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Donald E. Lyons
Oregon State University
37Publications
14H-index
567Citations
Publications 38
Newest
#1James B Pearson (FWS: United States Fish and Wildlife Service)
#2Jason B. Dunham (USGS: United States Geological Survey)H-Index: 40
Last.Donald E. Lyons (OSU: Oregon State University)H-Index: 14
view all 4 authors...
The introduction of Common Carp (Cyprinus carpio) into North American waterways has led to widespread alteration of aquatic ecosystems. Control of this invader has proven extremely difficult due to its capacity for rapid population growth. To help understand how Common Carp can potentially be controlled we developed a population dynamics model (CarpMOD) to explore the efficacy of active and passive control measures that impose mortality on multiple life stages (embryos, juveniles and adults). We...
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#1Stephanie A. Loredo (OSU: Oregon State University)
#2Rachael A. Orben (OSU: Oregon State University)H-Index: 10
Last.Shawn W. Stephensen (FWS: United States Fish and Wildlife Service)
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Abstract Successful foraging of marine predators depends on environmental conditions, which also influence prey availability. Neutral or negative El Nino Southern Oscillation and Pacific Decadal Oscillation ocean conditions during the summer of 2013 and strongly positive conditions during the summer of 2015 in the northern California Current System provided a case study to evaluate a marine predator's response to anomalously warm conditions. We used satellite transmitters with saltwater switches...
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#1Donald E. Lyons (OSU: Oregon State University)H-Index: 14
#2Allison G. L. Patterson (OSU: Oregon State University)H-Index: 2
Last.Daniel D. Roby (USGS: United States Geological Survey)H-Index: 30
view all 5 authors...
For migratory waterbirds, the availability and quality of suitable stopover habitat can affect body condition and demographic parameters throughout the annual cycle. This study investigates the importance of the Salton Sea, a large saline lake located in the southwestern United States near the USA-Mexico border, for migrating Caspian Terns (Hydroprogne caspia) fitted with long-duration satellite telemetry tags in the northwest contiguous USA. During fall migration, 100% (n = 25) in 2014 and 98% ...
1 CitationsSource
3 CitationsSource
#1Stefanie Collar (OSU: Oregon State University)H-Index: 1
#2Daniel D. Roby (OSU: Oregon State University)H-Index: 30
Last.Donald E. Lyons (OSU: Oregon State University)H-Index: 14
view all 3 authors...
Our study investigated the influence of bottom-up and top-down drivers on the declining fledging success at a once thriving breeding colony of Caspian terns (Hydroprogne caspia). Situated at the mouth of the Columbia River, OR, East Sand Island (ESI) is home to the largest Caspian tern breeding colony in North America. Since 2001, the decline in fledging success of Caspian terns at ESI has been associated with a significant increase in average river discharge during May and June. During the year...
2 CitationsSource
Last.Daniel D. RobyH-Index: 30
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#1Karen N. Courtot (OSU: Oregon State University)H-Index: 2
#2Daniel D. Roby (USGS: United States Geological Survey)H-Index: 30
Last.Jessica Y. Adkins (OSU: Oregon State University)H-Index: 5
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Abstract. Capturing breeding adults of colonially nesting species can entail risks of nest failure and even colony abandonment, especially in species that react strongly to human disturbance. A low-disturbance technique for capturing specific adult Double-crested Cormorants (Phalacrocorax auritus) at a ground-nesting colony was developed to reduce these risks and is described here. Nesting habitat enhancement was used to attract Doublecrested Cormorants to nest adjacent to above-ground tunnels c...
1 CitationsSource
#1Yasuko SuzukiH-Index: 1
#2Daniel D. Roby (USGS: United States Geological Survey)H-Index: 30
Last.Ken CollisH-Index: 16
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Double-crested cormorants (Phalacrocorax auritus) have been identified as the source of significant mortality to juvenile salmonids (Oncorhynchus spp.) in the Columbia River Basin. Management plans for reducing the size of a large colony on East Sand Island (OR, USA) in the Columbia River estuary are currently being developed. We evaluated habitat enhancement and social attraction as nondestructive techniques for managing cormorant nesting colonies during 2004–2007. We tested these techniques on...
2 CitationsSource
AbstractAccurate assessment of specific mortality factors is vital to prioritize recovery actions for threatened and endangered species. For decades, tag recovery methods have been used to estimate fish mortality due to avian predation. Predation probabilities derived from fish tag recoveries on piscivorous waterbird colonies typically reflect minimum estimates of predation due to an unknown and unaccounted-for fraction of tags that are consumed but not deposited on-colony (i.e., deposition prob...
14 CitationsSource
#1Allison G. L. Patterson (OSU: Oregon State University)H-Index: 2
#2Alexander S. Kitaysky (UAF: University of Alaska Fairbanks)H-Index: 33
Last.Daniel D. Roby (USGS: United States Geological Survey)H-Index: 30
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Stressful environmental conditions affect the adrenocortical function of developing animals, which can have consequences for their fitness. Discovery of the avian stress hormone corticosterone (CORT) in feathers has the potential to broaden the application of endocrine research in ecological and evolutionary studies of wild birds by providing a long-term measure of CORT secretion. Mechanisms of CORT deposition in feathers are not well known and few studies have related feather CORT to circulatin...
22 CitationsSource
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