Marine fish: breeding
Reproduction and spawning
Reproductive behavior of tropical marine fishes is poorly documented because only a few species breed in captivity. However, some – such as clowns, gobies and seahorses to breed relatively simple. Others, like coral fish may spawn in the aquarium but the fry are so immature that they are very difficult to grow.
To ensure availability in the aquarium at least one opposite-sex pairs marine fish breeding is almost impossible, because in most species males and females are externally indistinguishable just. However, if you keep the fish in the pack, their behavior will help you to determine the sex charges. If two identical fish fight is most likely male contesting territorial rights. If two fish are related to each other friendly, it can be compatible in a female and male. Unusual swimming movements or postures may not be indicative of flirting – so, in your aquarium just got a couple. In the mating season sometimes appear insignificant physical differences: the female has, of course, the belly is inflated from the calves. Males often intensifies the color, and the picture loses clarity. Some species are able to change their gender, what does not prevent, but rather contributes to the search for a pair for spawning. For example, all multiclone – males, but if you have a small group (two individuals), the dominant fish will become the female and will mate with the nearest dominant male. Kood I-frames and some coral sex change occurs in the opposite direction: the dominant individual in a purely female group turns into a male.
Regardless of the type of fish that inhabit your aquarium, you have to be patient if you want to breed individuals, acquired at a young age. Sexual maturity is usually determined by size and not age. The young bulls reach their reproductive size in three months, and the clowns become sexually Mature only after a year.
Spawning in the sea
Reproductive behavior in marine fishes is essentially the same – some the same as in freshwater. Some marine fish are long-lasting or short-form couples, while others spawn in groups or even in large quantities. Fertilization usually occurs in the body. The majority of tropical reef fish like coral and butterflies scatter the eggs. The eggs float to the surface where they drift with the current. Hatched fry are underdeveloped, so they are often called larvae. Without fins, the fry are unable to swim and simply drift on the water surface, feeding on microscopic plants and animals – plankton. Grown up and Mature the fry swim back to the reef.
This is a risky way of reproduction, since many of the eggs and the fry die. During spawning, females spawn almost daily, producing hundreds of thousands of eggs to increase the chances of survival of at least part of the offspring.
Parental care in marine species
Some species, such as clowns, gobies and pomacentridae, spawn in certain places. These fish lay eggs on the substrate or on the reef, attaching it to rocks or hiding in caves and sinks. They produce far fewer eggs than fish that scatter, but provide a higher percentage of survival, guarding the eggs until the larvae. Thereafter, the partially formed fry emerge to the surface, where they feed and grow until they return to the reef. Other species, including largemouth, collect the eggs by mouth and carrying her that way. These fish often spawn less than 50 eggs, as
more simply does not fit in the mouth. Seahorses and pipes are caviar to yourself.
The female lays eggs in the abdominal pouch of the male, where fertilization occurs. The fry hatch in the bag, leaving it free-floating individuals. Individual marine species practice internal fertilization and give birth to live fry.
If two clowns will successfully mate, they will breed throughout the year. Moreover, well-fed individuals can spawn once a month or every six weeks. It is not surprising that captive bred clowns are breeding in the aquarium rather than wild individuals.
Clowns choose the spawning site at the base of the anemone host so that in case of danger to be able to hide in the tentacles. After cleaning the place, the female lays eggs. The male releases sperm over the eggs to fertilize.
An adhesive that attaches the eggs to the spawning area. The male has the primary responsibility for the safety of eggs, attacking potential predators. He fans the eggs with its fins, increasing the flow of water to provide oxygen.
In the incubation period the colour of the eggs changes from orange to dark brown. The eggs are 1 mm in diameter is more than most marine fish, and much more than species that scatter eggs. The fry hatch after 7-10 days, usually at night.