Show notes
The pilot episode of The Science of Fishing. Why this show exists, what we'll cover, and why the most important number for striped bass anglers in the Northeast might be one most have never heard: 9%.
The 3 things you'll take away
- Release ≠ Survival. Across summer striped bass fisheries, post-release mortality runs ~9% on average — and climbs sharply in warmer water, with treble hooks, and with extended fight times.
- What you do in 30 seconds matters more than what hook you use. Water temperature, handling time, and air exposure are the three biggest levers in your control.
- The data is good. The translation is bad. Most anglers never see the studies; the science of fishing is about closing that gap one episode at a time.
Talking points
- What "release mortality" actually measures (and how researchers tag, hold, and resight fish to estimate it).
- Why summer-warm water is the silent killer — and what the temperature curve looks like.
- Circle hooks vs J-hooks vs treble hooks: what the meta-analysis says.
- Practical handling rules: the 30-second air-exposure ceiling, supporting horizontal weight, and reviving in the prop wash.
- What the show will do every week: pull the science out of the journals and turn it into something you can use at 5 a.m. on the water.
Full transcript
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00:00Mark: Welcome to The Science of Fishing. I'm Mark, and this is the pilot episode of a show I've wanted to make for about ten years. Here's the premise. There is more peer-reviewed research about how fish actually behave, where they feed, what survives release, what doesn't — than at any point in human history. And almost none of it reaches the people standing on the bow at sunrise. That's the problem we're solving.
00:38Mark: Each week we'll pick one question that anglers actually care about and we'll dig into what the science says — and where the science is wrong or incomplete or just under-translated. Today, for the pilot, we're starting with the question that bugs me the most: when you release a striped bass in July, how often does it actually live?
01:12Mark: The short answer is "about 91% of the time, on average." Which means 9% of the time, you released a fish that didn't survive. And across the recreational fishery — which catches and releases tens of millions of striped bass every year along the Atlantic coast — that 9% is doing as much damage as a meaningful slice of the legal harvest.
02:03Mark: Let's talk about where that 9% comes from. The big numbers go back to a series of studies from the early 1990s onward — Diodati and Richards, Millard's work on Hudson tributaries, and the ASMFC's ongoing release-mortality literature reviews. The methods are varied: tag and resight, holding-cage studies, telemetry. They keep landing on a fishery-wide weighted average around 9%.
03:21Mark: But — and this is the part nobody talks about on the dock — that 9% hides a huge amount of variation. In cool water, with single-hook artificials, with quick release, you can get below 2%. In summer, 70-plus degree water, with bait and a deeply hooked fish, you can crack 25% in some samples. The fishery average is just the average. You are not the average. You can be way better, or way worse, depending on what you do in the 30 seconds after you hook up.
05:47Mark: So what are the levers? Three of them, ranked by how much they matter. Number one, water temperature. Above about 70°F, mortality climbs sharply. Above 75, it gets ugly. If you fish a hot July afternoon for stripers in the back of a bay, you are running a different math problem than the same fish at 4 a.m. in 62-degree water.
07:02Mark: Number two, hook type and hook location. Circle hooks reduce deep-hooking dramatically — that's the single most-studied finding in this whole literature. Trebles are worse than singles. Bait is worse than artificials, mostly because fish swallow it deeper.
08:11Mark: Number three — and this is the one almost nobody has a number for — air exposure and handling. There's good work out of Cooke and his collaborators showing that every 30 seconds of air exposure measurably raises mortality. Holding a big fish vertically by the jaw causes internal injuries you can't see. Reviving a fish in the prop wash actually works — that's not just folklore.
10:18Mark: So here's the deal we're going to make on this show. Every episode, I'm going to pick one of these questions, find the actual research, talk to the people who did it where I can, and give you the version that ends with "okay, but what do I actually do tomorrow morning?" Because that's the part that's been missing.
11:34Mark: Next week we're going to talk to a fisheries biologist about a piece of work she did on post-release behavior in striped bass — what the fish do in the first six hours after you let them go, and why some make it and some don't. If you want that episode in your inbox the morning it drops, subscribe at the bottom of this page.
12:01Mark: Thanks for listening to the pilot. Welcome to The Science of Fishing.
[End of transcript — full transcript abridged for brevity in the pilot. Per-episode transcripts will be unabridged.]