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Development and early life history of the northern Sennet, Sphyraena borealis DeKay (Pisces, Sphyraenidae) reared in the laboratory
Houde, E.D. (1972). Development and early life history of the northern Sennet, Sphyraena borealis DeKay (Pisces, Sphyraenidae) reared in the laboratory. Fish. Bull. 70(1): 185-195
In: Fishery Bulletin. US Government Printing Office: Washington, D.C.. ISSN 0090-0656; e-ISSN 1937-4518
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| Abstract |
Eggs and larvae of S. borealis are described from laboratory-reared specimens. Fertilized eggs were collected on the edge of the Florida Current near Miami in Dec 1969. Larvae were 2.6 mm SL (standard length) at hatching and 13.5 mm SL at 21 days after hatching. Head and snout length increased rapidly relative to standard length as larvae grew. A fleshy tip developed on the lower jaw when larvae were longer than 5 mm SL. Teeth also first appeared at similar to 5 mm SL. Myomere and vertebral numbers were constant at 24. Ossification of the axial skeleton began in the cephalic region and proceeded caudally as growth occurred. Fin ray complements were complete at similar to 13.5 mm SL. Pigmentation during development is described and illustrated. Behavior of laboratory reared S. borealis larvae is discussed. Several wild-caught post-larvae were used to extend the descriptive series and helped to validate the identification of the laboratory-reared larvae. |
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