Daniel J. Daugherty

Texas Parks and Wildlife Department, 5103 Junction Highway, Mountain Home, TX 78058, USA

Evaluating Material Type and Configuration of Plastic Attractors on Fish Use in a Texas Reservoir

SEAFWA Journal Volume 7, March 2020

State fisheries agencies are increasingly conducting habitat enhancement projects due to reservoir aging and associated habitat degradation, and evaluations of the effectiveness of habitat introductions are crucial to ensure desired results. Artificial habitat structures built from plastics may last for decades, yet their effectiveness has been variable?possibly due to construction materials,shape, and placement. During 2014 and 2016, we compared fish use of artificial structures built from two plastic types (PVC and plastic mesh) deployed in clustered or linear configurations in Sam...

A Tale of Two Timescales: Using Otolith Microchemistry to Improve Our Understanding of Alligator Gar Movement in the Lower Trinity River, Texas

SEAFWA Journal Volume 6, March 2019
Fisheries Outstanding Technical Paper

Telemetry-based study of alligator gar (Atractosteus spatula) movement in the lower Trinity River, Texas, indicated that fish primarily re- mained within discrete home ranges less than 60 river kilometers (rkm), supporting the potential for local-scale management. However, the temporal scale of inference was limited (22 months), which may inadequately represent fish movements and home range size at the lifetime (i.e., ≥50 years) scale. Therefore, we used otolith microchemistry to examine the long-term movements of alligator gar (n = 59; total length range 1152 to 2420 mm, age range 4 to 60...

Reproductive Ecology of Alligator Gar: Identification of Environmental Drivers of Recruitment Success

SEAFWA Journal Volume 4, March 2017

Alligator gar (Atractosteus spatula) exhibit many characteristics of a periodic life-history strategy, including extended longevity, late maturity, high fecundity, and variable recruitment success. Observations of alligator gar spawning events indicate that recruitment in inland waters may be linked to spring and summer flood pulses and the availability of floodplain spawning habitats. However, because data have mostly come from observation and not formal experimentation, it is unknown whether these data represent true requirements or if they simply reflect conditions that were easily...

Population Dynamics of Alligator Gar in Choke Canyon Reservoir, Texas: Implications for Management

SEAFWA Journal Volume 2, March 2015
Fisheries Outstanding Technical Paper

Historical eradication efforts, increasing fishing pressure, and growing anthropogenic impacts have resulted in decreased abundance or extirpation of the alligator gar (Atractosteus spatula) throughout much of its historic distribution. Current population status has prompted states to actively manage stocks; however, efforts are hindered by a lack of data necessary to make informed management decisions. To begin addressing these data needs, we investigated alligator gar population dynamics and exploitation in Choke Canyon Reservoir, Texas. A total of 754 fish (total length [TL] range, 678...

Effects of Water-level Reductions on Littoral Habitat and Recreational Access in Brazos River Reservoirs, Texas

SEAFWA Journal Volume 2, March 2015

Reservoirs provide recreational opportunities along with water supplies, flood control, and hydroelectricity. Although recreational values are often considered in water management plans, reservoir regulators often lack data to evaluate the impacts of operations on fish habitat and recreational access. We partnered with the Brazos River Authority (BRA) and used reservoir bathymetry and side-imaging sonar data to investigate the effects of reservoir water-level changes on littoral habitat characteristics and boat access in 11 BRA reservoirs. Littoral area, coarse substrate, and submerged...

Angler Practices and Preferences for Managing Alligator Gar in Texas

SEAFWA Journal Volume 8, March 2021
Fisheries Outstanding Technical Paper - Jack Dequine Award

Some anglers have questioned Texas’ statewide one-a-day alligator gar (Atractosteus spatula) regulation. Simulations suggested other regulations might be preferred; however, angler support for other regulations was unknown. Texas Parks and Wildlife Department (TPWD) administered an online survey in summer 2018 to measure attitudes and preferences of Texas alligator gar anglers. Respondents who fished for alligator gar (= 3980) were primarily Texas resident anglers; 68% fished for gar using a rod-and-reel, but 23% used bow-and-arrow. Most anglers supported using length...