Definition of Spawn-Spawning

The terms spawning and spawning are equivalent and both refer to a form of fertilization of fish and amphibians, specifically external fertilization. This occurs when the cell The male sexual unites with the female outside the female's body. Fish fertilized in this way are oviparous, such as sardines, trout, salmon and, in general, the vast majority of aquatic species.

The moment in which the female expels the eggs from the interior of her is known as spawning or spawning.

It is about tiny transparent eggs that upon contact with the Water they harden. Subsequently, the male expels his sperm on the eggs so that they are fertilized.

A few days after the eggs hatch a larva accompanied by a substance slimy called yolk. This substance provides food for the fish larvae until its mouth and digestive tract have fully formed. Over time, the larvae undergoes a transformation or metamorphosis until an adult fish is finally formed.

Trout spawning

In the months of winterNormally in December, female trout are in heat and this is when spawning or spawning occurs. The spawning of these fish from

River It takes place in calm water areas where it is easier for the eggs to settle to the bottom.

Males protect these places from threat of other species. Females build a species nest to deposit the eggs and for this they remove the sand from the bottom of the river creating a furrow.

In the fertilization process, it is important that both the female's eggs and the male's sperm are released in a synchronized manner. When the eggs have been fertilized, the female covers them with gravel and then leaves the area, but the males remain vigilant to protect the eggs.

Sea turtle spawning and human presence

These animals spawn on the beaches, as it is the most suitable place to lay their eggs. However, if the females are disturbed by human presence or noise, they decide to leave the place and return to the water without having laid their eggs.

If the females find a quiet beach, they deposit their eggs in a hole made by themselves with their fins. What pattern Generally, each female lays about 100 eggs in each nest. After this initial phase, the female covers the nest with sand to camouflage its presence and avoid attack by possible predators. After hatching, very few turtles hatch and can return to the water.

Photo: Fotolia - pisotckii

Themes in Spawn-Spawning