(a.) A large wild duck (Anas boschas) inhabiting both America and Europe. The domestic duck has descended from this species. Called also greenhead.
Example Sentences:
(1) Adult mallard ducks fed 0, 2, 20, or 200 ppm of cadmium chloride in the diet were sacrificed at 30-day intervals and tissues were analyzed for cadmium.
(2) One method consisted of examination of gizzards from mallards shot by hunters (n = 2,859) and the other method consisted of examination of gizzards from mallards caught in duck traps (n = 865).
(3) Generally metal levels were higher in the salt gland for mallard and black duck, and in the liver for greater scaup.
(4) Neonatal ducklings and chickens were tested for responsiveness to a pulsing pure tone that was as similar as possible to the mallard maternal alarm call.
(5) Twenty-four-hour-old mallard ducklings (Anas platyrhynchos) exhibit a high degree of behavioral freezing (i.e., vocal and locomotor inhibition) upon hearing the maternal alarm call, which the hen utters when potential predators are near the nest.
(6) By the end of August, shorter chain wax esters composed of C6 and C12 acids became the dominant components of the secretion and this composition, previously considered characteristic of mallards, remained constant until March.
(7) Artificially incubated mallard eggs were treated externally with 5 microliter of No.
(8) Mallard drakes accumulated mercury rapidly from dietary dosage of methylmercury dicyandiamide and eliminated it slowly, retaining approximately one half at the end of 84 days; no measurable loss occurred between the end of the 7th and 56th days, but loss resumed concurrently with new feather growth, and continued through the 112th day, the close of the study.
(9) Growth characteristics of the mallards on the other hand, did not differ between the sexes.
(10) The prevalence of influenza varied greatly among the common waterfowl species: mallards 42%, black ducks 30%, blue-winged teal 11%, wood ducks 2%, and Canada geese 0%.
(11) Mallard eggs collected in the wild have been found to contain levels of mercury exceeding the 1 ppm (wet-weight) found in the eggs of hens fed a diet containing 0.5 ppm, but there are no reports of mallard eggs collected in the wild that were found to contain as much mercury (6 to 9 ppm) as eggs from hens fed a diet containing 3 ppm mercury.
(12) In posthatching mallard ducks (Anas platyrhynchos), brain cooling improves with growth.
(13) The 1-24 ACTH-induced increases in B and Aldo synthesis by the mallard and Pekin duck cells exposed to the same range of concentrations were up to 40 and 60 times greater than the corresponding responses of the chicken cells.
(14) The rat mammary gland thioesterase II exhibits approximately 40% homology with a thioesterase from mallard uropygial gland, the sequence of which was recently determined by cDNA analysis [Poulose, A.J., Rogers, L., Cheesbrough, T. M., & Kolattukudy, P. E. (1985) J. Biol.
(15) Differences in the organization of the systems in pigeon and mallard are related to the differing degrees of visual and tactile (trigeminal) contributions to feeding in the two birds.
(16) Two of these, cutinase, a typical serine esterase from the fungus Fusarium solani pisi, and thioesterase B from the uropygial gland of the mallard duck Anus platyrhynchus, hydrolyzed diethylpyrocarbonate so rapidly that histidine modification could not be detected except when the enzymic activity was inhibited by diisopropylfluorophosphate treatment or by the presence of critical micellar concentrations of sodium dodecyl sulphate.
(17) Localization studies of the hypothalamohypophysial and tuberoinfundibular neurosecretory systems were performed in the adult male mallard duck with an immunoperoxidase techinque for the demonstration of neurophysin (NP) and gonado-tropin-releasing hormone (Gn-RH) and with aldehyde fuchsin for the staining of neuosecretory material (NSM).
(18) Plasma free fatty acid (FFA) levels were measured in the mallard duck (Anas platyrhynchos) following hypothalamic lesions at various sites.
(19) Mallards and black ducks from the Atlantic Flyway and mallards from the Pacific Flyway contained significantly lower DDE residues than in 1969-70.
(20) This was followed by two regions encoding ORF1 and ORF2 which were similar to each other (48% nucleotide identity, 31% amino acid identity), as well as to GrsT, a protein encoded by a gene located adjacent to gramicidin S synthetase in Bacillus brevis, and to vertebrate (mallard duck and rat) thioesterases.
Orca
Definition:
Example Sentences:
(1) Japan should undertake some DNA research in Japanese fish markets, where endangered whales - including orcas and humpbacks - are being sold as minke whales.
(2) Last month, toymaker Mattel announced that it would no longer produce a SeaWorld version of its Barbie doll, which came dressed as a SeaWorld orca trainer.
(3) Its breeding programme is probably doomed by a combination of regulation (Californian authorities last year refused redevelopment plans for its San Diego site unless it stopped breeding orcas) and the fact that its virile male, Tilikum, appears to be dying .
(4) Partly out of recognition of Tilikum's huge size – at 12 tonnes he is the largest orca in captivity – and partly out of knowledge of the past, the park's 28 trainers were never allowed to swim with him.
(5) Would people bring their children to SeaWorld if they knew the cruelty behind the orca whale circus show?
(6) SeaWorld has long known this but accepts that abnormal (even desperate) orca behavior ... is the price paid for this form of human entertainment and company profit,” the court documents say.
(7) It asks whether a large corporation that makes money from the orca whales in its amusement parks has covered up dangers to the trainers and to the whales.
(8) The documentary implies that the orcas are driven to psychosis – and attacking humans – by the cruelties and indignities of their imprisonment.
(9) It is the second time SeaWorld has been sued in less than three weeks, after a similar class action lawsuit was filed in California last month alleging the company is misleading the public by claiming its captive killer whales, or orcas, are happy and thriving.
(10) It had previously issued a steady stream of lower-key newspaper ads, trying to push back aggressively against the message presented by Blackfish and the pall that was cast over the company when, in late 2009 and early 2010, trainer Alexis Martineau was killed by a SeaWorld-owned orca on loan to a Spanish theme park, and another trainer, Dawn Brancheau, was killed by a giant male orca during a show at SeaWorld in Orlando.
(11) But none of the conditions that led to these tragedies have truly changed for him, for the trainers, or for other orcas.
(12) The completeness of the amino acids composition of Orca meat proteins enables it to utilize this raw material for obtaining valuable food products in the form of concentrates or hydrolysates.
(13) Its five-day Orcas and Northern Lights break, staying in Grundarfjordur , costs from £1,148pp, with flights and full-board.
(14) They are also beautiful, rugged and rainforested, with views to the Rockies, and bays where you can often see orcas and humpback whales.
(15) The story she unravelled about Tilikum, a male orca at SeaWorld that was involved in the deaths of three people, turned her into an inadvertent activist.
(16) • Park website , Sacajawea Interpretive Center San Juan Islands national monument Facebook Twitter Pinterest An orca in San Juan Islands.
(17) They include excoriating cinematic treatments of Indonesian death squads, evangelical homophobia in Uganda, the uprising in Tahrir Square and an attack on the incarceration of orca whales in marine parks.
(18) SeaWorld lawsuit alleges orcas are drugged and confined in 'chemical tubs' Read more The environmental advocacy and research group Earth Island Institute, based in Berkeley, California, is advising the legal team representing the plaintiffs.
(19) At multiple points, the trainers attest to the orcas’ advanced emotional and mental characteristics, yet see no problem with locking that intelligence up for mere circus spectacle.
(20) The proteins of the Orca meat contain all the amino acids, including essential ones.