The foraging behavior of the central mudminnow and yellow perch: the influence of foraging site, intraspecific and interspecific competition

Oecologia ◽  
1985 ◽  
Vol 66 (2) ◽  
pp. 271-279 ◽  
Author(s):  
Cynthia A. Paszkowski
Keyword(s):  
Interspecific Competition ◽  
Foraging Behavior ◽  
Yellow Perch ◽  
Foraging Site

Fish Size and Prey Availability Affect Growth, Survival, Prey Selection, and Foraging Behavior of Larval Yellow Perch

2004 ◽  
Vol 133 (3) ◽  
pp. 504-514 ◽  
Author(s):  
Brian D. S. Graeb ◽  
John M. Dettmers ◽  
David H. Wahl ◽  
Carla E. Cáceres
Keyword(s):  
Foraging Behavior ◽  
Yellow Perch ◽  
Prey Availability ◽  
Prey Selection ◽  
Fish Size

Evidence for Foraging-Site Fidelity and Individual Foraging Behavior of Pelagic Cormorants Rearing Chicks in the Gulf of Alaska

The Condor ◽  
2011 ◽  
Vol 113 (1) ◽  
pp. 80-88 ◽  
Author(s):  
Jana Kotzerka ◽  
Scott A. Hatch ◽  
Stefan Garthe
Keyword(s):  
Foraging Behavior ◽  
Site Fidelity ◽  
Gulf Of Alaska ◽  
Foraging Site

Interspecific Competition and the Foraging Behavior of Plain-Brown Woodcreepers

Ecology ◽  
1966 ◽  
Vol 47 (4) ◽  
pp. 667-672 ◽  
Author(s):  
Edwin O. Willis
Keyword(s):  
Interspecific Competition ◽  
Foraging Behavior

scholarly journals Pollinator traits and competitive context shape dynamic foraging behavior in bee communities

2017 ◽  
Author(s):  
Heather M. Briggs ◽  
Berry J. Brosi
Keyword(s):  
Interspecific Competition ◽  
Foraging Behavior ◽  
Resource Use ◽  
Behavioral Plasticity ◽  
Interspecific Interactions ◽  
Reproductive Function ◽  
Site Variation ◽  
Predictive Understanding ◽  
Tongue Length ◽  
Context Shape

AbstractInterspecific interactions (e.g. competition) can dynamically shape individual and species-level resource use within communities. Understanding how interspecific competition between pollinators species shapes resource use is of particular interest because pollinator foraging behavior (“floral fidelity”) is directly linked to plant reproductive function through the movement of conspecific pollen. Through targeted species removals, this study aims to gain a predictive understanding of how interspecific competition can influence pollinator foraging behavior. We explore how traits—specifically pollinator tongue length, known to dictate pollinator resource partitioning—influence behavioral plasticity and drive dynamic interspecific interactions. Our results demonstrate that bee species vary in their floral fidelity and that tongue length explains a large part of this variation. Bees with shorter tongues move between plant species (floral infidelity) more often than bees with longer tongues. We did not find significant variation in the response of bee species to a reduction in interspecific competition, but rather saw a guild-wide reduction in floral fidelity in response to the removal of the dominant bee species Finally, our results suggest that tongue length of the most abundant bee species, a site-level attribute, explains much of the site-to-site variation in pollinator foraging behavior. In particular, we found that as the tongue length of the most abundant bee in the site increases, the site level foraging fidelity decreases. With global pollinator populations on the decline, novel interactions between plants and pollinators are likely to occur. Exploring how the competitive landscape shapes foraging plasticity will help us generalize to other plant pollinator systems and begin to better predict the functional implications of competitive interactions.

Effect of Competition Between Two Freshwater Fishes on Prey Consumption and Abundance

1986 ◽  
Vol 43 (7) ◽  
pp. 1363-1372 ◽  
Author(s):  
John Mark Hanson ◽  
William C. Leggett
Keyword(s):  
Interspecific Competition ◽  
Intraspecific Competition ◽  
Littoral Zone ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Lepomis Gibbosus ◽  
Fish Biomass ◽  
Gut Fullness ◽  
Total Fish ◽  
Food Consumed

The effect of inter- and intraspecific competition on the type and quantity of food consumed by fish, and on the abundance of macroinvertebrate prey, was examined by manipulating densities of yellow perch (Perca flavescens) and pumpkinseed (Lepomis gibbosus) stocked into littoral zone enclosures at levels approximating 0.5, 1.0, and 2.0 times the measured total fish biomass on the littoral zone. In intraspecific competition experiments, neither species showed a change in the type of prey eaten (principally macroinvertebrates). The amount of food eaten by yellow perch reared at high (26 g/m2) densities was significantly depressed relative to that of perch reared at low (6.5 g/m2) and natural (13 g/m2) densities. There were no significant differences in the amount of food eaten by pumpkinseed at the three fish densities. The gut fullness of pumpkinseed reared at high densities, however, was biased to a significant but unknown degree by the inclusion of a nonfood item, macrophyte fragments, in the estimates. No other fish consumed macrophytes. In interspecific competition experiments, the gut fullness of yellow perch and pumpkinseed reared together (combined density 13 g/m2) did not differ from that of fish reared alone at low or natural densities. The diet (principally macroinvertebrates) of the superior competitor, pumpkinseed, did not change relative to that of pumpkinseed reared alone. The inferior competitor, yellow perch, exhibited a significant change in diet. Microcrustaceans (an energetically inferior food) comprised 30–53% of the diet (by weight) of yellow perch reared with pumpkinseed compared with < 1% of the diet of perch reared alone. Total macroinvertebrate biomass and abundance were unaffected by differences in fish biomass in the enclosures.

Sign in / Sign up

Export Citation Format

Share Document