Microplastic in the stomachs of deep-sea fishes



by   |  VIEW 113

Microplastic in the stomachs of deep-sea fishes

The study: microplastic in the stomachs of open-ocean and deep-sea fishes of the North-East Atlantic, published on the Environmental pollution, tries to demonstrate how the damage caused by microplastics is now going to pollute every stratification of the oceans and land, descending to the depths of the abyss.

In the study we can read: "The presence of microplastic in marine fishes has been well documented but few studies have directly examined differences between fishes occupying contrasting environmental compartments. In the present study, we investigated the gut contents of 390 fishes belonging to three pelagic (blue jack mackerel, chub mackerel, skipjack tuna) and two deep-sea species (blackbelly rosefish, blackspot seabream) from the Azores archipelago, North-East Atlantic for microplastic contamination.

Our results revealed that pelagic species had significantly more microplastic than the deep -water species. In all of the species studied, fragments were the most common plastic shape recovered and we found a significant difference in the type of polymer between the pelagic and deep-water species.

In deep-sea fish we found almost exclusively polypropylene, whereas in the pelagic fish, polyethylene was the most abundant polymer type. Overall, the proportion of fish containing plastic item s varied across our study species from 3.7% to 16.7% of individuals sampled, and the average abundance of plastic items ranged from 0.04 to 0.22 per individual (the maximum was 4 items recovered in one stomach).

Despite the proximity of the Azores archipelago to the North Atlantic subtropical gyre, a region of elevated plastic abundance, the proportion of individuals containing plastic (9.49%) were comparable with data reported elsewhere."

The Panda increases its numbers but...

The giant panda is the symbolic animal for the fight against the extinction of many species. WWF decided to use it as its main symbol. 50 years ago the species was reduced to less than 1000 specimens and classified as endangered, but the attention of the world and the response and efforts of China managed to protect and make the species relatively safe.

There are over sixty-seven Chinese nature reserves many of them with bamboo forests, the food of pandas. Today there are 1864 specimens: an almost double number compared to 1970. But the other species? Anyway a scientific study published in Nature Ecology and Evolution has shown that while the number of pandas has been increasing, leopards, wolves, snow leopards and cuons have decreased at the same time and gradually in those nature reserves.

The focus on the habitat needs of the panda has led to changes in ecosystems to the detriment of the rest of the species. These would be species that embody the needs of an entire ecosystem and therefore are expected to act as shortcuts for conservation action. In short, by solving one problem many others have been created.