- 著者一覧
- Murase Noboru
Murase Noboru
Id (<span class="translation_missing" title="translation missing: en.view.desc">Desc</span>)
Journal of National Fisheries University Volume 70 Issue 4
pp. 115 - 123
published_at 2022-03
Recently overbrowsing by fish in cultivation of the wakame Undaria pinnatifida has become problematic and the black scraper Thamnaconus modestus is suspected of the feeding damage for the cultured U. pinnatifida as well as a few herbivorous fishes and the Japanese black seabream Acanthopagrus schlegelii, but aspects on feeding behavior and bite scars of the species are extremely limited. We examined characteristics of bite scars left on thalli of the cultured U. pinnatifida by feedng of T. modestus in a tank experiment. The species showed active feeding behavor of the cultured U. pinnatifida and conspicuously consumed juveniles rather than adults. Bite marks left on blades were categorized into three shapes of arc, ellipse and serration and particularly the ellipse-shaped bite mark is characteristic of T. modestus, unknouwn for other overbrowsing fishes. Additionally cut surfaces of those bite marks were edged with irregular gentle concaves. The shape of bite marks on the thalli was thought to be useful for identifying the fish species that caused the feeding damage of the cultured U. pinnatifida.
水産大学校研究報告 Volume 53 Issue 3
pp. 131 - 136
published_at 2005-03
Creators :
Murase Noboru
Mizukami Yuzuru
Kito Hitoshi
Fukumoto Yoriko
Minami Motohiro
Haraguchi Hiroko
Hirosawa Akira
Publishers : 水産大学校