Hypersalinity drives convergent bone mass increases in Miocene marine mammals from the Paratethys
Alexandra Houssaye cs 2022 Curr.Biol.32:R42-R44
doi org/10.1016/j.cub.2021.10.065
• Miocene marine mammals from the Para-tethys Sea often have highly compact bones.
• Dense bones evolved independently in Para-tethyan whales, dolphins & seals. >• Bone mass increase may have begun as an adaptation to regional hyper-salinity.
• Para-tethyan marine mammals persisted, despite being isolated from the world ocean.
Pachy-osteo-sclerosis (POS creates dense, bulky bones) often characterizes the early evolution of secondarily aquatic tetrapods (whales, dolphins), but then usu.fades away, as swimming efficiency increases.
Here, we document a remarkable reversal of this pattern: the convergent re-emergence of bone densification in Miocene seals, dolphins & whales from the epi-continental Paratethys Sea (E-Europe, C-Asia).
This phenomenon was driven by imbalanced remodeling & inhibited resorption of primary trabeculae,
it coincided with hyper-saline conditions (the Badenian salinity crisis) that affected the C-Paratethys 13.8-13.4 Ma.
Dense bones acting as ballast would have facilitated efficient swimming in the denser & more buoyant water, and hence were likely adaptive in this setting.
From the C-Paratethys, POS subsequently spread E.ward, where it became a defining feature of the endemic late-Miocene whale assemblage.
Pleistocene H.erectus also evolved POS: apparently, they were slow+shallow divers for sessile seafoods, probably mostly shellfish:
- DHA & larger brain,
- stone tool use,
- shellfish engravings google "Joordens Munro".
No Homo erectus fossil has ever been recovered from sediments that
indicate hypersaline marine conditions.
- DHA & larger brain,
- stone tool use,
I don't recall that stone tools are exclusive to marine exploitation.
Hypersalinity drives convergent bone mass increases in Miocene marine mammals from the Paratethys
Alexandra Houssaye cs 2022 Curr.Biol.32:R42-R44
doi org/10.1016/j.cub.2021.10.065
• Miocene marine mammals from the Para-tethys Sea often have highly compact bones.
• Dense bones evolved independently in Para-tethyan whales, dolphins & seals.
• Bone mass increase may have begun as an adaptation to regional hyper-salinity.
• Para-tethyan marine mammals persisted, despite being isolated from the world ocean.
Pachy-osteo-sclerosis (POS creates dense, bulky bones) often characterizes the early evolution of secondarily aquatic tetrapods (whales, dolphins), but then usu.fades away, as swimming efficiency increases.
Here, we document a remarkable reversal of this pattern: the convergent re-emergence of bone densification in Miocene seals, dolphins & whales from the epi-continental Paratethys Sea (E-Europe, C-Asia).
This phenomenon was driven by imbalanced remodeling & inhibited resorption of primary trabeculae,
it coincided with hyper-saline conditions (Badenian salinity crisis, C-Paratethys 13.8-13.4 Ma).
Dense bones acting as ballast would have facilitated efficient swimming in the denser & more buoyant water, and hence were likely adaptive in this setting.
From the C-Paratethys, POS subsequently spread E.ward, where it became a defining feature of the endemic late-Miocene whale assemblage.
So there is a correlation between hypersalinity and POS in known
marine mammals, cetaceans and pinnipeds. So far so good.
Pleistocene H.erectus also evolved POS: apparently, they were slow+shallow divers for sessile seafoods, probably mostly shellfish:
No Homo erectus fossil has ever been recovered from sediments that
indicate hypersaline marine conditions.
- DHA & larger brain,
- stone tool use,
I don't recall that stone tools are exclusive to marine exploitation.
Early Oldowan tools suggest animal butchery in a freshwater
environment:
https://www.science.org/doi/10.1126/science.abo7452
- shellfish engravings google "Joordens Munro"."we found evidence for freshwater shellfish consumption by hominins" https://www.researchgate.net/publication/269102248_Homo_Erectus_at_Trinil_on_Java_Used_Shells_for_Tool_Production_and_Engraving
That's not sea food.
Hypersalinity drives convergent bone mass increases in Miocene marine mammals from the Paratethys
Alexandra Houssaye cs 2022 Curr.Biol.32:R42-R44
doi org/10.1016/j.cub.2021.10.065
• Miocene marine mammals from the Para-tethys Sea often have highly compact bones.
• Dense bones evolved independently in Para-tethyan whales, dolphins & seals.
• Bone mass increase may have begun as an adaptation to regional hyper-salinity.
• Para-tethyan marine mammals persisted, despite being isolated from the world ocean.
Pachy-osteo-sclerosis (POS creates dense, bulky bones) often characterizes the early evolution of secondarily aquatic tetrapods (whales, dolphins), but then usu.fades away, as swimming efficiency increases.
Here, we document a remarkable reversal of this pattern: the convergent re-emergence of bone densification in Miocene seals, dolphins & whales from the epi-continental Paratethys Sea (E-Europe, C-Asia).
This phenomenon was driven by imbalanced remodeling & inhibited resorption of primary trabeculae,
it coincided with hyper-saline conditions (Badenian salinity crisis, C-Paratethys 13.8-13.4 Ma).
Dense bones acting as ballast would have facilitated efficient swimming in the denser & more buoyant water, and hence were likely adaptive in this setting.
From the C-Paratethys, POS subsequently spread E.ward, where it became a defining feature of the endemic late-Miocene whale assemblage.
So there is a correlation between hypersalinity and POS in known
marine mammals, cetaceans and pinnipeds. So far so good.
Good boy, you're improving... :-)
Pleistocene H.erectus also evolved POS: apparently, they were slow+shallow divers for sessile seafoods, probably mostly shellfish:
No Homo erectus fossil has ever been recovered from sediments that
indicate hypersaline marine conditions.
:-D Making up your own nonsense, my little boy?? <inform a bit before speaking,
e.g. José Joordens 2011 "The power of place" Free Univ.A'dam.
- DHA & larger brain,
- stone tool use,
I don't recall that stone tools are exclusive to marine exploitation.
Early Oldowan tools suggest animal butchery in a freshwater
environment:
https://www.science.org/doi/10.1126/science.abo7452
Yes, thanks, my little boy, again:
we're saying:
our ancestors spread along the seas & from the coasts followed therviers inlands.
Perhaps too difficult for ouw boy?
- shellfish engravings google "Joordens Munro"."we found evidence for freshwater shellfish consumption by hominins"
https://www.researchgate.net/publication/269102248_Homo_Erectus_at_Trinil_on_Java_Used_Shells_for_Tool_Production_and_Engraving
That's not sea food.
:-DDD
Now the kudu runner want us to believe shells grow in his savanna... :-DDD
Hypersalinity drives convergent bone mass increases in Miocene marine mammals from the Paratethys
Alexandra Houssaye cs 2022 Curr.Biol.32:R42-R44
doi org/10.1016/j.cub.2021.10.065
• Miocene marine mammals from the Para-tethys Sea often have highly compact bones.
• Dense bones evolved independently in Para-tethyan whales, dolphins & seals.
• Bone mass increase may have begun as an adaptation to regional hyper-salinity.
• Para-tethyan marine mammals persisted, despite being isolated from the world ocean.
Pachy-osteo-sclerosis (POS creates dense, bulky bones) often characterizes the early evolution of secondarily aquatic tetrapods (whales, dolphins), but then usu.fades away, as swimming efficiency increases.
Here, we document a remarkable reversal of this pattern: the convergent re-emergence of bone densification in Miocene seals, dolphins & whales from the epi-continental Paratethys Sea (E-Europe, C-Asia).
This phenomenon was driven by imbalanced remodeling & inhibited resorption of primary trabeculae,
it coincided with hyper-saline conditions (Badenian salinity crisis, C-Paratethys 13.8-13.4 Ma).
Dense bones acting as ballast would have facilitated efficient swimming in the denser & more buoyant water, and hence were likely adaptive in this setting.
From the C-Paratethys, POS subsequently spread E.ward, where it became a defining feature of the endemic late-Miocene whale assemblage.
So there is a correlation between hypersalinity and POS in known
marine mammals, cetaceans and pinnipeds. So far so good.
Good boy, you're improving... :-)
Of course cetaceans and pinnipeds also show a lot of other distinctly aquatic adaptations that makes them immediately recognizable as such. Pleistocene Homo erectus didn't have flippers.
Pleistocene H.erectus also evolved POS: apparently, they were slow+shallow divers for sessile seafoods, probably mostly shellfish:
No Homo erectus fossil has ever been recovered from sediments that
indicate hypersaline marine conditions.
:-D Making up your own nonsense, my little boy?? Inform a bit before speaking,
e.g. José Joordens 2011 "The power of place" Free Univ.A'dam.
Name one specimen of Homo erectus/ergaster that was recovered from
marine sediments.
- DHA & larger brain,
- stone tool use,
I don't recall that stone tools are exclusive to marine exploitation.
Early Oldowan tools suggest animal butchery in a freshwater
environment:
https://www.science.org/doi/10.1126/science.abo7452
Yes, thanks, my little boy, again:
we're saying:
our ancestors spread along the seas & from the coasts followed therviers inlands.
Perhaps too difficult for our boy?
Too speculative.
So there is a correlation between hypersalinity and POS in known
marine mammals, cetaceans and pinnipeds. So far so good.
Good boy, you're improving... :-)
Of course cetaceans and pinnipeds also show a lot of other distinctly
aquatic adaptations that makes them immediately recognizable as such.
Pleistocene Homo erectus didn't have flippers.
Only incredible imbeciles believe flat feet are for running.
Aquarboreal, my little boy!
Pleistocene H.erectus also evolved POS: apparently, they were slow+shallow divers for sessile seafoods, probably mostly shellfish:
No Homo erectus fossil has ever been recovered from sediments that
indicate hypersaline marine conditions.
:-D Making up your own nonsense, my little boy?? Inform a bit before speaking,
e.g. José Joordens 2011 "The power of place" Free Univ.A'dam.
Name one specimen of Homo erectus/ergaster that was recovered from
marine sediments.
Too lazy to look it, my little boy?
It's your problem, not mine:
e.g. José Joordens 2011 "The power of place" Free Univ.A'dam.
Never heard of Mojokerto, my little boy?? ever heard of barnacles?? corals??
Never heard of Sangiran (skull 17)??
Again, the human foot is not flat,
Kudu runner:
Again, the human foot is not flat,
:-DDD
The savanna fantasts become more+more ridiculous:
Ever seen a horse or dog foot, my little boy?
Ever heard of digitigrady?? unguligrady?? plantigrady??
Again, the human foot is not flat,
:-DDD The savanna fantasts become more+more ridiculous:
Ever seen a horse or dog foot, my little boy?
Are they bipedal primates?
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 302 |
| Nodes: | 16 (0 / 16) |
| Uptime: | 96:49:09 |
| Calls: | 6,764 |
| Calls today: | 2 |
| Files: | 12,295 |
| Messages: | 5,376,370 |
| Posted today: | 1 |
