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JNAFS

01

Paul Yuschak

Little Harbor Laboratory, Inc.
69 Andrews Road, Guilford, Connecticut, USA 06437

Source - Journal of Northwest Atlantic Fishery Science, Volume 6(1): 65-85
ISSN-0250-7408

Abstract

Fecundity of the striped searobin (Prionotus evolans) was estimated from the ovaries of 28 fish (3 to 5 years) to range from 90 000 to 218 000 eggs, with some indication of increase with length, weight and age. The preserved, fertilized eggs ranged in diameter from 0.21 to 0.57 mm. Early development is described from eggs and larvae that were reared at temperatures of 19.0° to 20.4°C. The fertilized eggs ranged in diameter from 1.05 to 1.25 mm and contained 16-37 oil globules, which moved to various locations in the egg during development. Gastrulation occurred at 15 hr, early embryo at 25 hr and first hatching at 80 hr. Characteristic pigment consists of a transverse band which is located about halfway between the vent and notochord tip in late-stage embryos and yolk-sac larvae. Newly-hatched larvae averaged 2.8 mm NL and flexion occurred at 6.0-6.9 mm. The pectoral fin is present at hatching and all fins are complete at 7.8 mm SL. Head spines are first evident at 6.2 mm NL, and they display prominent features during the course of development. Osteological development is nearly complete at 18.3 mm SL Comparison of P. evolans with recently-published information on P. carolinus reveals differences in embryo pigmentation, head spine development, teeth formation and number of anal fin rays.

Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - June 1985
Publication Type - Journal Article

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