2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2021 | 2:00 PM - 3:30 PM | ASSESSING THE CURRENT TRENDS AND CONTRIBUTING FACTORS TO SHIFTS IN DISTRIBUTION AND ABUNDANCE OF MACROBRACHIUM OF TEXAS. | Virtual Platform
ASSESSING THE CURRENT TRENDS AND CONTRIBUTING FACTORS TO SHIFTS IN DISTRIBUTION AND ABUNDANCE OF MACROBRACHIUM OF TEXAS.
Water control structures such as dams are significant obstacles for the freshwater prawn, Macrobrachium, on their migration to estuaries to complete their amphidromous life cycle and prevent juveniles from returning to higher reaches of rivers and streams to live out their adult life stage. Four species of Macrobrachium, once found throughout Texas waterways, have been extirpated from much of their former range and have been relegated to coastal plains in the last 30 years. Using comprehensive historical sampling events of Macrobrachium throughout Texas, and pulling data from the US Army Corps of Engineers’ National Inventory of Dams data set, we determined the impact of the dams and their key attributes on the probability of Macrobrachium being present upstream of these dams using mixed effect logistic regression models. We found that dams have had a significant impact on the Macrobrachium range since 1987, reducing their presence upstream of most dams. Due to morphological differences between species in Macrobrachium, dam attributes that influenced whether Macrobrachium would be present upstream of the dam varied for each species. Other tested anthropogenic factors were not as explanatory of Macrobrachium range loss as dams.
- Connectivity
- Habitat
- Conservation
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Presenters/Authors
Alexander Solis
(), VIMS, alexander.tr.solis@gmail.com;
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Fernando Carvallo
(), Texas A&M University–Corpus Christi, fcarvallo@islander.tamucc.edu ;
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James Hogan
(), Texas A&M University – Corpus Christi, james.hogan@tamucc.edu;
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Christopher Patrick
(), Virginia Institute of Marine Science (VIMS), cpatrick@vims.edu;
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