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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：6/0  |  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.


  
ROOTS OF MENTAL ILLNESS 期刊论文
NATURE, 2020, 581 (7806) : 19-21
作者:  Sohn, Emily
收藏  |  浏览/下载：8/0  |  提交时间：2020/07/03

Psychiatrists have a dizzying array of diagnoses and not enough treatments. Hunting for the hidden biology underlying mental disorders could help.


Psychiatrists have a dizzying array of diagnoses and not enough treatments. Hunting for the hidden biology underlying mental disorders could help.


  
Voices from the village on trophy hunting in Hwange district, Zimbabwe 期刊论文
ECOLOGICAL ECONOMICS, 2019, 159: 335-343
作者:  Dube, Nqobizitha
收藏  |  浏览/下载：1/0  |  提交时间：2019/11/26
Trophy Hunting  Markets for Ecosystem Services  CAMPFIRE  Zimbabwe  
Carbon Costs and Bushmeat Benefits of Hunting in Tropical Forests 期刊论文
ECOLOGICAL ECONOMICS, 2018, 152: 22-26
作者:  Brodie, Jedediah F.
收藏  |  浏览/下载：9/0  |  提交时间：2019/04/09
Carbon cycle  Climate change  Defaunation  Overexploitation  REDD  Subsistence hunting  Wild meat  
Indigenous impacts on North American Great Plains fire regimes of the past millennium 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (32) : 8143-8148
作者:  Roos, Christopher I.;  Zedeno, Maria Nieves;  Hollenback, Kacy L.;  Erlick, Mary M. H.
收藏  |  浏览/下载：4/0  |  提交时间：2019/11/27
anthropogenic burning  bison hunting  pyric herbivory  climate-fire relationships  hunter gatherers  
Non-traditional data and innovative methods for autumn climate change ecology 期刊论文
CLIMATE RESEARCH, 2018, 75 (3) : 215-220
作者:  Buntgen, Ulf;  Krusic, Paul J.
收藏  |  浏览/下载：6/0  |  提交时间：2019/04/09
Animal migration  Citizen science  Cross-disciplinary assessment  Global change ecology  Hunting inventories  Mushroom fruiting  Tree-ring formation  
African wildlife conservation and the evolution of hunting institutions 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2017, 12 (11)
作者:  &;  39;t Sas-Rolfes, Michael
收藏  |  浏览/下载：9/0  |  提交时间：2019/04/09
institutions  wildlife conservation  economics  hunting  Africa  rhinoceros  lion