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Video: researchers balance cow carcass:
Who has never dreamed of swinging something deep down, just to see? However, This is exactly what a Chinese team did in the Southern China Sea. Moreover, by carrying out an unusual experience: it dropped a cow carcass more than 1,600 meters deep, off the island province of Hainan, to observe what happens when a large animal dies in the abyss.
The objective? Moreover, Better understand the decomposition processes which follow the fall of a dead whale on the ocean floor. However, details an article from Iflscience. Therefore, To simulate this phenomenon, a cow carcass has been used. Similarly, What the researchers had not planned was the arrival of eight visitors as massive as they can be: Pacific. Similarly, dormants (or Somniosus pacificus). For example, And as scientists know your passion for the mysteries of the seabed, they have filmed everything.
The images captured by the underwater cameras reveal an unprecedented scene: eight sleepy sharks. all females, have taken turns around the carcass. It is the very first time that the species has been observed in this region of the globe. far from its usual territories that are the north of the Pacific, from Alaska to Japan, via California and even the Tonga pit. Their presence also in the south questions the evolution of their distribution area, perhaps influenced by climate change.
Unlike the classic image of a chaotic feast – video: researchers balance cow carcass we all have in mind the fate of the unfortunate cow. of Jurassic Park Descended in the Raptors enclosure – the Pacific sleepers were surprisingly civilized. Videos show disciplined behavior, individuals feeding giving way to those arriving behind them. Rare hierarchical behavior in large predators, which suggests a survival strategy adapted to group life, even in extreme depths.
Video: researchers balance cow carcass
An unexpected shark piponnière?
Another fascinating observation: sharks seem to retract their eyes while they eat. An absent movement in most of the other specimens of this family. which would actually be a gesture of protective, because they do not have a nictitating membrane (the famous “third eyelid” that can be found in cats, but also in certain sharks).
The videos also show the presence of parasites (like the small crustaceans called copépods) on certain sharks. a phenomenon already documented in their cousins in Greenland. Other species, such as light fish video: researchers balance cow carcass and many amphipods of the great funds, also took advantage of the improvised banquet.
The discovery of these sleeping sharks in the Southern China Sea raises many questions: is it a recent extension of their distribution area. or had they simply gone unnoticed so far? What do these giants eat in the depths when man is not there to serve them cow carcasses? Could the region serve as a “nursery” for females, as is the case for other species of large sharks?
The researchers hope that these unpublished images will make it possible to better understand the biology. ecology of these discreet predators, whose survival is threatened by fishing and climate upheavals. The study. published in the journal Ocean-Landmosphere Research, marks a major advance in the knowledge of abyssal life, still too little known.
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Video: researchers balance cow video: researchers balance cow carcass carcass
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