Why are some eggs not able to hatch into fishes?
Tuna do lay eggs (oviparous). Not all fish lay eggs, those that don't, like some sharks, usually retain the eggs and they hatch inside the mother. This is called ovoviviparous. Some sharks are viviparous, giving birth to live pups that did not hatch from an egg inside the mother. These sharks are able to obtain food from the mother and also by eating their weaker siblings.
Some sharks lay eggs that hatch independently of the parents and are essentially autonomous "adults" after they hatch. Others produce eggs that remain in the uterus, and hatch there with no placentation....and some produce pups that are true live births. If there are instances of the parents caring for their young it appears it has not been observed.
Most salamanders lay eggs. Almost all amphibians do. Nearly all salamanders lay eggs. However, there are a few salamanders that give birth to live young. Some salamanders lay eggs in water. These eggs hatch into salamander larvae with gills. Other salamanders lay eggs in land. Usually these eggs hatch into tiny terrestrial salamanders that do not have gills.
All toads lay eggs that are fertilized externally, most leave them in a gooey mass to hatch all on their own. However there are some kinds of toads (and frogs) that do interesting things with this egg mass. There are some that carry the eggs and the freshly hatch tadpoles around in their throat pouch. There are some that do the same with their ovi-ducts. The mid-wife toad carries its eggs around in holes in…
Mallard duck nesting on about 17 duck eggs and 3 chicken eggs should remove the baby chicks from her when hatched so she will stay on the duck eggs until they hatch?
Answer place here (by supervisor) from discussion page ; : That is way to many eggs for one duck to hatch. 8-12 is about the largest number of eggs for a nest. The mother will more than likely leave the duck eggs when most of the chicks hatch. I am not sure if you remove the chicks if she will stay sitting each duck is different. Some will stay with the nest to…
to incubate an egg you cant do it without machines.there are some wicth keep them warm untll they hatch You can incubate eggs without machines but you will have to keep the eggs warm enough probably around 106F (the body temperature of hens). You will have to rotate the eggs periodically(the hen normally does this). If you don't rotate the eggs correctly your chicks may hatch but may not. Chicks that hatch from eggs that…
She is brooding which means she is going to try to hatch eggs into chicks. Some of the other hens will lay eggs near her and she will roll those eggs under herself. If you have a rooster in the flock and want some chicks you should let her stay where she is but if your flock has no rooster then take the eggs away from her.
While all snakes are born from eggs, some species, such as garter snakes and rattlesnakes, incubate their eggs internally. The eggs hatch inside the mother and babies emerge as live young. These species are "ovoviviparous." Many other snakes, including corn snakes and pythons, lay eggs. These are "oviparous."
There are different types of Lightning bugs. Some females will lay hundreds of eggs and others will lay only about 40. How many hatch out as larva depends on how many eggs were deposited and if they survive predators. There are 4 stages to their growth into an adult lightning bug. They start as an egg, then hatch into larva, pupa and then a lightning bug.
Indian laboratory stick insects lay up to 200 eggs. They do not need any surface to lay them on they will just drop them. They take up to 3 months to hatch. It is very likely that some will have to be crushed because they will all hatch and there will be too many to be kept by 1 person. If you plan on selling them they will sell cheapest at 10p.