Abstract
Allometric growth and ontogeny were studied in ide Leuciscus idus (L.) reared in laboratory conditions from 0 to 30 days post hatching (DPH), to define important steps in the species’ early life history. Based on the external morphology, eleven different stages during the early development of ide were identified (ES9a – JS1a; ES – embryonic stage, JS – juvenile stage). After a short period of rest, hatched individuals were visual feeders with a pelagic life. Organogenesis and allometric changes indicated that development priorities concerned feeding efficiency, respiration efficiency and locomotion performances. Also concluded was that the gradual changes observed in body proportions (which occurred across a wide range of body lengths) reflect the absence of abrupt changes in the behaviour and habitat and may also be considered as a gradual adaptation to life in flowing water.
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