The majority of shark species are ovoviviparous. In basic terminology, this means that, after fertilisation, eggs are formed and hatched inside the mother before live young are born into the surrounding water. During mating, the male shark inserts the clasper (similar to the mammalian penis) into the female’s oviduct and releases sperm.
In some species of shark, the first shark to hatch from their egg will then consume the other shark fetuses and their yolk sacs. This form of fetal cannibalism helps ensure only the strongest pups survive. Sharks that are ovoviviparous give birth to very small litters with only 1-8 pups. Ovoviviparous shark species include: Cookiecutter Sharks
Ovoviviparity (aplacental viviparity) is a mode of reproduction in s harks (and other animals) in which embryos develop inside eggs that are retained within the mother's body until they are ready to hatch. Ovoviviparous sharks are similar to viviparous species in that there is internal fertilization and the young are born live, but differ in that there is no placental connection and the unborn...
Certain species of sharks (such as the basking shark), as well as guppies and other fish, snakes, and insects are ovoviviparous, and it's the only form of reproduction for rays. Ovoviviparous animals produce eggs, but instead of laying them, the eggs develop and hatch inside the mother's body and remain there for a time.
Ovoviviparity. Ovoviviparous animals are similar to viviparous species in which there is internal fertilization and the young ones are born alive, but differ in that there is no placental connection and the unborn young ones are nourished by egg yolk; the mother's body does provide gas exchange (sharks and rays).. In some species, the internally developing embryos rely solely on yolk.
Oviparity refers to the several shark species that lay eggs instead of giving birth to live young. These are the minority as most species ore ovoviviparous. Once the females eggs have been fertilised inside her body (as all fertilisation is internal in sharks), she lays them outside, i.e. in the ocean.
A is correct. This shark is viviparous because it supplies nutrients to its offspring in a form other than a yolk sac. Other sharks that do not form vascular connects with their embryos are still ovoviviparous sharks, and the sharks are often born right away or eat each other for continued nourishment during development.
Sharks have a wide variety of ways of giving birth depending on the species: viviparous, oviparous and ovoviviparous. As is the case with viviparous animals, eggs are fertilized internally and are well protected inside females that nourish them through a placenta, just as mammals do.
The following list is but a small sample of those representatives of the animal kingdom that are among the ovoviviparous. 1- Shark . There are several species of sharks in which the embryo is nourished from the egg yolk until it becomes a copy identical to the adult.
The whale shark is now classified as ovoviviparous rather than oviparous, because extrauterine eggs are now thought to have been aborted. Most ovoviviparous sharks give birth in sheltered areas, including bays, river mouths and shallow reefs. They choose such areas for protection from predators (mainly other sharks) and the abundance of food.