Sensitive Light Meter for Fish Behavior Studies

Holanov, Stephen H.

doi:10.1577/1548-8659(1980)42[120:slmffb]2.0.co;2

Cited by 1 publication

(2 citation statements)

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“…Ambient light intensity was measured with an underwater light meter (Holanov, 1980) sensitive over the range of starlight to daylight. The meter was fitted with a Wratten 106 gel filter to shift its peak spectral sensitivity (350 to 450 nm; range 300 to 650 nm) to more closely match that of the centrarchid eye (c. 525 nm; Bridges, 1964).…”

Section: Field Light Intensitiesmentioning

confidence: 99%

“…The change in light intensity from sunlight to full moonlight was measured on 15 December 1983 under calm, cloud-free conditions at Pena Blanca Lake, a turbid (0·4 m Secchi depth) reservoir in Arizona, U.S.A. Starlight measurements were made during clear, moonless nights at Parker Canyon Lake and Alamo Lake, Arizona, during summer 1983. Measured light levels were converted from amps to lux following the method of Holanov (1980).…”

Section: Field Light Intensitiesmentioning

confidence: 99%

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Foraging success of largemouth bass at different light intensities: implications for time and depth of feeding

McMahon

Holanov

1995

Journal of Fish Biology

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Laboratory feeding trials were conducted to determine how light intensity affects foraging success by the visual piscivore, the largemouth bass (Micropterus salmoides). Foraging success was greater than 95% at light levels ranging from low intensity daylight (2·43 10 2 lx) to moonlight (3 10 3 lx), but declined significantly to 62% at starlight (2 10 4 lx) and near 0% in total darkness. Over a range of low to high water clarities (0·5, 2·0, and 4·0 m Secchi depth), estimated depth limits for feeding during the day ranged between 5·5 to 44 m and from 1·6 to 13 m at night during a full moon. At starlight, light intensity rapidly attenuated to a level below the feeding threshold within 0·5 m of the surface at all water clarities. The depth of the water column available for feeding in low clarity water (0·5 m Secchi) was 67 and 75% less than at moderate (2·0 m Secchi) and high (4·0 m Secchi) water clarities. The findings illustrate how differences in the light environment can have important ramifications for predator-prey interactions.

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Section: Field Light Intensitiesmentioning

confidence: 99%

Section: Field Light Intensitiesmentioning

confidence: 99%