(n.) A projecting piece of timber or iron near the bow of vessel, to which the anchor is hoisted and secured.
Example Sentences:
Fathead
Definition:
(n.) A cyprinoid fish of the Mississippi valley (Pimephales promelas); -- called also black-headed minnow.
(n.) A labroid food fish of California; the redfish.
Example Sentences:
(1) The toxicity of natural pyrethrins and five pyrethroids was determined with coho salmon (Oncorhynchus kisutch), steelhead trout (Salmo gairdneri), fathead minnow (Pimephales promelas), channel catfish (Icatlurus punctatus), bluegill (Lepomis macrochirus), and yellow perch (Perca flavescens).
(2) The viral susceptibility range of a poikilothermic cell line derived from the fathead minnow (Pimephales promelas) (FHM) to infection by a number of homoiothermic viruses representing most of the presently recognized viral groups and a member of the psittacosis-lymphogranuloma-trachoma group of agents was studied.
(3) However, there was a better correlation between the in vitro cytotoxicity data for the BF-2 cell culture and LC50 data for bluegill sunfish than between similar data for the FHM cell line and fathead minnows.
(4) Following administration by gavage [75Se]selenate and [75Se]selenite were absorbed from the gastrointestinal tract of fathead minnows (Pimephales promelas) at 94 and 80% efficiency, respectively.
(5) Using behavioral parameters monitored in the fathead minnow during acute toxicity testing, FATS associated with acetylcholinesterase (AChE) inhibitors and narcotics could be reliably predicted.
(6) The ovarian histology of fathead minnows (Pimephales promelas) chronically exposed to three levels of environmental pH was examined for evidence of reproductive impairment.
(7) The suitability of the fathead minnow (FHM) epithelial cell line for use as the target (indicator) system in in vitro cytotoxicity assays was evaluated using several endpoints.
(8) Concurrent predation by rainbow trout on fathead minnows (Pimephales promelas), five-spined sticklebacks (Culaea inconstans), and nine-spined sticklebacks (Pungitius pungitius), concentrated the parasites.
(9) Reasons for the disparity between selenium-induced reproductive impairment observed in other species and apparent lack of impairment in fathead minnows may involve reduced bioaccumulation of selenium by minnows due to differences in gut morphology and physiology.
(10) This study evaluates the quantitative structure-activity relationships from measured log Kow's and log LC50's for Pimephales promelas (fathead minnow) and Carassius auratus (goldfish).
(11) Hepatic neoplasms developed in the Japanese medaka, guppy, sheepshead minnow, Gulf killifish, inland silverside, rivulus, and fathead minnow.
(12) Brief exposure chronic test results indicated that fathead minnow exposure to chlorpyrifos for as few as 5 hr at a concentration similar to a continuous exposure 96-hr LC50 value resulted in increased deformities and a reduction in growth, whereas a 48-hr exposure at a concentration similar to a continuous exposure 96-hr LC50 value was required to cause a reduction in growth for endrin and a reduction in survival and growth for fenvalerate.
(13) DNA fiber autoradiography was performed on cells of the fathead minnow cultured at 14 and 34 degrees C. Replicon growth rates were found to be about twice as fast at the higher temperature, but there was no appreciable difference in the number of replicons.
(14) This study investigated the relationships between the toxicities of common organic pollutants to the fathead minnow (Pimephales promelas), to Daphnia magna, to Tetrahymena pyriformis and in the Microtox test, which uses the luminescent bacterium Photobacterium phosphoreum.
(15) Brain AChE from rats, mice, fathead minnows, or rainbow trout was preincubated with an IC90 concentration of either paraoxon or malaoxon.
(16) Viruses isolated from fish with viral haemorrhagic septicaemia (VHS), infectious haematopoietic necrosis (IHN), spring viraemia of carp (SVC), swim-bladder inflammation (SBI) and pike fry disease (PFD) have been grown to high titre in fathead minnow cells.
(17) Using a conventional "resaturation" method whereby aquarium water was continuously passed through a column containing sand or fine glass beads coated with cyclic and linear permethylsiloxanes, their uptake levels by rainbow trout and fathead minnows have been compared.
(18) The model describes the combined effects of dose-level exposure and time-duration exposure using 570 96-hr toxicity tests with fathead minnows.
(19) Fathead minnow larvae (Pimephales promelas) were exposed to three individual pesticides during brief or continuous exposure in 96-hr and 28- to 30-day toxicity tests.
(20) were found in the atrium of the heart of fathead minnows (Pimephales promelas) and five- and nine-spined sticklebacks (Culaea inconstans and Pungitius pungitius).