Influence of Food Abundance, Nest-Site Habitat, and Forest Fragmentation on Breeding Ovenbirds

The Auk ◽  
1998 ◽  
Vol 115 (1) ◽  
pp. 96-104 ◽  
Author(s):  
Dawn M. Burke ◽  
Erica Nol
Keyword(s):  
Forest Fragmentation ◽  
Nest Site ◽  
Food Abundance ◽  
Influence Of Food

Influence of food abundance on competitive aggression in juvenile convict cichlids

2002 ◽  
Vol 63 (2) ◽  
pp. 323-330 ◽  
Author(s):  
James W.A. Grant ◽  
Isabelle L. Girard ◽  
Cindy Breau ◽  
Laura K. Weir
Keyword(s):  
Food Abundance ◽  
Convict Cichlids ◽  
Influence Of Food

Food and foraging behavior in relation to microhabitat use and survival of age-0 Atlantic salmon

1998 ◽  
Vol 55 (1) ◽  
pp. 116-127 ◽  
Author(s):  
Keith H Nislow ◽  
Carol Folt ◽  
Marco Seandel
Keyword(s):  
Atlantic Salmon ◽  
Foraging Behavior ◽  
High Velocity ◽  
Field Experiments ◽  
Growth Period ◽  
Food Abundance ◽  
Invertebrate Drift ◽  
Microhabitat Use ◽  
Growth And Survival ◽  
Influence Of Food

We examined, using underwater snorkeling observations and field experiments, the influence of food availability on foraging behavior, habitat use, and survival of age-0 Atlantic salmon (Salmo salar) during the critical first-summer growth period. While most feeding attempts were directed at drifting invertebrate prey, we found a higher rate of benthic feeding forays than previously reported for salmon. Greater food abundance was associated with higher feeding foray rates, more time allocated to foraging, occupancy of higher microhabitat velocities, and greater first-year survival between two study streams. Experimental drift reduction reduced drift foray rates and triggered a change in behavior to increased benthic feeding. In contrast, within a single stream, greater predicted invertebrate drift in high-velocity microhabitats (1 m2) was unrelated to either microhabitat occupancy or drift foray rates of age-0 salmon. We suggest that, in some situations, salmonid foraging is related more directly to overall prey density than to the availability of high-velocity, high drift rate microhabitats. Differences in resource tracking (increased foraging, growth, or survival with increased food abundance) at different scales, along with the use of alternative predation modes, underscore the importance of considering behavior when linking food resources to growth and survival of stream salmonids.

Linking land-use projections and forest fragmentation analysis.

2007 ◽  
Author(s):  
Andrew J. Plantinga ◽  
Ralph J. Alig ◽  
Henry Eichman ◽  
David J. Lewis
Keyword(s):  
Land Use ◽  
Forest Fragmentation
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