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In oviparous fish, internal fertilisation requires the male to use some sort of intromittent organ to deliver sperm into the genital opening of the female. Examples include the oviparous sharks, such as the horn shark, and oviparous rays, such as skates. In these cases, the male is equipped with a pair of modified pelvic fins known as claspers.
Oviparous fish are fish that reproduce by spawning fertilized eggs outside of the body that grow into hatchlings.This process is unlike live-bearing viviparous species, which develop and nourish embryos and inside the womb, or live-beaering ovovivipary species, which develop and nourish eggs with egg yolk.
The traditional modes of reproduction include oviparity, taken to be the ancestral condition, traditionally where either unfertilised oocytes or fertilised eggs are spawned, and viviparity traditionally including any mechanism where young are born live, or where the development of the young is supported by either parent in or on any part of their body.
Five modes of reproduction can be differentiated in fish based on relations between the zygote(s) and parents: [6] [7] Ovuliparity : Fertilization of eggs is external; zygotes develop externally. Oviparity : Fertilization of eggs is internal; zygotes develop externally as eggs with large vitellus .
Animals make use of a variety of modes of reproduction to produce their young. Traditionally this variety was classified into three modes, oviparity (embryos in eggs), viviparity (young born live), and ovoviviparity (intermediate between the first two).
Oviparous fish (1 P) Pages in category "Fish reproduction" The following 15 pages are in this category, out of 15 total. ... Pregnancy in fish;
Ovoviviparity, ovovivipary, ovivipary, or aplacental viviparity is a term used as a "bridging" form of reproduction between egg-laying oviparous and live-bearing viviparous reproduction. Ovoviviparous animals possess embryos that develop inside eggs that remain in the mother's body until they are ready to hatch.
This type of reproduction had been seen before in bony fish, but not in cartilaginous fish such as sharks. [27] In the same year, a female Atlantic blacktip shark in Virginia reproduced via parthenogenesis. [28] On 10 October 2008, scientists confirmed the second case of a "virgin birth" in a shark.