OSU Journals (Oklahoma State University)
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First Record of Aethycteron nigrofasciatus (Harrises, 1962) (Monogenea: Dactylogyridae) from the Dusky Darter, Percina sciera (Swain) (Perciformes: Percidae), in Oklahoma
Get PDFVirtually nothing is known regarding parasites of the Dusky Darter, Percina sciera. The only parasite reported to date from this host is a piscicolid leech. Here, we report Aethycteron nigrofasciatus on the gills of this host from the Little River Drainage of the Red River System of southeastern Oklahoma. Morphometric characters of A. nigrofasciatus from P. sciera from the state conform closely to those previously reported from its only other known host, the Blackbanded Darter, Percina nigrofasciata in Mississippi. Both possess a unique curved male copulatory organ with a spine on the distal half of the shaft and a flared distal end. Aethycteron nigrofasciatus on P. sciera represents a new host record and the first geographic distributional record of this monogenean from west of the Mississippi River
New Host and Distributional Records for Helminth and Arthropod Parasites of Birds (Aves: Strigiformes; Accipitriformes; Piciformes; Passeriformes) from Southeastern Oklahoma
Get PDFBetween November 2020 and March 2022, 14 individual salvaged birds (11 species) within four orders and nine families from McCurtain County, Oklahoma, were examined for ecto-and endoparasites. Avian orders (families) and host species included: Strigiformes (Strigidae): barred owl (Strix varia) and two great-horned owls (Bubo virginianus); Accipitriformes (Accipitridae): red-tailed hawk, (Buteo jamaicensis); Piciformes (Picidae): red-headed woodpecker (Melanerpes erythrocephalus) and downy woodpecker (Dryobates pubescens); Passeriformes (Turdidae, Troglodytidae, Mimidae, Parulidae, Paridae, Icteridae): two American robins (Turdus migratorius), Carolina wren (Thryothurus ludovicianus), brown thrasher (Toxotoma rufum), two yellow warblers (Setophaga petechia), tufted titmouse (Baeolophus bicolor), and common grackle (Quiscalus quiscula). Eighteen parasite taxa were found in the birds examined, including four digenean trematodes, four cestodes, three nematodes, two acanthocephalans, and five lice. We document five new host and 14 new geographic distributional records for the parasites from select birds of the state
Second Report of Isospora boulengeri from Satanic Leaf-Tailed Geckos, Uroplatus phantasticus (Sauria: Gekkonidae), with a New Host Record for Choleoeimeria (Apicomplexa: Eimeriidae) and a Summary of the Choleoeimerians from the Gekkonidae
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Comparison of Taxi-in and Taxi-out Times by Airport Hub Classification and Number of Hot Spots
Get PDFTaxi time has been identified as a significant factor that may affect airport capacity, congestion, fuel burn, and emissions. Reducing taxi time at airports may contribute to increasing airport efficiency and capacity, and reducing fuel consumption and emissions. In this paper, average quarter-hour taxi-time data from a sample of 33 U.S. airports was analyzed to explore the difference between taxi-out time and taxi-in time. Using parametric and non-parametric statistical tests, this research found that the mean and median taxi-out time was significantly different from the mean and median taxi-in time for each of the three airport hub classifications (small, medium, large), each of the six numbers of airport hot spots (0, 1, 2, 3, 4, 5), and for each combination of hub classification and numbers of hot spots. The results of this research may provide a better understanding of taxi time at small, medium, and large hubs airports with hot spots. The results may be useful to airport managers and decision makers to improve airport efficiency when faced with competing airport improvement initiatives or projects