Madeline Eppley

@madeline-eppley.bsky.social

phd candidate at northeastern university’s marine science center 🌊🌎 marine pop gen, conservation, disease ecology, and lots of 🦪 {currently looking for a postdoc!} https://linktr.ee/madelineeppley 🦈🏳️‍🌈🦀

As everyone's winding down on #evol2026 we want to share our survey link with you again. Whether you work in reproductive biology specifically or not, please take a minute to help us understand how the scientific community uses reproductive terms in research! And hope to see you at #SMBE!

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In our Viewpoint (onlinelibrary.wiley.com/doi/abs/10.1...) we synthesize the gametic definition (outlined by Janicke et al below) and other definitions of sex (e.g., multivariate definition). We contend that is NO consensus on “biological sex” (maybe a consensus isn’t actually necessary…)

There is No Consensus on Biological Sex

At this critical moment when misinformation about sex is being applied to policy globally, scientific clarification on the definition of biological sex is valuable. Here, we evaluate the primary appr...

onlinelibrary.wiley.com

Tim Janicke@timjanicke.bsky.social · 4w ago

In a new #Viewpoint we argue that the binary definition of #BiologicalSex based on gamete size is a scientifically robust framework that is entirely compatible with the diversity of sexual phenotypes and human gender identities. onlinelibrary.wiley.com/doi/10.1111/...

My coauthor Jay Falk's postdoctoral fellowship was terminated by the Trump administration for documenting the hummingbird example in this paper.

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Operational biological sex definitions applied to hummingbirds (Bleiweiss 1992; Bleiweiss 1999; Bleiweiss 2001; Diamant et al. 2021; Falk et al. 2022; Falk et al. 2021) where sex is operationally defined by binary plumage phenotypes in the field. Each row depicts a wild individual hummingbird with morphological traits (beak length, plumage coloration), behavioural traits (territoriality) and their unobserved gamete type. This example illustrates how the same individual can be operationally defined as one sex in the field (based on external phenotypes) but classified as a different sex based on their gametes (which cannot be easily observed in the field), highlighting how definitional choices shape scientific reporting of sex.
Andy Lee, PhD@andylee.bsky.social · 4w ago

In our Viewpoint (onlinelibrary.wiley.com/doi/abs/10.1...) we synthesize the gametic definition (outlined by Janicke et al below) and other definitions of sex (e.g., multivariate definition). We contend that is NO consensus on “biological sex” (maybe a consensus isn’t actually necessary…)

Let biological sex be multifaceted, as all biology is. And when you need to be precise in scientific research, be precise. Say ‘gametic sex’ or ‘chromosomal sex’ or ‘anatomical sex’, or whatever is appropriate to your own work.

I’m presenting a poster on two (!) chapters of my PhD at #Evol2026 Drop by C-03 tomorrow (6/21) to chat with me about eastern oyster pop gen and genetic strategies of parasite mitigation. 🦪🦠 I’m also on the lookout for a postdoc 👀 and would love to connect with anyone about a potential good fit!

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This one hits home to the Polar Programs community.... "NSF continues to offer fellowship opportunities ...in the fields of engineering, entrepreneurial research, mathematics and physical sciences. ..postdocs in biology are available only if they involve the use of artificial intelligence." 🧪🌎🇦🇶🌊

NSF Eliminates Geoscience Postdocs - Eos

The National Science Foundation (NSF) has eliminated its postdoctoral fellowship funding for Earth scientists.

eos.org

How connected are we to nature? A new report featuring research from Professors Brian Helmuth and John Coley explores how our relationship with nature impacts biodiversity and decision-making. Our choices matter more than we think. 🧪 Read more: https://bit.ly/4dr5Zc2 #COSConnects #MarineScience

Nature report links wildlife trends to human well-being

Northeastern scientists led a chapter on why the human connection to nature is important for the future of the planet.

bit.ly

Not all heroes wear capes, some are simply mollusks. 🦪 Dive below the surface of oyster restoration with Brianna and Kelsey from @nature.org on this month’s #TimeAndTide podcast episode! 🎧 Listen wherever you get your podcasts! 📷: Nate Gruen from PREP, highlighting a healthy NH oyster reefs.

Surprised to learn scientists can't agree on a definition of sex? Don't be! To be honest, we can't even agree on a definition of species. Many so-called natural categories are hard to define once we look at the evidence. Biology is too complex for simple definitions, which is a feature, not a bug.

Jeremy Yoder says no war@jbyoder.org · 4mo ago

"The fact that there is no current consensus of biological sex is not antithetical to science... However, the field urgently needs an ethical and reproducible approach for discussing sex" There is No Consensus on Biological Sex