Effects of Moonlight and Daylight on Hydroacoustic Estimates of Pelagic Fish Abundance

Luecke, Chris; Wurtsbaugh, Wayne A.

doi:10.1577/1548-8659(1993)122<0112:eomado>2.3.co;2

Cited by 67 publications

(58 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Light intensity changes appear to be a trigger for directional changes in many types of migration, thus constituting a primary factor in the regulation of an organism's behavioral distribution. To understand the influence of light in these behaviors, varying light level conditions are usually considered in relation to the diel distribution of organisms (e.g., day, night, moon phase, and time of the year) (Clark & Levy, 1988;Luecke & Wurtsbaugh, 1993;Appenzeller & Leggett, 1995;Beauchamp et al, 1999;De Robertis, 2002;Probst & Eckmann, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Predation risk can also be diminished during daylight hours using schooling strategies in open waters (Beauchamp et al, 1999). Highly spatially structured bottoms in the near-shore habitats, deep water layers, or lake bottoms with low light intensities may also be used as refuge from visual predators (Luecke & Wurtsbaugh, 1993;Appenzeller & Leggett, 1995;Beauchamp et al, 1999). Changes in diet and habitat throughout the ontogeny of an organism may also imply changes in behavioral displacement patterns (Shoup et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extensive diel fish migrations in a deep ultraoligotrophic lake of Patagonia Argentina

et al. 2010

View full text Add to dashboard Cite

Andean Patagonian lakes are ultraoligotrophic, highly transparent water bodies with very low densities of organisms at the different levels of their trophic food webs. Little is known about spatial distribution and habitat use by fish in these lakes. Hydroacoustic and active sampling techniques were used to study the distribution, composition, and displacement of organisms in an Andean lake throughout the diel cycle on two different moon phase days. Sound scattering layers (SSLs) were found both in the near-shore and pelagic habitats at different times of the day. These SSLs, formed by galaxiid larvae and adults, underwent displacement during the time periods of dawn and dusk, giving rise to the redistribution of organisms in the different habitats. The organisms show high sensitivity to light intensity, displaying different behaviors depending on moon phases. Extensive diel vertical migrations show that the deep pelagic habitats provide diurnal refuge for native galaxiids in Andean Patagonian lakes. Due to the high densities of galaxiid larvae and adults, it is likely that diel migrations generate an active flow of energy and matter between habitats, which could have a profound influence on whole lake dynamics.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Extensive diel fish migrations in a deep ultraoligotrophic lake of Patagonia Argentina

et al. 2010

View full text Add to dashboard Cite

show abstract

“…The effect of moon light on the activity of pelagic fish species has been found to be considerable, with decreased catches close to the full moon, explained with predator avoidance (Luecke & Wurtsbaugh, 1993;Contor & Griffith, 1995;Gaudreau & Boisclair, 2000). The predator avoidance of pikeperch at the time of full moon is unlikely, because only seals are large enough to predate on mature pikeperch in the Baltic, and further, similar findings of Koed et al (2000) in an area where there are no seals, means that predator avoidance do not explain the behaviour.…”

Section: Discussionmentioning

confidence: 99%

Effects of abiotic factors on movements of pikeperch during pre-spawning and spawning season in a Baltic archipelago

Saulamo

Lappalainen

2006

Hydrobiologia

View full text Add to dashboard Cite

The effects of temperature, water level and moon phase on the movements of pikeperch (Sander lucioperca) were studied during prespawning and spawning season from April to June. Trends in catches and temperature were removed with linear regression. Cross-correlation analysis showed that temperature change one and two days earlier had the strongest effect on catches. Close to the new moon, pikeperch catches increased, whereas changes in water level had no effects on movements.

show abstract

“…Light intensity may also be a significant issue during night surveys. Luecke and Wurtsbaugh (1993) found that Bonneville ciscoes Prosopium gemmifer dispersed closer to the bottom during the full moon compared to the new moon in Bear Lake, Utah, creating difficulty in detecting fish during the full moon and reducing acoustic density and biomass estimates by 50%. Abundance estimates from acoustic counts of adult paddlefish in Horseshoe Lake were greater or more variable than population estimates derived from depletion gillnetting.…”

Section: Discussionmentioning

confidence: 99%

Paddlefish as Potential Acoustic Targets for Abundance Estimates

Hale

Horne

Degan³

et al. 2003

Transactions of the American Fisheries Society

View full text Add to dashboard Cite

Abstract.-Underwater acoustics is a noninvasive sampling technique that potentially reduces expense and injury to target species, but this method may be underutilized for sampling large freshwater fishes. We measured target strength (TS), developed anatomically based backscatter models, and conducted gill-net and acoustic surveys of paddlefish Polyodon spathula to explore the potential use of acoustic surveys for estimating the abundance of large freshwater fishes. Mean TS measured from two size-groups of paddlefish at 200 kHz was Ϫ37.14 decibels (dB; SD ϭ Ϫ2.36) for age-0 fish (353-406 mm) and Ϫ27.25 dB (SD ϭ Ϫ2.21) for adult fish (1,018-1,284 mm), indicating that TS could differentiate these size-groups. Backscatter models identified strong contributions of the swim bladder to TS and revealed the sensitivity of acoustic backscatter to paddlefish length, aspect, and acoustic carrier frequency. Model results were generally within one SD of measured means from individual fish of each size-group. Target strength results were used to count two populations of adult paddlefish in mobile surveys using an echo sounder with a 200-kHz, 6Њ split-beam transducer. One population was stocked in 1.6-ha Hebron Pond, where no large fish were previously present. The other population resided in 28-ha Horseshoe Lake, an Ohio River backwater. Twenty-one paddlefish stocked in Hebron Pond were accurately counted during the first of six side-looking surveys, but subsequent surveys only counted between two and seven fish. Depletion gillnetting results in Horseshoe Lake provided an estimated baseline of 130 Ϯ 55 paddlefish for comparison with abundance estimates from side-looking and down-looking acoustic surveys during day and night. Acoustic abundance estimates ranged from 187-313 fish (sidelooking) to 3,464-13,489 fish (down-looking) depending on survey time (day or night) and the approach to analysis. Ratio estimates and cluster estimates provided similar results, and the coefficient of variation of the mean (100·SE/mean) ranged from 20% to 50%. Acoustic estimates were either greater or more variable than those derived from depletion gillnetting, yet acoustic surveys required only 6 man-hours compared to 180 man-hours for the gillnetting estimate. Our study is the first to indicate that TS can be used to count adult paddlefish and that, upon refinement of survey techniques, TS can be used to estimate paddlefish abundance. The benefits of acoustic surveys may be realized sampling other large freshwater fishes when the target species can be differentiated with TS and considerations are made for transducer selection.

show abstract

Effects of Moonlight and Daylight on Hydroacoustic Estimates of Pelagic Fish Abundance

Cited by 67 publications

References 19 publications

Extensive diel fish migrations in a deep ultraoligotrophic lake of Patagonia Argentina

Extensive diel fish migrations in a deep ultraoligotrophic lake of Patagonia Argentina

Effects of abiotic factors on movements of pikeperch during pre-spawning and spawning season in a Baltic archipelago

Paddlefish as Potential Acoustic Targets for Abundance Estimates

Contact Info

Product

Resources

About