A description of the early life history stages of the kob, Argyrosomus hololepidotus (Pisces: Sciaenidae), from southern Africa
نویسنده
چکیده
The larval development of the kob, Argyrosomus holo/epidotus is described and illustrated from a series of specimens collected in Algoa Bay, South Africa. Larvae are moderately deep bodied (BD = 30% BL) with a convex dorsal profile and trunk tapering to a narrow caudal peduncle. The head is large, increasing from 22% BL in preflexion larvae to 35% BL in juveniles. Pre-anal length increases from 37% BL in preflexion larvae to >60% in juveniles. Notochord flexion occurs at 5-6 mm BL. Argyrosomus holo/epidotus larvae are characterized by melanophores behind the head, at the anal fin base, on the caudal fin, on the abdomen, in the angle of the jaw and at the jaw isthmus. Medio-Iateral pigmentation increases markedly in early juveniles. Osteological development is described from a series of cleared and stained specimens. By 14 mm BL all fins have the adult complement of spines and rays. The larvae of A. holo/epidotus are briefly compared with those of other Atlantic and Indo-Pacific sciaenids.
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This Article is brought to you for free and open access by the Ocean, Earth & Atmospheric Sciences at ODU Digital Commons. It has been accepted for inclusion in OEAS Faculty Publications by an authorized administrator of ODU Digital Commons. For more information, please contact [email protected]. Repository Citation Prista, Nuno; Gordo, Leonel; Costa, Jose L.; Costa, Maria J.; and Jones, C...
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