Habitat Use and Temporal Dynamics of Blackwater Stream Fishes in and Adjacent to Beaver Ponds

Copeia ◽  
1999 ◽  
Vol 1999 (3) ◽  
pp. 628 ◽  
Author(s):  
Joel W. Snodgrass ◽  
Gary K. Meffe
Keyword(s):  
Habitat Use ◽  
Temporal Dynamics ◽  
Stream Fishes ◽  
Beaver Ponds ◽  
Blackwater Stream

Seasonal Changes in Habitat Use by Juvenile Coho Salmon (Oncorhynchus kisutch) in Oregon Coastal Streams

1992 ◽  
Vol 49 (4) ◽  
pp. 783-789 ◽  
Author(s):  
Thomas E. Nickelson ◽  
Jeffrey D. Rodgers ◽  
Steven L. Johnson ◽  
Mario F. Solazzi
Keyword(s):  
Habitat Use ◽  
Seasonal Changes ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Beaver Pond ◽  
Winter Habitat ◽  
Oregon Coast ◽  
Beaver Ponds ◽  
Salmon Fry ◽  
Coastal Streams

Habitat use by juvenile coho salmon (Oncorhynchus kisutch) during spring, summer, and winter was examined in Oregon coastal streams. Coho salmon fry were most abundant in backwater pools during spring. During summer, juvenile coho salmon were more abundant in pools of all types than they were in glides or riffles. During winter, juvenile coho salmon were most abundant in alcoves and beaver ponds. Because of the apparent strong preference for alcove and beaver pond habitat during winter and the rarity of that habitat in coastal streams, we concluded that if spawning escapement is adequate, the production of wild coho salmon smolts in most coho salmon spawning streams on the Oregon Coast is probably limited by the availability of adequate winter habitat.

The Role of Predation in Age- and Size-Related Habitat Use by Stream Fishes

Ecology ◽  
1987 ◽  
Vol 68 (3) ◽  
pp. 651-659 ◽  
Author(s):  
Isaac J. Schlosser
Keyword(s):  
Habitat Use ◽  
Stream Fishes

scholarly journals Investigating impacts of and susceptibility to rail noise playback across freshwater fishes reveals counterintuitive response profiles

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Ryan J Friebertshauser ◽  
Daniel E Holt ◽  
Carol E Johnston ◽  
Matthew G Smith ◽  
Mary T Mendonça
Keyword(s):  
Water Column ◽  
Time Course ◽  
Temporal Dynamics ◽  
Noise Pollution ◽  
Single Species ◽  
Ventilation Rate ◽  
Anthropogenic Noise ◽  
Stream Fishes ◽  
Target Species ◽  
Hearing Sensitivity

Abstract While the expansion of anthropogenic noise studies in aquatic habitats has produced conservation-based results for a range of taxa, relatively little attention has been paid to the potential impacts on stream fishes. Recent work has shown responses to road noise in single species of stream fish; however, assemblage-wide effects of anthropogenic noise pollution have not yet been investigated. By examining five metrics of disturbance across four ecologically and evolutionarily disparate species of stream fishes, a series of laboratory experiments aimed to describe the effects of and species susceptibility to anthropogenic noise playback. Each species studied represented a unique combination of hearing sensitivity and water column position. Physiological and behavioral metrics were compared across the presence and absence of rail-noise noise playback in four target species. Through repeated subsampling, the temporal dynamics of cortisol secretion in response to noise in two target species were additionally described. Rail-noise playback had no statistically significant effect on blood glucose or water-borne cortisol levels, with the exception of decreased cortisol in noise-exposed largescale stoneroller (Campostoma oligolepis). Time-course cortisol experiments revealed rapid secretion and showed minimal effects of noise at most observation points. The presence of noise produced significant changes in ventilation rate and swimming parameters in a portion of the four species observed representing the most conserved responses. Overall, effects of noise were observed in species contrary to what would be hypothesized based on theoretical hearing sensitivity and water column position demonstrating that predicting susceptibility to this type of stressor cannot be accomplished based off these course considerations alone. More importantly, we show that anthropogenic noise can disrupt a variety of behavioral and physiological processes in certain taxa and should be further investigated via measures of fitness in the wild.

scholarly journals Ecoregional and temporal dynamics of dugong habitat use in a complex coral reef lagoon ecosystem

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Solène Derville ◽  
Christophe Cleguer ◽  
Claire Garrigue
Keyword(s):  
Coral Reef ◽  
Habitat Use ◽  
Marine Mammals ◽  
Temporal Dynamics ◽  
New Caledonia ◽  
High Tide ◽  
Marine Species ◽  
Spatial Density ◽  
Shallow Waters ◽  
Aerial Surveys

AbstractMobile marine species display complex and nonstationary habitat use patterns that require understanding to design effective management measures. In this study, the spatio-temporal habitat use dynamics of the vulnerable dugong (Dugong dugon) were modelled from 16 satellite-tagged individuals in the coral reef lagoonal ecosystems of New Caledonia, South Pacific. Dugong residence time was calculated along the interpolated tracks (9371 hourly positions) to estimate intensity of use in three contrasting ecoregions, previously identified through hierarchical clustering of lagoon topographic characteristics. Across ecoregions, differences were identified in dugong spatial intensity of use of shallow waters, deeper lagoon waters and the fore-reef shelf outside the barrier reef. Maps of dugong intensity of use were predicted from these ecological relationships and validated with spatial density estimates derived from aerial surveys conducted for population assessment. While high correlation was found between the two datasets, our study extended the spatial patterns of dugong distribution obtained from aerial surveys across the diel cycle, especially in shallow waters preferentially used by dugongs at night/dusk during high tide. This study has important implications for dugong conservation and illustrates the potential benefits of satellite tracking and dynamic habitat use modelling to inform spatial management of elusive and mobile marine mammals.

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