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Full-Text Articles in Life Sciences
Unusual Accumulation Of Bat Remains From An Ozark Cave, David A. Saugey, R. H. Baber, V. Rick Mcdaniel
Unusual Accumulation Of Bat Remains From An Ozark Cave, David A. Saugey, R. H. Baber, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Fishes Of The Caddo River, Arkansas, After Impoundment Of Degray Lake, Michael R. Dewey, Thomas E. Moen
Fishes Of The Caddo River, Arkansas, After Impoundment Of Degray Lake, Michael R. Dewey, Thomas E. Moen
Journal of the Arkansas Academy of Science
Fifty-five collections of fishes were made with small-mesh seines and electrofishing gear in the Caddo River and four of its tributaries during 1974-75. Eighty-two species representing 17 families were collected; 14 of the species had not previously been reported from the Caddo River.
Movements Of Channel Catfish And Flathead Catfish In Beaver Reservoir, Northwest Arkansas, Thomas O. Duncan, Milton R. Myers Jr.
Movements Of Channel Catfish And Flathead Catfish In Beaver Reservoir, Northwest Arkansas, Thomas O. Duncan, Milton R. Myers Jr.
Journal of the Arkansas Academy of Science
A total of 497 channel catfish, Ictalurus punctatus, and flathead catfish, Pylodictis olivaris. were tagged in Beaver Reservoir during two November-April tagging periods (1967-68 and 1968-69); total recaptures were 9.5 and 11.7% respectively. The longest time between tagging and recapture was 1622 days (4.4 years) for channel catfish and 494 days (1.4 years) for flathead catfish. The longest distances traveled were 43.1 km by a channel catfish and 44.3 km by a flathead catfish. Fisherman returns indicated that catfish were caught primarily from April through July. The many recaptures, even after long periods, within 1.6 km of the tagging point, …
Some Physiological And Morphological Adaptations For Underwater Survival In Natrix Rhombifera And Elaphe Obsoleta, Dennis A. Baeyens, Chris T. Mcallister, Leland F. Morgans
Some Physiological And Morphological Adaptations For Underwater Survival In Natrix Rhombifera And Elaphe Obsoleta, Dennis A. Baeyens, Chris T. Mcallister, Leland F. Morgans
Journal of the Arkansas Academy of Science
The submergence times of the diamondback water snake (Natrix rhombifera) and black rat snake (Elaphe obsoleta) were compared. Both species could easily survive underwater for periods greater than one hour. Furthermore, there was no difference in time of underwater survival in the two species. Some physiological and morphological parameters which may contribute to the ability of N. rhombifera and E. obsoleta to remain submerged were also examined. E. obsoleta was found to have a greater lung volume and larger and more numerous alveoli than N. rhombifera. Both species demonstrated a bradycardia upon submergence but it was less pronounced than the …
Influence Of Lead, An Environmental Pollutant On Metamorphosis Of Rana Utricularia (Amphibia: Ranidae), Gloria L. Yeung
Influence Of Lead, An Environmental Pollutant On Metamorphosis Of Rana Utricularia (Amphibia: Ranidae), Gloria L. Yeung
Journal of the Arkansas Academy of Science
The influence of lead, an environmental pollutant on metamorphosis of Rana utricularia, was examined in this study. Larvae of stage XI (Taylor and Kollros, 1946), beginning of the premetamorphic stage, were exposed to lead concentrations of 0.1 ppm, 0.5 ppm, 1.0 ppm and 1.5 ppm for 106 days. The untreated larvae served as controls. Larvae were observed from early limb bud stage, stage X, through the protrusion of the forelimbs, stage XX. Neither the sequence of developmental events nor the gross external and internal morphology was altered by lead. However, lead prolonged the time of metamorphosis by delaying the completion …