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Jeff Kopaska

@jeffkopaska.bsky.social
341 followers 196 following 66 posts

Executive Director at American Fisheries Society. Iowa State Cyclone. Love good beer and fishing. Passionate about fish, fisheries, and water quality.

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Jeff Kopaska @jeffkopaska.bsky.social · 09/10/2026
Happy Fishy Friday! E. ictaluri causes enteric septicemia, a big problem in catfish aquaculture. Vaccination seems the best solution. Bacteria were genetically modified to eliminate the virulence. Vaccinated fish survived well and resisted exposures to wild strains. academic.oup.com/jaah/article...
academic.oup.com
Edwardsiella ictaluri type III and type VI secretion system mutant strains as candidates for live attenuated vaccines
ABSTRACTObjective. Edwardsiella ictaluri, the causative agent of enteric septicemia of catfish, causes substantial economic losses to Channel Catfish Ictal
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Jeff Kopaska @jeffkopaska.bsky.social · 15/05/2026
Happy Fishy Friday! The take home from today's article - Aquatic connectivity improvements require planning and collaboration. doi.org/10.1093/fshm...
doi.org
A roadmap for aquatic organism passage assessments of stream crossings
ABSTRACT. Road crossings can fragment streams, limiting fish growth, survival, and fitness. Yet, millions of road stream crossings remain unassessed for fi
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Jeff Kopaska @jeffkopaska.bsky.social · 02/05/2026
Happy Fishy Friday - we are asking if Bigger is Better? Research suggests smaller, more numerous chinook salmon produced more and more timely adult returns. doi.org/10.1093/naaq...
doi.org
Trade-offs between release number and fish size for Chinook Salmon hatchery programs
AbstractObjective. Salmon populations have been declining over the past several decades, and recent studies have found that hatchery-reared fish are return
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No Context College Basketball @contextfreecbb.bsky.social · 14/02/2026
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Jeff Kopaska @jeffkopaska.bsky.social · 18/01/2026
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Jeff Kopaska @jeffkopaska.bsky.social · 16/01/2026
Truth
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Jeff Kopaska @jeffkopaska.bsky.social · 16/01/2026
#FishyFriday Today’s paper assesses if fish meal and oil from invasive carp can replace menhaden sourced materials in channel catfish aquaculture. If so, could be a big win for freshwater and marine systems. Enjoy this paper from @AmFisheriesSoc.bsky.social academic.oup.com/naja/advance...
academic.oup.com
Potential of invasive carp as a source of fish meal and fish oil in Channel Catfish diets
ABSTRACTObjective. Invasive carp, a name encompassing Black Carp Mylopharyngodon piceus, Silver Carp Hypophthalmichthys molitrix, Bighead Carp H. nobilis,
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Jeff Kopaska @jeffkopaska.bsky.social · 19/12/2025
Some fishy stuff going on here
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Jeff Kopaska @jeffkopaska.bsky.social · 17/12/2025
So sorry to hear this Matt. Wishing you peace.
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Jeff Kopaska @jeffkopaska.bsky.social · 11/12/2025
From @amfisheriessoc.bsky.social
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American Fisheries Society @amfisheriessoc.bsky.social · 09/12/2025
On the 2nd day of Fishmas, we are passing the mic to the AFS North Central Division President, a 15-year AFS member, and fisheries biologist, Drew Holloway!
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Jeff Kopaska @jeffkopaska.bsky.social · 08/12/2025
On the first day of #Fishmas
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American Fisheries Society @amfisheriessoc.bsky.social · 03/12/2025
Have you been hunting for great prices in the AFS Bookstore? Open season on Fisheries Books is here, Nov 24–Jan 23! With a free 59-day license for all and no daily bag limits, there's a trophy out there for everyone. Catch yours today! fisheries.org/bookstore/al...
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Jeff Kopaska @jeffkopaska.bsky.social · 19/11/2025
Importance information for the conservation community and economy.
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Oxford Academic @academic.oup.com · 19/11/2025
Research published in Fisheries makes an impact! Browse some of the most read, top cited, and highly downloaded articles making a splash in the statistics community: oxford.ly/3LGcw8z @amfisheriessoc.bsky.social
High Impact Research from Fisheries. Read Now.
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American Fisheries Society @amfisheriessoc.bsky.social · 07/11/2025
This week Executive Director @jeffkopaska.bsky.social joined Community Kevin Brannon on The Reel Anglers' Podcast to discuss conservation, fishing regulations, partnerships, and more: youtu.be/FbTIZ16cPpQ?...
youtu.be
Reel Angler Podcast: Community Kevin talks with Jeff Kopaska of the American Fisheries Society.
YouTube video by Rough Edge Studios / Rough Edge FM
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American Fisheries Society @amfisheriessoc.bsky.social · 21/10/2025
“I have to be hopeful… that our grandchildren will see we did everything we could.” Christina Parker shares how she’s helping native fish survive climate extremes in CA. 🎥 Watch her story + the full #TomorrowsCatch series here: contentwithpurpose.co.uk/afs/tomorrow...
contentwithpurpose.co.uk
Christina Parker - Tomorrow's Catch
Christina Parker leads native fish conservation in California, using climate-resilient strategies like species rescue and habitat restoration to protect vulnerable aquatic life.
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Jeff Kopaska @jeffkopaska.bsky.social · 05/10/2025
Check out this week's Fisheries Podcast. I was interviewed about how things are going @amfisheriessoc.bsky.social, and my vision for the future, working to make AFS valuable and relevant for all fisheries professionals. fisheriespodcast.podbean.com/e/329-afs-vi...
fisheriespodcast.podbean.com
329 - AFS' vision for the future with Executive Director Jeff Kopaska | The Fisheries Podcast
This week, Preston chats with the new Executive Director of The American Fisheries Society (AFS), Jeff Kopaska. They cover the unprecedented challenges Jeff has faced in his first year in the new role...
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American Fisheries Society @amfisheriessoc.bsky.social · 26/09/2025
In this week's #FishyFriday, @jeffkopaska.bsky.social discusses the 2024 winner of Best Paper in Marine and Coastal Fisheries - "Ecosystem‐level reference points: Moving toward ecosystem‐based fisheries management": fisheries.org/2025/09/best...
fisheries.org
Best Paper in Marine and Coastal Fisheries - American Fisheries Society
Ecosystem‐level reference points: Moving toward ecosystem‐based fisheries management, by Wendy E. Morrison, Stephanie A. Oakes, Melissa A. Karp, Max H. Appelman, and Jason S. Link
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David Shiffman, Ph.D. 🦈 @whysharksmatter.bsky.social · 19/09/2025
Please enjoy my interview on the American Fisheries Society podcast. podcasts.apple.com/us/podcast/2... 🧪🌎🦑🦈 #SciComm
podcasts.apple.com
2025 Excellence in Public Outreach Award recipient David Shiffman
Podcast Episode · AFS Beneath the Surface · 09/19/2025 · 25m
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Jeff Kopaska @jeffkopaska.bsky.social · 19/09/2025
#FishyFriday
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Moira Donovan @moiradonovan.bsky.social · 12/09/2025
In the Miramichi, Atlantic salmon populations are dropping precipitously. Salmon conservation groups say the culprit is clear: striped bass. But as I explored in this story for @theguardian.com, the picture is murky, especially in a changing climate www.theguardian.com/environment/...
theguardian.com
‘It’s an all-you-can-eat buffet’: striped bass in a Canadian river are gobbling up all the salmon. Is a mass cull the answer?
Whether to kill one species to save another has split biologists, anglers and Indigenous communities in the Miramichi
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Jeff Kopaska @jeffkopaska.bsky.social · 12/09/2025
#FishyFriday What allows native fish repatriations to be successful? What results in failure? The fish in question, the fish community, abiotic factors, and spatial scale-all of it. To explore this, here is the 2024 TAFS Best Paper from @amfisheriessoc.bsky.social academic.oup.com/tafs/article...
academic.oup.com
Multiscale analysis predicts native species presence based on habitat and nonnative species abundance
AbstractObjective. The loss and degradation of aquatic habitat through fragmentation, water extraction, and climate warming contribute to declining native
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Jeff Kopaska @jeffkopaska.bsky.social · 11/09/2025
I know that guy!
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Jeff Kopaska @jeffkopaska.bsky.social · 08/09/2025
It is thick, and it is fishy.#Basswood 😉
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Jeff Kopaska @jeffkopaska.bsky.social · 08/09/2025
Duuude! Any time other than Iowa-ISU home game, I would have come up there! Hope you had a great trip. Thoughts about ISU-OSU Thanksgiving weekend...
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Jeff Kopaska @jeffkopaska.bsky.social · 07/09/2025
#SundayFishSketch sorry for my long absence. No fishy puzzles recently. This one is a donation for the upcoming North American Sturgeon and Paddlefish conference. My best attempt at a shovelnose sturgeon. A gift from @amfisheriessoc.bsky.social
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Arkearth.org 🐝🦋 @arkearth.bsky.social · 26/02/2025
The Bee Brick is a mandatory addition to new construction projects in the UK. They provide tiny homes for solitary bees; the most prolific pollinators 🐝
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American Fisheries Society @amfisheriessoc.bsky.social · 26/08/2025
Expert Interviews: Dr. Marlis Douglas | Jeff Kopaska @jeffkopaska.bsky.social | Gary Whelan | Christina Parker | MeiLin Precourt | Joseph Snapp | Julie Claussen @julielovesfish.bsky.social | Dr. Katherine O’Reilly @drkatfish.bsky.social | Jay Hesse | Dr. David Shiffman @whysharksmatter.bsky.social
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Jeff Kopaska @jeffkopaska.bsky.social · 23/08/2025
My Fishy Friday entry for this week. Enjoy!
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AFS Science Communication Section @afs-scicomm.bsky.social · 06/08/2025
Meet Kerry! She is one of three wonderful speakers lined up to present a 5-minute Lightning Talks during our session next Tuesday at #AFS155 in San Antonio. Kerry will present her experiences communicating about water quality in the aftermath of two major hurricanes that hit Tampa Bay.
Flyer advertising lightning talks for the session “Science Communication Through Emotionally Charged Extreme Events”. Talks will be held from 1:35-1:50 on Tuesday August 12 in Rivercenter Conf Rm 9. Speaker Kerry Flaherty-Walia from Tampa Bay Estuary Program will present “Fishing After Hurricanes: is it safe to get back on the water?” Abstract: in the span of 2 weeks in 2024, Hurricanes Helene and Milton packed a one-two punch over the Tampa Bay Area leaving a trail of destruction in their wake. Extreme storm surge and rainfall caused widespread flooding and concerns about debris and water conditions. By staying informed and engaged with regional partners, accurate and timely information was communicated to address concerns and alleviate fears.
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Jeff Kopaska @jeffkopaska.bsky.social · 01/08/2025
Happy Fishy Friday! I love the collaboration in this paper. Lake sturgeon are an imperiled species. Artificial propagation is a strategy to amend populations. The results were not what the authors expected, and many more questions were raised. academic.oup.com/naja/advance...
academic.oup.com
Effects of physical enrichment on survival, growth, and physiology of captive-reared juvenile Lake Sturgeon
ABSTRACTObjective. We investigated whether physical enrichment can be used at the captive-rearing stage to promote a more natural phenotype and better prep
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Jeff Kopaska @jeffkopaska.bsky.social · 01/08/2025
You all rock. Thanks for all you do!
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AFS Science Communication Section @afs-scicomm.bsky.social · 22/07/2025
We will be hosting another student feedback session on Thursday, July 31 at 7pm CT. Students can receive feedback on how to improve their #fishscicomm ahead of their big days at the @amfisheriessoc.bsky.social Annual Meeting in the Lonestar State.
MARK YOUR CALENDARS! 

Your AFS SciComm Section will be hosting another student feedback session on Thursday, July 31 at 7:00pm CT. We encourage student members to attend and present their presentation or poster for the upcoming @americanfisheries Annual Meeting in San Antonio, TX! Students will receive feedback from other AFS SciComm Section members on how to improve their presentations ahead of their big days in the Lonestar State. 

Members can find a link to access the 7/31 feedback session in their email.
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Jeff Kopaska @jeffkopaska.bsky.social · 26/07/2025
Fishy Friday! This paper highlights an AFS symposium on Sonar Techniques. I enjoyed this paper utilizing new technology, adding to the fishery scientists toolbox. The authors identified the challenges and benefits of this approach, and Atlantic Sturgeon! academic.oup.com/tafs/article...
academic.oup.com
Using side-scan sonar to estimate the abundance of dual-spawning Atlantic Sturgeon in the Great Pee Dee River, South Carolina
ABSTRACTObjective. Abundance estimates of spawning adult Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus are needed to assess current population status a
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American Fisheries Society @amfisheriessoc.bsky.social · 15/07/2025
In our latest AFS Beneath the Surface podcast, we continue our Section Roundup with a look at the Invasive and Introduced Species Section: americanfisheriessociety.podbean.com/e/section-ro...
americanfisheriessociety.podbean.com
AFS Section Roundup: Invasive and Introduced Species Section | AFS Beneath the Surface
The AFS Sections roundup continues today with an introduction to the Invasive and Introduced Species Section! Today's guest is Nathan Lederman, the Section's current president. Join us to learn about this section's history and current projects. To learn more, join their business meeting at the AFS Annual Meeting next month!   Episode guest: Nathan Lederman nathaniel.lederman@wisconsin.gov   Learn more about the American Fisheries Society and our upcoming Annual Meeting! Comments or suggestions? Submit via email to lmaza@fisheries.org
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Jeff Kopaska @jeffkopaska.bsky.social · 12/07/2025
As you might suspect, I will be there!
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Jeff Kopaska @jeffkopaska.bsky.social · 12/07/2025
@whysharksmatter.bsky.social doing the exact same thing in natural resources/conservation
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Jeff Kopaska @jeffkopaska.bsky.social · 11/07/2025
Check out this video from the USFWS highlighting the roles anglers, agencies and sport fishing manufacturers play in conserving and enhancing fish populations. This one talks about Iowa, but it happens nationwide. 🎣🐟 m.youtube.com/watch?v=HBZf...
m.youtube.com
Partnering in America's Heartland for Sport Fish Restoration
YouTube video by Partner with a Payer
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Environmental Information: Use and Influence (Dalhousie Univ.) @eiui.bsky.social · 05/07/2025
Conveying scientific #evidence to the public is important at individual & societal levels. But communication can be problematic. Taddicken & Thoms compared linguistic analysis & audience assessments of experts & found a human factor may affect perceptions of comprehensibility doi.org/10.3389/fcom...
Title, authors’ names, abstract, and keywords from a paper about whether scientific experts are comprehensible in addressing general audiences
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Jeff Kopaska @jeffkopaska.bsky.social · 26/06/2025
We had an outstanding time representing the fisheries community, talking about important issues with Congressional offies.
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Chris Jones @theswinerepublic.bsky.social · 21/06/2025
1.1 million pounds of nitrate-nitrogen will pass through the city of Cedar Rapids today in the Cedar River. That's equivalent to the contents of 322 of these. One day, one river, in Iowa. waterdata.usgs.gov/nwis/uv?cb_0...
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American Fisheries Society @amfisheriessoc.bsky.social · 16/06/2025
AFS joined other science, conservation, and outdoor organizations in a "Statement on Federal Public Lands Transfer, Sale, and Exchange." The current Senate budget reconciliation bill requires federal agencies to sell 2-3 million acres in 11 western states. Read more: fisheries.org/2025/06/stat...
fisheries.org
Statement on Federal Public Lands Transfer, Sale, and Exchange - American Fisheries Society
American Fisheries Society ● American Fly Fishing Trade Association ● Angler Action Foundation ● Archery Trade Association ● Backcountry Hunters & Anglers
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Jeff Kopaska @jeffkopaska.bsky.social · 29/05/2025
@sjcfishy.bsky.social The best!
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American Fisheries Society @amfisheriessoc.bsky.social · 28/05/2025
Save for San Antonio! Only 1 week until early bird registration closes on Wednesday, June 4. AFS members can also save up to $200 on registration when logging in with their membership credentials. Want to save on registration, but not a member? Join AFS today: fisheries.org/membership/j...
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American Fisheries Society @amfisheriessoc.bsky.social · 22/05/2025
At AFS, we keep costs down by negotiating room blocks in exchange for meeting space, but we need your help! Booking your room within the AFS hotel blocks helps us keep registration rates as low as possible for this and future meetings. Secure your room today: bit.ly/4jLvR40... #fisheries #AFS155
bit.ly
Hotels – 155th AFS Annual Meeting
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American Fisheries Society @amfisheriessoc.bsky.social · 19/05/2025
The USGS Ecosystems Mission Area, the foundation of the science that informs fish and wildlife management, disease response, and conservation policy across the U.S., is at risk. We're joining @nationalwildlife.bsky.social in a virtual rally on May 22 - register now: www.mobilize.us/nwf/event/79...
mobilize.us
Virtual Rally to Save the Cornerstone of Conservation Science · National Wildlife Federation
We need YOU as we rally in support of critical federal government services at risk of being lost forever. The U.S. Geological Survey Ecosystems Mission Area is responsible for many of the programs tha...
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Jeff Kopaska @jeffkopaska.bsky.social · 20/05/2025
That is too much of a challenge this soon! @martyhamel.bsky.social
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JD Schooley @dirtydog.bsky.social · 28/04/2025
I really hope that content such as this reaches and resonates with hunters and anglers across the US. The downstream effects of the cuts to science and the people who do it will *definitely* impact mgmt of fish and game in all states. podcasts.apple.com/us/podcast/c...
podcasts.apple.com
Ep. 371: A Former USFWS Director Speaks Out
Podcast Episode · Cal of the Wild · 04/28/2025 · 54m
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Mark Scheuerell @scheuerell.bsky.social · 15/05/2025
Please join the @nationalwildlife.bsky.social, @amfisheriessoc.bsky.social & others at the “Virtual Rally to Save the Cornerstone of Conservation Science” in support of the USGS's Ecosystem Mission Area Thursday, May 22 12 – 1pm EDT www.mobilize.us/nwf/event/79...
mobilize.us
Virtual Rally to Save the Cornerstone of Conservation Science · National Wildlife Federation
We need YOU as we rally in support of _critical_ federal government services at risk of being lost forever. The U.S. Geological Survey Ecosystems Mission Area is responsible for many of the programs t...
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