I'm so excited to talk about "Careers for Evolutionary Social Scientists: Alternatives to the Academic Job Market" at the EP pre-conference at #SPSP with Kevin Rosenfield. Who is going? And do you have any specific Qs you want us to chat about?
Follow
Click to Follow nm_grebe
Nicholas Grebe
@nm_grebe
Research Fellow, Anthropology at UMich. Hormones, behavior, open science, pictures of primates
Nicholas Grebe’s Tweets
Six days until the deadline for abstract submission AND subsidy application for the Evolutionary Psychology preconference at #SPSP2023 (November 15th)! Submit (with this gibbon's encouragement) at ep2023.mystrikingly.com
Quote Tweet
Friends and colleagues! Registration & abstract submission is OPEN for the Evolutionary Psychology Preconference at #SPSP2023. Deadline: November 15 to submit abstracts for data blitz/posters *and* for ECRs to apply for registration subsidies. Much more at ep2023.mystrikingly.com
Show this thread
10
12
Hamilton’s force of selection before maturity: New preprint!
Here I show that, rather than remaining constant, the force of selection generally increases before maturity for as long as offspring depend on their parent!
A brief thread 1/9
1
22
92
Show this thread
2023 Evolutionary Psychology Preconference at SPSP accepting submissions until November 15th. Offering need-based registration subsidies to offset the cost of attending the preconference for students and early career scholars (sponsored by HBES)
3
4
And now for a presentation by our esteemed hosts. Dr. Nick Grebe tells us about some of the promises and pitfalls of a few noninvasive physiological biomarkers with utility for wild ape studies. #MPIG2022
2
4
31
Show this thread
Happy to be able to share a new publication!
We explore a photogrammetry device made from parts purchased online and use it with wild Bornean orangutans. Thank you to everyone who helped with this!!
library-wiley-com.proxy.lib.umich.edu/doi/10.1002/aj
3
9
19
September #SORTEEvoices:
Signe White: sortee.org/blog/2022/09/0
Tina Heger: sortee.org/blog/2022/09/1
Nicholas Grebe: sortee.org/blog/2022/09/1
William Gearty: sortee.org/blog/2022/09/2
read image description
ALT
3
8
Breaking via BBC Persian
Iranian sport climber Elnaz Rekabi who competed without the Islamic headscarf at the International Federation of Sport Climbing's Asian Championships in Seoul on Sunday has gone missing.
Quote Tweet
In a historic move, Iranian athlete Elnaz Rekabi who represented Iran at the Asian Climbing Competitions finals in Seoul, competed without hijab, disobeying the Islamic Republic's restrictions for female athletes.
Show this thread
0:44
6.8M views
771
50.2K
158.8K
Show this thread
Thanks to for generously agreeing to help subsidize ECR registration costs: ep2023.mystrikingly.com/#registration-
This precon is always the best part of the SPSP experience for me. Hope to see you in Atlanta!
2
4
Show this thread
and I are excited to be organizing the precon--reach out w/ questions. Our illustrious group of invited speakers this year includes:
Leda Cosmides
Jeff Simpson
Eric Pedersen
2
5
8
Show this thread
Friends and colleagues! Registration & abstract submission is OPEN for the Evolutionary Psychology Preconference at #SPSP2023. Deadline: November 15 to submit abstracts for data blitz/posters *and* for ECRs to apply for registration subsidies. Much more at
1
4
5
Show this thread
But now, I can finally tell you all about it, I can stop chasing down lemurs, and I can share thrilling footage from many, many hours of watching them--like Anhotep here chasing, drooling on, and eventually eating a bug. Fin.
0:37
42 views
1
3
Show this thread
I'm super proud of this one. This project took several years of grant writing, discussing how to make things work w/ endangered lemurs, cold emailing zoo after zoo when I needed more lemurs, freaking out that COVID would ruin everything, collecting data in three countries, & more
1
1
3
Show this thread
These results raise all sorts of interesting questions re: confirmatory vs. exploratory analyses, the nature of monogamy in Eulemur, and the status of any sort of consensus in the field of OT research. Turns out Eulemur is full of OT-related surprises!
Quote Tweet
2): Surprisingly, we don’t see evidence of a pair-bond circuit akin to previous studies. Eulemur shows widespread inter-individual variation, unrelated to mating system. Non-traditional species can surprise us & challenge existing assumptions re: biological signatures of monogamy
Show this thread
read image description
ALT
1
Show this thread
BUT, when we explored alternative patterns afforded by our design, we noticed something interesting: blocking one monogamous lemur's OT didn't seem sufficient to change pair behavior, though blocking OT in both lemurs, at the same time, perhaps was! Maybe partner compensation?
1
Show this thread
A number of our findings differed from other monogamous primates/rodents. Mating system didn't predict baseline rates of pair affiliation (unlike voles), and blocking one monogamous lemur's OT didn't change grooming/huddling in that pair (unlike e.g. marmosets)--quelle surprise!
read image description
ALT
1
Show this thread
(How did we temporarily, non-invasively block OT? With an oral antagonist. I spent many hours watching these pairs during trials to make sure there weren't any side effects. Closest thing I noticed was certain participants got overly accustomed to liberal servings of treats.)
read image description
ALT
1
1
Show this thread
Addressing these issues will take a ton of work--more diverse comparative models, and methods reform, are two paths forward. That's what this study provides: a preregistered experiment of OT modulation in pairs of Eulemur (the only primate genus w/ monogamous & non-mono spp.)
read image description
ALT
1
1
Show this thread
The story of how oxytocin (OT) mediates sexual pair-bonding relies on 1) classic vole studies and 2) an avalanche of human psych studies. And now both areas are fending off roughly a million challenges:
doi.org/10.1101/2022.0
doi.org/10.1177/174569
figure:
read image description
ALT
1
2
Show this thread
Back to lemurs! After a seriously long haul (story at the end), I'm proud to present our latest work on oxytocin and mating systems in the Eulemur genus:
3
7
22
Show this thread
There were 45 gorillas all in one place! Thankfully the interaction ended with no consequences and even some of the juveniles were playing together! Amazing!! #mountaingorillas #nature #conservation
0:24
5.1K views
20
175
584
Show this thread
Pleased to share the published version of this paper on mountain gorilla sibling relationships, now online ! doi.org/10.7554/eLife.
See the thread below for a summary and some pretty pictures:
Quote Tweet
my first preprint with @stacylrosenbaum and some wonderful folks @SavingGorillas. What began as a modest analysis of a couple years of data turned into a much larger project: providing the best possible information on the dynamics of mountain gorilla sibling relationships 1/ twitter.com/stacylrosenbau…Show this thread
read image description
ALT
1
17
43
A reminder that the abstract submission deadline for the 2022 meeting is tomorrow, Sep 16, @ 12am CST! We hope you can join us for what promises to be a fun and interesting meeting.
1
15
21
Show this thread
🚨EXCLUSIVE: Yvon Chouinard, who founded the outdoor apparel maker Patagonia and became a reluctant billionaire with his unconventional spin on capitalism, has given away the company. All Patagonia’s profits will now be used to fight climate change.🧵
1,537
30.3K
121.5K
Show this thread
I wrote a thing on the evolution of behavior. 🧵(1/x) on Evolutionary Endocrinology and the Problem of Darwin’s Tangled Bank.
Free for a month here
2
12
39
Show this thread
Check out our new preprint, "Primate social organization evolved from a flexible pair-living ancestor", in collaboration with , @CarstenSchradin, , and other colleagues, now up on the bioRxiv. biorxiv.org/content/10.110
3
58
133
Well this is something.
Quote Tweet
Oxytocin receptor is not required for social attachment in prairie voles biorxiv.org/cgi/content/sh #bioRxiv
6
As nice as it is to see "number gets bigger" at journals I support, these lessons should always be forefront:
Quote Tweet
1/n Okay, I've now seen multiple tweets lauding Clarivates newly released Impact Factors for specific journals. Can we just stop with the IF madness? There's so much wrong with focusing on these, and as scientists we should just reject them. Why?
Show this thread
2
Postscript: I had a sensible chuckle when twitter asked me if I wanted to read my paper before tweeting about it.
7
Show this thread
For much more, see our OSF page (osf.io/6qgj5/). I'm so lucky and proud to have worked on this paper & shared it with staff in Rwanda who make projects like this possible--more on that soon! For now, here's a little gorilla picture, as a treat 6/6
read image description
ALT
1
9
Show this thread
This tidy explanation is complicated by aggression patterns, which clearly suggest paternal sibs CAN recognize each other. They don't affiliate like other sibs & they don't really avoid mating w/ each other (sup ), but they avoid aggression. We're not sure why! 5/
1
3
Show this thread
A lack of bias towards paternal sibs might suggest mountain gorillas can't recognize or don't discriminate towards them. Maybe there's a mismatch b/w mechanisms fitting historical social structure (polygynous one-male units) vs. current ones (often multimale). Plausible, BUT 4/
1
1
Show this thread
Across multiple measures, maternal & full sibs affiliate more than paternal sibs & non-sibs. F-F pairs groom more & play less; M-M pairs vice versa; F-M pairs are intermediate. Familiarity AND relatedness each seem important for explaining these patterns 3/
1
1
2
Show this thread
There aren't many primates where full & half-sibs, whether same or opposite-sex, all have a good chance of interacting across the lifespan. Humans are one; mountain gorillas another. We aggregated (& cleaned & wrangled & cleaned again) data from ~700 sib and 1300 non-sib pairs 2/
1
4
Show this thread
🥳my first preprint with and some wonderful folks . What began as a modest analysis of a couple years of data turned into a much larger project: providing the best possible information on the dynamics of mountain gorilla sibling relationships 1/
read image description
ALT
Quote Tweet
Excited to share this preprint, led by @nm_grebe and w/ @SavingGorillas coauthors, on sibling relationships in mountain gorillas. 14 yrs, 40k(!) hrs behavioral data show strong maternal sib preference, a bit of a mystery given their social/mating system: biorxiv.org/content/10.110
1
8
30
Show this thread
“Brain charts for the human lifespan” now out in : nature.com/articles/s4158 Celebrating the result of 200+ people putting their 🧠🧠🧠together (120,000+ of them!) to brain charts across the lifespan. With
GIF
read image description
ALT
17
158
404
Show this thread
Really important point here: Yes, SAT scores are correlated with SES, but *so is everything else.*
Featuring a quote from this paper by and colleagues: science.org/doi/10.1126/sc
8
52
358
Show this thread
Super grateful to get funding from for my project "Darwinizing the love hormone: An evolutionary perspective on the human oxytocin system" - I'll soon be hiring two PhD students! Official ad to follow, but please spread the word and get in touch! Brief synopsis in thread
11
66
208
Show this thread
📢New preprint alert 🚨:
What are oxytocin assays measuring? Epitope mapping, metabolites, and comparisons of wildtype & knockout mouse urine.
biorxiv.org/content/10.110
#Oxytocin #Immunoassay #MethodsDevelopment #ELISA #Endocrinology #Preprint
read image description
ALT
1
18
33
Show this thread
This new article by Farina and Gibbons provides evidence of supportive correspondence between Wilson and Rushton (h/t ):
magazine.scienceforthepeople.org/online/the-las
3
3
11