Comparison of losses of planktivorous fish by predation and seine‐fishing in a lake undergoing long‐term biomanipulation

Wysujack, Klaus; Mehner, Thomas

doi:10.1046/j.1365-2427.2002.00994.x

Cited by 27 publications

(22 citation statements)

References 57 publications

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“…Fish were modelled to grow between 1 May and 31 October. Consumption, respiration, egestion and excretion rates were parameterized for pike according to the standard bioenergetics model (Hanson et al 1997) with modiWcations with respect to maximum and optimum respiration temperatures (Wysujack and Mehner 2002).…”

Section: Bioenergeticsmentioning

confidence: 99%

Coexistence of behavioural types in an aquatic top predator: a response to resource limitation?

et al. 2009

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Intra-population variation in behaviour unrelated to sex, size or age exists in a variety of species. The mechanisms behind behavioural diversification have only been partly understood, but density-dependent resource availability may play a crucial role. To explore the potential coexistence of different behavioural types within a natural fish population, we conducted a radio telemetry study, measuring habitat use and swimming activity patterns of pike (Esox lucius), a sit-and-wait predatory fish. Three behavioural types co-occurred in the study lake. While two types of fish only selected vegetated littoral habitats, the third type opportunistically used all habitats and increased its pelagic occurrence in response to decreasing resource biomasses. There were no differences in size, age or lifetime growth between the three behavioural types. However, habitat-opportunistic pike were substantially more active than the other two behavioural types, which is energetically costly. The identical growth rates exhibited by all behavioural types indicate that these higher activity costs of opportunistic behaviour were compensated for by increased prey consumption in the less favourable pelagic habitat resulting in approximately equal fitness of all pike groups. We conclude that behavioural diversification in habitat use and activity reduces intraspecific competition in preferred littoral habitats. This may facilitate the emergence of an ideal free distribution of pike along resource gradients.

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Section: Bioenergeticsmentioning

confidence: 99%

Coexistence of behavioural types in an aquatic top predator: a response to resource limitation?

et al. 2009

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“…Species-specific parameters for perch were taken from Kitchell et al (1977), for northern pike from Bevelhimer et al (1985), and for pikeperch from Wysujack and Mehner (2002). Percent composition by mass on a monthly basis was used as diet input.…”

Section: Growth and Consumption Estimatesmentioning

confidence: 99%

Response of the residential piscivorous fish community to introduction of a new predator type in a mesotrophic lake

Schulze¹,

Baade²,

Dörner³

et al. 2006

Can. J. Fish. Aquat. Sci.

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Although the effects of introduced predators on prey populations in aquatic ecosystems have been studied frequently, less is known about the interactions between predators. We performed a whole-lake experiment by stocking a non-native top predator (pikeperch (Sander lucioperca)) to two residential piscivores (Eurasian perch (Perca fluviatilis) and northern pike (Esox lucius)). By analyzing spatial distribution, diet composition, growth, and consumption rates of the piscivores before and after pikeperch introduction, we tested how both density-dependent and trait-mediated responses affected interactions between the three predators. Total piscivore biomass increased 1.5 times and annual consumption by the piscivores increased 1.7 times after stocking, attributable to the stocked pikeperch and increased northern pike abundances. Abundance, distribution, and consumption data indicated that northern pike was hardly affected by pikeperch stocking and even increased its biomass, whereas piscivorous perch shifted its habitat use towards the littoral lake areas in response to competition with pikeperch. Furthermore, all piscivores increasingly fed on small perch. The forced habitat shift of piscivorous perch in combination with increased predation on small perch led to a decreased abundance of large perch, attributable to the compensatory effects of intraguild predation and cannibalism.Résumé : Alors que les effets des prédateurs introduits sur les populations de proies dans les écosystèmes aquatiques ont souvent été étudiés, les interactions entre les prédateurs eux-mêmes sont moins bien connues. Dans une expérience à l'échelle d'un lac, nous avons ajouté un prédateur supérieur non indigène (« pikeperch » (Sander lucioperca)) à un peuplement de poissons ichtyophages résidents (la perche (Perca fluviatilis) et le grand brochet (Esox lucius)).

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“…comm.) and in two German long‐term studies, in the Bautzen Reservoir (Benndorf, 1995) and in Lake Feldberger Haussee (Wysujack & Mehner, 2002). No study dealing with food and feeding of eels within the context of biomanipulation, however, has been presented so far.…”

Section: Stock (A) and Anglers' Yield (B) Of Eels In The Bautzen Resementioning

confidence: 99%

Piscivory by large eels on young‐of‐the‐year fishes: its potential as a biomanipulation tool

Dörner

Benndorf

2003

Journal of Fish Biology

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Strong piscivory by eels Anguilla anguilla, which were regularly stocked in the Bautzen Reservoir, Germany, as a biomanipulation tool, was observed, with the number of fishes per stomach containing fish being 2· 2 ± 1·3 (mean ± s.d.). The 0+ year perch Perca fluviatilis was the most frequent prey item (54%), and 0+ year pikeperch Sander lucioperca was the most important prey in terms of biomass (45%).

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Comparison of losses of planktivorous fish by predation and seine‐fishing in a lake undergoing long‐term biomanipulation

Cited by 27 publications

References 57 publications

Coexistence of behavioural types in an aquatic top predator: a response to resource limitation?

Coexistence of behavioural types in an aquatic top predator: a response to resource limitation?

Response of the residential piscivorous fish community to introduction of a new predator type in a mesotrophic lake

Piscivory by large eels on young‐of‐the‐year fishes: its potential as a biomanipulation tool

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