english
français
RP2E INRA Université de Lorraine

Publications

Intra-cohort cannibalism in early life stages of pikeperch

Aquaculture Research, 50 (3), pp. 915-924.

Colchen, T., Fontaine, P., Ledore, Y., Teletchea, F., Pasquet, A.

2019

Cannibalism has been described in 390 teleost fish species belonging to 104 families. In rearing conditions, intra?cohort cannibalism is one of the major bottlenecks during the early life stages of pikeperch (Sander lucioperca). This study aims to describe precisely the occurrence and the onset of cannibalism of this species during the first two post?hatching months. In a first step, the cannibalistic behaviour was analysed through observations in three experiments. In each experiment, the number of cannibalistic cases was similar. From 14 to 48 days post?hatching (dph), more than 60 % of prey ingestions were realized by tail?first, but after 48 dph, the number of prey ingestions by head?first increased. In a second step, the behavioural sequence exhibited to attack and to capture a conspecific was analysed, taking into account the size ratio between the cannibal and its prey. The behavioural sequence to capture was always the same, similar to a predatory sequence and it seems that the cannibal chose its prey about 10 s before attacking. Moreover, prey choice by a cannibal was based more on the size ratio between the cannibal and its prey than the previous activity of the potential prey. These new results could lead to solutions to decrease cannibalism in pikeperch rearing.

Imprimer le document

219 Publications depuis 2014

Imprimer le listing

2019

ACL - Articles comité de lecture référencés bases de données HCÉRES

ACLN - Articles comité de lecture non-référencés bases de données HCÉRES

2018

ACL - Articles comité de lecture référencés bases de données HCÉRES

ACLN - Articles comité de lecture non-référencés bases de données HCÉRES

2017

ACL - Articles comité de lecture référencés bases de données HCÉRES

ACLN - Articles comité de lecture non-référencés bases de données HCÉRES

2016

ACL - Articles comité de lecture référencés bases de données HCÉRES

2015

ACL - Articles comité de lecture référencés bases de données HCÉRES

ACLN - Articles comité de lecture non-référencés bases de données HCÉRES

2014

ACL - Articles comité de lecture référencés bases de données HCÉRES

ACLN - Articles comité de lecture non-référencés bases de données HCÉRES

Voir les productions antérieures

Toutes les productions scientifiques