytes and eggs from teleost fishes are always surrounded by an egg envelope of variable dimensions that is largely responsible for a protective function, whereas the zona radiata externa is used to attach the eggs to the substrate where they are deposited.