Early development of the Amur sleeper (Perccottus glenii, Dybowski, ۱۸۷۷): a remarkable invasive species in Eurasia
Publish place: Iranian Journal of Fisheries Sciences، Vol: 11، Issue: 3
Publish Year: 1391
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JIFRO-11-3_011
تاریخ نمایه سازی: 22 اسفند 1400
Abstract:
To investigate the ontogeny of Perccottus glenii, embryonic, larval and juvenile development of P. glenii were examined under captive
condition. The fertilized eggs with numerous oil droplets were orange-pink in
color, prolate spherical in shape and had average length of ۳.۳۲±۰.۱۴ mm and width of ۱.۲۴±۰.۰۴ mm. From fertilization to hatching,
the ontogenesis of the fish spent more than ۲۰۰ h, and the process of embryonic
development was divided into ۲۵ stages based on the morphological
characteristics. The newly hatched larvae, with well-developed swim bladder and
pectoral fins, measured ۵.۰۷±۰.۱۸mm
in total length. Initial feeding occurred at day ۲ after hatching (AH) and the
complete absorption of yolk sphere was observed ۳ days after hatching. At day
۴۰ AH, scales and vertical pigment were found to be appear. Scales covered the
entire body and all fins were well developed ۷۰ days AH, at which time the
juveniles reached the young stage with a total length (TL) of ۲۴.۷۴±۴.۲۸ mm. At day ۱۴۰ AH, The fry with a TL
of ۲۹.۵۷±۴.۶۵ mm, were
morphologically similar to the adults except for size.
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