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Several methods exist for the breeding or propagation of cultivated fish. Choosing among them depends on the reproduction biology of the species, on local environmental conditions and on the facilities available.
Fish Reproduction and Development. Nearly all fish reproduce sexually, and most species have separate sexes. Those without separate sexes avoid self-fertilization by producing sperm and eggs at different times. Each fish typically produces a large number of gametes. In most fish species, fertilization takes place externally. These fish are ...
PRACTICAL TECHNOLOGIES OF THE ARTIFICIAL PROPAGATION OF CULTIVATED FISH SPECIES. 1. GENERAL TECHNOLOGY FOR FISH PROPAGATION. 1.1 Culture and Management of Brood Stock. 1.2 Environmental Conditions for Culturing Breeders. One prerequisite of intensive fish culture technology is to have healthy fish seed in the required amount available.
5 paź 2017 · Most fish deposit much yolk (vitellogenesis) in developing eggs. Migrations, beach-spawning and mouth-brooding are some of the interesting variations. Fertilization is predominantly external but is internal in some groups such as chondrichthyans.
22 mar 2020 · There are numerous ways to look at the ecology of reproduction in fish. I will start with the basics of males and females getting together and then take a look at what they do once they get together (spawning and aftercare techniques). Then, finally, I shall talk about egg production. Gender Disposition: Dioecism, Pathenogenesis, Hermaphrodism.
28 lut 2021 · Budding is a form of asexual reproduction that results from the outgrowth of a part of a cell or body region leading to a separation from the original organism into two individuals. Budding occurs commonly in some invertebrate animals such as corals and hydras.
