Table of Contents
Why do fish produce high numbers of offspring?
Rather, the rate of predation on fish eggs is high because they produce such a lot of eggs. Many fish produce thousands of minute eggs, each with an infinitesimally small chance of survival because this reproductive strategy in these species results in the highest number surviving to adulthood.
Do bigger fish produce more offspring?
Bigger fish produce “massively more offspring and larger offspring than smaller fish,” study coauthor Dustin Marshall of Monash University tells NPR.
How do fish produce young?
In most cases, the female drops eggs in the water which are immediately fertilized by sperm from the male. Another way is for fertilization to occur within the females body before she drops them into the water. With the third and final method, the female retains the eggs within her body and the young are born alive.
Why do fish and frog produce huge number of eggs each year?
Complete answer: Both fishes and frogs reproduce by means of external fertilization. The female releases the egg in water and the male also releases the sperm in water. So to maintain a constant rate of fertilization large numbers of eggs are produced by frogs and fishes.
What’s the only fish that can swim backwards?
Unlike other fish that use their whole bodies to swim, triggerfish usually get around using only their top and bottom fins. That makes them highly maneuverable—they can swim backwards and forwards, or hover like a UFO.
Why do frogs release large numbers of eggs?
In frogs fertilization is external, means it takes place outside female body. So to increase the chances of fertilization frog produce large no. Of gametes and basically sprays them over eggs released by female.
Why do fish lay so many eggs at one time?
Fish lay a large number of eggs because only a few of them, out of thousands, will be fertilized and produce a fish. This is because they are fertilized outside of the body and are highly sensitive to temperature changes and external factors. Female salmon, for instance, will lay anywhere from 1,500 eggs to about 10,000 at one time.
Where do eggs develop in an ovoviviparous fish?
In ovoviviparous fish the eggs develop inside the mother’s body after internal fertilisation but receive little or no nourishment directly from the mother, depending instead on a food reserve inside the egg, the yolk.
How are male ray finned fish able to reproduce?
Male cartilaginous fishes (sharks and rays), as well as the males of some live-bearing ray finned fishes, have fins that have been modified to function as intromittent organs, reproductive appendages which allow internal fertilization. In ray finned fish they are called gonopodiums or andropodiums,…
Why do salmon have a hard time spawning?
Among these eggs, only around 10 will successfully spawn salmon. The eggs themselves are highly sensitive, which can make it difficult for them to survive and hatch. Factors like increased pollution and warm temperatures can be contributing factors to the low success rate of fish eggs.