This study was carried out to examine morphological changes and allometric growth patterns in Nile tilapia (Oreochromis niloticus (L., 1758)), as a valuable aquaculture species, during early developmental stages (from hatching up to 40 days after hatching) under rearing conditions. For extracting morphological data, a total of 160 larval specimens were collected in different days, then the left side of the specimens was photographed, and eight morphometric characters including body height, caudal peduncle height, eye diameter, head length, postorbital length, standard length, snout length and total length were measured. The larvae are born with developed feeding system and vision (jaws and eyes) that able them to see and take the food items immediately after hatching. These morphological changes in head (snout and eye) and caudal regions may be related to changes in feeding and swimming (to avoid predators) habits of this species.
کلید واژگان :ontogeny, allometry, inflection, growth pattern
ارزش ریالی : 300000 ریال
با پرداخت الکترونیک