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mrsroygbiv.bsky.social
@mrsroygbiv.bsky.social
17 followers 73 following 120 posts
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fervillanea.bsky.social
Though the puma didn't come out on top here, the species' resilience is unquestionable! Genetic analyses from Onorato et al. show a 20x increase in effective pop size and reduced signs of inbreeding in FL pumas after genetic rescue from Texas pumas. www.nature.com/articles/s41... #2025MMM #RIP
Estimates of the range-wide population size of adult and subadult Florida panthers from 1981 to 2020 using: (1) the 95% lower confidence interval of the motor vehicle mortality (MVM) model-averaged abundance estimate plotted in blue for the period 2000–2018 (2) the minimum population count (MPC) plotted in orange, for the period 1981–2015; (3) and the integrated population model plotted in grey, for the period 1982–2020. The year in which genetic rescue was initiated (1995) coincides with the subsequent increase in the population size that was documented by all three metrics.
April 3, 2025 at 1:11 AM
Reposted
jesspopescu.bsky.social
#2025MMM CHAMPIONSHIP
EMOJI BATTLE

🐻‍❄️🆚😼:🌋🧊/🪨↔️🪨/😼🪄😤
🐻‍❄️🪄👀/😼🤫🐾/😼😤🔜
🐻‍❄️🩼🦌/🐻‍❄️🦌🏞️/🐻‍❄️🔪🦌
😼🛬🦌/😼🦷🦌/🐻‍❄️🩼↪️
😼🩸🔊/🐻‍❄️🔉/😼🔪🦌/😼➡️
🐻‍❄️🔊/🐻‍❄️🧍🏻🦌/🐻‍❄️🦷🦌/😼🛫
😼🏃🏽‍♂️‍➡️👋🏽/🐻‍❄️🍽️🦌/🐻‍❄️🛡️🦊
🏆🐻‍❄️
April 3, 2025 at 1:12 AM
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mammalssuck.bsky.social
THANK YOU EVERYONE for another INCREDIBLE MARCH MAMMAL MADNESS! #2025MMM

Please help defend the Arctic and protect Polar Bears!

www.defendthearctic.org
a polar bear with its mouth open and teeth showing
ALT: a polar bear with its mouth open and teeth showing
media.tenor.com
April 3, 2025 at 1:15 AM
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mmmletsgo.bsky.social
#2025MMM CHAMPION: POLAR BEAR

Thank you so much for following along, and we can't wait to see you next year for #2026MMM!

Remember: if you're learning, you're winning!
April 3, 2025 at 1:20 AM
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fervillanea.bsky.social
Oh look, #2025MMM is almost over and *gasp* surprise, a carnivore is going to win 🙄. Again 😑. And I'm not saying there's a #conspiracyoflemurs there, I am willing to believe an order that evolved to eat other animals will do well at MMM @mmmletsgo.bsky.social - I think there's a deeper problem, a 🧵
April 2, 2025 at 1:06 AM
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mammalssuck.bsky.social
Are you ready? #2025MMM
a man wearing a top hat and a red jacket is standing in front of a crowd .
Alt: a man wearing a top hat and a red jacket is standing back stage getting ready to START THE BIG SHOW!
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April 3, 2025 at 12:01 AM
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fervillanea.bsky.social
Reductions in genetic diversity have been correlated w/ reduced fitness (reproductive output & lifespan) in several puma pops in FL and CA. These declines are often associated w/ physical defects like kinked tails, sperm defects, & other cardiac abnormalities. www.cell.com/current-biol... #2025MMM
Image from http://edis.ifas.ufl.edu/ issue on Florida Panthers, credit to Florida Fish and Wildlife Conservation Commission. The kinked tail of a Florida panther on the left, and an x-ray of a kinked tail on the right.
April 3, 2025 at 12:26 AM
Reposted
fervillanea.bsky.social
Microsatellites + SNPs + field data reveal a pedigree up to 6 generations for 4,449 polar bears in western Hudson Bay, Canada! It suggests that these polar bears rarely breed w/close relatives, occasionally have monozygotic twins, and sometimes adopt cubs! #2025MMM doi.org/10.1007/s00300-015-1871-0
Pedigree of 4,449 individual polar bears in western Hudson Bay, Canada. Each dot corresponds to an individual. Gray lines correspond to maternities and black lines correspond to paternities.
April 3, 2025 at 12:28 AM
Reposted
mammalssuck.bsky.social
The #2025MMM Championship Battle: PUMA (Puma concolor) vs POLAR BEAR (Ursus maritimus)! A BATTLE OF TWO HYPER-CARNIVORES!!!!
April 3, 2025 at 12:24 AM
Reposted
mammalssuck.bsky.social
AND YOU HAVE YOUR COMBATANTS HEADED TO THE #2025MMM CHAMPIONSHIP: PUMA & POLAR BEAR!!!!

WEDNESDAY WEDNESDAY WEDNESDAY!!!!

You'll pay zero dollars for the seat... AND ONLY USE THE EDGE!!!!

Come for the CARNAGE, GET STUCK WITH THE SCIENCE :-D
a monster truck is jumping in the air in front of a sign that says service
ALT: a monster truck is jumping in the air in front of a sign that says service
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April 1, 2025 at 1:18 AM
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jesspopescu.bsky.social
#2025MMM FINAL ROAR
EMOJI BATTLE RESULTS!

😼🆚🐒: 🌳🌰/😼👂🏼🐒
😼🛬🐒/😼🦷🐵/🐒🔊🦷
😼🙅🏽‍♂️🔪/🐒🌳/😼🐒🌿
🐒⬇️🌊/🐒🏃🏻‍➡️🌌/🏆😼

🐻‍❄️🆚🌳🍄‍🟫:🌊🕳️/🐻‍❄️🧐💨/🌊🍄‍🟫
🐻‍❄️🏊🏻🌊/🌳🔪🐻‍❄️/🐻‍❄️🔊🌊
🐻‍❄️😤/🐻‍❄️🌳➡️/🐻‍❄️🔪⏸️
🌳🌊🆘/🏆🐻‍❄️
April 1, 2025 at 1:17 AM
Reposted
lucasrocm.bsky.social
The genomes of Roots and Relicts help understand the evolution of sibling lineages. Wang et al 2016 looked at gene expression for ovules and leaves in Ginkgo and find common mechanisms in genes expressed in the ovule related to flowering genes in angiosperms #RIP #2025MMM doi.org/10.1007/s112...
Venn diagram of Gingko genes expressed uniquely in leafs (14679), uniquely in ovules (6310), or expressed in both (42149).
April 1, 2025 at 1:15 AM
Reposted
lucasrocm.bsky.social
Polar bears and brown bears are close relatives but have very different diets! Polar bears (which eat mostly seals) have fewer copies of the gene AMY1B (important in starch digestion!) relative to brown bears (which consume plants for >70% of their diet). #2025MMM doi.org/10.1073/pnas.1901093116
Genes with differences in copy number between polar bears and brown bears. (Lower panel) VST values, which estimate the proportion of population-level copy number variation due to differences between subpopulations in copy number variation, for all 21,142 genes in the polar bear genome. Dots are colored such that red dots correspond to genes with VST > 0.35 in two methods for copy number estimation, purple dots correspond to genes with VST <= 0.35 and VST > 0.22 in two methods for copy number estimation, blue dots correspond to VST > 0.22 in one method for copy number estimation and VST > 0.35 in the second method, and gray dots correspond to VST <= 0.22 in one or both copy number estimation methods. (Upper panel) Heat map of diploid gene copy number for genes (columns) whose copy number is highly differentiated between polar bears and brown bears (n=197 genes). Each row corresponds to individual polar bears (top set of rows), brown bears (middle set of rows), and black bears (bottom set of rows). Yellow corresponds to high copy number and black corresponds to a copy number of 0.
April 1, 2025 at 12:50 AM
Reposted
lucasrocm.bsky.social
Guo et al 2016 sequenced the ginkgo mitochondrial genomes to look at common features of gymnosperms. The Ginkgo mitogenome is relatively small, have low substitution rates, and possess numerous genes, introns, and edit sites; all present in the ancestral seed plant. doi.org/10.1093/molb... #2025MMM
Venn diagram depicting the numbers of shared and unique edit sites in three gymnosperm groups, Cycas, Ginkgo, and Welwitschia
April 1, 2025 at 12:46 AM
Reposted
mammalssuck.bsky.social
LAST UP: Ginkgo & Rhizzo #BestFriends (Ginkgo biloba & Rhizophagus aggregatus) vs. Polar Bear (Ursus maritimus) #2025MMM
A large ancient Ginkgo Tree with grey, crackled Bark and green leaves A large polar bear
April 1, 2025 at 12:41 AM
Reposted
lucasrocm.bsky.social
Should geladas be divided into 2 species? Chiou et al. found that Northern geladas (2n = 44) have a fission of chromosome 7 compared with Central geladas (2n = 42) & all other papionins! This may affect gene flow within geladas! #2025MMM #RIP doi.org/10.1038/s415...
Fig. 2 from Chiou et al. (2022) a, Apart from geladas, the papionin clade exhibits an extremely conserved karyotype of 42 diploid chromosomes. Twenty species with known karyotypes sampled by Stanyon et al.24 are shown with the consensus chronogram from TimeTree53,54. b, Hi-C contact map reveals a distinct lack of contacts between the arms of chromosome 7 in the reference gelada female. c, G-banded karyotyping and analysis of genomic rearrangements reveal strong synteny between fissioned chromosomes and the intact arms of chromosome 7 in central geladas and baboons, respectively. d, STRUCTURE-style bar plot showing ancestry proportions from 70 resequenced gelada genomes reveals two main populations differentiating northern (orange) and central (green) geladas. Zoo animals are of mainly central ancestry but two individuals with the highest levels of northern ancestry are also heterozygous for the centric fission characteristic of northern geladas.
April 1, 2025 at 12:35 AM
mrsroygbiv.bsky.social
👀 #mnapbio Unit 7 connection 👇 #2025MMM
ldurgavich.bsky.social Lara Durgavich @ldurgavich.bsky.social · Apr 1
Male-male combat among the cercopithecines has favored weapon-like upper canines that are basically MOUTH DAGGERS that sharpen against the honing lower premolar as Gelada males open & close their mouths! (Washburn 1996) #2025MMM
Illustration showing the "honing complex" of the upper canine/lower canine/premolar in a gelada.
April 1, 2025 at 12:25 AM
Reposted
lucasrocm.bsky.social
Caldon et al. (2024) sequenced genomes from the 3 major gelada pops (north, central & south) & found S pops have + pancreatic amylase gene copy #. More tuber consumption when grass is scarce may serve selection pressure for more efficient processing of starchy food! #2025MMM doi.org/10.1111/mec....
Figure 5b from Caldon et al. (2005) CNVs and amylase gene copy number. (b) Normalised genomic coverage over the two loci annotated as pancreatic amylase in geladas. Arrow added to point to the increased copy number of one (LOC112607926) of the two pancreatic amylase genes in southern geladas.
April 1, 2025 at 12:11 AM
Reposted
lucasrocm.bsky.social
Genome sequencing confirms that pumas colonized N. America from S. America ~100-300mya. However, fragmentation has left many N. American pops w/ low diversity and long ROH (signature of recent and severe inbreeding). #2025MMM www.nature.com/articles/s41...
a) Sliding window heterozygosity (black dots) and called ROH (runs of homozygosity) across a single scaffold for 3 pumas from 3 different populations (Big Cypress, Yellowstone, and Brazil) b) Average genome-wide heterozygosity versus the proportion of the genome in ROH c) Distribution of lengths of ROH. d) Heat map showing the percent of the genomes that are in ROH that are shared IBD (identity by descent) between pairs of pumas.
April 1, 2025 at 12:09 AM
mrsroygbiv.bsky.social
The puma is a #mnapbio fan fav to win #2025MMM Will it advance to the championship??
ldurgavich.bsky.social Lara Durgavich @ldurgavich.bsky.social · Apr 1
First Up: PUMA (Puma concolor) vs. GELADA (Theropithecus gelada) #2025MMM
Puma, looking off to the right Gelada, looking off to the left
April 1, 2025 at 12:12 AM
Reposted
mammalssuck.bsky.social
Tonight the FINAL ROAR of this 13th Tournament celebrating the TREE of LIFE on this last day of March www.youtube.com/watch?v=znFY... #2025MMM

(Imma wait for you to watch this video discovered by @tcastanea.bsky.social)
Weekend Update: John Belushi on March Weather - SNL
YouTube video by Saturday Night Live
www.youtube.com
April 1, 2025 at 12:01 AM
Reposted
mammalssuck.bsky.social
#2025MMM
a framed picture of a pirate with a parrot on his shoulder and the words arrrr you ready kids
ALT: a framed picture of a pirate with a parrot on his shoulder and the words arrrr you ready kids
media.tenor.com
March 31, 2025 at 11:59 PM
mrsroygbiv.bsky.social
Almost time for #2025MMM Final Roar!!
a woman is giving a thumbs up while sitting at a table .
ALT: a woman is giving a thumbs up while sitting at a table .
media.tenor.com
March 31, 2025 at 11:56 PM
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mammalssuck.bsky.social
AND YOU HAVE YOUR FINAL ROAR!!!
Ginkgo & Rhizzo #RootsAndRelicts,
Puma #TheOnlyOnes
Gelada #SameAndDifferent
AND Polar Bear #TuxedoStyle
#2025MMM
a lion standing on top of a rock with a cloudy sky behind it
Alt: a lion standing on top of a rock with a cloudy sky behind it with a mighty roar!
media.tenor.com
March 28, 2025 at 1:30 AM
Reposted
jesspopescu.bsky.social
#2025MMM ELITE TRAIT
EMOJI BATTLE RESULTS!

🌳🍄‍🟫🆚🐊:🌫️🏝️/🌳🫚🪨/🐊😵
🌳💥🐊/🦅🍽️🐊/🌳↔️/
🏆🌳🍄‍🟫

🦌🆚😼:🌳🌰/😼🤫🛫/🦌😤😱
🦌🌸🔄/😼🥱😴/🦌🏃🏽‍♂️‍➡️👋🏽/
🏆😼

☀️🆚🐒:🌋🏞️/☀️👀🐒/🐒☀️🧍🏻‍♂️
☀️🐒🔀/☀️🦶🏻🔥/☀️👇🏻😵/
🏆🐒

🐻‍❄️🆚🦄:🐻‍❄️🤔🍽️/☠️🦄🐻‍❄️/🌋🏞️
🦄🛑🏖️/🐻‍❄️🤔🦄/🐻‍❄️🍽️🦄/
🏆🐻‍❄️
March 28, 2025 at 1:28 AM