| the effects of bt corn on rusty crayfish (orconectes rusticus) growth and survival. | bt crops are one of the most commonly used genetically modified crops worldwide. bt crops contain a gene that is derived from the bacteria bacillus thuringiensis, which produces the cry1ab toxin. bt corn that contains the cry1ab toxin is used throughout the midwest united states to control crop pests such as the european corn borer (ostrinia nubilalis). headwater streams in regions known for intensive agriculture receive bt corn detritus after the fall harvest, which is then consumed by a divers ... | 2014 | 25001246 |
| interactions among invaders: community and ecosystem effects of multiple invasive species in an experimental aquatic system. | with ecosystems increasingly supporting multiple invasive species, interactions among invaders could magnify or ameliorate the undesired consequences for native communities and ecosystems. we evaluated the individual and combined effects of rusty crayfish (orconectes rusticus) and chinese mystery snails [bellamya (=cipangopaludina) chinensis] on native snail communities (physa, helisoma and lymnaea sp.) and ecosystem attributes (algal chlorophyll a and nutrient concentrations). both invaders are ... | 2009 | 18941789 |
| amines and motivated behaviors: a simpler systems approach to complex behavioral phenomena. | recent investigations in invertebrate neurobiology have opened up new lines of research into the basic roles of behavioral, neurochemical, and physiological effects in complex behavioral phenomena, such as aggression and drug-sensitive reward. this review summarizes a body of quantitative work, which identifies biogenic amines as a pharmacological substrate for motivated behaviors in the crayfish, orconectes rusticus. specifically, this paper details progress that has (1) explored links between ... | 2005 | 15685443 |
| complex predator-prey interactions and predator intimidation among crayfish, piscivorous fish, and small benthic fish. | predator-prey interactions were studied among a small prey fish (the johnny darter etheostoma nigrum) and two predators (crayfish orconectes rusticus and smallmouth bass micropterus dolomieui) with complementary foraging behaviors. when only smallmouth bass were present, darters reduced activity to 6% of control rates and spent most of the time hiding under tile shelters. when only crayfish were present, darter activity and shelter-use were similar to controls. when both crayfish and bass were p ... | 1988 | 28311839 |