Jeff.Johnson
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pere-grine.bsky.social
Jeff.Johnson
@pere-grine.bsky.social
40 followers 59 following 3 posts
Human; Senior Scientist at @theperegrinefund.bsky.social
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Reposted by Jeff.Johnson
wpmueller.bsky.social
#ornithology
#RaptorResearch
www.audubon.org/magazine/why...
Why Are Peregrine Falcon Numbers Falling in the United States Again?
In a decline not seen since the DDT era, the spectacular raptors have noticeably decreased in numbers over the past two years. Some concerned experts believe avian flu is to blame.
www.audubon.org
February 28, 2025 at 4:55 PM
pere-grine.bsky.social
Worth a watch and share if so inclined — peregrinefund.org/lead-it-go #conservation
Lead it Go | The Peregrine Fund
peregrinefund.org
February 25, 2025 at 5:19 PM
pere-grine.bsky.social
“a compendium of factual information regarding Ne that is designed as a one-stop, handy reference guide for interested users” … thank you Robin!

onlinelibrary.wiley.com/doi/10.1111/...
The Idiot's Guide to Effective Population Size
This is a reference manual for the elegant, yet hideously complex concept of effective population size (Ne), inspired by a classic, self-published manual of automotive repair ‘for the compleat idiot’....
onlinelibrary.wiley.com
February 14, 2025 at 4:49 AM
Reposted by Jeff.Johnson
cegrueber.bsky.social
Out now in @nature.com! Our comprehensive meta-analysis of global terrestrial and marine genetic diversity demonstrates rapid loss of genetic diversity and identifies conservation interventions that could mitigate this process
www.nature.com/articles/s41...
🧪🌍🦤🧬
#consgen #PopGen
Global meta-analysis shows action is needed to halt genetic diversity loss - Nature
A comprehensive meta-analysis of global terrestrial and marine genetic diversity covering more than three decades of research demonstrates rapid loss of genetic diversity and identifies conservation i...
www.nature.com
January 29, 2025 at 4:15 PM
Reposted by Jeff.Johnson
science.org
A single gene underlies male mating morphs in ruff sandpipers, a new Science study finds. The results show how evolutionary changes in a single gene's structure, sequence, and regulation can drive significant diversity within a single species.

Learn more in our new issue: https://scim.ag/4arzNmU
A breeding ruff male (Calidris pugnax) in alert posture scans the breeding area for mating opportunities at Liminka Bay, Finland. Ruff males deploy one of three mating tactics that differ in aggressive and courtship behaviors. Differences in aggression between tactics are tied to concentrations of circulating androgens, which are modulated by the actions of a single gene.
January 23, 2025 at 7:05 PM
Reposted by Jeff.Johnson
evolletters.bsky.social
Inbreeding depression is more severe in harsher environmental conditions, as shown in a wild population
doi.org/10.1093/evle...

Now in @evolletters.bsky.social by @annamhew.bsky.social et al.

📷: Anna Hewett
A photograph of two red deer standing on a rock. Both deer are looking at the camera, and the individual on the left is wearing a radio transmitting collar.
January 24, 2025 at 5:56 PM