sábado, 3 de novembro de 2018

A Sardinha está progressivamente a abandonar as águas Portuguesas devido ao aumento da temperatura no Oceano provocado pelo Aquecimento Global / Alterações Climáticas.





Imagens do Dia / OVOODOCORVO

Reportagem da REUTERS confirma :

A Sardinha está progressivamente a abandonar as águas Portuguesas devido ao aumento da temperatura no Oceano provocado pelo Aquecimento Global / Alterações Climáticas.
Aqui temos um exemplo evidente e explícito do efeito das Alterações Climáticas na Identidade Cultural e costumes de um Povo.

(…) “This is getting very serious,” she says.

The Portuguese sardine population started to fall about a decade ago, even though there were plenty of adults at the time to sustain large catches. And around the same time, southerly species, such as chub and horse mackerel, slowly moved in.

Chub mackerel, a subtropical species that was once found only in southern Portugal, is now caught all the way up the coast.

“Probably as a consequence of warming, it is now invading the main spawning area of sardines,” Garrido says.

Alexandra Silva, who works down the hall from Garrido, has been managing the Portuguese sardine stock assessment since the late 1990s – pivotal work that the organization uses to decide the size of the sardine catch.

When she started, the northern population of the species was in trouble following a period of strong upwelling that brought unusually cold water to the surface. The southern stock, however, was relatively healthy. And in the early years of the century, the species recovered.

It was not to last. These days, without large numbers of larvae growing to maturity, the population is near collapse all along the coast from Galicia in Spain to the southern end of the Portuguese coast.

All officials can do is cut down on the fishing. But larger forces, especially climate change, are now affecting the stock in ways that fisheries managers cannot control, the two say.

Regulators have tried.

Starting in 2004, they blocked fishing during the spring, when sardines spawn. And for a while, that seemed to work. Between 2004 and 2011, the stock remained relatively healthy, with landings ranging from about 55,000 to 70,000 tons, even if the population seemed to be dipping. (From the 1930s to the 1960s, and as recently as the 1980s, fishermen landed more than 110,000 tons in a year.)


Sem comentários: