Influence of predation risk on individual competitive ability and growth in Eurasian perch, Perca fluviatilis

Westerberg, Magdalena; Staffan, Fia; Magnhagen, Carin

doi:10.1016/j.anbehav.2003.06.003

Cited by 50 publications

(49 citation statements)

References 19 publications

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“…The predators used were 2-year-old perch, with body lengths 20-23 cm, which had been caught in July 2002, raised in the laboratory, and fed dry feed. The presence of a predator was used to reinforce individual differences in time spent in the open within groups of perch, since this effect was found in a previous study (Westerberg et al 2004).…”

Section: Aquarium Studymentioning

confidence: 96%

“…In previous studies, we have found individual variation in boldness within small groups of perch Perca fluviatilis, measured in aquaria as time spent foraging in an open habitat and number of prey attacks, in the presence of a predator (Westerberg et al 2004;Magnhagen and Staffan 2005). In this study, I investigated whether young-of-the-year (YOY) perch from different populations differed in these risk-taking behaviours.…”

Section: Introductionmentioning

confidence: 97%

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Risk-taking behaviour in foraging young-of-the-year perch varies with population size structure

Magnhagen

2005

Oecologia

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I investigated if risk-taking behaviour of young-of-the-year (YOY) perch Perca fluviatilis was connected with population-specific predation patterns in four lakes in northern Sweden. The lakes differ in perch size distribution, according to earlier fishing surveys. Thus, the most intense predation pressure by cannibals is assumed to occur at different prey-size windows in the four lakes. In an aquarium study, I observed groups of perch, and registered time spent foraging in an open habitat and number of prey attacks in the presence of a predator. Perch from Angersjön, with the highest proportion of large fish in the population, spent more time in the open area than those from Fisksjön that has a dense population of mainly small perch. The Angersjön perch also made more prey attacks than did perch from Fisksjön and Bjännsjön. Relative differences in predation risk in the four lakes were estimated as cannibalistic attack rates, on a range of sizes of YOY perch, calculated from population size distributions. Principal component analysis on predation risk patterns resulted in two components, of which PC1 explained 79.1% of the variation. High scores of PC1 indicated low cannibalistic attack rates on smaller perch (10-20 mm) and high rates on larger fish (> or =30 mm), while low scores indicated the opposite. The level of risk-taking behaviour in the aquarium study positively correlated with lake-specific PC1 scores. The perch with the most cautious behaviour in the aquaria originated from the population with the highest predation pressure on early stages. The boldest perch came from the lake with low predation on the smallest, but with higher predation on larger YOY perch. Thus, the influence of predation risk on behaviour patterns in perch may depend on the timing of the highest exposure to predators.

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Section: Aquarium Studymentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Risk-taking behaviour in foraging young-of-the-year perch varies with population size structure

Magnhagen

2005

Oecologia

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“…Behavioural measurements in each session started 10 min after the divers had reached their assigned position and had fixed the video cameras in the tuna trap. This familiarised the fish with the divers' presence (Romero 2004, Westerberg et al 2004). Data were collected using the focal sampling method (Martin & Bateson 1993), and the analysed interval length for each phase was 5 min.…”

Section: Methodsmentioning

confidence: 99%

“…During these periods, 2 different schools, each of about 50 tuna (total weight 40.5 ± 21.0 kg and 54.0 ± 4.9 kg, respectively), entered the trap. In order to avoid interference from any kind of stress, measurements were not started until 2 to 3 d after the tuna had entered the trap to allow the tuna (Mork et al 1999, Romero 2004, Westerberg et al 2004. Observations were carried out using 3 SONY Hi-8 video cameras encapsulated in waterproof boxes (NIMAR).…”

Section: Methodsmentioning

confidence: 99%

Effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus in the Mediterranean Sea

Sarà¹,

Dean²,

DAmato³

et al. 2007

Mar. Ecol. Prog. Ser.

155

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The effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus was investigated\ud in the Egadi Islands, Sicily, during spring 2005 using a fixed tuna trap set near shipping routes.\ud Tuna behaviour was observed when exposed to both natural ambient sound and sound generated by\ud hydrofoil passenger ferries, small boats and large car ferries. Acoustical and behavioural analyses\ud were conducted with and without extraneous sound to define a list of behavioural categories. Each\ud vessel produced different engine sounds with regard to their composition and bandwidth, and all\ud were distinctly different from ambient sound levels. In the absence of boat noise, tuna assumed a concentrated\ud coordinated school structure with unidirectional swimming and without a precise shape.\ud When a car ferry approached, tuna changed swimming direction and increased their vertical movement\ud toward surface or bottom; the school exhibited an unconcentrated structure and uncoordinated\ud swimming behaviour. Hydrofoils appeared to elicit a similar response, but for shorter periods. Agonistic\ud behaviour was more evident when exposed to sounds from outboard motors of small boats. This\ud study showed that local noise pollution generated by boats produced behavioural deviations in tuna\ud schools. Schooling enhances tuna homing accuracy during their spawning migration, and an alteration\ud in schooling behaviour can affect the accuracy of their migration to spawning and feeding\ud grounds

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“…Dominance hierarchies in small groups of fishes are often established through aggressive behaviour of dominant individuals towards subordinate individuals [51,52]. Aggressive behaviour in small groups of perch has been observed in a few cases [53] but often no aggression can be observed [54]. Whether aggressive behaviour leads to dominance hierarchies in perch is unclear.…”

Section: Body Size Datamentioning

confidence: 99%

Growth and Energy Expenditures of Eurasian Perch Perca fluviatilis (Linnaeus) in Different Temperatures and of Different Body Sizes

Strand¹,

Magnhagen²,

Alanärä³

2011

J Aquac Res Development

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Influence of predation risk on individual competitive ability and growth in Eurasian perch, Perca fluviatilis

Cited by 50 publications

References 19 publications

Risk-taking behaviour in foraging young-of-the-year perch varies with population size structure

Risk-taking behaviour in foraging young-of-the-year perch varies with population size structure

Effect of boat noise on the behaviour of bluefin tuna Thunnus thynnus in the Mediterranean Sea

Growth and Energy Expenditures of Eurasian Perch Perca fluviatilis (Linnaeus) in Different Temperatures and of Different Body Sizes

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