@article {7897,
	title = {Is a cannibal different from its conspecifics? A behavioural, morphological, muscular and retinal structure study with pikeperch juveniles under farming conditions},
	journal = {Applied Animal Behaviour Science},
	volume = {224},
	year = {2020},
	month = {Jan-03-2020},
	pages = {104947},
	abstract = {Most studies carried out on personality recognized that personality is defined by behavioural traits consistent through time and/or contexts. In\&nbsp;fish, most studies on personality were performed either on juveniles (aged between 6 months and 1 year) or adults, but very few focused on the early life stages. The main goal of this study is to characterize behavioural syndromes and to highlight the existence of a personality in young juvenile pikeperch, a species with a strong economic value. To study the consistency of behavioural responses of juvenile (50 and 64 days post-hatch) pikeperch\&nbsp;Sander lucioperca\&nbsp;(n = 41, total length = 5.8 {\textpm} 1.0 cm and mass = 1.6 {\textpm} 0.7 g), we performed three tests per\&nbsp;fish in one day: exploration (cross-maze), dyadic and restraint test. In the cross-maze test, exploratory\&nbsp;fish were more active and bolder. In the dyadic test,\&nbsp;fish with the highest number of contacts, showed also more approaches, orientations and avoidance behaviours. In the restraint test, bolder\&nbsp;fish were more active and tried to escape more often. Consequently, the investigation of the different behavioural responses of each\&nbsp;fish highlighted behavioural syndromes in this species. Furthermore, for the\&nbsp;first time, we showed, with a cross-context analysis, that young juvenile pikeperch, responded in the same way to exploration and dyadic test but their responses were opposite in the restraint test. Our results opened new opportunities for testing individual personality in very young\&nbsp;fish that may help solving some aquaculture problems, such as intra-cohort cannibalism.},
	keywords = {Behavioural syndromes, behavioural tests, Individual personality, Pikeperch juveniles, Sander lucioperca},
	issn = {01681591},
	doi = {10.1016/j.applanim.2020.104947},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0168159120300228},
	author = {Tatiana Colchen and Gisbert, E and Ledor{\'e}, Y and Teletchea, F and Fontaine, P and Pasquet, A}
}
@article {7896,
	title = {The onset of piscivory in a freshwater fish species: analysis of behavioural and physiological traits},
	journal = {Journal of Fish Biology},
	volume = {96},
	year = {2020},
	month = {Jan-06-2020},
	pages = {1463 - 1474},
	abstract = {The onset of piscivory in fish, resulting in a shift from zooplankton or invertebrate to fish prey, was studied on pikeperch (Sander lucioperca) larvae displaying and not dis- playing piscivorous behaviour at different ages (23, 30, 37, 44 and 52 days post- hatching) using behavioural (attack, capture and swimming activity), morphological (allometry) and digestive enzymatic (trypsin,\&nbsp;α-amylase and pepsin) analyses. The shift from zooplanktonic food items (Artemia\&nbsp;nauplii) to a piscivorous diet did not occur at the same time for all individuals within the same cohort. Predation tests, conducted under controlled conditions (20C;\&nbsp;ad libitum\&nbsp;feeding), showed that some larvae attacked fish prey as early as the age of 3 weeks [11.0 {\textpm} 1.3 mm total length (TL)], whereas others did not start until the age of 6 weeks (16.6 {\textpm} 1.9 mm TL). Piscivorous individuals were bigger, with larger heads, longer tails, higher acid protease and lower alkaline protease activities, than non-piscivorous conspecifics. In conclusion, high interindividual variability in morphological and digestive system developments linked to the development of predatory abilities could induce cannibalism in fish.},
	keywords = {behavioural tests, early life stages, freshwater fish, predatory behaviour, Sander lucioperca},
	issn = {0022-1112},
	doi = {10.1111/jfb.v96.610.1111/jfb.14322},
	url = {https://onlinelibrary.wiley.com/toc/10958649/96/6},
	author = {Tatiana Colchen and Dias, Andr{\'e}a and Gisbert, Enric and Teletchea, Fabrice and Fontaine, Pascal and Pasquet, Alain}
}
@article {7895,
	title = {What is the best combination of modalities of twelve environmental, feeding and populational factors to improve pikeperch larval rearing in recirculating aquaculture systems?},
	journal = {Aquaculture Reports},
	volume = {17},
	year = {2020},
	month = {Jan-07-2020},
	pages = {100337},
	abstract = {Pikeperch (Sander lucioperca) has a high potential for inland aquaculture diversification in Europe. Bottlenecks (i.e. low survival, cannibalism and deformity rates) hamper further expansion of pikeperch culture, because of the weak production performances at the nursery level. To improve the production of pikeperch juveniles under recirculation system we used a pilot scale larval rearing system (700 L tanks) and multifactorial designs. Three successive larval rearing trials (duration: 35-49 days) were conducted to identify the best combination of en- vironmental, feeding and population factors. Considering the main significant effects observed on survival, growth, swim bladder inflation rates and biomass gain, a favourable combination of twelve factor (F) modalities was proposed (F1- initial density: 100 larvae.L-1, F2- no sorting of fish jumper, F3- no sibling population, F4- eggs from large females, F5- discontinuous feeding, F6- no co-feeding, F7- light intensity: 50 lx, F8- beginning of the weaning at 16 dph (days post-hatching), F9- weaning duration: 9 days, F10- water renewal rate of 100 \% per hour, F11- tank cleaning during morning and F12- tank bottom-up water current). A final validation step was realized over a last trial (seven replicates, duration: 49 days), and validated with the best productive results obtained over the global experimental period (2015-2018). These results were: a final body weight of 815.64 {\textpm} 95.34 mg, a survival rate of 16.9 {\textpm} 1.7 \%, a specific growth rate of 15.1 {\textpm} 5.9 \%.d-1, a final fish biomass of 9.55{\textpm}0.23 kg, a swim bladder inflation rate of 92.6{\textpm}3.2 \% and a food conversion rate of 0.65 {\textpm} 0.02 (dry food). The final stocking density was 13.6 kg.m-3\&nbsp;of rearing volume. Authors were able to validate and provide a reliable basic protocol for pikeperch larval rearing using recirculating units.},
	keywords = {early life stages, fish farming, multifactorial design, recirculating aquaculture system, Sander lucioperca},
	issn = {23525134},
	doi = {10.1016/j.aqrep.2020.100337},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S2352513419304983},
	author = {Tatiana Colchen and Gisbert, E. and Krauss, D. and Ledor{\'e}, Y. and Pasquet, A. and Fontaine, P.}
}
@article {7898,
	title = {Does Addition of Perch Larvae as Prey Affect the Growth, Development and Cannibalism Rate of Pikeperch Larvae?},
	journal = {Fishes},
	volume = {4},
	year = {2019},
	month = {Jan-03-2019},
	pages = {21},
	abstract = {Cannibalism occurs in many cultured fish species, especially at the larval and juvenile stages of piscivorous taxa. In farmed percid species, such as pikeperch (Sander lucioperca), intra-cohort cannibalism is a major issue inducing significant losses of the initial stocking density during the first weeks of rearing. Therefore, the present study was designed to investigate the effects of perch larvae (Perca fluviatilis) as live prey on growth, survival and cannibalism in pikeperch larvae under experimental conditions. Additionally, zootechnical and behavioural variables linked to aggressiveness (S postures, attacks, bites and ingestion), and group structures were considered. The survival rate was not different between the two groups (72\% with prey vs. 69\% without prey), but the cannibalism rate was higher in the group with the prey (28\% vs. 10\%). The means of final weight and length of pikeperch larvae were higher in the group fed with perch larvae, but size heterogeneity measured by the coefficients of variation for these two parameters did not differ. The specific growth rate was higher in the group fed with perch larvae, but there was no difference between the two groups concerning Fulton{\textquoteright}s condition factor. Among all the behavioural variables (aggressiveness, group structure), none differed between the two groups.},
	keywords = {aggressiveness, Cannibalism, forage prey, Growth, Sander lucioperca, size heterogeneity},
	doi = {10.3390/fishes4010021},
	url = {https://www.mdpi.com/2410-3888/4/1/21},
	author = {Cortay, A and Tatiana Colchen and Fontaine, P and Pasquet, A}
}
@article {7900,
	title = {Is personality of young fish consistent through different behavioural tests?},
	journal = {Applied Animal Behaviour Science},
	volume = {194},
	year = {2017},
	month = {Jan-09-2017},
	pages = {127 - 134},
	abstract = {Most studies carried out on personality recognized that personality is defined by behavioural traits consistent through time and/or contexts. In\&nbsp;fish, most studies on personality were performed either on juveniles (aged between 6 months and 1 year) or adults, but very few focused on the early life stages. The main goal of this study is to characterize behavioural syndromes and to highlight the existence of a personality in young juvenile pikeperch, a species with a strong economic value. To study the consistency of behavioural responses of juvenile (50 and 64 days post-hatch) pikeperch\&nbsp;Sander lucioperca\&nbsp;(n = 41, total length = 5.8 {\textpm} 1.0 cm and mass = 1.6 {\textpm} 0.7 g), we performed three tests per\&nbsp;fish in one day: exploration (cross-maze), dyadic and restraint test. In the cross-maze test, exploratory\&nbsp;fish were more active and bolder. In the dyadic test,\&nbsp;fish with the highest number of contacts, showed also more approaches, orientations and avoidance behaviours. In the restraint test, bolder\&nbsp;fish were more active and tried to escape more often. Consequently, the investigation of the different behavioural responses of each\&nbsp;fish highlighted behavioural syndromes in this species. Furthermore, for the\&nbsp;first time, we showed, with a cross-context analysis, that young juvenile pikeperch, responded in the same way to exploration and dyadic test but their responses were opposite in the restraint test. Our results opened new opportunities for testing individual personality in very young\&nbsp;fish that may help solving some aquaculture problems, such as intra-cohort cannibalism.},
	keywords = {Behavioural syndromes, behavioural tests, Individual personality, Pikeperch juveniles, Sander lucioperca},
	issn = {01681591},
	doi = {10.1016/j.applanim.2017.05.012},
	url = {https://linkinghub.elsevier.com/retrieve/pii/S0168159117301545},
	author = {Tatiana Colchen and Faux, E. and Teletchea, F. and Pasquet, A.}
}
