The protozoan parasites of fish from two lakes in Algonquin Park, Ontario

1985 ◽  
Vol 63 (8) ◽  
pp. 1846-1858 ◽  
Author(s):  
Lianxiang Li ◽  
Sherwin S. Desser
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
Salvelinus Fontinalis ◽  
Perca Flavescens ◽  
Global Distribution ◽  
Lepomis Gibbosus ◽  
Relative Distribution ◽  
Protozoan Parasites ◽  
Parasitic Protozoa ◽  
Semotilus Atromaculatus

The parasitic Protozoa of seven species of freshwater fish (the cyprinids Notropis cornutus, Notropis heterolepis, Notemigonus crysoleucas, and Semotilus atromaculatus; the percid Perca flavescens; the centrarchid Lepomis gibbosus; and the salmonid Salvelinus fontinalis) are described from Lake Sasajewun and Lake Opeongo, Algonquin Park, Ontario. The parasites include 1 species of Hexamita, 6 species of Goussia, 2 species of Eimeria, 3 species of Octosporella, 30 species of Myxosporea, and 9 species of Ciliata. Fifteen new species are described: Goussia notropicum, Goussia notemigonica, Sphaerospora diminuta, Myxobolus heterolepis, Myxobolus lepomicus, Myxobolus paralintoni, Myxobolus gibbosus, Myxobolus wellerae, Myxobolus schuberti, Myxobolus pseudokoi, Myxobolus pellicdes, Thelohanellus oviformis, Myxobilatus semotilii, Trichodina opeongoensis, and Apiosoma triangularis. The relative distribution of the parasites and their prevalence in fish from the two lakes, and the global distribution of protozoan parasites of fish are discussed.

Some little-known and new protozoan parasites of fish from Lake Sasajewun, Algonquin Park, Ontario

1989 ◽  
Vol 67 (6) ◽  
pp. 1372-1379 ◽  
Author(s):  
Jiří Lom ◽  
Sherwin S. Desser ◽  
Iva Dyková
Keyword(s):  
Tissue Specificity ◽  
Polar Filament ◽  
Lepomis Gibbosus ◽  
Renal Tubules ◽  
Protozoan Parasites ◽  
Sporocyst Residuum ◽  
Semotilus Atromaculatus ◽  
Ictalurus Nebulosus ◽  
The Common ◽  
Creek Chub

One hundred and twenty-six fish of eight species, taken from Lake Sasajewun, Ontario, were examined for protozoan parasites. Detailed descriptions are given for Sphaerospora diminuta Li and Desser from the pumpkinseed, Lepomis gibbosus, and for Goussia degiustii Molnar and Fernando from the common shiner, Notropis cornutus. Oocysts of G. degiustii are pleomorphic and exhibit low tissue specificity. Goussia freemani Molnar and Fernando from the kidney of N. cornutus is tentatively synonymized with Goussia leucisci Shulman and Zaika. Two new species of Sphaerospora are described: Sphaerospora paulini n.sp. from the renal tubules of creek chub, Semotilus atromaculatus, with spherical spores 8.1 (8.0–8.5) μm in diameter, containing ovoid polar capsules 2.8 (2.5–3.4) × 2.6 (2.5–3.0) μm, and polar filament with 4–5 coils; and Sphaerospora hankai n.sp. from the renal tubules of the brown bullhead, Ictalurus nebulosus, with subspherical spores 6.1 (5.4–6.6) × 6.0 (5.4–6.5) μm, unequal subspherical polar capsules (larger, 2.8 (2.5–3.1) × 2.7 (2.3–2.9) μm; smaller, 2.4 (2.1–2.6) × 2.0 (1.9–2.2) μm), and polar filament with 4–5 coils in larger capsule, 3–4 coils in smaller capsule. Eimeria patersoni n.sp. is described from the kidney, spleen, and liver of L. gibbosus. Oocysts are subspherical (11.9 × 10.6), sporocysts ellipsoidal (10.4 (9.9–11.2) × 3.5 (2.6–4.0) μm), and sporozoites stubby (3.6 × 2.0 μm); sporocyst residuum has 1–3 large granules.

PARASITES OF FRESHWATER FISH: II. PARASITISM OF SPECKLED AND LAKE TROUT AND THE FISH FOUND ASSOCIATED WITH THEM IN LAKE COMMANDANT, QUE.

1940 ◽  
Vol 18d (2) ◽  
pp. 66-78 ◽  
Author(s):  
L. L. Lyster
Keyword(s):  
Freshwater Fish ◽  
Lake Trout ◽  
Salvelinus Fontinalis ◽  
Perca Flavescens ◽  
Game Fish

Parasitism of two game fish, Salvelinus fontinalis and Cristivomer naymaycush and of two other fish, Perca flavescens and Catostomus commersonii is discussed. Glaridacris intermedius sp. nov. (Cestoda), Rhabdochona laurentiana sp. nov. (Nematoda) and Raphidascaris alius sp. nov. (Nematoda) are described.

PHYLLODISTOMUM LACHANCEI SP. NOV., A TREMATODE FROM THE URETERS OF SALVELINUS FONTINALIS (MITCHILL), WITH A NOTE ON ITS PATHOGENICITY

1947 ◽  
Vol 25d (4) ◽  
pp. 131-134 ◽  
Author(s):  
L. P. E. Choquette
Keyword(s):  
New Species ◽  
Salvelinus Fontinalis ◽  
Pathological Changes ◽  
A New Species

A new species of trematode (Gorgoderidae), Phyllodistomum lachancei, collected from speckled trout, Salvelinus fontinalis (Mitchill), in Montmorency County, Que., is described. The presence of this parasite in the ureters of the host produces at most only slight pathological changes.

Mechanisms responsible for the niche shift of brook charr, Salvelinus fontinalis Mitchill, when living sympatrically with creek chub, Semotilus atromaculatus Mitchill

1984 ◽  
Vol 62 (8) ◽  
pp. 1548-1555 ◽  
Author(s):  
Pierre Magnan ◽  
Gérard J. FitzGerald
Keyword(s):  
Laboratory Experiments ◽  
Salvelinus Fontinalis ◽  
Niche Shift ◽  
Intraspecific Aggression ◽  
Brook Charr ◽  
Semotilus Atromaculatus ◽  
High Level ◽  
Gill Raker ◽  
Creek Chub ◽  
Study Laboratory

When brook charr, Salvelinus fontinalis Mitchill, are in allopatry in oligotrophic Québec lakes, they feed largely on macrobenthic invertebrates. However, when brook charr cooccur with creek chub, Semotilus atromaculatus Mitchill, they feed largely on zooplankton. In the present study, laboratory experiments showed that creek chub were more effective than brook charr in searching for hidden, patchily distributed prey. The searching efficiency of an individual chub feeding in a group was improved through social facilitation. In contrast, the high level of intraspecific aggression observed in brook charr prevents the formation of such feeding groups. In the laboratory, brook charr were able to displace creek chub from the food source because of interspecific aggression. Data are presented showing that chub are morphologically better adapted than charr to feed on benthos (subterminal orientation of the mouth and protrusible premaxillae), while the charr are better adapted than chub to feed on zooplankton (gill raker structure). Differences in feeding behaviour, morphology, and relative abundance between these species appear to be important in the observed niche shift of brook charr in nature.

On Protozoal Blood Parasites Collected in Uganda

Parasitology ◽  
1932 ◽  
Vol 24 (2) ◽  
pp. 210-224 ◽  
Author(s):  
Cecil A. Hoare
Keyword(s):  
Life History ◽  
New Species ◽  
Intermediate Host ◽  
Blood Parasites ◽  
Parasitic Protozoa ◽  
History Of ◽  
New Hosts ◽  
Nomen Novum ◽  
Glossina Palpalis

This paper contains a report on a collection of parasitic protozoa from the blood of some vertebrate animals of Uganda.Seven new species and a number of parasites recorded for new hosts are described. New observations on some known parasites are also recorded.An account is given of the life history of the crocodile haemogregarine. It is shown that the schizogony of Hepatozoon pettiti (nomen novum for Haemogregarina pettiti) occurs in the liver of the crocodile, while the sporogony takes place in Glossina palpalis, its intermediate host.A list of all the blood parasites found, together with their hosts, is given.

Three New Species of Orientodiscus (Trematoda: Paramphistomata) from Freshwater Turtles

1965 ◽  
Vol 39 (4) ◽  
pp. 377-382 ◽  
Author(s):  
Ather H. Siddiqi
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
Freshwater Turtles ◽  
Three New Species

The genus Orientodiscus was proposed by Srivastava (1938) for O. jumnai and O. lobatus from a freshwater fish, Silundia gangeticus from India. Recently, Rhode (1963) added O. fernandoi and O. hendricksoni from freshwater turtles, Trionyx spp., from Malaysia. A large number of trematodes belonging to Orientodiscus were collected from freshwater turtles in Aligarh, India. They represent three new species.

A new species of small, long-snouted Hypogeophis Peters, 1880 (Amphibia: Gymnophiona: Indotyphlidae) from the highest elevations of the Seychelles island of Mahé

Zootaxa ◽  
2018 ◽  
Vol 4450 (3) ◽  
pp. 359 ◽  
Author(s):  
SIMON T. MADDOCK ◽  
MARK WILKINSON ◽  
DAVID J. GOWER
Keyword(s):  
New Species ◽  
Nuclear Gene ◽  
Iucn Red List ◽  
Red List ◽  
Global Distribution ◽  
Small Island ◽  
Gene Sequences ◽  
The Third ◽  
Iucn Red List Criteria ◽  
A New Species

A new species of indotyphlid caecilian amphibian, Hypogeophis montanus sp. nov., is described based on a series of specimens from the Seychelles island of Mahé, collected from two localities in 2013 and 2015. The new species most closely resembles the Seychelles (Mahé) endemic H. brevis in being short (maximum known total length in life ca. 110 mm) and long snouted, but differs by having more vertebrae, a relatively smaller head, and substantially distinct mitochondrial and nuclear gene sequences. Hypogeophis montanus sp. nov. is known from higher elevations (718–731 m) than H. brevis (ca. 350–650 m), and its elevationally restricted distribution on a single small island likely renders it threatened under IUCN Red List criteria. Hypogeophis montanus sp. nov. is the third species of small and long-snouted caecilian reported from the Seychelles. Along with H. brevis and H. pti, H. montanus sp. nov. is among the smallest known species of caecilian and possibly has the smallest global distribution. 

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