Reproductive Biology of the Dwarf Herring (Jenkinsia Lamprotaenia) in the Virgin Islands
Abstract:The temporal pattern of inshore aggregation, gonadal condition, and presumed spawning activity of a population of the tropical clupeiform, Jenkinsia lamprotaenia, were examined along the south shore of St. John, U.S. Virgin Islands. Gonad condition varied through the lunar month (P < 0.0001); ripe individuals occurred close to the full moon and nearly all individuals examined were spent after lunar day 21 (new moon = lunar day 1). Gonadosomatic index differed among lunar days (P < 0.0001), peaking just prior to the full moon each month, followed by a roughly constant rate of decline. Jenkinsia aggregations invariably moved offshore at dusk, therefore the results supported the hypothesis that inshore aggregations of Jenkinsia are comprised of prespawning individuals taking refuge during daylight.
Document Type: Research Article
Publication date: March 1, 1995
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