CÔTE D'AZUR & PROVENCE
At the beginning of the March, just before the government-issued confinement, Port Camille Rayon was able to host an educational morning for local children while the environmental protection company, Ecoocean, installed their 'Biohuts', or fish nurseries in the port. A joint project with the city of Golfe-Juan-Vallauris, these special cages will protect local fish from the dangers of sea life and port obstacles.
The use of concrete, pollutants and boat parts endanger biodiversity in ports - not least on the Côte d'Azur. For this reason, Ecoceans developed artificial habitats for both fresh and seawater environments to protect fish when they are young and vulnerable. Ecocean's 'Biohuts' not only protect baby fish but also improve overall sea life and allow researchers to study the effects on local biodiversity. In fact, Ecoceans has found greatly improved sea life diversity within a very short time, recording species of fish not seen in the region for years.
The unusually drizzly day at the yacht harbour in Golfe-Juan began with children's games like Fish Memory. While some employees of the Ecocean company were busy attaching Biohut® cages to the pontoons, others informed two primary school classes about the dangerous life of fish in ports. Raising public awareness is particularly close to the company's heart, explained Sabrina Palmieri, Ecocean's spokeswoman, while in the background the schoolchildren played a life-size board game recreating the everyday life of young fish. That's why every time the company installs its Biohut modules in a port, it also co-organises an open information event and, above all, workshops for school kids. "After all, children are the adults of the future," Palmieri emphasised.
Biohut Ecocean sustainability fish nursery
In theory, harbours are a good home for growing fish that are not yet strong enough to swim against waves and therefore prefer calm waters. However, the increasing "concreting" of harbours creates a lack of food sources and hiding places for these baby fish. Water pollution as well as heavy anchors destroy the natural habitat and pose a threat to the survival of fish species. On average, only ten per cent of young fish survive to reproductive age in ports. As a result, fish populations are declining.
This is why Ecocean, a company founded by Gilles Lecaillon in Montpellier in 2003 to study the biodiversity of Mediterranean ecosystems, developed its Biohuts seven years ago. The steel cages serve as "artificial nurseries for young fish". They consist of three chambers, the middle one of which is filled with shellfish and serves as a food source. The two outer chambers offer young fish protection at all times from their predators - adult fish for whom the approximately four-by-five-centimetre grid openings are too small. These artificial habitats are installed either on the quay, on the catwalk pontoons between the boats or on rocks on the seabed.
Depending on the species, the young generation of fish remain for one to three months until they have grown up. Then they can lay up to a million eggs and live between six and fifty years. Along the Côte d'Azur, around 20 different species of fish can be found, among which the gilthead seabream and the golden maiden.
Twice a year, the facilities will be equipped with Biohut Ecocean sustainability fish and after three to four years a final assessment is made of the extent to which biodiversity has developed.
"It's a simple solution that doesn't cost a fortune," says Rémy Dubas, one of Ecocean's divers. Biohut is basically installed at the initiative of the port, which will bear part of the costs, between 10,000 and 70,000 euros for four modules. Around 20 per cent is paid by Agence Région Sud, and Agence de l'Eau also subsidizes this marine protection measure.
Protecting fish throughout France
In the Mediterranean, Biohuts have already been installed at 26 locations, including 15 on the Côte d'Azur, including Monaco, Cannes, Antibes, Marseille and Fréjus. All of these ports are committed to improving water quality both in and around the port and are certified with Ecocean for being environmentally responsible ports. Not far from Golfe-Juan, a rare and endangered species of brown grouper was sighted in another port where a Biohut is installed, Sabrina Palmieri reports with pleasure. "Perhaps we will soon see one here too. I hope so!"
The small inauguration ceremony that followed was attended by Pierre Rayon, the President of Port Camille Rayon, Harbour Master Alexandre Joskowicz and the Mayor of Golfe-Juan-Vallauris, Michelle Saluchi. The primary school children showed great interest in sea life. After the workshops, in which they eagerly participated, the children looked at the displays and information flyers. Next year, the students will come back to watch the progress of the Biohuts together with the Ecocean team.