Somatic growth, survival, feed utilization and starvation in European elverAnguilla anguilla(Linnaeus) under two different photoperiods

• DOI: 10.1111/j.1365-2109.2008.02129.x
• Publication Date: 2008-12-19T19:29:41Z
• Authors: A Rodríguez; F Castelló-Orvay; Enric Gisbert
• Keywords: Darkness

The aim of the study was to determine effect two photoperiod regimes under artificial conditions on growth performance and survival in European eel Anguilla anguilla during transition from glass elver. fish were held 12-h-light:12-h-dark (12L:12D) continuous darkness (DD) fed fast trials lasting 80 days. Fed kept dark showed higher somatic growth, a better feed conversion ratio, protein lipid content, with significant differences between treatments. Dark environment increased rate comparison exposed 12L:12D, which eels lower rates greater variations size. Fasted suffered loss body mass both photoperiods at end experimental phase, but 12L:12D lost more mass. These results indicate that is key factor eel–elver stage, may contribute optimizing early stages culture.