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Internal state dynamics shape brainwide activity and foraging behaviour 期刊论文
NATURE, 2020, 577 (7789) : 239-+
作者:  Marques, Joao C.;  Li, Meng;  Schaak, Diane;  Robson, Drew N.;  Li, Jennifer M.
收藏  |  浏览/下载：19/0  |  提交时间：2020/07/03

The brain has persistent internal states that can modulate every aspect of an animal'  s mental experience(1-4). In complex tasks such as foraging, the internal state is dynamic(5-8). Caenorhabditis elegans alternate between local search and global dispersal(5). Rodents and primates exhibit trade-offs between exploitation and exploration(6,7). However, fundamental questions remain about how persistent states are maintained in the brain, which upstream networks drive state transitions and how state-encoding neurons exert neuromodulatory effects on sensory perception and decision-making to govern appropriate behaviour. Here, using tracking microscopy to monitor whole-brain neuronal activity at cellular resolution in freely moving zebrafish larvae(9), we show that zebrafish spontaneously alternate between two persistent internal states during foraging for live prey (Paramecia). In the exploitation state, the animal inhibits locomotion and promotes hunting, generating small, localized trajectories. In the exploration state, the animal promotes locomotion and suppresses hunting, generating long-ranging trajectories that enhance spatial dispersion. We uncover a dorsal raphe subpopulation with persistent activity that robustly encodes the exploitation state. The exploitation-state-encoding neurons, together with a multimodal trigger network that is associated with state transitions, form a stochastically activated nonlinear dynamical system. The activity of this oscillatory network correlates with a global retuning of sensorimotor transformations during foraging that leads to marked changes in both the motivation to hunt for prey and the accuracy of motor sequences during hunting. This work reveals an important hidden variable that shapes the temporal structure of motivation and decision-making.


  
Consistent sociality but flexible social associations across temporal and spatial foraging contexts in a colonial breeder 期刊论文
ECOLOGY LETTERS, 2020, 23 (7) : 1085-1096
作者:  Jones, Teri B.;  Green, Jonathan A.;  Patrick, Samantha C.;  Evans, Julian C.;  Wells, Melanie R.;  Rodriguez-Malagon, Marlenne A.;  Arnould, John P. Y.
收藏  |  浏览/下载：18/0  |  提交时间：2020/05/13
Coloniality  consistency  group formation  individual behaviour  multiplex networks  social flexibility  social foraging  sociality  seabirds  
Foraging plasticity allows a large herbivore to persist in a sheltering forest habitat: DNA metabarcoding diet analysis of the European bison 期刊论文
FOREST ECOLOGY AND MANAGEMENT, 2019, 449
作者:  Kowalczyk, Rafal;  Wojcik, Jan M.;  Taberlet, Pierre;  Kaminski, Tomasz;  Miquel, Christian;  Valentini, Alice;  Craine, Joseph M.;  Coissac, Eric
收藏  |  浏览/下载：23/0  |  提交时间：2019/11/27
Bialowieza Primeval Forest  Optimal foraging  Bison bonasus  Megaherbivores  Food niche  Foraging behaviour  Plant biomass  Habitat structure  Refugee species  
A mechanistic theory of personality-dependent movement behaviour based on dynamic energy budgets 期刊论文
ECOLOGY LETTERS, 2019, 22 (2) : 213-232
作者:  Campos-Candela, Andrea;  Palmer, Miquel;  Balle, Salvador;  Alvarez, Alberto;  Alos, Josep
收藏  |  浏览/下载：19/0  |  提交时间：2019/04/09
bioenergetics  dynamic energy budget (DEB) model  exploration rate  foraging behaviour  growth rate  home range  life history traits  metabolism  movement  personality  
Ecology shapes the evolutionary trade-off between predator avoidance and defence in coral reef butterflyfishes 期刊论文
ECOLOGY LETTERS, 2018, 21 (7) : 1033-1042
作者:  Hodge, Jennifer R.;  Alim, Chidera;  Bertrand, Nick G.;  Lee, Wesley;  Price, Samantha A.;  Tran, Binh;  Wainwright, Peter C.
收藏  |  浏览/下载：20/0  |  提交时间：2019/04/09
Chaetodontidae  constraint  coral reef ecology  evolutionary trade-off  foraging strategy  functional morphology  phylogenetic comparative method  predation risk  social behaviour  spines  
Intragroup competition predicts individual foraging specialisation in a group-living mammal 期刊论文
ECOLOGY LETTERS, 2018, 21 (5) : 665-673
作者:  Sheppard, Catherine E.;  Inger, Richard;  McDonald, Robbie A.;  Barker, Sam;  Jackson, Andrew L.;  Thompson, Faye J.;  Vitikainen, Emma I. K.;  Cant, Michael A.;  Marshall, Harry H.
收藏  |  浏览/下载：17/0  |  提交时间：2019/04/09
Banded mongoose  competition  foraging behaviour  foraging niche  group-living  Mungos mungo  social group  specialisation  stable isotope  
Increased autumn rainfall disrupts predator-prey interactions in fragmented boreal forests 期刊论文
GLOBAL CHANGE BIOLOGY, 2017, 23 (4)
作者:  Terraube, Julien;  Villers, Alexandre;  Poudre, Leo;  Varjonen, Rauno;  Korpimaki, Erkki
收藏  |  浏览/下载：7/0  |  提交时间：2019/04/09
body condition  climate change  diet shifts  Eurasian pygmy owl  foraging behaviour  habitat loss  intensive forestry practices