Chris Mull
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cgmull.bsky.social
Chris Mull
@cgmull.bsky.social
72 followers 71 following 14 posts
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Reposted by Chris Mull
nickdulvy.bsky.social
What’s driving the decline?

The crisis isn’t just fishing — it’s invisible fishing.

Much shark & ray catch is under-reported, aggregated, or mislabeled, masking real mortality & delaying management.

What we don’t measure, we don’t manage.

@cgmull.bsky.social
@nathanpacoureau.bsky.social
Taxonomic differentiation of catch. FAO (United Nations Food and Agricultural Organization) on the percentage of catch reported to the species level worldwide.
January 22, 2026 at 3:35 AM
Reposted by Chris Mull
nickdulvy.bsky.social
New paper out today in @natrevbiodiv.nature.com by the #GlobalSharkTrends team: Bending back the curve of shark & ray biodiversity loss;
Read the paper here: rdcu.be/eZ9n9
@sfu.ca
@sfubiosciences.bsky.social
@earth2ocean.bsky.social
Bending back the biodiversity loss curve of sharks and rays. The loss of sharks and rays to date has involved serial depletion of the largest, most evolutionary and functionally distinct species, and the increasing prevalence of smaller-bodied species that have benefited from release from predation.
January 22, 2026 at 3:35 AM
Reposted by Chris Mull
sharkcolin.bsky.social
New #sharkscience #sharkconservation
"Bending back the curve of shark and ray biodiversity loss" in @natrevbiodiv.nature.com
go.nature.com/4jXOnaC
What will it take to reverse shark biodiversity loss? Find out in our new article out today.
@nickdulvy.bsky.social @iucnshark.bsky.social
Bending back the curve of shark and ray biodiversity loss - Nature Reviews Biodiversity
Global shark and ray populations have declined sharply, driven by expanding fisheries and inequitable gaps in catch, trade and distribution data. This Review assesses global status, highlights drivers...
aus01.safelinks.protection.outlook.com
January 22, 2026 at 2:22 AM
Reposted by Chris Mull
afredston.bsky.social
in a week, I'll start reviewing applications for this postdoc. come work with me in Santa Cruz, CA on fitting Bayesian hierarchical models to whale tag and photo datasets.

position starts in fall 2026. ask me questions and apply here: recruit.ucsc.edu/JPF02003
Fredston Lab: Postdoctoral Scholar
University of California, Santa Cruz is hiring. Apply now!
recruit.ucsc.edu
December 9, 2025 at 7:24 PM
Reposted by Chris Mull
nathanpacoureau.bsky.social
Prêt·e à plonger dans la législation marine ? 🦈
Stage M2 : cartographie du cadre réglementaire français sur les requins, raies, et chimères.

Candidature & infos : tinyurl.com/2647um47

#StageM2 #BiologieMarine #Conservation #DroitDeLEnvironnement
Stage de Master 2 : Cartographie analytique des règles de conservation et gestion des requins et raies et chimères (chondrichtyens) en France - sfecologie.org
Contexte Les chondrichtyens — requins, raies et chimères — sont menacés par la pêche ciblée et les captures accidentelles (prises accessoires). Malgré les engagements pris au niveau national, européen...
tinyurl.com
November 13, 2025 at 6:47 PM
Reposted by Chris Mull
jagephart.bsky.social
The Blue Food Futures Fellowship application is now open!

Fellows receive 6 mo support at their home institution to address pressing issues in blue food + mentorship from a global blue research network + opportunities to present research at international fora

⬇️ More
bluefood.earth/fellowships/
Fellowships | BFFP
Blue Food Futures Fellows research critical questions about blue foods, filling knowledge gaps and providing actionable insights for global food and climate initiatives.
bluefood.earth
October 24, 2025 at 1:58 AM
Reposted by Chris Mull
afredston.bsky.social
POSTDOC JOB AD: I'm hiring a Bayesian ecologist to build a (IMO, extremely fun) model of humpback whale spatiotemporal dynamics in California

2-year position starting fall 2026. in-person in Santa Cruz; collab w with Mevin Hooten's lab at UT Austin.

ask me Qs or apply: recruit.ucsc.edu/JPF02003
Fredston Lab: Postdoctoral Scholar
University of California, Santa Cruz is hiring. Apply now!
recruit.ucsc.edu
October 22, 2025 at 5:14 PM
Reposted by Chris Mull
matiasbraccini.bsky.social
Several years in the making but we managed to assess the risk to the sustainability of all sharks and rays (>100 species) interacting with fisheries in Western Australia: spoiler, the vast majority of species are doing well!
onlinelibrary.wiley.com/doi/10.1111/...
Multidecadal Management Ensures High Sustainability and Low Risk in a Global Shark Biodiversity Hotspot
Overfishing continues to drive the decline of sharks and rays worldwide, contributing to the deterioration of their global conservation status. Effective fisheries management can prevent overfishing,....
onlinelibrary.wiley.com
October 15, 2025 at 7:44 AM
Reposted by Chris Mull
seaprinceaaron.bsky.social
🚨 NEW PUBLICATION 🚨

Today in @currentbiology.bsky.social, we found that 30 species of #sharks, #rays, and #chimaeras overlap with proposed #deepseamining in Areas Beyond National Jurisdiction #ABNJ - over 60% are already #threatened with #extinction 🦈

📸 Blue Planet Archive / Masa Ushioda
The Pygmy Shark (Euprotomicrus bispinatus), the world’s second smallest shark species and one of the species with a high overlap with proposed deep sea mining. Credit: Blue Planet Archive / Masa Ushioda.
October 2, 2025 at 7:55 PM
cgmull.bsky.social
New paper led by @seaprinceaaron.bsky.social in @currentbiology.bsky.social looking at the threats deep sea mining poses for sharks, rays, and chimaeras. We found 30 species are threatened via various pathways including collector impact and plumes at depth and pelagic discharge plumes.
Figure 1: highlighting various pathways through which mining can impact sharks, rays, and chimaeras including collector impact and plumes, and discharge plumes. Figure 2: The diversity of sharks, rays, and chimaeras impacted by deep sea mining operations. Nearly 2/3 of these species are already at an elevated risk of extinction.
October 2, 2025 at 9:40 PM
Reposted by Chris Mull
ivalina.bsky.social
I don't think many people realize that Canadian companies own something like 75% of the mines in the world.
mongabay.com Mongabay @mongabay.com · Sep 18
In this episode of our podcast, Brandi Morin, a Cree-Iroquois-French environmental journalist and freelancer for Mongabay, discusses how Canadian mining projects impact ecological health and the rights of Indigenous communities in places such as Ecuador and Bolivia.
Canada’s mining companies destroy biodiversity with impunity, Indigenous journalist reports
An international tribunal of environmental rights activists recently found extensive evidence that the Canadian mining sector is “guilty for the violation of Rights of Nature across South America and…
news.mongabay.com
September 18, 2025 at 10:34 PM
Reposted by Chris Mull
vdisanto.bsky.social
Apply for the Scripps Postdoctoral Fellowship! I'm looking to support a strong candidate in fish physiology and/or biomechanics. Deadline: Oct 9, 2025. Eligibility: PhD by Nov 30, 2026 with ≤3 years postdoc experience. 2 years, $74K salary, $6K research allowance 👉 apol-recruit.ucsd.edu/JPF04348 🧪 🐟
Scripps Postdoctoral Scholar Award - 2026
University of California, San Diego is hiring. Apply now!
apol-recruit.ucsd.edu
September 10, 2025 at 12:46 AM
cgmull.bsky.social
Had a great time chatting to the Beyond Jaws podcast about shark and ray biodiversity and threats. Thanks for having me!

youtu.be/9P1xnUmjJR0?...
Shark Science: How International Trade Fuels Unsustainable Shark and Ray Fisheries
YouTube video by Beyond Jaws Podcast
youtu.be
August 18, 2025 at 12:27 PM
cgmull.bsky.social
New Paper led by @natklinard.bsky.social We lay out a framework for assessing the ecological roles of reef sharks (but widely applicable) incorporating movement, trophic/community, and life history/population dynamics. w/@johnwayne5.bsky.social and A MacNeil
doi.org/10.1111%2Fbr...
Defining ecological roles of sharks on coral reefs
Sharks have often been perceived to play a critical role in the dynamics of coral reef ecosystems globally. Yet, there is relatively little evidence to support this idea across all but a limited set ...
doi.org
August 12, 2025 at 1:24 PM
cgmull.bsky.social
Hot off the press in Fish and Fisheries, led by @cathorswill.bsky.social. Life history and management metric imputation of Rhino Rays. Imputed traits/metrics reduce uncertainty compared to using surrogate values from congeners. Important for highly threatened spp #AES25

doi.org/10.1111/faf....
Imputation of Fisheries Reference Points for Endangered Data‐Poor Fishes, With Application to Rhino Rays
For data-limited fish species, sustainable management frequently relies on biological metrics that are derived from life-history trait data, as opposed to high-resolution time series of catch and abu....
doi.org
July 12, 2025 at 12:56 AM
Reposted by Chris Mull
sharkcolin.bsky.social
New #sharkscience led by Vinay Udyawer
Professional fishers’ knowledge informs distribution and interaction dynamics of Sawfish and River Sharks in coastal fishing grounds...

Amazing insights from fisher interviews about their changing interactions through time
link.springer.com/article/10.1...
Professional fishers’ knowledge informs distribution and interaction dynamics of Sawfish and River Sharks in coastal fishing grounds of the Northern Territory, Australia - Maritime Studies
Through their time at sea professional fishers possess and obtain invaluable knowledge and insights into the behaviour, distribution, and abundance of both target and non-target species. Their observa...
link.springer.com
June 11, 2025 at 7:36 PM
Reposted by Chris Mull
saveourseas.bsky.social
Applications for the SOSF Small Grant are open!
We call on early-career scientists with projects focused on sharks, rays, skates, sawfishes & chimaeras to apply.
This grant is designed to fund short-term projects (12-18 months) & small projects (average US$5,000).
To apply: grants.saveourseas.com
May 14, 2025 at 12:14 PM
Reposted by Chris Mull
ucdmarinescience.bsky.social
We are THISCLOSE to funding the Kendra Chan Bodega Marine Lab challenge, which funds life-changing research experiences for undergraduate students, no matter their financial situation, and honors Kendra's memory. Just 8 more gifts of any size before 5pm today will unlock $15,000: buff.ly/sVGlS6a
A portrait of Kendra Chan standing on the coast, laughing as the wind blows her hair.
April 12, 2025 at 10:28 PM
Reposted by Chris Mull
nickdulvy.bsky.social
New #GlobalSharkTrends study published in @science.org reveals #overfishing has more than halved shark & ray populations over the past 50-years causing widespread erosion of ecological function and exceptionally high extinction risk
👉Full article bit.ly/GlobalSharkTrends
🧵1/20
Scalloped hammerhead sharks (Sphyrna lewini) IUCN Critically Endangered © Masayuki Agawa_Ocean Image Bank
December 5, 2024 at 10:05 PM
Reposted by Chris Mull
frodsan.bsky.social
1/ Important read for anyone using, contributing, or building large databases by aggregating data sources. Discusses issues with data quality, duplication, credit attribution, etc, and includes recommendations for improvement

doi.org/10.1111/gcb.... #ecopubs
Improper data practices erode the quality of global ecological databases and impede the progress of ecological research The scientific community has entered an era of big data. However, with big data comes big responsibilities, and best practices for how data are contributed to databases have not kept pace with the collection, aggregation, and analysis of big data. Here, we rigorously assess the quantity of data for specific leaf area (SLA) available within the largest and most frequently used global plant trait database, the TRY Plant Trait Database, exploring how much of the data were applicable (i.e., original, representative, logical, and comparable) and traceable (i.e., published, cited, and consistent). Over three-quarters of the SLA data in TRY either lacked applicability or traceability, leaving only 22.9% of the original data usable compared with the 64.9% typically deemed usable by standard data cleaning protocols. The remaining usable data differed markedly from the original for many species, which led to altered interpretation of ecological analyses. Though the data we consider here make up only 4.5% of SLA data within TRY, similar issues of applicability and traceability likely apply to SLA data for other species as well as other commonly measured, uploaded, and downloaded plant traits. We end with suggested steps forward for global ecological databases, including suggestions for both uploaders to and curators of databases with the hope that, through addressing the issues raised here, we can increase data quality and integrity within the ecological community.
November 29, 2024 at 11:01 AM
Reposted by Chris Mull
readerofbannedbook.bsky.social
November 26, 2024 at 6:11 PM
Reposted by Chris Mull
sharkcolin.bsky.social
ICCAT again does NOT implement best practice "Fins Naturally Attached" rules thanks to just 2 of its members blocking widely supported efforts to get the measure implemented. Some other shark measures were adopted. Details in the link
www.sharkleague.org/2024/11/18/u...
#sharkconservation #shark
Unprecedented International Effort to Prevent Shark Finning Blocked by Japan & China - Shark League for the Atlantic and Mediterranean
ICCAT meeting ends in dramatic defeat of proposal to end at-sea fin removal while other shark safeguards advance Limassol, Cyprus. November 18, 2024. This year’s meeting of the International Commissio...
www.sharkleague.org
November 18, 2024 at 9:50 PM