Shellfish of the Gulf of Mexico

Abstract

Four of the five top species in the Gulf of Mexico by value and poundage of landings are shellfish species. Gulf-wide, there are at least 49 officially recognized shellfish species: 28 are mollusks, 18 are crustaceans, and three are echinoderms. Of these, 16 shellfish species are taken within US waters, 46 from Mexico, and 6 from Cuba. The major focus is on the northern Gulf species of brown, pink, and white shrimp, Eastern oyster, and blue crab. All species are known to vary widely or fluctuate in population levels in accordance with varying environmental conditions from year to year. In addition, shrimp have also been affected by exogenous factors, such as rising fuel costs, market competition from imported shrimp, and fleet damage from hurricanes. Shrimp populations seem to be flourishing, while the shrimp fishery is in decline. The oyster fishery appears to be fairly stable overall, except for hurricane damage in some places and a decadal decline in stock assessment in Louisiana. Oyster reef habitat loss is a major concern. The blue crab fishery is quite variable from state to state with Louisiana showing continued growth and the largest fishery over the past two decades, while Texas shows a decrease. Gulf-wide, there is agreement that healthy bays and estuaries lead to more productive fisheries; thus, habitats need to be conserved or in some cases, restored.