Habitat preference increases territorial defence in brown trout (Salmo trutta)

By J. Johnsson, Magnus Carlsson, L. Sundström. Behavioral Ecology and Sociobiology, 2000

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Hatchery selection promotes boldness in newly hatched brown trout (Salmo trutta): implications for dominance (2004, background): “In the afternoon, we paired the fish with increasing rank differences (rank 10 versus rank 11 and so on until rank 1 was paired with rank 20) before they were put together in a new aquarium, unfamiliar to both fish, to avoid owner effects (Johnsson et al., 2000).”
The function of food-associated calls in white-faced capuchin monkeys, Cebus capucinus, from the perspective of the signaller (2004, background): “Clear establishment of ownership may function to decrease harassment because it reflects the resource value to the owner (cf. Krebs 1982; Gosling 1990; Dearborn 1998; Riechert 1998; Johnsson et al. 2000) and thus provides information for a challenger about the likelihood of being counter-challenged ”
Investment in territorial defence depends on rearing environment in brown trout (Salmo trutta) (2003, methodology): “Furthermore, the trout used by Johnsson et al. (2000) were older, and gravel preference appears to develop with age in brown trout (unpublished data).”