The Jabuka Pit, the area stretching from Croatia's Žirje island to the Italian city of Ortona contains almost one-quarter of the total biomass of commercially important fish varieties in the northern and central Adriatic.
For years the Jabuka Pit was an area where more than 30% of catches by Croatian and Italian trawlers came from. However, excessive fishing exhausted the fish stocks, and fishing has been restricted there since 2015.
The measures were successful and the fish stocks has been revived.
Addressing the summit, Plenković said that preserving the oceans is one of the most important global challenges and Croatia wants to make additional efforts in the fight against sea pollution and to preserve biodiversity.
He noted that Croatia "is making a very clear contribution" in the fight against plastic waste.
Croatia has banned the use of plastic bags and other disposable plastic products.
"Plastic is not easily degradable. Any piece of plastic that ends up in the Adriatic is negative both from the aspect of animal and plant habitats and from the aspect of keeping the Adriatic clean and maintaining Croatia's attraction as a tourist country," the prime minister told reporters.
He participated in the One Ocean Summit at the invitation of French President Emmanuel Macron.
Plenković said that as a maritime country, Croatia wants to be an example in the fight against ocean and sea pollution.
He added that on the 40th anniversary of the United Nations Convention on the Law of the Sea, it is necessary to invest maximum effort to conclude the treaty on the conservation of biodiversity to be above the national legislative framework.
"That would be yet another joint step of a binding nature that would reduce the impact of global warming," Plenković said.
BiH needs a fair election system
The prime minister used the summit in Brest to meet on its margins with European Council President Charles Michel and some other colleagues to discuss the election reform in Bosnia and Herzegovina (BiH).
Plenković announced that the issue could be discussed at the European Council and added that "Michel has a lot of understanding" in that regard.
He said that in the meantime it is important for talks between political parties in BiH to continue, primarily between the Croat and Bosniaks.
"It's good that talks were held yesterday in Sarajevo and that they will continue," he said.
"We will do everything on our part for an agreement to be reached, naturally, one that will enable a fair election system," Plenković said.
Text: Hina