Resource Partitioning and Niche Shift in Arctic Charr Salvelinus alpinus and Brown Trout Salmo trutta

Langeland, Arnfinn; L’Abée-Lund, Jan Henning; Jönsson, Bror; Jönsson, Nina

doi:10.2307/5420

Cited by 152 publications

(212 citation statements)

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“…However, the present temperature regime in Lake Skasen may not be favourable for Arctic charr, as surface waters were above 16°C for several weeks in the summer of 2010. Even though Arctic charr commonly utilize both the littoral zone and the upper part of the pelagic zone when living in allopatry, or in sympatry with low densities of other species, (Langeland et al 1991;Langeland & L'Abée-Lund 1996;Klemetsen et al 2002), it has also been shown that high water temperatures may moderate this habitat use. The species seems to avoid habitats with temperatures above 16°C, and prefer to reside in cooler, deeper waters (Langeland & L'Abee-Lund 1998).…”

Section: Discussionmentioning

confidence: 99%

Arctic charr (Salvelinus alpinus) squeezed in a complex fish community dominated by perch (Perca fluviatilis)

Sandlund

Haugerud²,

Rognerud³

et al. 2013

Fauna Norv.

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Sandlund OT, Haugerud E, Rognerud S and Borgstrøm R. 2013. Arctic charr (Salvelinus alpinus) squeezed in a complex fish community dominated by perch (Perca fluviatilis). Fauna norvegica 33: 1-11.In the complex fish community of Lake Skasen, southeastern Norway, the relative population density, habitat use and diet of Arctic charr, perch, roach and burbot was studied by a gill net survey during June-September 2010. A marked segregation in habitat use was observed, with Arctic charr and burbot captured in the profundal and deepest part of the pelagic habitat, and perch and roach captured in the littoral and upper part of the pelagic. Perch dominated the total catches, followed by roach. Arctic charr occurred in low numbers in the catches, and also had a low annual growth rate. Even in June, at low water temperatures, Arctic charr were confined to the profundal. Both Arctic charr, roach and perch fed on the same cladocerans, but all size groups of perch had fish as an important part of the diet. Analysis of stable carbon and nitrogen isotopes revealed a narrow trophic niche of Arctic charr, positioned at the extreme pelagic end of the carbon gradient relative to the other fish species. These had a wider span of δ 13 C signatures, but more positioned towards the littoral end of the carbon gradient. The low growth rate of Arctic charr, despite a low population density, indicates that food is a limiting resource for charr in this lake, probably due to a confinement to the profundal habitat as a result of competition and predator avoidance. Since all age-classes of Arctic charr seem to be enclosed in the profundal habitat, intraspecific competition and predation may be supplementary stressors resulting in low annual recruitment and low population density, as well as low individual growth rate, i.e. the population is squeezed. The narrow trophic niche of Arctic charr compared to perch, roach and burbot, revealed by stable isostope analysis, supports this conclusion.

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Section: Discussionmentioning

confidence: 99%

Arctic charr (Salvelinus alpinus) squeezed in a complex fish community dominated by perch (Perca fluviatilis)

Sandlund

Haugerud²,

Rognerud³

et al. 2013

Fauna Norv.

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“…pike. Of these species white-and charr in winter (Nilsson, 1963;Langeland et al, fish is clearly dominant over Arctic charr due to similar 1991). Burbot is an effective predator on charr which habitat and niche requirements (Svärdson, 1976).…”

Section: Resultsmentioning

confidence: 99%

Does global warming threat the existence of Arctic charr,Salvelinus alpinus(Salmonidae), in northern Finland?

Lehtonen

1998

Italian Journal of Zoology

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“…Although reduction of competition through resource partitioning between sympatric populations has been documented (e.g. Langeland et al 1991), far less is known about the potential influence of competition on competitive exclusion and the formation of allopatric populations of closely related species that occupy similar niches.…”

Section: Introductionmentioning

confidence: 99%

Distribution and diet of four species of carcharhinid shark in the Hawaiian Islands: evidence for resource partitioning and competitive exclusion

Papastamatiou¹,

Wetherbee²,

Lowe³

et al. 2006

Mar. Ecol. Prog. Ser.

182

136

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Competition and predation are both important in structuring the distribution of marine organisms; however, little is known about how competition and predation influence the distribution of elasmobranch fishes. We used data collected from shark control programs conducted between 1967 and 1980, throughout the Hawaiian island chain, to examine the distribution and dietary overlap of the 4 most abundant carcharhinid sharks. Tiger sharks Galeorcerdo cuvier and Galapagos sharks Carcharhinus galapagensis were caught at all islands, but were more abundant in the northwestern Hawaiian Islands (NWHI) than in the main Hawaiian Islands (MHI). Gray reef sharks Carcharhinus amblyrhynchos and sandbar sharks Carcharhinus plumbeus showed an inverse relationship in distribution, with sandbar sharks abundant in the MHI, but virtually absent throughout the NWHI, and gray reef sharks only sporadically found throughout the MHI, but abundant in the NWHI. Dietary overlap was high between gray reef and sandbar sharks, and between sandbar and Galapagos sharks. Tiger sharks had low dietary overlap with all other species, except for large Galapagos sharks. The data analyzed in our study support the hypothesis that interspecific competition influences the distribution of carcharhinid sharks throughout the Hawaiian Archipelago.

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Resource Partitioning and Niche Shift in Arctic Charr Salvelinus alpinus and Brown Trout Salmo trutta

Cited by 152 publications

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Arctic charr (Salvelinus alpinus) squeezed in a complex fish community dominated by perch (Perca fluviatilis)

Arctic charr (Salvelinus alpinus) squeezed in a complex fish community dominated by perch (Perca fluviatilis)

Does global warming threat the existence of Arctic charr,Salvelinus alpinus(Salmonidae), in northern Finland?

Distribution and diet of four species of carcharhinid shark in the Hawaiian Islands: evidence for resource partitioning and competitive exclusion

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