Nest Association of Dusky Shiners (Notropis cummingsae) and Redbreast Sunfish (Lepomis auritus), a Potentially Parasitic Relationship

Copeia ◽  
1993 ◽  
Vol 1993 (1) ◽  
pp. 159 ◽  
Author(s):  
Dean E. Fletcher
Keyword(s):  
Nest Association ◽  
Redbreast Sunfish

Sexual differences in accumulation of mercury in four species of centrarchid fishes

1988 ◽  
Vol 66 (4) ◽  
pp. 944-949 ◽  
Author(s):  
Paul F. Nicoletto ◽  
Albert C. Hendricks
Keyword(s):  
Lepomis Macrochirus ◽  
Mercury Content ◽  
Lepomis Gibbosus ◽  
South Fork ◽  
The South ◽  
Male And Female ◽  
Rock Bass ◽  
Males And Females ◽  
Redbreast Sunfish ◽  
Ambloplites Rupestris

A 3-year study of fish from the South River, and the South Fork of the Shenandoah River, and the Shenandoah River in Virginia revealed significant differences in the muscle mercury content of males and females. Female rock bass, Ambloplites rupestris, redbreast sunfish, Lepomis auritus, pumpkinseed, Lepomis gibbosus, and bluegill, Lepomis macrochirus contained higher levels of mercury than the males of each species. An analysis of these species indicated that sex-related differences in mercury levels were not due to differences in body size but may have been related to the onset of reproduction. For example, mercury levels in 1-year-old male and female redbreast sunfish were not significantly different: females averaged 0.66 μg Hg/g and males averaged 0.63 μg Hg/g. However, at 2 years of age, when redbreast sunfish first reproduce, females contained significantly more mercury than males: females averaged 0.84 μg Hg/g and males averaged 0.60 μg Hg/g. Analysis of the other species yielded similar results.

Ecology and Status of the Redbreast Sunfish,Lepomis auritus, in Yoho Lake, New Brunswick

2012 ◽  
Vol 19 (4) ◽  
pp. 653-664
Author(s):  
Mark D. Gautreau ◽  
R. Allen Curry
Keyword(s):  
New Brunswick ◽  
Redbreast Sunfish

scholarly journals Nest association between two predators as a behavioral response to the low density of rodents

The Auk ◽  
2019 ◽  
Vol 137 (1) ◽  
Author(s):  
Ivan Pokrovsky ◽  
Dorothée Ehrich ◽  
Ivan Fufachev ◽  
Rolf A Ims ◽  
Olga Kulikova ◽  
...  
Keyword(s):  
Behavior Pattern ◽  
Bird Species ◽  
Population Cycles ◽  
The Arctic ◽  
Small Rodent ◽  
Nest Association ◽  
Peregrine Falcons ◽  
Close Proximity ◽  
Nesting Association ◽  
Rodent Prey

Abstract Many birds nest in association with aggressive birds of other species to benefit from their protection against predators. We hypothesized that the protective effect also could extend to foraging resources, whereby the resultant resource-enriched habitats near a nest of aggressive raptors could be an alternative cause of associations between nesting bird species with non-overlapping foraging niches. In the Arctic, the Rough-legged Hawk (Buteo lagopus) and the Peregrine Falcon (Falco peregrinus) are 2 raptor species with non-overlapping food resources that have been reported to nest sometimes in close proximity. Since nesting Peregrine Falcons are very aggressive, they may protect the small rodent prey near their nests from predation, and Rough-legged Hawks could use these hot spots as a nesting territory. In 2 regions in low Arctic Russia we found that (1) the nesting territories of Peregrine Falcons were indeed enriched with small rodents as compared to control areas, (2) the probability of nest association between the 2 raptors increased when rodent abundance was generally low in the region where hawks did not use alternative prey, and (3) hawk reproductive success increased when nesting close to Peregrine Falcons. These results suggest that implications of aggressive nest site defense in birds in certain cases may involve more mechanisms than previously explored. A key ecological process in tundra, rodent population cycles, may explain the occurrence and adaptive significance of a specific behavior pattern, the nesting association between 2 raptor species.

Feeding, growth, and trophic position of redbreast sunfish (Lepomis auritus) in watersheds of differing land cover in the lower Piedmont, USA

2017 ◽  
Vol 21 (1) ◽  
pp. 107-117 ◽  
Author(s):  
Brian S. Helms ◽  
Nate A. Bickford ◽  
Nathan W. Tubbs ◽  
Jack W. Feminella
Keyword(s):  
Land Cover ◽  
Trophic Position ◽  
Redbreast Sunfish
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