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

By J. Grey. 2001

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Stable Isotope Variability in Tissues of Temperate Stream Fishes (2005, background): “The 13C content of fish egg tissue is universally less than that of muscle (Kline et al. 1993; McCarthy and Waldron 2000; Grey 2001), typically because of the high proportion of lipids that are 13C-depleted (DeNiro and Epstein 1977).”
Atlantic salmon Salmo salar L., brown trout Salmo trutta L. and Arctic charr Salvelinus alpinus (L.): a review of aspects of their life histories (2003, background): “At the individual level, on the other hand, the fish may exhibit dietary specialisation, rather than opportunism, meaning that some individuals at least for periods of time, feed chiefly on one food item such as chironomid larvae whereas others chiefly take zooplankton (Grey 2001).”
Feeding habits and trophic levels of bluefin tuna Thunnus thynnus of different size classes in the Mediterranean Sea (2007, background): “…gut content analysis (Pauly et al., 1998; Pinnegar et al., 2003), stable isotopes have already been used to detect ontogenetic diet shifts in fish (e.g. brown trout (Grey, 2001); dusky grouper (Renones et al., 2002); migrating salmon smolts (Kline and Willette, 2002); sardine (Bode et al., 2004).”