Bradley M. Richardson

Bradley M. Richardson
Agricultural Research Service | ARS · Warmwater Aquaculture Research Unit

PhD - Forest Resources (Wildlife Fisheries and Aquaculture)

About

13
Publications
1,881
Reads
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10
Citations
Introduction
I am a Research Fish Biologist with the USDA-ARS. My research interests cover a wide breadth of aquatic ecology including macroinvertebrate and fish community structures, species interactions, predator-prey interactions, and general ecology and life histories. I also have a strong interest in educational research, particularly in how note-taking effects information retention in the classroom.
Additional affiliations
February 2021 - present
Agricultural Research Service
Position
  • Researcher
Description
  • Research biologist currently studying a variety of community ecology aspects in catfish aquaculture ponds, with particular emphasis on the interactions of bacterial and parasite pathogens and their hosts.
August 2016 - August 2020
Mississippi State University
Position
  • Graduate Teaching Assistant
August 2016 - present
Mississippi State University
Position
  • Graduate Teaching Assistant
Education
August 2016 - August 2020
Mississippi State University
Field of study
  • Forest Resources (Wildlife, Fisheries, and Aquaculture Concentration)
August 2013 - December 2015
Murray State University
Field of study
  • Biology
August 2010 - May 2013
Murray State University
Field of study
  • Fisheries/Aquatic Biology

Publications

Publications (13)
Article
Edwardsiella piscicida is a growing problem for catfish aquaculture in the southeastern United States, particularly in channel (Ictalurus punctatus) x blue (I. furcatus) catfish hybrids. Research has shown E. piscicida isolates recovered from farmed catfish in Mississippi form at least five discrete phyletic groups, with no apparent differences in...
Article
Full-text available
Proliferative Gill Disease (PGD), caused by the myxozoan Henneguya ictaluri, is an important parasitic disease in US catfish aquaculture. Continuous exposure of Channel Catfish Ictalurus punctatus to the actinospore stage of H. ictaluri results in a severe inflammatory response at the gills, leading to morbidity and death. Previous work indicates c...
Article
Full-text available
The ability of organisms to survive ingestion and digestion by their predators, or endozoochory, is a fascinating ecological phenomenon that can facilitate predator-mediated dispersal of prey and alter interaction strengths within ecological networks. However, the role of endozoochory in the context of invasive species is considered less often. Thr...
Article
Full-text available
Characterising myxozoan taxa parasitising fish hosts in catfish aquaculture ponds is crucial to understanding myxozoan community dynamics in these diverse and complex ecological systems. This work investigated the myxozoan fauna of the western mosquitofish, Gambusia affinis, a common, incidental species found in catfish aquaculture ponds in the sou...
Article
Full-text available
The bacterium Edwardsiella piscicida causes significant losses in global aquaculture, particularly channel (Ictalurus punctatus) × blue (I. furcatus) hybrid catfish cultured in the south‐eastern United States. Emergence of E. piscicida in hybrid catfish is worrisome given current industry trends towards increased hybrid production. The project obje...
Article
A strain of atypical Aeromonas hydrophila (aAh) has caused issues within the channel catfish Ictalurus punctatus industry of the southeastern United States since 2009. These atypical pathotypes cause acute mortality events resulting in catastrophic losses, as opposed to more chronic mortality and lesions seen in typical infections of motile aeromon...
Article
Full-text available
Monofilament gill nets have increased in popularity in recent decades and are often considered to be superior to multifilament gill nets; however, this claim is still contested by many researchers. Target species, habitat characteristics, and mesh characteristics can all affect the efficacy and selectivity of these nets. Increased angling interest...
Conference Paper
The many advantages to using benthic macroinvertebrates in freshwater biomonitoring are now well known and utilizing them in water quality monitoring has become a common practice around the world. Their ubiquity, diversity, and sensitivity to water quality make them excellent indicators of stream health. A study has been performed to identify assoc...
Poster
Full-text available
Southern Brook Lamprey, Ichthyomyzon gagei, is a primitive, non-parasitic filter feeder that lives in sandy streams in the Southeastern United States. They experience three life stages: (1) ammocoete, (2) metamorphosis, and (3) adult. This study aims to assess the presence of Southern Brook Lamprey at nine sites within a small watershed, Panther Cr...
Presentation
Full-text available
The ecology of many non-game fish species is understudied, thus little information is known about the life-history and population structure of diverse fishes. Very little is known about the spatial structure and abundances of Southern Brook Lamprey populations, and less is known about their early life-history and ontogeny outside of living for up t...
Presentation
Full-text available
The southern brook lamprey (Ichthyomyzon gagei) is a primitive, nonparasitic, filiform fish that inhabits streams of the Southeastern USA. Little is known about the species, especially in their cryptic larval form (i.e., ammocoetes) which burrow into fine sediment. The presence of southern brook lamprey populations suggest good stream quality; they...
Poster
Full-text available
The Southern Brook Lamprey (Ichthyomyzon gagei) is a primitive, jawless, filiform fish that possesses two distinct life stages: larval (i.e. “ammocoete”) and adult. This species inhabits many streams of the southeastern United States and spends the majority of its life as an ammocoete. Adults are well studied, but burrowing behavior and unknown mov...

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Projects

Projects (5)
Project
The study goal is to provide a validated tool to aid practitioners in the design and implementation of stream restoration projects along the East Gulf Coastal Plain Section in Northeast Mississippi. The objectives of the study are i) to evaluate geomorphic characteristics for reference reaches and streams within the East Gulf Coastal Plain Section in the northern areas of Mississippi and Alabama; ii) to develop relationships between flow and channel geometry characteristics to drainage basin area (Regional Curves); and iii) to validate proposed Regional Curves by comparing a stream restoration design developed using proposed and existing relationships for the Atlantic Plains physiographic region.
Project
This project seeks to answer two broad questions: (1) what methodologies are feasible when studying the SBL and (2) what is the ecology of SBL? A couple of studies have already begun. The first study sought to determine PIT tag retention and feasibility in ammocoete life stages of Southern Brook Lamprey (Ichthyomyzon gagei). A study underway aims to investigate small-scale movement patterns and habitat use of ammocoetes in a headwater stream.
Project
Provide hands-on learning and community engagement opportunities to underrepresented youth (Columbus HS; Columbus, MS) with an interest in STEAM (Science, Technology, Engineering, Arts, and Science).