A Field Test for Competitive Interactions among Foraging Stream Fishes

Freeman, Mary C.; Grossman, Gary D.

doi:10.2307/1446170

Cited by 16 publications

(20 citation statements)

References 14 publications

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“…Dominant fish had higher movement rates and higher capture success than subordinates regardless of species (Hazelton & Grossman 2009). We are assuming that mealworms adequately represented natural prey, but both species are opportunistic feeders (Etnier & Starnes 1993) and it is likely that similar patterns are manifested in with natural prey (Freeman & Grossman 1992b). When both turbidity and velocity increased, both species captured fewer prey by via forward movement, and captured greater numbers of prey via lateral or downstream captures.…”

Section: Discussionmentioning

confidence: 99%

Turbidity, velocity and interspecific interactions affect foraging behaviour of rosyside dace (Clinostomus funduloides) and yellowfin shiners (Notropis lutippinis)

Hazelton

Grossman

2009

Ecology of Freshwater Fish

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– Fish diversity is strongly affected by habitat degradation (e.g., increased turbidity) and invasive species. We examined the effects of turbidity, velocity, length, dominance and intra‐ and interspecific competition on focal point depth, movement rate, dominance and aggression rate in native rosyside dace (Clinostomus funduloides) and invasive yellowfin shiners (Notropis lutipinnis) in a southern Appalachian stream (NC, USA). We compared results for intra‐ and interspecific groups of fishes at two densities (two and four fishes), three turbidity levels (10, 20 and 30 nephelometric turbidity units), and two velocities (12, 18 cm·s−1). Dominance was significantly correlated with length in intraspecific groups of both species, and dominant fish held more profitable foraging positions about 75% of the time. Yellowfin shiners were dominant more often than rosyside dace in interspecific trials. Akaike’s Information Criterion indicated that models containing turbidity, velocity, species and intraspecific competition, explained the greatest amount of information in focal point depth data. By contrast, movement and aggression rates were best explained by models based on dominance and velocity. Finally, aggression rate was best explained by models containing fish length and turbidity. These results indicate that habitat degradation, intra‐ and interspecific interactions influence the foraging behaviour and future success of these species in the Little Tennessee River drainage.

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Section: Discussionmentioning

confidence: 99%

Turbidity, velocity and interspecific interactions affect foraging behaviour of rosyside dace (Clinostomus funduloides) and yellowfin shiners (Notropis lutippinis)

Hazelton

Grossman

2009

Ecology of Freshwater Fish

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“…The rosyside date, Clinostomus fiaduloides, is not subject to strong predation pressure (Grossman & Freeman 1987) or frequent interactive competition (Freeman & Grossman 1992a) in our headwater stream study sites. Date feed on drifting invertebrates and may forage solitarily or in groups.…”

Section: Introductionmentioning

confidence: 92%

Effects of habitat availability on dispersion of a stream cyprinid

Freeman

Grossman

1993

Environ Biol Fish

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“…Moreover, the ability to forage at different depths in the water column may enable food to be partitioned among sympatric species (e.g. Freeman & Grossman, 1992;Dineen et al, 2007;Sánchez-Hernández et al, 2013).…”

Section: Introductionmentioning

confidence: 99%