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Effectiveness in avoidance response of the mottled spinefoot Siganus fuscescens to strobe light flashing on seaweed browsing

Journal of National Fisheries University Volume 67 Issue 4 Page 253-261
published_at 2019-03
67-4-253-261.pdf
[fulltext] 933 KB
Title
点滅閃光に対するアイゴの大型海藻の採餌抑制効果
Effectiveness in avoidance response of the mottled spinefoot Siganus fuscescens to strobe light flashing on seaweed browsing
Creators Noda Mikio
Creators Komeda Miyuki
Creators Murase Noboru
Source Identifiers
Creator Keywords
LED strobe light herbivorous fish Siganus browsing seaweed avoidance
This study examined the possible use of white LED strobe light as suppression of seaweed overbrowsing for the mottled spinefoot Siganus fuscescens. Effectiveness in avoidance response of S. fuscescens to strobe light flashing was compared in relation to feeding behavior of algal baits placed in front of a waterproof strobe light emitting device in two treatments of an open feeding space and two adjacent small feeding spaces with poor visibility in an indoor tank. Strobe frequency and irradiance of the light emitting device were 5 Hz and 43 Wm^{-2}(17,500 lux). Tests were videotaped, and behavioral aspects of feeding such as numbers of bites, numbers of visits to compartments with algal baits, and durations of visits were measured. In the open feeding space treatment, the fish showed little aversive responses to presence of the strobe light. In the small feeding space treatment, the fish showed remarkable avoidance to feeding within a compartment with strobe light flashed, while it showed no avoidance within another one with no light. Effectiveness of the strobe light associated with feeding space was discussed in reference to potential predation risk.
Languages jpn
Resource Type departmental bulletin paper
Publishers National Fisheries University
Date Issued 2019-03
File Version Version of Record
Access Rights open access
Relations
[ISSN]0370-9361