The biology of Trypanosoma phaleri n.sp. from bowfin, Amia calva L., in Canada and the United States

1990 ◽  
Vol 68 (9) ◽  
pp. 1956-1961 ◽  
Author(s):  
Simon R. M. Jones ◽  
Patrick T. K. Woo
Keyword(s):  
Carassius Auratus ◽  
Gasterosteus Aculeatus ◽  
Perca Flavescens ◽  
The United States ◽  
Salmo Gairdneri ◽  
Anguilla Rostrata ◽  
Catostomus Commersoni ◽  
Ictalurus Nebulosus ◽  
Amia Calva ◽  
A New Species

Between 1985 and 1989, 133 of 136 (98%) bowfin (Amia calva) collected from Lakes Ontario, Erie and Huron, Ontario, Canada, and from Sugg's Lake, Florida, U.S.A., were infected with a new species of trypanosome. Trypanosoma phaleri n.sp. was pleomorphic, developed to infective metatrypanosomes in the leech Desserobdella phalera, and was transmitted by D. phalera to laboratory-reared bowfin but not to Catostomus commersoni, Anguilla rostrata, Ictalurus nebulosus, Gasterosteus aculeatus, Salmo gairdneri, Perca flavescens, Stizostedion vitreum, or Carassius auratus. Trypanosoma phaleri n.sp. developed poorly in the leech Hemiclepsis marginata.

Diplostomum adamsi sp.n.: description, life cycle, and pathogenesis in the retina of Perca flavescens

1977 ◽  
Vol 55 (1) ◽  
pp. 64-73 ◽  
Author(s):  
R. J. G. Lester ◽  
H. W. Huizinga
Keyword(s):  
Gasterosteus Aculeatus ◽  
Pigment Epithelium ◽  
Perca Flavescens ◽  
Photoreceptor Cells ◽  
Salvelinus Namaycush ◽  
Anterior Testis ◽  
Peripheral Retina ◽  
Catostomus Commersoni ◽  
Semotilus Atromaculatus ◽  
Lymnaea Elodes

Forty-two perch eyes (Perca flavescens) infected with metacercariae of Diplostomum adamsi were fed to a herring gull (Larus argentatus). Eighty adults were recovered from the intestine 10 days later. They were characterized by their small size (1.5 to 2.1 mm), asymmetrical anterior testis, and the absence of vitellaria in forebody anterior to the middle of the ventral sucker.Eggs of D. adamsi passed by the gull embryonated in 22 days at 22 °C and hatched when exposed to light. Miracidia penetrated snails of the species Lymnaea elodes and L. stagnalis. Forty days later straight-tailed cercariae with six pairs of caudal bodies were released from both lymnaeids. They penetrated and developed in P. flavescens but not in Salvelinus namaycush, Catostomus commersoni, Semotilus atromaculatus, or Carassius auratus. In P. flavescens, metacercariae were found in clusters in the peripheral retina, in a cavity between the photoreceptor cells and the pigment epithelium. The photoreceptor cells were disorganized but not destroyed, unlike those in the eyes of Gasterosteus aculeatus parasitized by D. scudderi.

Pathology of five species of Gyrodactylus Nordmann, 1832 (Monogenea)

1984 ◽  
Vol 62 (6) ◽  
pp. 1084-1088 ◽  
Author(s):  
D. K. Cone ◽  
P. H. Odense
Keyword(s):  
Carassius Auratus ◽  
Poecilia Reticulata ◽  
Gasterosteus Aculeatus ◽  
Attachment Site ◽  
Skin Surface ◽  
Marginal Hook ◽  
The Body ◽  
Salmo Gairdneri ◽  
Tautogolabrus Adspersus ◽  
Skin Discoloration

Attachment-site pathology of the ectoparasites Gyrodactylus adspersi Cone and Wiles, 1983 on Tautogolabrus adspersus, Gyrodactylus avalonia Hanek and Threlfall, 1969 on Gasterosteus aculeatus, Gyrodactylus bullatarudis Turnbull, 1956 on Poecilia reticulata, Gyrodactylus sp. on Carassius auratus, and Gyrodactylus salmonis (Yin and Sproston, 1948) on Salmo gairdneri was examined using optical microscopy and scanning electron microscopy. In the first four species, the disc-shaped haptor attached itself to the host skin surface by means of blade tips of 16 peripherally located marginal hooks, with the two ventrally located hamulus blades compressing the underlying epithelium into a small depression. Tissue damage from attachment and feeding was minimal. However, G. salmonis lodged its marginal hook sickles deep into the host epidermis and appeared to cause extensive fin damage and skin discoloration. There was little evidence of bacterial involvement in the wounds, but bacterial microcolonies were observed on the body surface and haptor of G. salmonis. The latter results are discussed in relation to our understanding of gyrodactyliasis.

Morphology and host specificity of Cryptobia catostomi n.sp. (Protozoa: Kinetoplastida) from white sucker (Catostomus commersoni) in southern Ontario

1977 ◽  
Vol 55 (7) ◽  
pp. 1082-1092 ◽  
Author(s):  
Susan M. Bower ◽  
Patrick T. K. Woo
Keyword(s):  
Host Specificity ◽  
Carassius Auratus ◽  
Salmo Gairdneri ◽  
Body Measurements ◽  
White Sucker ◽  
Adult Fish ◽  
Catostomus Commersoni ◽  
Southern Ontario ◽  
Semotilus Atromaculatus ◽  
Rhinichthys Atratulus

During the summer of 1975, 285 white sucker from 10 localities in southern Ontario were examined for haemoflagellates. Cryptobia catostomi n.sp., found in the blood of 43.4% of the fish examined, occurred in all populations of adult fish and in one of three populations of juvenile fish.The morphology of C. catostomi n.sp. based on over 500 specimens stained with Giemsa's stain, varied considerably. Cloning showed that this species is pleomorphic and has morphological features and body measurements which encompass most other Cryptobia spp. previously described from the blood of fishes. Cryptobia catostomi n.sp. was distinguished by its host specificity. Infections could not be transmitted to 16 other species of fishes by inoculation of blood from infected sucker. Fishes refractive to infection included Cyprinus carpio, Carassius auratus, Rhinichthys atratulus, Semotilus atromaculatus, Salmo gairdneri, Oncorhynchus kisutch, and Esox lucius from which other species of Cryptobia (C. borreli, C. cataractae, C. salmositica, and C. gurneyorum) have been reported in North America.

scholarly journals First record of a nonpaleotropical intejocerid cephalopod from Darriwilian (Middle Ordovician) strata of central Spain

2019 ◽  
Vol 94 (2) ◽  
pp. 273-278
Author(s):  
Björn Kröger ◽  
Juan Carlos Gutiérrez-Marco
Keyword(s):  
United States ◽  
New Species ◽  
New Genus ◽  
First Record ◽  
The United States ◽  
Central Spain ◽  
Middle Ordovician ◽  
A New Species

AbstractThe order Intejocerida is an enigmatic, short-lived cephalopod taxon known previously only from Early–Middle Ordovician beds of Siberia and the United States. Here we report a new genus, Cabaneroceras, and a new species, C. aznari, from Middle Ordovician strata of central Spain. This finding widens the paleogeographic range of the order toward high-paleolatitudinal areas of peri-Gondwana. A curved conch, characteristic for the new genus, was previously unknown from members of the Intejocerida.UUID: http://zoobank.org/21f0a09c-5265-4d29-824b-6b105d36b791

Survival to hatching of fishes in sulfate-saline waters, Devils Lake, North Dakota

1995 ◽  
Vol 52 (3) ◽  
pp. 464-469 ◽  
Author(s):  
Todd M. Koel ◽  
John J. Peterka
Keyword(s):  
North Dakota ◽  
Sodium Sulfate ◽  
Yellow Perch ◽  
Hatching Success ◽  
Perca Flavescens ◽  
White Sucker ◽  
Catostomus Commersoni ◽  
Devils Lake ◽  
Common Carp Cyprinus Carpio ◽  
Species Survival

Laboratory-based bioassays were conducted to determine concentrations of sodium-sulfate type salinities that limit the hatching success of several fish species. Survival to hatching (SH) was significantly lower (P < 0.05) in sodium-sulfate type waters from Devils Lake, North Dakota, of ≥ 2400 mg/L total dissolved solids (TDS) than in fresh water of 200 mg/L. In waters of 200, 1150, 2400, 4250, and 6350 mg/L TDS, walleye (Stizostedion vitreum) SH was 41, 38, 7, 1, and 0%; northern pike (Esox lucius) SH was 92, 68, 33, 2, and 0%; yellow perch (Perca flavescens) SH was 88, 70, 73, 0, and 0%; white sucker (Catostomus commersoni) SH was 87, 95, 66, 0, and 0%; common carp (Cyprinus carpio) SH was 71, 69, 49, 63, and 25%.

Parasites of Freshwater and Anadromous Fishes from Matamek River System, Quebec

1974 ◽  
Vol 31 (6) ◽  
pp. 1135-1139 ◽  
Author(s):  
George Hanek ◽  
Kalman Molnar
Keyword(s):  
Salmo Salar ◽  
Gasterosteus Aculeatus ◽  
Salvelinus Fontinalis ◽  
River System ◽  
Anguilla Rostrata ◽  
Osmerus Mordax ◽  
Pungitius Pungitius ◽  
Apeltes Quadracus ◽  
Catostomus Catostomus

In 224 fish of nine species from Matamek River system 38 genera of parasites were recovered (12 Protozoa, 3 Monogenea, 6 Digenea, 6 Cestoda, 6 Nematoda, 2 Acanthocephala, 3 Copepoda). Six genera of parasites were noted in Salmo salar, Salvelinus fontinalis harbored 17 genera, S. alpinus 5 genera, Osmerus mordax 4 genera, Anguilla rostrata 9 genera, Catostomus catostomus 8 genera, Apeltes quadracus 1 genus, Gasterosteus aculeatus 12 genera, and Pungitius pungitius 9 genera.

Aggression of guarding male smallmouth bass (Micropterus dolomieui) towards potential brood predators near the nest

1993 ◽  
Vol 71 (2) ◽  
pp. 437-440 ◽  
Author(s):  
R. J. Ongarato ◽  
E. J. Snucins
Keyword(s):  
Aggressive Behaviour ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Smallmouth Bass ◽  
Brown Bullhead ◽  
Ictalurus Nebulosus ◽  
Defence Behaviour ◽  
Micropterus Dolomieui ◽  
Brood Guarding

Models of potential brood predators placed near the nest were used to elicit defence behaviour in male smallmouth bass (Micropterus dolomieui) in the field. The three predator models represented a conspecific, a species found in the lake (yellow perch, Perca flavescens), and a species not present in the lake (brown bullhead, Ictalurus nebulosus). Aggressive behaviour increased with brood age and with decreasing distance between model and nest. Brood-guarding smallmouth bass exhibited a generalized response to the three predator models and did not discriminate between them by altering levels of aggression.

A new species of Aculops (Acari: Prostigmata: Eriophyidae) from Serbia on Dipsacus laciniatus L. (Dipsacaceae), a weed target of classical biological control in the United States of America

Zootaxa ◽  
2012 ◽  
Vol 3192 (1) ◽  
pp. 59 ◽  
Author(s):  
BRIAN RECTOR ◽  
RADMILA U. PETANOVIĆ
Keyword(s):  
Biological Control ◽  
United States Of America ◽  
Control Program ◽  
Classical Biological Control ◽  
The United States ◽  
Morphological Characters ◽  
Mite Species ◽  
The Family ◽  
Eriophyoid Mite ◽  
A New Species

A new eriophyoid mite species, Aculops orlovacae n. sp. (Acari: Prostigmata: Eriophyidae) collected from Dipsacus laciniatus L. (Dipsacaceae) in northern Serbia, is described and illustrated, including digital micrographs depicting key morphological characters. Differential diagnosis is provided in comparison with Aculops salixis Xue, Song et Hong, Aculops rhodensis (Keifer), Aculops hussongi Keifer and Aculops oblongus (Nalepa). This is the first eriophyoid mite species in the genus Aculops described from a host plant in the family Dipsacaceae and it is only the second eriophyoid known from a host species in the genus Dipsacus L. This mite was found during surveys for natural enemies of Dipsacus spp., as part of a classical biological control program.

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