Methods of reproducing fishes

Though aquaculture has been practiced for many years, yet the problem that still persists in modern day fish keeping and farming is the disinclination of many species to breed in captivity. When we speak of the methods of reproducing fish, we have three basic types. These three modes of reproduction are dependant on the method the fish care for their eggs.

Modes of Reproduction: fish farming and breeding

Ovopartity-this method involves the fish laying undeveloped eggs. If the fish in case are bony, then usually external fertilization takes place while in some varieties of sharks and rays, internal fertilization is the norm. Ovoviviparity- is a term that refers to internal development, without direct maternal nourishment and is an advanced at birth reproduction method of fish. Most sharks and rays adopt this method for breeding and certain types like scorpeaniforms rockfish also prefer this larval birth of reproduction.
Viviparity- refers to the internal development of new species of fish and takes place due to receiving direct nourishment from the mother fish. It can take place in a fully advanced way so much so that some sharks and surfperches are fully advanced at birth.

Fish reproduction information:
Oviparity is most common in fishes, oviparity and best of all; it is a pocket-friendly method of reproducing fish. The eggs are inexpensive to produce and since the eggs are in the water, they do not dry out as they receive sufficient oxygen and nutrients in the water. The adult fish can produce many offspring, but this mode also comes with its disadvantages: when the baby fish are born, they must first go through a larval stage for growth before they transform into the adult stage. In this larval stage, they need to fend for themselves in obtaining food and avoiding predatory attacks and since they are in captivity of sorts, they may not find a suitable environment wherein to settle down in. Therefore, the survival of individual eggs is very low and millions of eggs must be produced in order for the parent fish to successfully produce offspring.

As compared to Oviparity, the other modes have their advantages since the eggs are much less prone to predation when carried within the mother and the young are born fully advanced and ready to deal with the environment as small adults. However, with one bonus, there is also sufficient weight to the price tag of other methods of reproducing fish and this is considerably raised, as the adult fish needs to supply nutrients to its offspring; plus, the adult fish can only produce a few eggs at a time. Furthermore, the young fish are restricted to whatever environment the parent fish is limited to and if there are any deteriorating essential elements in the environment, they do not have a choice but to swim in it.