This fish, related to the croaker, es really valued in countries such as Morocco, Greece, Turkey and Tunisia. (Photo: IEO)
Shi drum biological cycle completed in captivity
Wednesday, June 26, 2013, 23:30 (GMT + 9)
A team of researchers from the Marine Farming Plant of the Oceanographic Centre of Murcia of the Spanish Institute of Oceanography (IEO) obtained shi drum (Umbrina cirrosa) spawning from reproducers born in the same facility three years ago.
This achievement signals the first time the resource biological cycle in captivity has been completed.
"In this way, it becomes clear that the shi drum born in captivity and farmed in tanks, is perfectly capable of developing its reproductive system, maturing and spawning in the culture tanks," pointed out Marta Arizcun, a researcher of the project.
The shi drum is a resource of the same croaker family, and like this species, it is well adapted to captivity conditions and has a rapid growth cycle, reaching sizes close to the metre. The meat of this fish is highly valued in Morocco, Greece, Turkey and Tunisia.
In Spain, the shi drum is not a well known species among consumers, or a plentiful one, but it is prized by those fishermen engaged in angling and artisanal fishing.
By farming this fish, what is sought is to expand the fish supply in the market and re-stock natural habitats.
In 2009, the first shi drum spawning took place in the country, and since then it has been repeated every year.
So far, it has been necessary to hormonally induce females to make them spawn eggs. But this time the reproducers born and bred in captivity spontaneously spawned eggs without any hormonal stimulation, the IEO reported.
"This is another significant event that indicates that the shi drum can reach the final maturation of oocytes and expel them into the water without the administration of hormones," Arizcun stressed.
By Analia Murias