What's the difference between anadromous and steelhead?
Anadromous
Definition:
(a.) Ascending rivers from the sea, at certain seasons, for breeding, as the salmon, shad, etc.
(a.) Tending upwards; -- said of terns in which the lowest secondary segments are on the upper side of the branch of the central stem.
Example Sentences:
(1) Mortality of pelyad (Coregonus peled) caused by Tetraonchus alaskensis took place in winter 1973 in the Voikara and Syn rivers (the Ural tributaries of the Lower Ob) during anadromous and catadromous migrations.
(2) The latter undergo marked hypertrophy and active state just at the time of entering the river (February), while no detectable change was seen in the former throughout anadromous migration.
(3) The latter attained their maximal size in the earliest time of anadromous migration.
(4) The aim was to find simple and sensitive test parameters and to simulate exposure situations typical for anadromous fish species (salmonids), which generally cross heavily polluted coastal areas or estuaries before they reach uncontaminated upstream spawning areas.
(5) This work is part of a continuing series of studies on the connective tissues in the anadromous sea lamprey.
(6) It was shown that during anadromous migration before spawing, the level of corticosteroids in the blood increases, the increases beginning already during the sea period.
(7) Since the latter finding was questionable because of short immunization times, and data from more than a single fish species were desirable, both the cunner and an anadromous fish, the striped bass (Morone saxatilis), were examined for antibody responses against the bacterium Bacillus cereus in Freund's complete adjuvant during a 6- to 8-wk time period.
(8) To explore the evolutionary nature of the salmonid mitochondrial DNA (mtDNA) control region (D-loop) and its utility for inferring phylogenies, the entire region was sequenced from all eight species of anadromous Pacific salmon, genus Oncorhynchus; the Atlantic salmon, Salmo salar; and the Arctic grayling, Thymallus arcticus.
(9) Four types of acidophilic granular cells, in addition to B-cells, are identified in the islet organ of anadromous specimens of two subspecies of Petromyzon marinus by light and electron microscopy.
(10) The flagellar olfactory receptors appeared to predominate in both ten-days larvae and adults of the anadromous sturgeons and sevrugas, while the microvillar olfactory receptors predominate in freshwater sterlets in ten-days larvae as well in adults.
(11) The parr-smolt transformation (smoltification) of juvenile anadromous salmonids involves a morphological, physiological and behavioural metamorphosis of the fish from a freshwater-adapted form to a salt-water-adapted form.
(12) We used single-family crosses to confirm the Mendelian interpretation of allozyme variation and to examine linkage relationships at five polymorphic loci in freshwater and anadromous threespine sticklebacks (Gasterosteus aculeatus) from the Little Campbell River, British Columbia.
(13) We observed significant quantitative and qualitative changes of the neurons both in the parvo- and magnocellular preoptic nucleus and in the lateral tuberal nucleus during anadromous migration and during spawning and fertilization.
(14) The effect of injections of arginine vasotocin (AVT) on plasma free fatty acid (FFA) levels was studied in anadromous sea lampreys collected in the St. John River, New Brunswick, during their upstream spawning migration.
(15) The different ratios of these cells in the olfactory organs of anadromous and fresh-water Acipenseridae may be a result of their ecological adaptations.
(16) The ultrastructural changes that take place in the ventral dermis along with the development of iridophores were examined in the anadromous sea lamprey, Petromyzon marinus, during metamorphosis.
(17) The thyroid glands of coho salmon collected at different stages of their anadromous migration exhibited progressive and extensive hyperplasia and hypertrophy.
(18) It is postulated that reduced adult male hypoosmoregulatory ability explains skewed sex ratios in anadromous brook trout populations and may limit the extent of brook trout anadromy.
(19) Thyroglobulin (TG) was localized in the endostyle of the anadromous sea lamprey, Petromyzon marinus L. by means of the unlabeled antibody peroxidase-antiperoxidase immunocytochemical method.
(20) The occurrence of female-specific serum protein (FSSP) was examined in the anadromous lamprey, Lampetra japonica, and a freshwater lamprey, Lampetra reissneri, by an immunodiffusion technique using antiserum raised against the serum of sexually mature female lamprey.
Steelhead
Definition:
(n.) A North Pacific salmon (Salmo Gairdneri) found from Northern California to Siberia; -- called also hardhead, and preesil.
(n.) The ruddy duck.
Example Sentences:
(1) The sea-run steelhead trout response was similar to the nonmigratory rainbow; although, the pre-migratory transformation (smoltification) had no effect on enzyme activity.
(2) 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).
(3) Fishing for chinook and coho salmon, steelhead and rainbow trout is legendary on the Rogue and a number of dams have been dynamited in recent years to restore fish migration pathways.
(4) Time-related observations of myointimal hyperplasia in precocious male steelhead trout maintained in the laboratory suggest that regression of arterial lesions occurs.
(5) Evidence is provided for the presence of retinopetal cells in the tectum of steelhead trout.
(6) Coronary arteries were examined for significant changes in myointimal hyperplasia in one-year old juvenile steelhead or rainbow trout treated with estradiol, testosterone or human chorionic gonadotropin (HCG).
(7) Metacercariae 60 to 100 days old were fed to young steelhead trout, Salmo gairdneri, and partially developed specimens of P. shawi were recovered 26 days later.
(8) The relationship between alkaline phosphatase and environmental salinity was examined in the rainbow trout and the migratory rainbow (steelhead), Salmo gairdneri.
(9) Therefore, we refute the idea of natural lesion regression in steelhead trout.
(10) Renibacterium salmoninarum was not detected in either coho salmon or steelhead trout by immunodiffusion analysis.
(11) Lenses were obtained from the eyes of four different classes of Chordates, including Mammalia (rat, mouse, cow, human), Aves (chicken), Amphibia (tiger salamander), and Osteichthyes (steelhead), as well as from one Mollusca (squid).
(12) Eyed embryos of the steelhead trout (Salmo gairdneri) were significantly more resistant to zinc and lead but significantly less resistant to mercury, copper and silver if the zona radiata (egg capsule) was removed than if it was intact.
(13) Kidney and spleen homogenates from each of 60 coho salmon (Oncorhynchus kisutch) and steelhead trout (Salmo gairdneri) were examined for detection of Renibacterium salmoninarum.
(14) Although no statistical correlations could be derived it is suggested that in steelhead trout, changes in myointimal hyperplasia lesion severity are associated with changing reproductive patterns.
(15) Nevertheless, when steelhead trout (Oncorhynchus mykiss) return to the ocean after spawning, an unusual phenomenon has been reported, namely, that these lesions have regressed naturally and almost completely (R.L.
(16) Coronary hyperplastic nodules resembled morphologically those observed previously in sexually mature steelhead and rainbow trout.
(17) Neutralizing antibodies specific for infectious hematopoietic necrosis virus (IHNV) were isolated from eggs of spawning Steelhead trout (Salmo gairdneri), using sodium sulfate precipitation.
(18) The steelhead continued to exhibit parasites in the kidney interstitium and epithelium and lumens of the tubules.
(19) Fatty acids from the several lipid classes of selected steelhead trout (Salmo gairdnerii) parr and smolt tissues, previously separated by thin-layer chromatography, were analyzed by gas-liquid chromatography.
(20) Last March, in Washington state in the US, a landslide wiped out the settlement of Steelhead Haven , crushing 43 people to death.