Estuarine fish responses to strobe light, bubble curtains and strobe light/bubble-curtain combinations as influenced by water flow rate and flash frequencies

David R. Sager, Charles H. Hocutt, Jay Richard Stauffer, Jr.

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

This study examined the possible use of strobe lights and strobe light/bubble-curtaincombinations as behavioral guidance systems for estuarine fish. White perch (Morone americana), spot (Leiostomus xanthurus) and Atlantic menhaden (Brevoortia tyrannus) were tested in a behavior experimental tank for avoidance to strobe lights, bubble curtains and strobe light/bubble-curtain combinations at different water flow rates, strobe flash frequencies and light acclimations. Percentage avoidance of strobe light ranged from 8 to 36% for white perch, from 8 to 100% for spot and from 8 to 68% for menhaden, depending on the conditions tested. χ2 analyses indicated significant (P < 0.05) avoidance by white perch at most flash rates with a 0.2 ms-1 flow rate, and at 120 and 300 flashes min-1 with 0.3 and 0.5 ms-1 flows. Spot had significant avoidance for all flash rates at the 0.2 ms-1 flow, and for 300 and 600 flashes min-1 at water velocities of 0.3 and 0.5 ms-1. All species showed little avoidance of bubble curtains. Avoidances of 3-58% for white perch, 21-85% for spot and 9-81% for menhaden were obtained with the strobe light/bubble-curtain combinations. χ2 analyses indicated significant avoidance for most conditions at 0.2 and 0.5 ms-1 flows for spot and menhaden. White perch had significant avoidance for most conditions at the 0.2 ms-1 flow, but no avoidance at 0.5 ms-1. The strobe light and strobe light/bubble-curtain combinations elicited best avoidance results at flash rates of 300 min-1 or greater and low flow rates. Strobe lights show promise as a guidance system for estuarine fish.

Original languageEnglish (US)
Pages (from-to)383-399
Number of pages17
JournalFisheries Research
Volume5
Issue number4
DOIs
StatePublished - Jan 1 1987

All Science Journal Classification (ASJC) codes

  • Aquatic Science

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