Effect of feeding delay after self-feeder activation on growth performance and feeding behaviour of red porgy (Pagrus pagrus L. 1758): Application to submergible cages with surface hopper

TitleEffect of feeding delay after self-feeder activation on growth performance and feeding behaviour of red porgy (Pagrus pagrus L. 1758): Application to submergible cages with surface hopper
Publication TypeJournal Article
Year of Publication2011
AuthorsDoxa, CK, Papadakis IE, Divanach P, Kentouri M
JournalAquaculture Research
Volume42
Issue11
Pages1623 - 1631
KeywordsFeeding behaviour, Feeding delay, Growth performance, Pagrus pagrus, Submergible cages
Abstract

Red porgies (Pagrus pagrus) of 20.6±1.5g mean weight were reared in tanks under four delayed self-feeding conditions (0=control, 7, 30 and 90s) after rod activation. The time intervals were chosen to simulate the time taken for a commercial pelleted feed to transit the tube linking a surface-mounted feed hopper and the depth at which a cage might be submerged. Daily feeding rate, growth, food conversion index and condition factor were quite similar but fish behaviour differed among conditions. Fish remained close to the feeding point in the first two treatments (0 and 7s delay) but foraged more widely in the remaining treatments (30 and 90s delay), only reconsolidating around the feeding point a few seconds before feed was released. Results are discussed in relation to learning capacity and adaptation of fish to feeding behaviour flexibility, in order to develop reliable self-feeding systems suitable for submerged cages. © 2010 Blackwell Publishing Ltd.

URLhttp://www.scopus.com/inward/record.url?eid=2-s2.0-80053962222&partnerID=40&md5=848b57a457274d7cc1c5d0c1b04ead8a

User login