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The following schedule is subject to change (as of October 11, 2016). Please check back for updates. For more information about this meeting, go to: www.seafwa.org/conferences/2016
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Monday, October 17 • 4:20pm - 4:40pm
Fisheries. Are Asian Tiger Shrimp (Penaeus monodon) an Invasive Threat or Just a Paper Tiger? A Summary of the Tiger Shrimp’s Interactions with Both Native Prey and Predators

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AUTHORS: Jennifer M. Hill, Louisiana Tech University; Olivia Caretti, North Carolina State University; Kenneth L. Heck, Dauphin Island Sea Lab

ABSTRACT: Asian tiger shrimp (Penaeus monodon) have steadily appeared in commercial shrimp catches from North Carolina to Texas since 2011. Their consistent presence is ecologically concerning because the tiger shrimp’s large body size, broad diet, aggressive carnivory, and estuarine distribution suggest they may consume native shrimp or other crustaceans and that biotic resistance to invasion may be limited due to gape-limited fish predators. To assess these concerns, we used a series of mesocosm experiments to determine: a) the predation rates of tiger shrimp on adult and juvenile native shrimp; b) the behavioral responses of native shrimp to tiger shrimp, c) tiger shrimp diet preferences in estuarine environments, and; d) the abilities of red drum (Sciaenops ocellatus) predators to consume adult tiger shrimp. In contrast to the initial fears, predation rates on native shrimp species were generally low. However, despite their success at evading most tiger shrimp predation attempts, native shrimp often displayed avoidance behaviors that displaced them from their preferred habitats. Diet experiments also indicated juvenile blue crabs, an important commercial species, will be threatened by tiger shrimp as they were the preferred prey in multispecies diet experiments. Consequently, tiger shrimp will likely have context and species specific impacts on estuarine prey. Conversely, when tiger shrimp were offered as prey to red drum, tiger shrimp were consumed as often as similarly-sized native white shrimp suggesting native predators may provide some biotic resistance to the tiger shrimp invasion occurring on the Gulf Coast.

Monday October 17, 2016 4:20pm - 4:40pm
Riverview A

Attendees (6)