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Articles 6901 - 6930 of 21430
Full-Text Articles in Entire DC Network
Necturus Alabamensis, Roger W. Barbour
Necturus Alabamensis, Roger W. Barbour
Roger W. Barbour Slide Collection
Necturus alabamensis
Necturus Maculosis, Roger W. Barbour
Necturus Maculosis, Roger W. Barbour
Roger W. Barbour Slide Collection
Necturus maculosis
Notophthalmus Dorsalis, Roger W. Barbour
Notophthalmus Dorsalis, Roger W. Barbour
Roger W. Barbour Slide Collection
Notophthalmus dorsalis
Notophthalmus Viridescens, Roger W. Barbour
Notophthalmus Viridescens, Roger W. Barbour
Roger W. Barbour Slide Collection
Notophthalmus viridescens
Notophthalmus V. Dorsalis, Roger W. Barbour
Notophthalmus V. Dorsalis, Roger W. Barbour
Roger W. Barbour Slide Collection
Notophthalmus v. dorsalis
Plethodon Cinereus, Roger W. Barbour
Plethodon Cinereus, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon cinereus
Plethodon Cinereus, Roger W. Barbour
Plethodon Cinereus, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon cinereus
Plethodon Cinereus, Roger W. Barbour
Plethodon Cinereus, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon cinereus
Plethodon Dorsalis, Roger W. Barbour
Plethodon Dorsalis, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon dorsalis
Plethodon Dorsalis, Roger W. Barbour
Plethodon Dorsalis, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon dorsalis
Plethodon Glutinosus, Roger W. Barbour
Plethodon Glutinosus, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon glutinosus
Plethodon Kentucki, Roger W. Barbour
Plethodon Kentucki, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon kentucki
Plethodon Welleri, Roger W. Barbour
Plethodon Welleri, Roger W. Barbour
Roger W. Barbour Slide Collection
Plethodon welleri
Pseudotriton Ruber, Roger W. Barbour
Pseudotriton Ruber, Roger W. Barbour
Roger W. Barbour Slide Collection
Pseudotriton ruber
Hyla-Acris Mix, Roger W. Barbour
Identification Of Shark Species In Commercial Products Using Dna Barcoding, Rosalee S. Hellberg, Rachel B. Isaacs, Eduardo L. Hernandez
Identification Of Shark Species In Commercial Products Using Dna Barcoding, Rosalee S. Hellberg, Rachel B. Isaacs, Eduardo L. Hernandez
Food Science Faculty Articles and Research
Sharks are harvested globally and sold in a variety of commercial products. However, they are particularly vulnerable to overfishing and many species are considered protected or endangered. The objective of this study was to identify species in various commercial shark products and to assess the effectiveness of three different DNA barcoding primer sets. Thirty-five products were collected for this study, including fillets, jerky, soup, and cartilage pills. DNA barcoding of these products was undertaken using two full-length primer sets and one mini-barcode primer set within the cytochrome c oxidase subunit (COI) gene. Successfully sequenced samples were then analyzed and identified …
Multi-Element Fingerprinting Of Waters To Evaluate Connectivity Among Depressional Wetlands, Yuxiang Yuan, Xiaoyan Zhu, David M. Mushet, Marinus L. Otte
Multi-Element Fingerprinting Of Waters To Evaluate Connectivity Among Depressional Wetlands, Yuxiang Yuan, Xiaoyan Zhu, David M. Mushet, Marinus L. Otte
United States Geological Survey, Northern Prairie Wildlife Research Center: Publications
Establishing the connectivity among depressional wetlands is important for their proper management, conservation and restoration. In this study, the concentrations of 38 elements in surface water and porewater of depressional wetlands were investigated to determine chemical and hydrological connectivity of three hydrological types: recharge, flow-through, and discharge, in the Prairie Pothole Region of North America. Most element concentrations of porewater varied significantly by wetland hydrologic type (p < 0.05), and increased along a recharge to discharge hydrologic gradient. Significant spatial variation of element concentrations in surface water was observed in discharge wetlands. Generally, higher element concentrations occurred in natural wetlands compared to wetlands with known disturbances (previous drainage and grazing). Electrical conductivity explained 42.3% and 30.5% of the variation of all element concentrations in porewater and surface water. Non-metric multidimensional scaling analysis showed that the similarity decreased from recharge to flowthrough to discharge wetland in each sampling site. Cluster analysis confirmed that element compositions in porewater of interconnected wetlands were more similar to each other than to those of wetlands located farther away. Porewater and surface water in a restored wetland showed similar multi-element characteristics to natural wetlands. In contrast, depressional wetlands connected by seeps along a deactivated drain-tile path and a grazed wetland showed distinctly different multi-element characteristics compared to other wetlands sampled. Our findings confirm that the multi-element fingerprinting method can be useful for assessing hydro-chemical connectivity across the landscape, and indicate that element concentrations are not only affected by land use, but also by hydrological characteristics.
Nerodia Erythogaster Flavigaster, Roger W. Barbour
Nerodia Erythogaster Flavigaster, Roger W. Barbour
Roger W. Barbour Slide Collection
Nerodia erythogaster flavigaster
Nerodia Erythogaster, Roger W. Barbour
Nerodia Erythogaster, Roger W. Barbour
Roger W. Barbour Slide Collection
Nerodia erythogaster
Nerodia F. Confluens, Roger W. Barbour
Nerodia F. Confluens, Roger W. Barbour
Roger W. Barbour Slide Collection
Nerodia f. confluens
Nerodia F. Confluens, Roger W. Barbour
Nerodia F. Confluens, Roger W. Barbour
Roger W. Barbour Slide Collection
Nerodia f. confluens
Nerodia Sipdeon, Roger W. Barbour
Nerodia F. Pictiventris, Roger W. Barbour
Nerodia F. Pictiventris, Roger W. Barbour
Roger W. Barbour Slide Collection
Nerodia f. pictiventris
Opheodrys Aestivus, Roger W. Barbour
Opheodrys Aestivus, Roger W. Barbour
Roger W. Barbour Slide Collection
Opheodrys aestivus
Regina Septemvittata, Roger W. Barbour
Regina Septemvittata, Roger W. Barbour
Roger W. Barbour Slide Collection
Regina septemvittata
Seminatrix Pygaea, Roger W. Barbour
Seminatrix Pygaea, Roger W. Barbour
Roger W. Barbour Slide Collection
Seminatrix pygaea
Tantilla Coronata, Roger W. Barbour
Tantilla Coronata, Roger W. Barbour
Roger W. Barbour Slide Collection
Tantilla coronata
Storeria Dekayi Victa, Roger W. Barbour
Storeria Dekayi Victa, Roger W. Barbour
Roger W. Barbour Slide Collection
Storeria dekayi victa
Thamnophis Butleri, Roger W. Barbour
Thamnophis Butleri, Roger W. Barbour
Roger W. Barbour Slide Collection
Thamnophis butleri
Thamnophis Radix, Roger W. Barbour