A Larval Gulf of Mexico Sturgeon (Acipenser oxyrhynchus desotoi) from the Apalachicola River, Florida

Abstract

Twelve Gulf of Mexico Sturgeon (Acipenser oxyrhynchus desotoi) were observed from the Apalachicola River, Florida, from 1976-1981. Seven were tagged and released with 2 being recaptured by anglers. Dates and water temperature of upriver, prespawntng spring migrations along with downriver, postspawning, fall migrations were obtained. One larval sturgeon was captured in the upper Apalachicola River at a temperature of 23.9°C, and a flow ing male was observed in the same area at a temperature of 20.6°C. An important sturgeon spawning section of the river has been identified for protection. Angler snagging of sturgeon in the upper Apalachicola River was monitored during 1981, revealing an estimated 35-40 sturgeon (average weight 33-45 kg) harvested. The Gulf of Mexico Sturgeon is currently listed as a threatened species by the Florida Committee on Rare and Endangered Plants and Animals. Two