After a poor winter in the sea, female Magellanic penguins experience greater than men, inning accordance with a brand-new study.
Every fall in the Southerly Hemisphere, Magellanic penguins leave their seaside nesting websites in Southern America. For grownups, their summer task—breeding, or at the very least attempting to—is complete. Recently fledged chicks and grownups slowly
going
bent on sea to invest the winter feeding. They will not go back to land until springtime.
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Yet life for these birds when they winter offshore is mostly a mystery to the researchers that study Magellanic penguins—and that supporter for their preservation amidst decreasing populace numbers."The winter duration is something of a black box for us in regards to understanding Magellanic penguins," says study coauthor Ginger Rebstock, a College of Washington research researcher. "We understand the the very least quantity about this component of their year."
But scientists are beginning to tear open up that black box and discover how Magellanic penguins from one nesting website, Punta Tombo in Argentina, fare throughout the winter season.
In a paper released in the journal Aquatic Ecology Progress Collection, they record that the Río de la Plata—which drains pipes Southern America's second-largest river system after the Amazon—strongly influences oceanographic problems in the Magellanic penguins' winter feeding waters. Those oceanographic features, they record, show up in the body problems of Magellanic penguin women, but not men, when the penguins go back to their nesting premises in springtime.
OCEAN ROAMING
"Scientists just reach study the penguins up close—monitor their biology, their health and wellness, their populace numbers—for the once in the year that they come to nesting websites such as Punta Tombo to breed," says Rebstock. "Previously, we have not really known how problems out in the sea, where they invest the whole winter, affect them."
Researchers think Magellanic penguins swim numerous miles in winter to feed upon fish such as anchovy and sardines. For penguins coming from at Punta Tombo, this could imply swimming greater than 1,000 miles north along the coast up to southerly Brazil. They typically stay along the continental rack in waters usually no greater than about 650 feet deep.
