(n.) A genus of fishes, including the fresh-water perch.
Example Sentences:
(1) A sensitive radioimmunoassay (RIA) for the measurement of metallothionein (MT) from perch (Perca fluviatilis) has been developed.
(2) A new species, Apiosoma lotae, and subspecies, Apiosoma piscicola percae, are described.
(3) The separation of two isoforms of rainbow trout (Salmo gairdneri) metallothionein was possible by DEAE-Sephadex A-25 chromatography, while only one form of perch (Perca fluviatilis) metallothionein was obtained with this method.
(4) Cells of the gas gland of the perch Perca fluviatilis L., stimulated to increased generation of gas by the repeated emptying of the swim-bladder, were examined in the electron microscope.
(5) The total lipid content in the muscle of perch (Perca fluviatilis) and vendace (Coregonus albula) was less than 50% of that in rainbow trout and a seasonal variation was clear only in vendace.
(6) Encysted metacercariae of Clinostomum marginatum (Digenea) were obtained from tissues of yellow perch, Perca flavescens.
(7) 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).
(8) An ultrastructural study of the intestinal absorptive epithelium in perch (Perca fluviatilis) has shown that the perch intestine can be divided into three segments: the proximal segment, the middle segment and the distal segment.
(9) A comparative analysis of the character of interactions in five parasitic systems myxosporidians--fishes (Myxobolus mülleri-Perca fluviatilis, Myxobolus ellipsoides-Phoxinus percnurus, Henneguya zschokkei-Coregonus autumnalis migratoris, Henneguya cerebralis-Thymalus articus nigrescens, Sphaerospora pectinacea-Perca fluviatilis) is given.
(10) The argentaffine stroma of the liver of some fishes (Perca fluviatilis, Exos lucius, Paracottus kessleri, Coregonus autumnalis migratorius, Thymallus arcticus) is described.
(11) Salmonidae), the yellow perch Perca flavescens and the walleye Stizostedion vitreum (fam.
(12) Overlapping of generations was evident in P. percae in the sea perch, although only by virtue of the lack of mature worms at the end of the summer.
(13) The effect of the accidental oil spill (250 tons) in a boreal archipelago (Gulf of Bothnia, Vaasa, Finland) on xenobiotic metabolism of local perch (Perca fluviatilis) was monitored for 1.5 years.
(14) the yellow perch (Perca flavescens), the walleye (Stizostedion vitreum) and the sauger (S. canadense), were studied in situ using a microspectrophotometer-computer complex.
(15) Proteocephalus infection in the perch and ruff did not vary significantly according to the length of the fish in either area, except that no P. percae were found in perch smaller than 70 mm in the lake.
(16) Out of six fish species examined (Esox lucius, Paracottus kessleri, Perca fluviatilis, Leuciscus leuciscus baicalensis, Coregonus autumnalis migratorius, Thymallus arcticus baicalensis) labrocyte-like cells were detected in Esox lucius, Leuciscus leuciscus baicalensis, Coregonus autumnalis migratotius.
(17) The species of parasites acquired most rapidly were those that were non-host-specific and common to the indigenous populations of both walleye and yellow perch (Perca flavescens).
(18) Female gonads of the perch (Perca fluviatilis) in various stages of development are tested for hemagglutinin activity against human erythrocytes.
(19) After the first year the mercury content of perch (Perca fluviatilis) muscle had also decreased.
(20) The cortisol stress response to capture was investigated in two species of fish (Perca flavescens and Esox lucius) from sites polluted by high levels of polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and mercury, and from reference sites in the St. Lawrence river system.
Percoid
Definition:
(a.) Belonging to, or resembling, the perches, or family Percidae.
(n.) Any fish of the genus Perca, or allied genera of the family Percidae.
Example Sentences:
(1) Histomorphological responses of the ovary of a freshwater percoid fish, Colisa (T.) fasciatus, to endosulfan or thiodan EC 35 treatment, a popular pesticide, have been described.
(2) Chromatin of 14 species of fish referring to nine families of the percoid fish superorder includes protamines similar to salmin, a typical protamine of salmon.
(3) Evidence is presented in this work for the existence of a special chromaffin tissue in the ovary of the percoid teleost fish, Nandus and its hypertrophy under the influence of the pituitary extracts.