Role of free neuromasts in larval feeding of willow shiner Gnathopogon elongatus caerulescens Teleostei, Cyprinidae

Yukinori, Mukai (2006) Role of free neuromasts in larval feeding of willow shiner Gnathopogon elongatus caerulescens Teleostei, Cyprinidae. Fisheries Science, 72 (4). pp. 705-709. ISSN 0919-9268


Download (204kB) | Preview


It has been reported that the larvae of willow shiner Gnathopogon elongatus caerulescens have many free neuromasts on their body surface. This study examined the ability of the willow shiner larvae to feed on zooplankton by mechanoreception by the free neuromasts. Feeding experiments using untreated larvae and larvae treated with streptomycin, which impairs free neuromast function, were conducted under light and completely dark conditions. The larvae were put into Petri dishes, then nauplii of Artemia salina were introduced. The average number of Artemia eaten by the larvae was expressed as the average ingestion rate of Artemial/10 min. The ingestion rate of Artemia for untreated larvae was 12.3 under light conditions and 10.6 Artemial/10 min. even in complete darkness. The ingestion rate in the larvae treated with streptomycin was 11 under light conditions and only 0.8 Artemial/10 min under dark conditions. The low rate in the treated larvae under dark conditions must be due to impairment by the streptomycin. Therefore, the high ingestion rate for the untreated larvae under dark conditions would be surely dependent on mechanoreception. The results indicate that larval willow shiner is able to feed on zooplankton under limited light conditions.

Item Type: Article
Keyword: Feeding behavior, Free neuromasts, Gnathopogon elongatus caerulescens, Larvae, Willow shiner
Subjects: Q Science > QL Zoology > QL1-991 Zoology > QL605-739.8 Chordates. Vertebrates > QL614-639.8 Fishes
Department: INSTITUTE > Borneo Marine Research Institute
Depositing User: ADMIN ADMIN
Date Deposited: 30 Sep 2011 17:24
Last Modified: 19 Oct 2017 09:48

Actions (login required)

View Item View Item