Estrogen knocks out fish in whole-lake experiment

TPC1 Knockout Knocks Out TPC1.

Robert Hooper, Dev Churamani, Sean M. Davidson, Yaping Lin-Moshier, Timothy F. Walseth, Sandip Patel, Jonathan S. Marchant Department of Cell and Developmental Biology, University College London, London, United Kingdom; Department of Medicine, Hatter Cardiovascular Institute, University College London, London, United Kingdom; Department of Pharmacology, University of Minnesota Medical School, M...

fish parasites in zarivar lake

twenty four ecto- and endo- parasite species were found in different organs of eight na-tive and exotic fish species in zarivar lake situated in the far west of iran. overall, 1000 fish specimens belonging to the dactylogyridae, gyrodactylidae families the cyprinidae, poeciliidae and mastacembelidae families were examined during 2001 and 2002. of them, five protozoans, including trichodina pedi...

Culling prey promotes predator recovery--alternative states in a whole-lake experiment.

Many top-predator fish stocks in both freshwater and marine systems have collapsed as a result of overharvesting. Consequently, some of these communities have shifted into seemingly irreversible new states. We showed, for predators feeding on prey that exhibit food-dependent growth, that culling of fish prey may promote predator recovery. We removed old stunted individuals of a prey-fish specie...

Pseudo-diel vertical migration in zooplankton: a whole-lake ¹⁵N tracer experiment

Pseudo-diel vertical migration in zooplankton: a whole-lake N tracer experiment

Diel vertical migration (DVM) of zooplankton is commonly considered an adaptation for feeding in food-rich and warm surface waters at night and avoiding visual predators during the day. However, the critical assessment of migration patterns frequently suggests that: (i) zooplankton may leave deeper waters with rich, deepchlorophyll layers and move into the epilimnion where food resources are lo...