Jeffrey W. Quinn

Paddlefish (Polyodon spathula) are a commercially-exploited species harvested primarily for their roe. e objectives of this study were to describe population characteristics of paddlefish in the lower Mississippi River (LMR) of Arkansas and use population-simulation so ware to deter- mine the length limit required to prevent recruitment over fishing by maintaining spawning potential ratios (SPR) over 30%. Paddlefish (n = 534) were collected from the LMR in cooperation with commercial fishers during the 2008-2011 commercial seasons. Lengths ranged 150-1095 mm eye-fork length and ages, 2-24...

Long-term tagging studies require a tag that has high retention and does not cause significant mortality. Retention and induced mortality were determined for advanced fingerling channel catfish (Ictalurus punctatus) tagged with Carlin dangler tags. We stocked three replicate 0.10-ha ponds with 100 tagged and 150 untagged channel catfish. Mean length ± SD of fish stocked was 232 ± 20 mm (range: 179-282 mm). Mean annual tag loss was 10% and ranged from 4% to 19% among ponds. Annual survival was 9% lower for tagged (mean = 52%) than unmarked control fish (mean = 61%). Annual growth of...