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Ontogeny and dietary specialization in brown trout (Salmo trutta L.) from Loch Ness, Scotland, examined using stable isotopes of carbon and nitrogen

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Ontogeny and dietary specialization in brown trout (Salmo trutta L.) from Loch Ness, Scotland, examined using stable isotopes of carbon and nitrogen. / Grey, Jonathan.

In: Ecology of Freshwater Fish, Vol. 10, No. 3, 09.2001, p. 168-176.

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@article{ea518c3ef34b4606a5b7332c0793d13a,
title = "Ontogeny and dietary specialization in brown trout (Salmo trutta L.) from Loch Ness, Scotland, examined using stable isotopes of carbon and nitrogen",
abstract = "The trophic ecology of many fish species in cold temperate lakes is often characterized by a generalist or opportunist strategy. In this study, the diets of polytrophic brown trout in Loch Ness, Scotland, have been examined using stable isotopes of carbon and nitrogen to complement gut content analyses and aging by otolith annuli counts. Using the stable isotope ratios, it was possible to trace trout ontogeny from parr development in a natal river to piscivory in the pelagic. Potential dilution of maternal isotope signatures from eggs to parr was also demonstrated. Despite the low productivity of the loch, intraspecific variability in isotope ratios suggested dietary specialization, rather than opportunism, in some individuals.",
keywords = "Salmo trutta, ontogeny, gut contents, stable isotopes, Loch Ness",
author = "Jonathan Grey",
year = "2001",
month = sep,
doi = "10.1034/j.1600-0633.2001.100306.x",
language = "English",
volume = "10",
pages = "168--176",
journal = "Ecology of Freshwater Fish",
issn = "0906-6691",
publisher = "Blackwell Munksgaard",
number = "3",

}

RIS

TY - JOUR

T1 - Ontogeny and dietary specialization in brown trout (Salmo trutta L.) from Loch Ness, Scotland, examined using stable isotopes of carbon and nitrogen

AU - Grey, Jonathan

PY - 2001/9

Y1 - 2001/9

N2 - The trophic ecology of many fish species in cold temperate lakes is often characterized by a generalist or opportunist strategy. In this study, the diets of polytrophic brown trout in Loch Ness, Scotland, have been examined using stable isotopes of carbon and nitrogen to complement gut content analyses and aging by otolith annuli counts. Using the stable isotope ratios, it was possible to trace trout ontogeny from parr development in a natal river to piscivory in the pelagic. Potential dilution of maternal isotope signatures from eggs to parr was also demonstrated. Despite the low productivity of the loch, intraspecific variability in isotope ratios suggested dietary specialization, rather than opportunism, in some individuals.

AB - The trophic ecology of many fish species in cold temperate lakes is often characterized by a generalist or opportunist strategy. In this study, the diets of polytrophic brown trout in Loch Ness, Scotland, have been examined using stable isotopes of carbon and nitrogen to complement gut content analyses and aging by otolith annuli counts. Using the stable isotope ratios, it was possible to trace trout ontogeny from parr development in a natal river to piscivory in the pelagic. Potential dilution of maternal isotope signatures from eggs to parr was also demonstrated. Despite the low productivity of the loch, intraspecific variability in isotope ratios suggested dietary specialization, rather than opportunism, in some individuals.

KW - Salmo trutta

KW - ontogeny

KW - gut contents

KW - stable isotopes

KW - Loch Ness

U2 - 10.1034/j.1600-0633.2001.100306.x

DO - 10.1034/j.1600-0633.2001.100306.x

M3 - Journal article

VL - 10

SP - 168

EP - 176

JO - Ecology of Freshwater Fish

JF - Ecology of Freshwater Fish

SN - 0906-6691

IS - 3

ER -