Red tide. (Photo: M. Zhou)
Red tide bloom intensity lowers
Tuesday, July 09, 2013, 23:00 (GMT + 9)
Part of the encouraging results of the studies by the Undersecretariat of Fisheries and Aquaculture (Subpesca) shows that during the past two years low intensities of red tide bloom (Alexandrium catenella) have been detected.
Subpesca has recently released the results of studies on harmful algae in the Bio Bio, Los Lagos, Aysen and Magallanes regions, under the Hydrobiological Plague Regulation.
In the workshop held in Puerto Montt the results of three studies were shown: the historical summary of the red tide programme; the results of the Distribution and abundance of harmful phytoplankton and dinoflagellate resting cysts in selected sites in the south east of the Chiloé Island (2012 - 2013) project; and the Monitoring of harmful species in the Bio Bio region.
One of the highlighted issues was the historical analysis that was performed on the red tide programme, running since 2006, as it was announced by the head of the Subpesca Aquaculture Division, José Miguel Burgos.
"The presentation focused on the description of the Alexandrium catenella bloom phenomenon, the species declared as a plague, and how it has behaved in recent years. The fact that during the last two years there has been low bloom intensity has been highlighted, which can be viewed by the continuation of this monitoring," he explained.
"Other relevant area in this study programme has been harmful species monitoring in the Bio Bio region," continued Burgos, "this research is very important given the number of management areas that exist in the region coupled with the practice of introducing benthic species from other areas in order to restock. So far there has been very little information on harmful phytoplankton species in the area so that this study contributes to providing more background for the region."
In addition to these studies, Subpesca is bidding the project Evaluation of Didymosphenia geminata (Didymo) in water bodies of the central-southern area through the Fund for Fisheries Research and Aquaculture, for which a budget of CLP 70,000,000 (USD 317,700) has been allocated.
"While this algae is not harmful to health, it is considered a plague due to the environmental impact generated in the rivers it is found, which is the reason why a surveillance, monitoring and release programme has been developed throughout the southern area of the country," the authority explained.