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The Use of Chorionic Gonadotropin to Induce Laboratory Spawning of the Atlantic Croaker, Micropogon undulatus, with Notes on Subsequent Embryonic Development

Douglas P. Middaugh and Ruth L. Yoakum
Chesapeake Science
Vol. 15, No. 2 (Jun., 1974), pp. 110-114
Stable URL: http://www.jstor.org/stable/1351269
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Use of Chorionic Gonadotropin to Induce Laboratory Spawning of the Atlantic Croaker, Micropogon undulatus, with Notes on Subsequent Embryonic Development
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Abstract

We studied the feasibility of spawning and rearing the Atlantic croaker, Micropogon undulatus, in the laboratory. Adult croaker were collected during mid-October, 1972, placed in flowing seawater holding tanks, and administered injections of either 125 or 250 I. U. of chorionic gonadotropin three times per week for three weeks. An apparent period of latency (6-7 days) was observed between the initial hormone injections and successful ovulation. Fish dosed at the 125 I. U. level were successfully spawned and eggs and larval development monitored. Larvae were carried through to 4 days after hatching when mass mortalities occurred, apparently as a result of nutritional deficiencies.

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