The importance of being familiar: individual recognition and social behavior in sea trout (<i>Salmo trutta</i>)

Höjesjö, Johan; Johnsson, Jörgen I.; Petersson, Erik; Järvi, Torbjörn

doi:10.1093/beheco/9.5.445

Cited by 157 publications

(101 citation statements)

References 25 publications

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“…For example, previous work with fish has shown that shoals of familiar individuals outperform randomly assembled shoals in foraging tasks (Morrell et al 2008) and display more coordinated antipredator behaviour, which is thought to lead to a reduced risk of predation (Chivers et al 1995). Social familiarity is also known to be important for mediating aggression (Utne-Palm & Hart 2000) and stabilizing group hierarchy (Hö jesjö et al 1998). Thus, one may hypothesize that female groups with reduced social familiarity due to male harassment may suffer decreased foraging success, increased predation risk and increased aggression.…”

Section: Discussionmentioning

confidence: 99%

Social implications of the battle of the sexes: sexual harassment disrupts female sociality and social recognition

et al. 2009

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Across sexually reproducing species, males and females are in conflict over the control of reproduction. At the heart of this conflict in a number of taxa is male harassment of females for mating opportunities and female strategies to avoid this harassment. One neglected consequence that may result from sexual harassment is the disruption of important social associations. Here, we experimentally manipulate the degree of sexual harassment that wild female guppies (Poecilia reticulata) experience by establishing replicated, semi-natural pools with different population sex ratios. We quantify the effects of sexual harassment on female social structure and the development of social recognition among females. When exposed to sexual harassment, we found that females had more disparate social networks with limited repeated interactions when compared to females that did not experience male harassment. Furthermore, females that did not experience harassment developed social recognition with familiar individuals over an 8-day period, whereas females that experienced harassment did not, an effect we suggest is due to disruption of association patterns. These results show that social network structure and social recognition can be affected by sexual harassment, an effect that will be relevant across taxonomic groups and that we predict will have fitness consequences for females.

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Section: Discussionmentioning

confidence: 99%

Social implications of the battle of the sexes: sexual harassment disrupts female sociality and social recognition

et al. 2009

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“…Morris et al, 1995;Höjesjo et al, 1998). Rainbow trout are aggressive animals that, under some circumstances, fight each other to form and maintain dominance hierarchies or territories (Abbott and Dill, 1985).…”

Section: Fish Behaviour and Internal Representationsmentioning

confidence: 99%

Can fish suffer?: perspectives on sentience, pain, fear and stress

Chandroo

Duncan

Moccia

2004

Applied Animal Behaviour Science

338

165

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In contrast to other major forms of livestock agriculture, there is a paucity of scientific information on the welfare of fish raised under intensive aquacultural conditions. This reflects an adherence to the belief that these animals have not evolved the salient biological characteristics that are hypothesised to permit sentience. In this review, we evaluate the scientific evidence for the existence of sentience in fish, and in particular, their ability to experience pain, fear and psychological stress. Teleost fish are considered to have marked differences in some aspects of brain structure and organization as compared to tetrapods, yet they simultaneously demonstrate functional similarities and a level of cognitive development suggestive of sentience. Anatomical, pharmacological and behavioural data suggest that affective states of pain, fear and stress are likely to be experienced by fish in similar ways as in tetrapods. This implies that fish have the capacity to suffer, and that welfare consideration for farmed fish should take these states into account. We suggest that the concept of animal welfare can be applied legitimately to fish. It is therefore appropriate to recognize and study the welfare of farmed fish.

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“…There is abundant direct and indirect evidence that territorial vertebrates are capable of individual recognition (e.g. Catchpole & Slater 1995;Gray & Hurst 1997;Hojesjo et al 1998;Owen & Perrill 1998), so this assumption seems reasonable for this taxon, at least. The second assumption, that an individual's aggressive behaviour with one opponent can vary independently of its aggressive behaviour towards other opponents, has been amply validated in species that form dominant-subordinate relationships (review in Drews 1993), and is also likely to apply to many territorial species (Stamps 1999).…”

Section: Caveats and Future Directionsmentioning

confidence: 99%

When should a territory resident attack?

2001

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Models of territorial defence tend to omit two characteristics of many territorial systems: repeated intrusions by the same individual and the learning processes of residents and intruders. Here we present state-dependent, dynamic models of feeding territories, designed to investigate temporal patterns of resident aggression towards intruders that are capable of spatial learning. We compare two types of models: (1) a nomadic intruder model, in which intruders never visit the same territory twice, and (2) a single, repeat intruder model, in which an intruder may repeatedly intrude into a given territory but is less likely to do so after being attacked. These two models produce qualitatively and quantitatively different patterns of aggression by residents. For instance, residents with intruders that may repeatedly intrude have high initial attack rates, regardless of initial probability of intrusion, but their attack rates decline over time. In contrast, residents in the nomadic intruder model do not attack intruders if intrusion rates are moderately high, and their attack rates are constant and high for most of the period of territory tenure. In addition, residents of both nomadic and repeat intruder scenarios stopped attacking intruders for a short period before voluntarily abandoning their feeding territories. The results of our models suggest that repeated intrusions and learning processes have a dramatic effect on territorial defence.  2001 The Association for the Study of Animal BehaviourFor many years, models have played an important role in advancing our understanding of the role of aggression in territorial species. However, a dichotomy has arisen between models investigating territories and models investigating aggressive behaviour. Most territory models focus on an individual versus the rest of the population, and consider such questions as when space should be defended, how much space should be defended, or what shape a territory should be (e.g.

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The importance of being familiar: individual recognition and social behavior in sea trout (Salmo trutta)

Cited by 157 publications

References 25 publications

Social implications of the battle of the sexes: sexual harassment disrupts female sociality and social recognition

Social implications of the battle of the sexes: sexual harassment disrupts female sociality and social recognition

Can fish suffer?: perspectives on sentience, pain, fear and stress

When should a territory resident attack?

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