Login

Sign Up

After creating an account, you'll be able to track your payment status, track the confirmation and you can also rate the tour after you finished the tour.
Username*
Password*
Confirm Password*
First Name*
Last Name*
Birth Date*
Email*
Phone*
Country*
* Creating an account means you're okay with our Terms of Service and Privacy Statement.
Please agree to all the terms and conditions before proceeding to the next step

Already a member?

Login

Login

Sign Up

After creating an account, you'll be able to track your payment status, track the confirmation and you can also rate the tour after you finished the tour.
Username*
Password*
Confirm Password*
First Name*
Last Name*
Birth Date*
Email*
Phone*
Country*
* Creating an account means you're okay with our Terms of Service and Privacy Statement.
Please agree to all the terms and conditions before proceeding to the next step

Already a member?

Login

Boys or girls? Brief interesting notes on coral reproduction.

As soon as our eyes open to the "world below us", the one made of water, the explosion of life and the colors of the Red Sea manifest themselves in an unmistakable and wonderful way.

Even if we start from a House Reef or a boat, whether we are preparing for a dive or a snorkel, what immediately catches our attention is the wonderful and unique classic and characteristic population of the Red Sea.

Corals and madrepores are the undisputed colonizers of a part of the world that we all love. Of course, we are always led to look into the blue, to look for strange or gigantic fish, some even funny but all very colorful, while life explodes beneath us and manifests itself in an incredible and continuous way.

What our eye sometimes does not see is instead the true essence of the Red Sea and the microscopic animals that built it are the true creators of this movement of the soul.

It is precisely the corals and madrepores, organized in sophisticated "good neighborly" relationships, that have created what is still possible to observe in locations so close to us but extremely exotic.

These organisms, specialized in the art of colonization, are governed by sophisticated and fragile relationships that as occasional visitors we must learn to respect and preserve.

Corals can reproduce Sexually or Asexually by fragmentation. Sexual fertilization obviously occurs presupposing the fertilization of the eggs by the spermatozoa. The madreporic reefs, almost all hermaphroditic, are able at different times to take on the opposite characteristics of the two sexes. In the female moment: they produce eggs, in the male moment: spermatozoa. This delicate sexual miscellany is regulated by very specific times: monthly, seasonal and in some cases annual. There are two environmental factors that mainly influence the complexity of the reproductive period: the climatic/environmental factor and the astronomical factor.

The climatic/environmental factor  because the maturation of the eggs occurs when the water reaches a certain temperature and the sperm's chances of survival are significantly amplified with warmer water.

The astronomical factor because immediately after the full moon, when the tidal flows are more contained, simultaneously and in all the seas of the world, what is called begins: coral night.

This phenomenon, which is the basis of the red tide phenomenon, replicates itself “mysteriously” also in aquariums all over the world. After the reproductive phenomenon has exhausted itself, the new colony has the basis to be able to develop and, over time, contribute to the construction of fabulous and beautiful architecture.

Reproduction by fragmentation occurs where environmental conditions are influenced by extreme conditions. Extreme for such delicate organisms as corals. Significant current flows, pebbly or gravelly seabeds are not the best conditions for the development of a new colony. For example, a current that is too strong would drag eggs and sperm away from each other, preventing them from meeting. Reproduction by fragmentation, unlike the previous ones, is much faster. The basis of development of any colony is limestone. This is produced by microscopic algae, the Zooxanthellae present in the cells of newborn polyps. The calcium necessary to build the external skeletons of the madrepores is absorbed directly from the water, because it is dissolved in it in ionic form (CA++). Thanks to the combination of bicarbonate ions (HC0-3) it is transformed into solid calcium carbonate (CA(HC03) 2) by dissociating the carbonic acid H2C03. Thanks to chlorophyll photosynthesis, the Zooxanthellae synthesize amino acids, sugars, starches and glycerols, release oxygen and reduce to a minimum the exhalations of the coral itself which lead to the dispersion of nitrogen, phosphorus and carbon dioxide into the environment. Carbon dioxide, which when dissolved in water gives rise to carbonic acid, is among the most dangerous enemies of the coral itself. It is in fact capable of dissolving the calcareous structure of the external covering. The action of the Zooxanthellae and in particular the oxygenation they guarantee allows the levels of carbon dioxide and consequently carbonic acid to be contained by "diluting" it in the water surrounding the colony.

Related Posts

Leave a Reply

Whatsapp