Sources for "What Actually Predicts the Bass Bite?"
Last checked:
Our short video "What Actually Predicts the Bass Bite?" was posted on May 8, 2026. Five characters each made one claim: water temperature, twilight, wind, the moon and barometric pressure. This page lists the research behind each line. We rechecked every line against the original studies and against how the PrimeBite app rates bass today.
What we'd say differently today
- Water temperature is now the largest driver, not twilight. The bass rating changed in September 2026 (available since 1.6.6). Dawn and dusk are second.
- Barometric pressure: the app still doesn't score it. But the video said three studies. One of them doesn't test pressure (we had removed it in April 2026, before the video), so it's two direct fishing studies. "No significant link" in two small studies is not proof of zero effect. We also shouldn't have told viewers to stop trusting other apps. No study says that.
- "Backed by 33 peer-reviewed studies" isn't accurate. That card also ended our May 9 and May 10 videos. The bass rating cites six sources: four journal articles and two theses.
- "Shut down" in the water temperature and wind lines says more than the research does.
Each section shows what the video said, what the research says in its own words, how the app uses that factor today, and how we'd say it now. For the full bass model, see When Do Largemouth Bass Bite?.
Water temperature
The video said: "Bass feed harder as I rise from 41 to 82 degrees, past 82 they shut down."
What the research says:
- In a study of Iowa bass tournaments, "bass weigh-in probability was positively related to the number of bass weighed in at a tournament (β = 0.0184 ...) and to water temperature (β = 0.0451; 95% CI = 0.0058, 0.0844; Figure 5)". (Maahs et al. 2022, p. 1519)
- The tournaments in that study ran from about 5.7 °C to 28.7 °C (about 42 °F to 84 °F). The study's test for a curve that rises and then falls did not find one: those temperature terms' 95% confidence intervals "encompassed zero". (Maahs et al. 2022, p. 1520) The study did not measure warmer water than that.
- An older study on one lake found: "Angling success was highest at the onset of fall overturn when the surface temperature cooled to 18-21 C from a summer high of 27 C." The same author also wrote: "I cannot conclude that feeding activity increased in the cooler water." (Mallison 1988, abstract and p. 17)
How the app uses it today: Estimated water temperature is the largest driver of the bass rating. The rating rises with warmer estimated water across the range the Iowa study covered, and gets no extra credit above it. The water temperature is estimated from air temperature, and the app labels it as an estimate.
How we'd say it today: In one tournament study, bass were more likely to be weighed in as the water warmed, across about 42 °F to 84 °F. That study found no shutdown point in that range, and it didn't measure warmer water. "Feed harder" also goes further than the study, which measured catches, not feeding.
Twilight (dawn and dusk)
The video said: "I'm Twilight, by far the biggest driver of the bass bite. Dawn equals dusk, period."
What the research says:
- In a 35-day hook-and-line study on one lake: "success using a deep diving lure in 3 m of water peaked during morning (6 AM to 12 PM) and evening (6 PM to 9 PM) and was lowest at night (9 PM to 6 AM). The larger largemouth bass tended to be caught most frequently during low light levels (dawn and dusk)". The author concluded that "light is the most significant factor analyzed" in that study. (Mallison 1988, abstract)
- "Angling success in relation to time of day was significant at the .005 level". (Mallison 1988, p. 8) In the study's table, the 6 to 9 PM block had 19 bass caught where about 10 were expected. The 6 to 9 AM block had 10 where about 8 were expected. (p. 27)
- A tracking study of tagged fish in Toronto harbour found: "Both species exhibited peak acceleration at dawn and dusk." That measures movement, not catches. (Hlina et al. 2026, abstract)
How the app uses it today: Dawn and dusk are the second-largest driver, after water temperature. Dawn and dusk get the same peak in the app.
How we'd say it today: Dawn and dusk are a strong driver, but not the biggest. In the one direct fishing study, low light did best, and evening did better than morning. So "dawn equals dusk, period" is how the app treats them, not something the research proved.
Wind
The video said: "Bass want a moderate chop day. Too calm or too strong, they shut down."
What the research says:
- "bass weigh-in probability increased with wind speed to 12.2 km/h and then declined as wind speed exceeded 12.2 km/h (wind speed: β = 0.1654 ...; wind speed²: β = −0.0067; 95% CI = −0.0124, −0.0011; Figure 5)". 12.2 km/h is about 7.6 mph. (Maahs et al. 2022, p. 1519)
- The older one-lake study found: "Wind direction and magnitude were not correlated with angling success to any significant degree." (Mallison 1988, p. 18)
How the app uses it today: A moderate wind for that exact hour scores higher than calm or strong wind. Wind is the third-largest factor, after water temperature and dawn and dusk.
How we'd say it today: One tournament study found bass weigh-in probability peaked at a moderate wind of about 7.6 mph. Another study found no wind effect. Calm or strong wind gets less credit than a moderate breeze. It doesn't mean bass shut down.
The moon
The video said: "My phases shift bass behavior slightly. Twilight and water do the real work."
What the research says:
- "Angling efficiency was high during the full moons and low in transition periods between moon phases; all other moon phases showed the expected catch rates." (Mallison 1988, abstract) The author also noted that in that study the full moon fell during the coolest water, so "the variables are confounded". (p. 17)
- A tracking study of tagged bass found that lunar phase was a "significant determinant" of bass activity and depth during most individual moon cycles, but with "no repeatable patterns". Its authors wrote that solunar tables "may have little predictive value for identifying peak fishing time". (Hanson et al. 2008, abstract)
How the app uses it today: The moon has a small effect, and only around the full moon.
How we'd say it today: The moon adds a small bump near the full moon. The one fishing study that saw better full-moon catches also had changing water temperature at the same time. A tracking study found no repeatable pattern across moon cycles. "Twilight and water do the real work" still holds, with water temperature first.
Barometric pressure
The video said: "I'm barometric pressure. Three studies tested me on bass — zero found a real effect. Stop trusting apps that use me."
What the research says:
- "barometric pressure, and solunar periods revealed no significant relationship to angling." and "Barometric pressure was also insignificant to angling success." (Mallison 1988, abstract and p. 18)
- A second direct fishing study in our research library (it is not one of the six sources the rating cites) found that "Column water temperature, barometric pressure, water level, maximum and minimum air temperatures, and maximum and minimum water temperatures were not significantly correlated (p>0.05) with any size class catch rate". Its pressure readings covered a narrow range, 750.4 to 763.2 mmHg. (Burkett 1981, pp. 10–11)
- A different view: a small undergraduate study of cold fronts wrote, "This provides strong evidence that the change in pressure, temperature, and wind caused largemouth to feed at a much slower rate." A front changes pressure, temperature and wind together, so it doesn't test pressure alone. (Lang 2023, PDF p. 7)
- The video's "three studies" counted a 1976 study that doesn't test pressure. We had already removed it as pressure evidence in April 2026, so that line was out of date when the video was posted.
How the app uses it today: Barometric pressure is not scored.
How we'd say it today: PrimeBite leaves pressure out of the bass rating. Two direct fishing studies found no significant link between pressure and catches. That's not proof of zero effect, and a small cold-front study points the other way. Other apps make their own choices, and the research doesn't tell anyone to stop trusting them.
"Backed by 33 peer-reviewed studies"
This line ended our May 8 video, and also our May 9 "dusk vs. dawn" and May 10 "wind" videos. It isn't accurate. The bass rating cites six sources. Four are peer-reviewed journal articles (Smith et al. 2024, Maahs et al. 2022, Hanson et al. 2008 and Hlina et al. 2026), and two are theses (Mallison 1988 and Winter 1976). Of these, three measured catches directly (Smith, Maahs and Mallison). The others give movement or feeding context. Winter 1976 is used only as limited early-feeding context, not as pressure evidence. Our research library holds more studies than these six, but only these six set the rating.
Full Source List
| Source | Title | Type | Link |
|---|---|---|---|
| Smith et al. 2024 | Seasonal, spatial, and water-level predictors of angler catch and effort in Texas black bass reservoirs. North American Journal of Fisheries Management 44(1):79–92 | Journal article; rating source | doi:10.1002/nafm.10963 |
| Maahs, Sylvia & Weber 2022 | Effects of Length and Bag Limits on Largemouth Bass Tournament Capture and Mortality. North American Journal of Fisheries Management 42:1513–1529 | Journal article; rating source | doi:10.1002/nafm.10840 |
| Hanson et al. 2008 | Effects of lunar cycles on the activity patterns and depth use of a temperate sport fish, the largemouth bass, Micropterus salmoides. Fisheries Management and Ecology 15:357–364 | Journal article; rating source (context) | doi:10.1111/j.1365-2400.2008.00634.x |
| Hlina et al. 2026 | Seasonal effects on the acceleration of largemouth bass and Northern Pike in Toronto harbour. Animal Biotelemetry 14:5 | Journal article; rating source (context) | doi:10.1186/s40317-026-00444-6 |
| Mallison 1988 | Environmental influences on angling success for largemouth bass (Ohio State University honors thesis) | Thesis; rating source | |
| Winter 1976 | Early feeding-behavior context only | Thesis; rating source (context) | |
| Burkett 1981 | Correlation of hook-and-line vulnerability of largemouth bass with selected physicochemical parameters at Ridge Lake (Eastern Illinois University master's thesis) | Thesis; research library only | — |
| Lang 2023 | Analyzing the Effects of Cold Frontal Passage on the Feeding Habits of Micropterus salmoides (University of Nebraska undergraduate thesis) | Student thesis; research library only | — |
Page numbers refer to each document's printed pages, or the abstract where noted. A PDF page is used where a paper has no printed page numbers. Spotted a mistake? See About PrimeBite for how to report it.
Ratings are indicators, not guarantees.
Get the app
Free to download on iPhone and Android. Pro is optional.