Chemoreception and vertical movement in planktonic yolk-sac larvae of red sea bream Pagrus major

Tanaka, Yuuzi and Mukai, Yukinori and Takii, Kenzi and Kumai, Hidemi (1991) Chemoreception and vertical movement in planktonic yolk-sac larvae of red sea bream Pagrus major. Journal of Applied Ichthyology, 7 (3). pp. 129-135. ISSN 0175-8659 (P), 1439-0426(O)

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Abstract

The capability of planktonic yolk-sac larvae of red sea bream Pagrus major in detecting food was examined in the laboratory to ascertain basic knowledge on the early life history of this marine fish. After infrequent vertical burst swimming followed by slight rising or sinking, the larvae remained motionless within thin layers of concentrated food extract (rotifer, Brachionus plicatilis). At the moment of hatching, the larvae already have receptor cells with several cilia arranged radially in their open nostrils. Thus it is likely that by means of their vertical movement they are capable of sensing the thin food patch layer. We suggest that planktonic larvae of Pagrus major are capable of detecting and remaining within food patches even before the onset of feeding. The onset of food detection in the earlier stages may be, to some extent, the more efficient strategy for larval survival and growth because this ability could contribute to a reduction in energy consumption.

Item Type:	Article (Journal)
Additional Information:	6616/11598
Subjects:	S Agriculture > SH Aquaculture. Fisheries. Angling
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Institute of Oceanography and Maritime Studies
Depositing User:	Dr. Yukinori Mukai
Date Deposited:	14 May 2012 08:22
Last Modified:	14 May 2012 08:22
URI:	http://irep.iium.edu.my/id/eprint/11598

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