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Filter Total Items: 30,911
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Year Published: 2016

Spatial and temporal variability in estuary habitat use by American alligators

Estuarine habitat occupied by Alligator mississippiensis, a primarily freshwater species, is spatially and temporally heterogeneous largely due to a salinity gradient that fluctuates. Using long-term night light survey data, we examined seasonal patterns in alligators’ habitat use by size classes in midstream and downstream estuary...

Fujisaki, Ikuko; Hart, Kristen M.; Cherkiss, Michael S.; Mazzotti, Frank J.; Beauchamp, Jeffrey S.; Jeffery, Brian M.; Brandt, Laura A.

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Year Published: 2016

First direct confirmation of grass carp spawning in a Great Lakes tributary

Grass carp (Ctenopharyngodon idella), an invasive species of Asian carp, has been stocked for many decades in the United States for vegetation control. Adult individuals have been found in all of the Great Lakes except Lake Superior, but no self-sustaining populations have yet been identified in Great Lakes tributaries. In 2012, a commercial...

Embke, Holly S.; Kocovsky, Patrick M.; Richter, Catherine A.; Pritt, Jeremy J.; Christine M. Mayer; Qian, Song

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Year Published: 2016

Internal loading of phosphorus in western Lake Erie

This study applied eight techniques to obtain estimates of the diffusive flux of phosphorus (P) from bottom sediments throughout the western basin of Lake Erie. The flux was quantified from both aerobic and anaerobic incubations of whole cores; by monitoring the water encapsulated in bottom chambers; from pore water concentration profiles measured...

Matisoff, Gerald; Kaltenberg, Eliza M.; Steely, Rebecca L.; Hummel, Stephanie K.; Seo, Jinyu; Gibbons, Kenneth J.; Bridgeman, Thomas B.; Seo, Youngwoo; Behbahani, Mohsen; James, William F.; Johnson, Laura; Doan, Phuong; Dittrich, Maria; Evans, Mary Anne; Chaffin, Justin D.

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Year Published: 2016

Island characteristics within wetlands influence waterbird nest success and abundance

Coastal waterbird populations are threatened by habitat loss and degradation from urban and agricultural development and forecasted sea level rise associated with climate change. Remaining wetlands often must be managed to ensure that waterbird habitat needs, and other ecosystem functions, are met. For many waterbirds, the availability of island...

Hartman, C. Alex; Ackerman, Joshua T.; Herzog, Mark P.
Hartman, CA, JT Ackerman, MP Herzog. 2016. Island Characteristics Within Wetlands Influence Waterbird Nest Success and Abundance. The Journal of Wildlife Management 80(7): 1177-1188. doi: 10.1002/jwmg.21120

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Year Published: 2016

Effects of haying on breeding birds in CRP grasslands

The Conservation Reserve Program (CRP) is a voluntary program that is available to agricultural producers to help protect environmentally sensitive or highly erodible land. Management disturbances of CRP grasslands generally are not allowed unless authorized to provide relief to livestock producers during severe drought or a similar natural...

Igl, Lawrence D.; Johnson, Douglas H.
Igl, L. D. and Johnson, D. H., 2016. Effects of haying on breeding birds in CRP grasslands. The Journal of Wildlife Management, Early View July 12. doi: 10.1002/jwmg.21119

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Year Published: 2016

Fifty-seventh supplement to the American Ornithologists' Union Check-list of North American Birds

This is the 16th supplement since publication of the 7th edition of the Check-list of North American Birds (American Ornithologists' Union [AOU] 1998). It summarizes decisions made between April 15, 2015, and April 15, 2016, by the AOU's Committee on Classification and Nomenclature—North and Middle America. The Committee has continued to...

Chesser, R. Terry; Burns, Kevin J; Cicero, Carla; Dunn, Jon L.; Kratter, Andrew W.; Lovette, Irby J.; Rasmussen, Pamela C.; Remsen, J.V.; Rising, James D.; Stotz, Douglas F.; Winker, Kevin
Chesser, R. T., Burns, K. J., Cicero, C., Dunn, J. L., Kratter, A. W., Lovette, I. J., Rasmussen, P. C., Remsen, J. V. Jr., Rising, J. D., Stotz, D. F., and Winker, K., 2016, Fifty-seventh supplement to the American Ornithologists' Union: Check-list of North American Birds: Auk, v. 133, no. 3, p. 544-560.

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Year Published: 2016

Pacific walrus coastal haulout database, 1852-2016— Background report

Walruses are large benthic predators that rest out of water between foraging bouts. Coastal “haulouts” (places where walruses rest) are formed by adult males in summer and sometimes by females and young when sea ice is absent, and are often used repeatedly across seasons and years. Understanding the geography and historical use of...

Fischbach, Anthony S.; Kochnev, Anatoly A.; Garlich-Miller, Joel L.; Jay, Chadwick V.
Fischbach, A.S., Kochnev, A.A., Garlich-Miller, J.L., and Jay, C.V., 2016, Pacific walrus coastal haulout database, 1852–2016—Background report: U.S. Geological Survey Open-File Report 2016–1108, 27 p., http://dx.doi.org/10.3133/ofr20161108.

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Year Published: 2016

An automated approach to Litchfield and Wilcoxon's evaluation of dose–effect experiments using the R package LW1949

The authors developed a package, LW1949, for use with the statistical software R to automatically carry out the manual steps of Litchfield and Wilcoxon's method of evaluating dose–effect experiments. The LW1949 package consistently finds the best fitting dose–effect relation by minimizing the chi-squared statistic of the observed and...

Adams, Jean V.; Slaght, Karen; Boogaard, Michael A.
Adams, J. V., Slaght, K. S. and Boogaard, M. A. (2016), An automated approach to Litchfield and Wilcoxon's evaluation of dose–effect experiments using the R package LW1949. Environ Toxicol Chem. doi:10.1002/etc.3490

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Year Published: 2016

Benefits of prescribed flows for salmon smolt survival enhancement vary longitudinally in a highly managed river system

The influence of streamflow on survival of emigrating juvenile Pacific salmonids Oncorhynchus spp. (smolts) is a major concern for water managers throughout the northeast Pacific Rim. However, few studies have quantified flow effects on smolt survival, and available information does not indicate a consistent flow–survival...

Courter, Ian; Garrison, Thomas; Kock, Tobias J.; Perry, Russell W.; Child, David; Hubble, Joel
Courter, I.I., T.M. Garrison, T.J. Kock, R.W. Perry, D.B. Child, and J.D. Hubble. Benefits of prescribed flows for salmon smolt survival enhancement vary longitudinally in a highly managed river system. Riv. Research. App. (Early View).

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Year Published: 2016

Dam operations affect route-specific passage and survival of juvenile Chinook salmon at a main-stem diversion dam

Diversion dams can negatively affect emigrating juvenile salmon populations because fish must pass through the impounded river created by the dam, negotiate a passage route at the dam and then emigrate through a riverine reach that has been affected by reduced river discharge. To quantify the effects of a main-stem diversion dam on juvenile...

Perry, Russell W.; Kock, Tobias J.; Couter, Ian I; Garrison, Thomas M; Hubble, Joel D; Child, David B
Perry, R.W., T.J. Kock,, I.I.Courter, T.M Garrison, J.D., Hubble, and D.B. Child. 2016. Dam operations affect route-specific passage and survival of juvenile Chinook salmon at a main-stem diversion dam. River Res. Appl. (Early View)

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Year Published: 2016

Rediscovery of the 220-year-old holotype of the Banded Iguana, Brachylophus fasciatus (Brongniart, 1800) in the Paris Natural History Museum

The Paris Natural History Museum herpetological collection (MNHN-RA) has seven historical specimens of Brachylophus spp. collected late in the 18th and early in the 19th centuries. Brachylophus fasciatus was described in 1800 by Brongniart but its type was subsequently considered as lost and never present in MNHN-RA collections. We found that 220...

Ineich, Ivan; Fisher, Robert N.
Ineich, I, and RN Fisher. 2016. Rediscovery of the 220-year-old holotype of the Banded Iguana, Brachylophus fasciatus (Brongniart, 1800) in the Paris Natural History Museum. Zootaxa 4138 (2): 381-391. doi: http://doi.org/10.11646/zootaxa.4138.2.10

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Year Published: 2016

Missouri River Scaphirhynchus albus (pallid sturgeon) effects analysis—Integrative report 2016

The Missouri River Pallid Sturgeon Effects Analysis was designed to carry out three components of an assessment of how Missouri River management has affected, and will affect, population dynamics of endangered Scaphirhynchus albus (pallid sturgeon): (1) collection of reliable scientific information, (2) critical assessment and synthesis of...

Jacobson, Robert B.; Annis, Mandy L.; Colvin, Michael E.; James, Daniel A.; Welker, Timothy L.; Parsley, Michael J.
Jacobson, R.B., Annis, M.L., Colvin, M.E., James, D.A., Welker, T.L., and Parsley, M.J., 2016, Missouri River Scaphirhynchus albus (pallid sturgeon) effects analysis—Integrative report 2016: U.S. Geological Survey Scientific Investigations Report 2016–5064, 154 p., http://dx.doi.org/10.3133/sir20165064.