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Low concentrations of glyphosate-based herbicide cause complete loss of sperm motility of yellowtail tetra fish Astyanax lacustris
(2018-04-01)
Environmental relevant concentrations of glyphosate-based herbicide as 50 µg l−1, 300 µg l−1 and 1800 µg l−1 can affect sperm quality of yellowtail tetra fish Astyanax lacustris. Viability of sperm cells was impaired at ...
Sperm motility in ocellate river stingrays: evidence for post-testicular sperm maturation and capacitation in Chondrichthyes
(Wiley-Blackwell, 2019-01-01)
Sperm maturation, as a process through which spermatozoa acquire the ability for motility activation and fertilization, is well-known for many groups of animals. This process takes place in a taxon-specific manner in ...
Spermatozoa characterization in the one-sided livebearing Jenynsia multidentata (Cyprinodontiformes: Anablepidae)
(Universidad de Costa Rica, 2014)
Ratio of sperm, oocytes and water for artificial fertilization of Brycon insignis (Characiformes: Characidae)
(2022-03-01)
To promote the maximum fertilization rates (FRs) and normal embryonic development, the appropriate ratio of motile sperm to oocytes and adequate water volume should be applied in fish. Therefore, the aim of this study was ...
High fishing intensity reduces females' sperm reserve and brood fecundity in a eubrachyuran crab subject to sex- and size-biased harvest
(2017)
Size-selective male fisheries may result in sperm limitation whereby the number of sperm is insufficient to fertilize all oocytes produced by females. In eubrachyuran crabs, females have seminal receptacles for sperm storage ...
Grooves surrounding the micropyle decrease the inseminating dose in fish
(Cambridge Univ Press, 2017-12-01)
In fish with external fertilization, sperm must reach the oocyte through the micropyle to enter the cytoplasm. Fertilization success is then influenced by characteristics of oocytes or sperm. In this study, we evaluated ...
Acute exposure to hyperosmotic conditions reduces sperm activation by urine in the yellowtail tetra astyanax altiparanae, a freshwater teleost fishExposição aguda a condições hipereosmoticas reduz ativação do sêmen por urina em lambari do-rabo-amarelo (Astyanax altiparanae), um teleósteo de água doce
(2020-01-01)
In freshwater fish with external fertilization, sperm sampling can be contaminated with urine, which triggers motility and gives rise to decreased fertilization success. The maintenance of freshwater fish in hyperosmotic ...