Mallorca-Regatta: Erneut Orca-Zwischenfall mit Segelboot
Immer wieder gehen Orcas vor der iberischen Küste Boote an und beschädigen sie - nun musste ein weiteres Teilnehmerschiff der Mallorca-Regatta abgeschleppt werden. Forschern geben die Vorfälle Rätsel auf.
My friend Lauren Brent and her colleagues have published a paper on the #evolution of #menopause and maternal investment in #orcas, in the latest issue of #CurrentBiology. I'm really excited to read this research! They're addressing an important and long-standing question in #EvolutionaryBiology. And it's #OpenAccess.
Actual economist in NBER paper: “We find consistent evidence that vessel noise pollution from international shipping has lowered fertility and raised the mortality of the SRKW [Orcas] significantly. Had noise pollution remained at its pre-1998 levels, the SRKW population would be 30% larger. Noise pollution is a growing threat to marine mammals worldwide.” https://www.nber.org/papers/w31390
I reckon these #orcas are trying to get our attention about something...
"Hey you lot up there! clunk Wouldn't happen to know anything about this whole water heating up thing would ye? clunk Planning on, eh, y'know, doing anything about it!? clunk-clunk Cos we've all unanimously agreed; it's not clunk us clunk that caused it!!! clunk-clunk-clunk"
"#Orcas, Hoare says, will have a clear sense of what humans have done to their environment. As demonstrated by the actions of #WhiteGladis, #OrcaSociety is #matriarchal, and females can live to 100: 'They will have a memory, almost a generational memory, of a time when the #ocean was not dominated by human beings"
Y'all remember the orcas attacking ships lately? I turned it into a video #game 😁 control the #orca, swim through the #ocean sink ships, but don't hurt the fish!
Obviously orcas are NOT our friends. Why would they be?
Humans capture and imprison orcas. Humans also capture and imprison dolphins, and have killed them by the thousands while hunting for tuna. Plus, during the last two centuries, humans have murdered more than a million whales, a close relative of orcas.
There have been many documented social trends amongst orcas, but we're here to discuss the greatest one: salmon hats.
Back in 1987, one orca from a group known as the Southern Residents began swimming with a dead salmon on its head. The female orca was part of the K pod in the Pacific Northwest's Puget Sound.
Within weeks, individuals within ALL THREE pods in the area were observed sporting veils of dead salmon. The behavior didn't seem to serve much of a function other than the whales apparently found it very entertaining.
Then, just as suddenly as it began, the salmon hats went out of fashion. The behavior had ceased the following summer.