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SOUTHWESTERN ASSOCIATION of PARASITOLOGISTS 50Th Annual SOUTHWESTERN ASSOCIATION OF PARASITOLOGISTS 50th Annual Meeting Program & Abstracts April 20-22, 2017 The University of Oklahoma Biological Station Lake Texoma, Oklahoma Affiliate, American Society of Parasitologists SOUTHWESTERN ASSOCIATION OF PARASITOLOGISTS Officers President Nicholas Negovetich Department of Biology Angelo State University San Angelo, TX 76909 President-Elect (Program Officer) Michael Barger Natural Science Peru State College Peru, NE 68421 Immediate Past President Megan Wise de Valdez Program of Biology Texas A&M-San Antonio San Antonio, TX 78224 Secretary-Treasurer Tamara J. Cook Department of Biological Sciences Sam Houston State University Huntsville, TX 77341 Representative to ASP Council Matt Bolek Department of Integrative Biology Oklahoma State University Stillwater, OK 74078 AGENDA Thursday, April 20th, 2017 5:00–9:00 pm Registration Foyer of Dining Hall 6:30 pm Dinner Dining Hall 7:15 pm Presenters’ Meeting Library 8:30 pm Social Hour(s) Dining Hall Friday, April 21st, 2017 7:00-8:00 am Breakfast & Registration Dining Hall 8:05 am Opening Remarks Library 8:15-9:45 am Oral Presentations (#1–6) Library 9:45-10:00 am Break 10:00-11:30 am Oral Presentations (#7–12) Library 11:30-11:45 am Special Presentation Library 11:45-1:00 pm Lunch Dining Hall 1:15-2:15 pm Oral Presentations (#13–16) Library 2:15-2:30 pm Break 2:30-3:30 pm Oral Presentations (#17–20) Library 3:30-4:00 pm Break 4:00-5:30 pm Panel Discussion, SWAP 50th & Refreshments Library 5:30-6:30 pm Dinner Dining Hall 6:30-8:00 pm SWAP Business Meeting Library 8:00-9:00 pm President’s Reception & Poster Session (#21-33) Dining Hall 9:00-10:00 pm Social Hour(s) Dining Hall Saturday, April 22nd, 2017 7:30–8:30 am Breakfast Dining Hall 8:45-10:00 am Oral Presentations (#34-38) Library 10:00 am Closing Remarks & Adjournment Library ABSTRACTS WITH A “U” ARE UNDERGRADUATE STUDENT PAPERS IN THE COMPETITION; THOSE WITH A “G” ARE GRADUATE STUDENT PAPERS IN THE COMPETITION. UNLESS NOTED, SPEAKER IS FIRST AUTHOR LISTED. Donald V. Moore, President of SWAP, 1974. Courtesy of Harold W. Manter Laboratory of Parasitology. Friday, April 21, 2017 Oral Presentations LIBRARY 8:05 am Opening Remarks President NICHOLAS NEGOVETICH Oral Presentations #1–6 Chairpersons KAYLEE HERZOG, University of Kansas RYAN SHANNON, Oklahoma State University 8:15am (G) 1. Land Ho! Field and Experimental Observations on A New Gordius sp. (Nematomorpha: Gordiida) With the First Documented Terrestrial Life Cycle for the Phylum. C, Anaya1, B. Hanelt2 and M. G. Bolek1. 1Department of Integrative Biology, Oklahoma State University, Stillwater, OK. 2Department of Biology, University of New Mexico, Albuquerque, NM. All gordiids have complex life cycles and are considered aquatic in their free-living phase. However, recently we discovered a new Gordius sp. in Oklahoma which occurs in terrestrial habitats. To investigate the transmission of this Gordius sp., during 2014-2017 a total of 1,455 adult free-living worms were collected from lawns, open fields, and road gutters from 20 sites in Payne Co., OK. Surveys of earthworms and land snails from locations where adult free-living worms were observed indicated they were commonly infected with Gordius-type cysts suggesting gordiid larvae are present in the soil. To test our field observations, we performed comparative laboratory assays on egg laying behavior of the new Gordius sp. collected from terrestrial environments and the aquatic gordiid, Paragordius varius. As expected, both gordiid species deposited egg strings when female worms were placed in water. However, when worms of both species were placed on soil, all individuals of the aquatic P. varius dried and died; whereas 80% of the Gordius sp. individuals collected from terrestrial habitats burrowed within minutes into the soil. More importantly, some female Gordius sp. began depositing egg strings within days of burrowing into the soil. Examination of the eggs of this species indicates they are unlike the eggs of any other hairworm species and contain double membranes suggesting these eggs may be resistant to desiccation. Taken together, our observations and experiments strongly suggest that this species represents the first documented hairworm species with a terrestrial life cycle. 8:30am (G) 2. Survey Detecting the Variability of Small Subunit RNA Gene of Kneallhazia solenopsae (Microsporidia: Thelohanidae) in the Red Imported Fire Ant, Solenopsis invicta, in South Texas. L. M. Bassett, J. A. Brady, K. K. Herrmann, and F. L. Mitchell, Department of Biological Sciences, Tarleton State University, and Texas A&M Agrilife, Stephenville, Texas. The Red Imported Fire Ant, Solenopsis invicta, is an invasive species in the southeastern United States, causing negative impacts on the agriculture industry, environment, and economy. A common pathogen is the microsporidium, Kneallhazia solenopsae. There are several different K. solenopsae SSU gene variants (SSUGV): North America (NA), Widely Distributed (WD), Mexico (MEX), and USA. The SSUGV are not randomly distributed and appear to be dispersed by geographical location. It is unclear what would cause SSUGV localization, whether that be ant genetics or environmental factors. The objectives in this study were to determine the prevalence and geographic distribution of different K. solenopsae SSUGV in south Texas. Fifty-eight colonies were sampled from 32 counties in south Texas. After DNA extraction and examination by PCR, the samples were prepared for Next Generation Sequencing (NGS). The NGS data were analyzed with DNAStar Lasergene. Five counties had NA (5 samples) as the major SSUGV, 12 counties (24 samples) were determined to have WD, and another 12 (15 samples) did not have a significant number of K. solenopsae SSU gene variants (Negative). The final three counties were as follows: one county had WD (2 samples) and Negative (2 samples), and 2 counties had NA (8 samples) and Negative (2 samples). The prevalence for the total number of NA sequences was 34.1%, WD was 42.4%, MEX was 11.6%, USA was 0.3% and 11.7% were negative. The NA SSUGV appears to be more geographically localized than the other variants. It may be possible to use bait containing NA K. solenopsae spores from south Texas to infect colonies in other parts of Texas. If those ant colonies become infected and it is determined that the NA SSUGV is present, then the bait will be determined as successful. 8:45am (G) 3. Range Expansion of an Exotic Asian Snail (Melanoides tuberculata) Into Central Texas Rivers, and the Parasitological Consequences Thereof. S. F. Harding, D. Rodriguez, D. G. Huffman, and J. Jackson; Aquatic Station, Department of Biology, Texas State University, and Bio- West, Inc. The invasive snail Melanoides tuberculata (Thiaridae) has been established in Texas since the 1960s. Prior to 2009, all known distributions of M. tuberculata in Central Texas were restricted to thermally stable spring runs. Previous studies have experimentally established the lethal thermal minimum and maximum for this species and suggest survival outside stenothermal conditions would be unlikely. In 2012, snails were detected outside of these known thermal ranges in waters with sustained temperatures much colder than the experimentally determined lethal thermal minimum. The objective of this study was to assess phenotypic and genetic differences between snail populations found in thermally stable and unstable habitats. Multivariate analyses were used to qualitatively and quantitatively partition variation in conch morphology within and among several Texas populations. A subset of snails was subjected to molecular analyses using primers targeting the mitochondrial 16S rRNA gene. Phylogenetic analyses of molecular data revealed that the snails from thermally ambient habitats are genetically divergent from snails found in thermally stable habitats. Genetic diversity of local snail populations was compared against global M. tuberculata 16s rRNA sequence data available from GenBank. This study detected evidence for multiple M. tuberculata introduction events in Texas, and it also suggests stenothermal restrictions are not applicable to all haplotypes recognized as Melanoides tuberculata. 9:00am (U) 4. Parasite assemblages of freshwater fishes from two backwater habitats along the Neches River of Southeast, Texas, USA. M. J. Shepherd and H. R. Yoder. Department of Biology, Lamar University, Beaumont, TX. A total of 32 fish representing 7 species from family Centrarchidae (Lepomis macrochirus, L. megalotis, L. microlophus, L. gulosus, Pomoxis annularus, Micropterus salmoides, M.punctulatus) 1 species from family Lepisosteidae (Lepisosteus oculatus) and 2 species from family Catostomidae (Minytrema melanops, Carpiodes carpio) were collected from two locations on the Neches River on three sampling dates (July, 25 2016, August, 2 2016, and August, 10 2016). Hosts were caught, placed on ice and transported back to the lab, necropsied, and examined for endo and ectoparasites. Thirty fish were (94%) were infected with one or more parasite. A total of 935 parasite individuals were found representing 4 phyla. These included Arthropoda (Copepoda), Platyhelminthes (Trematoda, and Monogenea) Nematoda, and Mollusca (Glochidia). At the time of this abstract, the project is ongoing and parasites are being identified to species or lowest possible taxonomic unit. Centrarchid hosts, collectively made up the largest numbers of fish hosts sampled and revealed the most speciose parasite communities. Centrarchid
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