Why can only a limited number of offspring can survive in a fish population?

Why can only a limited number of offspring can survive in a fish population?

In a fish species, the number of eggs that hatch and survive for one year varies depending on the number of eggs that were produced. As the number of eggs produced increases past a threshold number, the survival rate of the offspring decreases.

Why do many species of animals produce more than 1 offspring?

In fact, all animals produce more offspring than can survive long enough to reproduce themselves. This increases the likelihood that at least one offspring will survive to adulthood to carry on the genetics of the parent. The number of offspring produced is often related to the amount of parental care.

Why do you think animals can reproduce in large number?

A single individual can produce offspring asexually and large numbers of offspring can be produced quickly. The genetic diversity of sexually produced offspring is thought to give species a better chance of surviving in an unpredictable or changing environment.

Why does internal fertilization produce fewer offspring?

Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Even though fewer offspring are produced through this method, their survival rate is higher than that for external fertilization.

How does having a large number of offspring affect a Parents fitness for subsequent breeding seasons?

How does having a large number of offspring affect a parent’s fitness for subsequent breeding seasons? The increased energy needed to feed many offspring may lower adult survival in the following breeding season.

Why do organisms face a trade-off between growth and fecundity?

Why do organisms face a trade-off between growth and fecundity? Many organisms do not survive to reach the age where the traits increase survival.

Why do animals produce thousands of offspring?

1. Organisms produce more offspring than actually survive. One reason that not all organisms survive is that there are not enough resources, things that they need, to go around. Organisms must struggle to get what they need to survive, competing against other organisms that want the same things they do.

Why do animals produce their new offspring?

Most importantly, reproduction is necessary for the survival of a species. This type of reproduction produces genetically-identical organisms (clones), whereas in sexual reproduction, the genetic material of two individuals combines to produce offspring that are genetically different from their parents.

Why is external fertilization limited to aquatic animals?

External fertilization is where the eggs and sperm involved in sexual reproduction unite outside the body of the organisms. In this process, there needs to be some way of getting the sperm to the egg. In animals like earthworm external fertilization takes place in cocoon. This doesn’t need presence of water.

Do fish offspring usually develop inside or outside the mother?

In most fish species, fertilization takes place externally. These fish are oviparous. Eggs are laid and embryos develop outside the mother’s body. In a minority of fish, including sharks, eggs develop inside the mother’s body but without nourishment from the mother.

What was the main factor that led to declines in collared lizard Crotaphytus Collaris populations in the Ozark Mountains of Missouri?

Blanka L. What was the main factor that led to declines in collared lizard (Crotaphytus collaris) populations in the Ozark Mountains of Missouri? Suppression of forest fires decreased the open habitat that collared lizards require.

What is used to distinguish aquatic biomes?

Aquatic biomes are distinguished by the availability of sunlight and the concentration of dissolved oxygen and nutrients in the water. The photic zone extends to a maximum depth of 200 meters, while the aphotic zone is deeper than 200 meters. Aquatic biomes in the ocean are called marine biomes.

Why do some animals produce more offspring than others?

In fact, all animals produce more offspring than can survive long enough to reproduce themselves. This increases the likelihood that at least one offspring will survive to adulthood to carry on the genetics of the parent. The number of offspring produced is often related to the amount of parental care.

Why do fish and frogs lay hundreds of eggs at a time?

Since, the fishes and frogs are small in size they lay eggs in large numbers so, if their nests are attacked (which is sure) by those above them in food chain some eggs still survive and the family survives. I hope i was clear to you. Why do lizards and fish lay hundreds of eggs at a time?

How are offspring produced after internal fertilization in fish?

There are three ways that offspring are produced following internal fertilization. In oviparity, fertilized eggs are laid outside the female’s body and develop there, receiving nourishment from the yolk that is a part of the egg. This occurs in most bony fish, many reptiles, some cartilaginous fish, most amphibians, two mammals, and all birds.

How is the fecundity of an animal related to its offspring?

The number of offspring produced is often related to the amount of parental care. Typically, the higher fecundity, the lower the amount of time parents devote to caring for the offspring. Animals have limited amounts of energy they can use for reproduction.