Niche overlap between young brown trout (Salmo trutta) and Siberian sculpin (Cottus poecilopus) in a subalpine Norwegian river

Hesthagen, Trygve; Saksgård, Randi; Hegge, Ola; Dervo, Børre Kind; Skurdal, Jostein

doi:10.1023/b:hydr.0000026354.22430.17

Cited by 33 publications

(34 citation statements)

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“…than stone loach. Unlike many studies that have considered bullhead to be a strong temporary or permanent food competitor of brown trout, (Andreasson, 1971;Hestagen and Heggenes, 2002;Hesthagen et al, 2004;Holmen et al, 2003), no such relationship was found in our data. The position of dace among these species is governed by its close relationship to benthos and drifted plants and detritus.…”

Section: Discussioncontrasting

confidence: 99%

“…Piscivory was even identified in bullhead, with a juvenile brown trout appearing as food in one case. Sporadic piscivory in bullhead has also been mentioned by Andreasson (1971) and Hesthagen et al (2004). Maitland and Campbell (1992) even found piscivory (juvenile individuals) in 3% of the bullhead they examined.…”

Section: Discussionmentioning

confidence: 53%

“…Horton (1961) found a 12% incidence of piscivory in the Walla stream, and Yevsin and Ivanov (1979) 7% piscivory in the river Pulonga; however, the average lengths of these samples were 600 and 400 mm, respectively. Hesthagen et al (2004) reported only one occurrence of piscivory in a sample of 207 brown trout from 70-120 mm in length. In the former Czechoslovakia, Dyk (1956) found a piscivory incidence of 12% in 641 brown trout, representing the 7th most important food source.…”

Section: Discussionmentioning

confidence: 99%

“…Cavalli et al (1998), Jansen et al (2002), and Saksgard and Hesthagen (2004) have described the character displacement of brown trout and the brook char Salvelinus fontinalis in lakes, where brown trout concentrated on littoral and epibenthic habitats and brook char on epipelagic habitats. Hestagen and Heggenes (2002) and Hesthagen et al (2004) also described the preference of bullhead for deeper substrata compared with brown trout. The opposite preference is generally thought to be more common, as in our location, where bullhead preferred coarse stone substrata and shallower depths.…”

Section: Discussionmentioning

confidence: 99%

“…In this work, the food of five fish species (brown trout Salmo trutta, chub Squalius cephalus, dace Leuciscus leuciscus, stone loach Barbatula barbatula and common bullhead Cottus gobio) was studied. All these fish species are common in the stream studied, and many authors have studied diet and/or competition in these species (Albertová, 1982;Cavalli et al, 1998;Dyk, 1932Dyk, , 1956Fochetti et al, 2008;Hesthagen et al, 2004;Horton, 1961;Hughes et al, 2003;L'abée-Lund et al, 2002;Legalle et al, 2005;Maitland, 1965;Markovič et al, 2007;Saksgard and Hesthagen, 2004;Yevsin and Ivanov, 1979). The aim of this work was to examine the diet of these five fish species and to evaluate the level of competition as the overlap in their food niches.…”

Section: Introductionmentioning

confidence: 99%

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The food niche overlap of five fish species in the Úpoř brook (Central Bohemia)

Vlach

Švátora

Dušek

2013

Knowl. Managt. Aquatic Ecosyst.

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The diet and food niche overlap of five fish species in the Úpoř brook was evaluated. The supply of food represented by benthos was studied, and the proportion of total food particles in the intestine of brown trout Salmo trutta L., chub Squalius cephalus (L.), dace Leuciscus leuciscus (L.), bullhead Cottus gobio (L.) and stone loach Barbatula barbatula (L.) was measured. Evaluations were performed using a new index (Mtot p ). All fish species except stone loach exhibited a balanced consumption of the food supply. The food components were systematically grouped, but no differences in the ingestion of these groups were found. However, a new approach in the evaluation of food competition based on observation of species-specific preferences/avoidance in ingestion of food particles was applied. The particles were divided into four ecological categories according to their availability for fish. Brown trout concentrated on easily accessible sources of benthos or that hiding below stones, and also distinctly preyed on terrestrial insects. Chub displayed a similar feeding habit, though concentrating more on drift and allochthonous sources. The food spectrum of dace was mostly composed of easily accessible benthic organisms, consuming fewer hidden benthos and terrestrial insects. The food of bullhead and stone loach was similar, both preferring benthos. Bullhead consumed hidden species while stone loach consumed more accessible species rather than hidden ones. l'exception de la loche franche présentaient une consommation équilibrée de la nourriture disponible. Les composants alimentaires ont été regroupés suivant les ordres ou classes, mais aucune différence dans l'ingestion de ces groupes n'a été trouvée. Cependant, une nouvelle approche dans l'évaluation de la compétition alimentaire basée sur l'observation des préférences / évitement à l'ingestion de particules alimentaires spécifiques à chaque espèce a été appliquée. Les particules ont été réparties en quatre catégories écologiques en fonction de leur disponibilité pour les poissons. La truite se tourne vers des sources facilement accessibles du benthos ou cachées en dessous des pierres, et significativement vers les insectes terrestres. Le chevesne affiche des habitudes alimentaires similaires, bien que se concentrant plus sur la dérive et les sources allochtones. Le spectre alimentaire des vandoises était principalement composé d'organismes benthiques facilement accessibles, consommant moins de benthos cachés et d'insectes terrestres. La nourriture du chabot et de la loche franche étaient similaires, les deux préfèrent le benthos. Le chabot consomme des espèces cachées alors que la loche franche consomme des espèces accessibles, plutôt que celles qui sont cachées. RÉSUMÉ

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The food niche overlap of five fish species in the Úpoř brook (Central Bohemia)

Vlach

Švátora

Dušek

2013

Knowl. Managt. Aquatic Ecosyst.

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Prey diversity as a driver of resource partitioning between river‐dwelling fish species

Sánchez‐Hernández

Gabler

Amundsen

2017

Ecology and Evolution

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Although food resource partitioning among sympatric species has often been explored in riverine systems, the potential influence of prey diversity on resource partitioning is little known. Using empirical data, we modeled food resource partitioning (assessed as dietary overlap) of coexisting juvenile Atlantic salmon (Salmo salar) and alpine bullhead (Cottus poecilopus). Explanatory variables incorporated into the model were fish abundance, benthic prey diversity and abundance, and several dietary metrics to give a total of seventeen potential explanatory variables. First, a forward stepwise procedure based on the Akaike information criterion was used to select explanatory variables with significant effects on food resource partitioning. Then, linear mixed‐effect models were constructed using the selected explanatory variables and with sampling site as a random factor. Food resource partitioning between salmon and bullhead increased significantly with increasing prey diversity, and the variation in food resource partitioning was best described by the model that included prey diversity as the only explanatory variable. This study provides empirical support for the notion that prey diversity is a key driver of resource partitioning among competing species.

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Seasonal variations in food resource partitioning among four sympatric gudgeon species in the upper Yangtze River

Liu

Wang

Liu

2019

Ecology and Evolution

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Knowledge of food resource partitioning among sympatric fish species is crucial for understanding the potential mechanisms of species coexistence. Gudgeons (Teleostei: Cyprinidae: Gobioninae) often dominate fish assemblages in the upper Yangtze River. However, little research has been conducted on their trophic interactions. In this paper, seasonal diet and feeding strategy variations of four sympatric gudgeon species, Coreius guichenoti, Coreius heterodon, Rhinogobio ventralis, and Rhinogobio cylindricus, were investigated by analysis of intestinal tract contents, aiming to explore whether food resource partitioning occurred among them. Fish specimens were collected during spring (April–May) and autumn (August–October) in 2010 in Hejiang, a free‐flowing stretch of the upper Yangtze River. Coreius guichenoti, C. heterodon, and R. cylindricus showed omnivorous feeding habits, while R. ventralis exhibited an obligate carnivore feeding habit. Diet overlap among the four studied species was high, especially in spring. However, changes in feeding strategies were observed in autumn. Specifically, C. guichenoti and R. cylindricus expanded their dietary niche breadth and consumed detritus, Sinopotamidae or Hydropsychidae as important complementary food resources. In contrast, C. heterodon and R. ventralis reduced their dietary niche breadth and became more specialized on mussels (Limnoperna lacustris). These results confirmed that sympatric fish species can coexist with high diet overlap, and food resource partitioning among these species may also fluctuate with the seasons.

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Niche overlap between young brown trout (Salmo trutta) and Siberian sculpin (Cottus poecilopus) in a subalpine Norwegian river

Cited by 33 publications

References 0 publications

The food niche overlap of five fish species in the Úpoř brook (Central Bohemia)

The food niche overlap of five fish species in the Úpoř brook (Central Bohemia)

Prey diversity as a driver of resource partitioning between river‐dwelling fish species

Seasonal variations in food resource partitioning among four sympatric gudgeon species in the upper Yangtze River

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