LITTLE ROCK — Thirty juvenile Alabama shad are striking out on a 650-mile journey from the Ouachita River in southwest Arkansas to the Gulf Coast and beyond, and for the first time in history, biologists with the Arkansas Game and Fish Commission will be tagging along.
The Alabama shad is ranked as the fourth-rarest fish in Arkansas and is being considered as a candidate for the Endangered Species Act by the U.S. Fish and Wildlife Service. Each year Alabama shad spawned in the Ouachita River embark on a quest to reach salt water of the Gulf Coast. The fish is a mere 7-inch juvenile when it begins this trek, which leads it through many dangerous obstacles, including four locks and dams built for barge traffic.
Biologists know shockingly little about their life cycle aside from the endpoints of this amazing journey. Do they make this journey multiple times? Are there critical areas they visit along the way? How do they get past the dams? The questions surrounding this species are as vast as the waters it travels.
According to Jeff Quinn, AGFC River and Stream Program Supervisor, the Alabama shad is the only anadromous fish species in Arkansas — meaning it spawns in The Natural State and travels to salt water in the ocean as a component of its life cycle. One other species, the American eel, makes a similar migration but in reverse, spawning in the salt water of the ocean and traveling to fresh water in Arkansas during its life before returning to the Sargasso Sea.
Unraveling the secrets of this fish’s life cycle has been the largest obstacle in its conservation. Adult shad are extremely elusive and fragile, thwarting many previous tracking studies.
AGFC biologists have turned their attention to the juveniles through a groundbreaking effort. Last fall, they captured 30 young shad and implanted them with transmitters to track their migration. The transmitters, implanted by AGFC veterinarians, will coordinate with a series of hydrophones to “ping” each shad’s location as it passes nearby.
This is the first time such a study has been attempted on juvenile Alabama shad. The species is notoriously fragile and prone to stress from temperature changes and handling trauma.