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.

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.

Fecundity and Egg Size of a Brood Stock of Salvelinus fontinalis × S. namaycush Hybrids (Splake)

1974 ◽  
Vol 31 (2) ◽  
pp. 217-220 ◽  
Author(s):  
G. B. Ayles
Keyword(s):  
Egg Size ◽  
Lake Trout ◽  
Salvelinus Fontinalis ◽  
Lake Huron ◽  
Female Size ◽  
Brood Stock ◽  
Trout Population ◽  
Egg Diameter

Estimates of average egg diameter and average number of eggs per female from a brood stock of Salvelinus fontinalis × S. namaycush (splake) hybrids were 0.468 cm and 1169 eggs, respectively. Variation in egg size between females was attributable to variation in both size and age of the fish, whereas differences in fecundity were attributed only to differences in female size. At a given size a splake had more and larger eggs than have been reported for lake trout. The significance of the findings is discussed in relation to the reestablishment of a viable trout population in Lake Huron.

A major sextet of mitochondrial DNA phylogenetic assemblages extant in eastern North American brook trout (Salvelinus fontinalis): distribution and postglacial dispersal patterns

1998 ◽  
Vol 76 (7) ◽  
pp. 1300-1318 ◽  
Author(s):  
Roy G Danzmann ◽  
Raymond P Morgan II ◽  
Matthew W Jones ◽  
Louis Bernatchez ◽  
Peter E Ihssen
Keyword(s):  
Mitochondrial Dna ◽  
Brook Trout ◽  
Lake Trout ◽  
Salvelinus Fontinalis ◽  
Salvelinus Alpinus ◽  
Large Degree ◽  
Dispersal Patterns ◽  
Small Stream ◽  
South Central ◽  
Haplotype 1

Mitochondrial DNA (mtDNA) restriction fragment length polymorphisms (RFLPs) of 2422 brook trout (Salvelinus fontinalis) from 60 units (major drainages, small stream catchments, and isolated lakes) representing 155 populations in eastern North America were examined to test hypotheses regarding postglacial dispersal and recolonization. An analysis of molecular variance (AMOVA) indicated that 38.8% of the variation was partitioned among the units, while approximately 60% was distributed among populations (phiST = 59.3) compared with 40.7% within populations. This distribution of variation suggests a large degree of heterogeneity in population founding events and phylogeographic structuring in this species. Comparisons of mtDNA diversity between fish from putative refugial and recolonization zones for this species indicate that more than one refugial region contributed to northern recolonization. Haplotypic diversities in recolonized regions are greatest in south-central populations (i.e., southern Great Lakes region), while only one haplotype (haplotype 1) predominates in northern, western, and eastern postglacial zones. Large phylogenetic differences were found between northern and southern populations. Populations outside the zone of glaciation were the most genetically heterogeneous and were represented by fish from all six (A-F) of the major evolutionary clades identified. Only fish from the A, B, and C clades were found in glaciated regions, with C lineage fish restricted to south-central glaciation zones. Fish from the C clade are putatively the most ancestral lineage within the species based upon composite shared RFLPs with lake trout (Salvelinus namaycush) and Arctic char (Salvelinus alpinus).

PARASITES OF FRESHWATER FISH: I. INTERNAL TREMATODES OF COMMERCIAL FISH IN THE CENTRAL ST. LAWRENCE WATERSHED

1939 ◽  
Vol 17d (7) ◽  
pp. 154-168 ◽  
Author(s):  
L. L. Lyster
Keyword(s):  
Freshwater Fish ◽  
Perca Flavescens ◽  
Commercial Fish

Sixteen species of trematodes from ten species of fish are discussed. Ptychogonimus fontanus sp. nov. from Perca flavescens is described.

scholarly journals Evidence of sound production by spawning lake trout (Salvelinus namaycush) in lakes Huron and Champlain

2018 ◽  
Vol 75 (3) ◽  
pp. 429-438 ◽  
Author(s):  
Nicholas S. Johnson ◽  
Dennis Higgs ◽  
Thomas R. Binder ◽  
J. Ellen Marsden ◽  
Tyler Buchinger ◽  
...  
Keyword(s):  
Acoustic Telemetry ◽  
Sound Production ◽  
Lake Trout ◽  
Salvelinus Fontinalis ◽  
Salvelinus Namaycush ◽  
Spawning Period ◽  
Sound Recordings ◽  
Laboratory Flume ◽  
And Control

Two sounds associated with spawning lake trout (Salvelinus namaycush) in lakes Huron and Champlain were characterized by comparing sound recordings with behavioral data collected using acoustic telemetry and video. These sounds were named “growls” and “snaps” and were heard on lake trout spawning reefs, but not on a nonspawning reef, and were more common at night than during the day. Growls also occurred more often during the spawning period than the prespawning period, while the trend for snaps was reversed. In a laboratory flume, sounds occurred when male lake trout were displaying spawning behaviors: growls when males were quivering and parallel swimming and snaps when males moved their jaw. Combining our results with the observation of possible sound production by spawning splake (Salvelinus fontinalis × Salvelinus namaycush hybrid) provides rare evidence for spawning-related sound production by a salmonid or any other fish in the superorder Protacanthopterygii. Further characterization of these sounds could be useful for lake trout assessment, restoration, and control.

scholarly journals JOINT SEGREGATION OF BIOCHEMICAL LOCI IN SALMONIDAE. II. LINKAGE ASSOCIATIONS FROM A HYBRIDIZED SALVELINUS GENOME (S. NAMAYCUSH x S. FONTINALIS)

Genetics ◽  
1980 ◽  
Vol 95 (3) ◽  
pp. 707-726
Author(s):  
Bernie May ◽  
Mark Stoneking ◽  
James E Wright
Keyword(s):  
Brook Trout ◽  
Lake Trout ◽  
Salvelinus Fontinalis ◽  
De Novo ◽  
Homeologous Chromosome ◽  
Homeologous Chromosomes ◽  
Joint Segregation ◽  
Duplicate Loci ◽  
Haploid Complement

ABSTRACT The results of more than 300 parwise examinations of biochemical loci for joint segregation in brook trout (Salvelinus fontinalis) and in the hybridized genome of lake trout (S. namaycush) × brook trout are summarized. Nineteen loci have been assigned to the following eight linkage groupings on the basis of nonrandom assortment, including cases of both classical linkage and pseudolinkage: ODH with PMI with PGI-3, PGI-2 with SDH, ADA-1 with AGP-2, AAT-(1,2) with AGP-1 with MDH-I, MDH-3 with MDH-4, LDH-3 with LDH-4, IDH-3 with ME-2 and GUS with CPK-I. Pseudolinkage (an excess of nonparental progeny types) was observed only for male testcross parents. The results suggest that this phenomenon involves homeologous chromosome arms as evidenced by the de novo association of presumed duplicate loci in each case. Classical linkage has not been found for the five pairs of duplicate loci examined in Salvelinus, suggesting that not all of the eight metacentrics in the haploid complement involve fusions of homeologous chromosomes. Females consistently showed a greater degree of recombination.

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