Is a cannibal different from its conspecifics? A behavioural, morphological, muscular and retinal structure study with pikeperch juveniles under farming conditions

Colchen, Tatiana; Gisbert, Enric; Ledoré, Yannick; Teletchea, Fabrice; Fontaine, Pascal; Pasquet, Alain

doi:10.1016/j.applanim.2020.104947

Cited by 7 publications

(2 citation statements)

References 63 publications

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“…They corresponded to dead fish or fish that were not found at the end of the experiment for pikeperch. The loss of individuals could be linked to cases of cannibalism, a common behaviour for this species [53] and observed twice in our experiment. For the sterlet, the mortality rates were mainly explained by fish reaching the limit point defined in the study (FCF less than 0.27), which refers to lean fish and are thus out of the experimental protocol.…”

Section: Discussionmentioning

confidence: 57%

Enrichment in a Fish Polyculture: Does it Affect Fish Behaviour and Development of Only One Species or Both?

et al. 2022

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Physical enrichment of structures has been used for the last decades in aquaculture to improve fish production and welfare. Until now, this enrichment has been practiced in fish monoculture but not in fish polyculture. In this study, we developed a polyculture of two freshwater species (pikeperch and sterlet) in recirculated systems (tank of 2.4 m3) with or without physical structures for enrichment. Two types of structures were used: a cover plank on a part of the tank decreasing the light intensity and vertical pipes modifying the water flow. The experiment was conducted in triplicate for a three-month period with juvenile fishes (143 ± 41 g and 27.3 ± 2.2 cm for pikeperch and 133 ± 21 g and 32.8 ± 1.6 cm for sterlet). Behavioural (space occupation and abnormal behaviours) and morphological (total length, final weight, Fulton condition factor, coefficient of variation of the final weight, percentage of biomass gain and specific growth rate) traits were measured. The pikeperch changed their space occupation and showed a preference for low light areas. Sterlet also changed their space occupation: they did not use the cover and occurred mainly in the part of the tank without enrichment. There was no difference for the frequency of abnormal behaviours for pikeperch and sterlet between the two sets (with or without enrichment). There was no statistical difference between the two sets for all the morphological and growth parameters no matter the species and the rearing modality.

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Section: Discussionmentioning

confidence: 57%

Enrichment in a Fish Polyculture: Does it Affect Fish Behaviour and Development of Only One Species or Both?

et al. 2022

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“…Species that have a predestined predatory nature and can do cannibalism are Arachnoidea. The Arachnoidea, the most extreme types of predators practicing cannibalism are the Latrodectus genus and Thomisidae [19] [20]. The monotonic function used in the Holling Type I response function is simple and has many species that match the characteristics of this type.…”

Section: Introductionmentioning

confidence: 99%

Dynamics Twin Cannibalism of Two Predator and Two Prey System with Prey Defense

et al. 2022

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The study discusses the condition of the existence of all non-negative equilibrium points. There are 9 realistic equilibrium points from the constructed model. A local stable condition is obtained, a point of equilibrium that is completely biologically feasible. The analytical method on the mathematically formed model is limited, so numerical simulation is also given to explore the model. Numerical simulation is intervened in a model that will show growth in trajectories. The tendency of trajectories in prey one and predator one species is relatively the same because the interactions that occur are intensive. Likewise, prey two and predator two occur, and the interactions that occur cause population growth grow to fluctuate. Differences occur in both types of species, namely predator-prey one and predator-prey two. In the one interaction group, growth tends to be more volatile and moves slowly towards the point of stability in population growth. Incidence is inversely proportional to the interaction of species two which tend to be faster towards the stability point. In general, the results of numerical simulations show that there is a pattern formation in the predator-prey system that grows sustainabley.

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The relationship between personality and the collective motion of schooling fish

Tang

2020

J Ethol

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Is a cannibal different from its conspecifics? A behavioural, morphological, muscular and retinal structure study with pikeperch juveniles under farming conditions

Abstract: Is a cannibal different from its conspecifics? A behavioural, morphological, muscular and retinal structure study with pikeperch juveniles under farming conditions.

Cited by 7 publications

References 63 publications

Enrichment in a Fish Polyculture: Does it Affect Fish Behaviour and Development of Only One Species or Both?

Enrichment in a Fish Polyculture: Does it Affect Fish Behaviour and Development of Only One Species or Both?

Dynamics Twin Cannibalism of Two Predator and Two Prey System with Prey Defense

The relationship between personality and the collective motion of schooling fish

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