Mariculture Essays - Aquaculture, Fisheries, Mariculture, Oyster

Mariculture Mariculture As the Spanish entered the capital city of Tenochtitlan they were astounded at the many marvels of the city but one of the things that most caught the eyes of the foreigners was the extensive plant growth on the lake surrounding the city. These images were describe the among the first recorded descriptions of large scale mariculture. Mariculture, or aquaculture, refers to the rearing of the aquatic organisms under controlled or semicontrolled conditions. Although there is a simple difference between the two, aquaculture generally refers to the exploitation of freshwater fish and mariculture more generally refers to the culture and farming of marine organisms. Simply put mariculture is underwater agriculture. There are many possibilities for the realm of mariculture, it has the potential to be a great help in the production of the food supply in the world. Mariculture is not a new development in mankinds history but it is a largely ignored form of food production. In a broad sense mariculture includes the rearing of tropical fishes, the production of minnows, koi, and goldfish; the culture of sport fishes for stocking into farm ponds, streams, reservoirs, and even the ocean; production of animals for augmenting commercial marine fisheries; and the growth of aquatic plants. Mariculture is a myriad of possibilities that involve organisms and the seas. The history of mariculture can be traced back way into the past, the Greeks and Romans were known to have fattened fish in ponds and Egyptian carvings suggest that the Egyptians may have practiced it as well. So we know that the potential for the exploitation has been there for a very long time. Why then has this type of food procurement not been used more extensively? There can be a few good reasons for this such as the availability of technologies, the difficulty of harvesting the seas, and the knowledge of the workings of the sea in order to fully use the capabilities of the ocean. We now have the technology, knowledge, and capability to successfully implement large scale mariculture. Historians say that agriculture made it possible for man to grow and expand as it has done over the last few thousand years so now one can wonder what the future holds if and when mariculture is implemented into the everyday workings of society. Could it be the next giant leap for mankind? There are many different methods to mariculture. For the most part mariculture entails the confinement of fish to earth ponds, concrete pools, or cages suspended in open water. In these enclosures, the fish can be supplied with adequate food and protected from natural predators. Some of the most common methods for mariculture are transplantation, hatchery stocking, and enclosures and retainers. Transplantation involves the movement of fish populations from a good fishing area to a location that does not exhibit a great fishing catches. In this way areas of low fish concentration are injected with an influx of fish that help to make the average much higher and thereby bring the overall population to a higher state. The next method of mariculture is hatchery stocking this process happens when people create a safe environment such as tanks, pools, or concrete or earth ponds into which they pour fish eggs. These eggs are cared for and are provided with the essential things such as nutrients and correct temperatures in which to thrive. The fish are born and raised to a certain stage and then are moved to open waters or such places as lakes, streams, and ponds. In this way these habitats are provided with ample supplies of fish and other marine organisms. Another method involves the use of enclosures and retainers. This certain method can be described in three separate ways, natural feed, supplemental feed, and no natural feed. The natural feed method works by separating the desired fish and the food providers of the fish from there predators in there own natural waters by the use of netted embayments and cages, thereby allowing the provider to grow and multiply in its own habitat and this in turn a llows the fish to multiply. The second way is supplemental feed and this method works by isolating fish in tanks or concrete ponds. In