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  • Canadian Science Publishing  (11)
  • 1
    Online Resource
    Online Resource
    A phylogenetic reassessment of the monophyletic status of the family Soleidae, with comments on the suborder Soleoidei (Pisces; Pleuronectiformes)
    Canadian Science Publishing ; 1988
    In:  Canadian Journal of Zoology Vol. 66, No. 12 ( 1988-12-01), p. 2797-2810
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 66, No. 12 ( 1988-12-01), p. 2797-2810
    Abstract: This article presents the phylogenetic conclusions of an osteological study of species belonging to the subfamilies (Soleinae and Achirinae) of the dextral flatfish family Soleidae (Pieuronectiformes; Soleoidei). A cladistic analysis of the data revealed that the subfamilies, but not the family, are monophyletic. The Soleinae were found to be more closely related to the other soleoid family, the Cynoglossidae, than to the Achirinae. If we accept the principle that only monophyletic groups are to be admitted into Linnean classification, it is suggested that the two subfamilies be raised to the family level. The anatomical data led to the proposal (with caution) that the sister group of the achirid–soleid–cynoglossid lineage is the pleuronectid subfamily Samarinae. Consequently, it is suggested that the suborder Soleoidei be eliminated by incorporating its three families into the Pleuronectoidei which becomes monophyletic. Also, it is proposed that the Pleuronectid subfamilies (Pleuronectinae, Poecilopsettinae, Paralichthodinae, Rhombosoleinae, Samarinae) be raised to the family level. However, since the monophyletic status of these taxa is dubious (except for the Samarinae) any hypothesis including them must await a proper cladistic analysis of their intra- and inter-relationships.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z88-408
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1988
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 2
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    Online Resource
    Les métau× (Mn, Cu, Cd, Zn et Hg) des meuniers noirs (〈i〉Catostomus commersoni〈/i〉) et des grands brochets (〈i〉Eso× lucius〈/i〉) de l'amont et de l'aval du barrage Moses-Saunders sur le fleuve Saint-Laurent près de Cornwall (Ontario) et Massena (New York)
    Canadian Science Publishing ; 1999
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 56, No. 12 ( 1999), p. 2240-2247
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 56, No. 12 ( 1999), p. 2240-2247
    Type of Medium: Online Resource
    ISSN: 1205-7533 , 0706-652X
    URL: Article
    DOI: 10.1139/cjfas-56-12-2240
    Language: Unknown
    Publisher: Canadian Science Publishing
    Publication Date: 1999
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 3
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    Long-term assessment of the effect of introduced predatory fish on minnow diversity in a regional protected area
    Canadian Science Publishing ; 2012
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 69, No. 11 ( 2012-11), p. 1798-1805
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 69, No. 11 ( 2012-11), p. 1798-1805
    Abstract: Introduced piscivorous fishes had a dramatic impact on small-bodied fish species diversity of small temperate lakes in Gatineau Park, Quebec, Canada, on the basis of three surveys carried out over a 38-year period from 1970 to 2007. For three overlapping sets of lakes based on different combinations of survey years (lakes surveyed in 1970–1971, 1991–1992, and 2006–2007 (N = 14); lakes surveyed in 1970–1971 and 2006–2007 (N = 21); and lakes surveyed in 1991–1992 and 2006–2007 (N = 16)), those with introduced piscivores showed substantial and consistent temporal declines in average minnow species richness but much weaker, if any, declines in total species richness. By contrast, lakes without introduced piscivores showed no such decline. Whereas lakes without piscivores showed a strong species–elevation relationship early in the record, the strength of this relationship was much lower in lakes with introduced piscivores. Moreover, the strength of the species–elevation relationship declined precipitously over time in lakes with introduced piscivores, but remained stable in lakes where introduced piscivores were absent. The negative impact of piscivore introductions on small-bodied fish biodiversity in small lakes underscores the importance of action to mitigate the risk of future introductions or invasions.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/f2012-105
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 2012
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 4
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    Online Resource
    Erratum: Comparative osteology and intergeneric relationships of the tongue soles (Pisces; Pleuronectiformes: Cynoglossidae)
    Canadian Science Publishing ; 1988
    In:  Canadian Journal of Zoology Vol. 66, No. 8 ( 1988-08-01), p. 1903-1903
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 66, No. 8 ( 1988-08-01), p. 1903-1903
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z88-277
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1988
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 5
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    Impact de la maladie des points noirs sur la biologie du complexe Phoxinus (Cyprinidae) du lac Fortune, Québec
    Canadian Science Publishing ; 1994
    In:  Canadian Journal of Zoology Vol. 72, No. 9 ( 1994-09-01), p. 1611-1615
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 72, No. 9 ( 1994-09-01), p. 1611-1615
    Abstract: The purpose of this study was to quantify the effects of the black spot disease on growth, health, and fecundity of the fish and to define predictive parameters related to the infestation. Cyprinids belonging to the Phoxinus complex (P. eos, P. eos × P. neogaeus) of Lake Fortune (Gatineau Park, Québec, Canada) were sampled periodically between June and September 1992. The highest intensity of infestation was encountered in September (0–216 black spots; [Formula: see text], SD = 26.0). Our results indicate that: (i) the condition index of the Phoxinus complex and the gonadosomatic index in females are not affected by the level of infestation; (ii) age is a better predictive parameter of the number of black spots than total length; (iii) fins are significantly more infested than the body; and (iv) infestation occurs mainly between June and September. Our results suggest that the black spot disease does not influence the biology of fish belonging to the Phoxinus complex, even in instances of severe infestation.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z94-214
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 6
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    Les métaux (Mn, Cu, Cd, Zn et Hg) des meuniers noirs ( Catostomus commersoni ) et des grands brochets ( Esox lucius ) de l'amont et de l'aval du barrage Moses-Saunders sur le fleuve Saint-Laurent près de Cornwall (Ontario) et Massena (New York)
    Canadian Science Publishing ; 1999
    In:  Canadian Journal of Fisheries and Aquatic Sciences Vol. 56, No. 12 ( 1999-12-01), p. 2240-2247
    Details
    In: Canadian Journal of Fisheries and Aquatic Sciences, Canadian Science Publishing, Vol. 56, No. 12 ( 1999-12-01), p. 2240-2247
    Abstract: We examined the effect of a dam on concentrations of metals (Mn, Cu, Cd, Zn, and Hg) in white sucker (Catostomus commersoni) and in northern pike (Esox lucius). Fish were caught upstream and downstream of the Moses-Saunders Power dam on the St. Lawrence River near Cornwall, Ontario, and Massena, New York. Upstream of the dam, Lake St. Lawrence is a 136-km 2 reservoir resulting from the flooding of 90 km 2 of agricultural land in 1958, and downstream is Lake St. Francis. In northern pike, no difference in the mean concentrations of metals was found between upstream and downstream fish. Hg concentrations increased with length in upstream and downstream pike, whereas Zn showed an inverse relationship with length downstream. For a particular length, Hg concentration was higher in downstream northern pike. On average, white sucker were five times more contaminated by Hg upstream than downstream. The levels of Mn and Cu were also found to be higher upstream. No bioaccumulation of metals was observed in white sucker. Based on the results obtained for the northern pike, after 37 years, it seems that the high metal concentrations observed in Lake St. Lawrence after the creation of the reservoir have now disappeared. We believe that the high level of contamination of the white suckers in this lake is linked with this species' habit of being in constant contact with the sediments, which could be locally highly contaminated.
    Type of Medium: Online Resource
    ISSN: 0706-652X , 1205-7533
    URL: Article
    DOI: 10.1139/f99-137
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1999
    detail.hit.zdb_id: 7966-2
    detail.hit.zdb_id: 1473089-3
    SSG: 21,3
    SSG: 12
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  • 7
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    Online Resource
    Study of a stunted population of yellow perch ( Perca flavescens ) in a monospecific lake in Gatineau Park, Quebec
    Canadian Science Publishing ; 1994
    In:  Canadian Journal of Zoology Vol. 72, No. 9 ( 1994-09-01), p. 1576-1582
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 72, No. 9 ( 1994-09-01), p. 1576-1582
    Abstract: A reported case of stunting was examined in a population of yellow perch, Perca flavescens, from a monospecific lake (Lac du Printemps) in Gatineau Park, Quebec. In total, 516 specimens were sampled in early October 1992. Females grew significantly faster than males, and also attained a greater length and age (241 mm, 10 years) than males (172 mm, 7 years). Compared with other populations in Quebec, the growth rate of this population was well below average; age-classes converged towards a similar size at earlier ages; the maximum age attained by males was less than average for the species, and males and females reached sexual maturity at an earlier age (0+ and 1+, respectively). These results are consistent with those found in stunted populations. Males aged 0+ had an average gonadosomatic index of 9.3%, which is one of the highest ever reported for this species. The index decreased gradually with age. Fish were absent from the stomach contents of 300 specimens examined. Owing to their large size, young-of-the-year yellow perch were not preyed upon by older perch at that time of year. The lack of availability of fish prey may contribute to the stunted state of this population. Other contributing factors are intraspecific competition and the absence of top predators in the population. A comparison of the population in 1981 and 1992 indicated that it has been stunted for at least a decade.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z94-209
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1994
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 8
    Online Resource
    Online Resource
    Comparative osteology and intergeneric relationships of the tongue soles (Pisces; Pleuronectiformes; Cynoglossidae)
    Canadian Science Publishing ; 1988
    In:  Canadian Journal of Zoology Vol. 66, No. 5 ( 1988-05-01), p. 1214-1232
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 66, No. 5 ( 1988-05-01), p. 1214-1232
    Abstract: This article contains the first detailed osteological study of several flatfish species belonging to the three currently recognized genera of tongue soles (Cynoglossidae). The resulting information was used to reassess, following the cladistics methodology, the monophyletic status of the family and to put forward a hypothesis of generic relationships. The polarity of the character states was determined by outgroup comparison using the Soleidae as the sister group of the Cynoglossidae and the Achiridae as the sister group of the soleid–cynoglossid lineage. An analysis of numerous characters corroborated the monophyletism of the Cynoglossidae. It was also found that the genus Symphurus (Symphurinae) is monophyletic and is the sister group of the monophyletic Cynoglossus–Parapaglusia (Cynoglossinae) lineage. Parapaglusia was shown to be monophyletic, but no evidence was found to corroborate a similar status for Cynoglossus. An examination of the osteology of more species belonging to the speciose genera Symphurus and Cynoglossus is needed to further test this hypothesis of relationships.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z88-177
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1988
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 9
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    Online Resource
    Variation in the preoperculomandibular canal of the johnny darter, Etheostoma nigrum , with associated zoogeographical considerations
    Canadian Science Publishing ; 1992
    In:  Canadian Journal of Zoology Vol. 70, No. 12 ( 1992-12-01), p. 2315-2321
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 70, No. 12 ( 1992-12-01), p. 2315-2321
    Abstract: A total of 1267 specimens (from 87 stations) of the johnny darter, Etheostoma nigrum, were studied to examine the geographic variation in the numbers of pores on the preoperculomandibular canal. The pore count is bimodal for the total sample. These modes correspond to distinct geographic regions. Fishes from northern Ontario (west and north of Lake Nipigon), Manitoba, Saskatchewan, Minnesota, Wisconsin, Iowa, and the Upper Peninsula of Michigan usually have 7 or fewer pores (mode = 6). Populations from northern Ontario (east and south of Lake Nipigon), southern Ontario, Quebec, Illinois, Indiana, Kentucky, Tennessee, Maryland, Ohio, New York, Pennsylvania, West Virginia, Virginia, North Carolina, South Carolina, and the Lower Peninsula of Michigan have 8 or more pores (mode = 9). The differentiation between morphs predates their present distribution and the morphs probably occupied distinct geographic areas within the Mississippi refugium during the last glaciation. Etheostoma nigrum dispersed north, following two postglacial routes: (i) via the Mississippi River to Lake Agassiz (12 800 years BP) then eastward to the Hudson Bay and James Bay drainages via Lake Barlow–Ojibway (9500 years BP), and (ii) via a northeastern spread from the Great Lakes and Ohio River drainages to the St. Lawrence River and Ottawa River drainages (12 000 years BP).
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z92-310
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1992
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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  • 10
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    Online Resource
    Les conséquences de la reconnaissance des contraintes phylogénétiques lors de l'étude évolutive de l'origine des traits
    Canadian Science Publishing ; 1985
    In:  Canadian Journal of Zoology Vol. 63, No. 10 ( 1985-10-01), p. 2233-2239
    Details
    In: Canadian Journal of Zoology, Canadian Science Publishing, Vol. 63, No. 10 ( 1985-10-01), p. 2233-2239
    Abstract: This study examines the origin and consequences of the disregard of evolutionary biologists towards the historical constraints emerging from phylogenetic studies. An attempt is made to establish the theoretical basis that would allow the integration of these constraints in studies related to the understanding of evolutionary processes responsible for the origin of traits. First, the historical context is defined following the concepts of cladistic methodology. Then the empirical limits intrinsic to the structure of the theory of natural selection are outlined. Extrapolations of this evolutionary process at a historical level are not justifiable because of the impossibility of empirical verification. As a prerequisite for the study of species, it becomes essential to distinguish the autapomorphies (evolutionary novelties) from the plesiomorphies (primitive characters). Only the autapomorphies are potentially open to studies concerned with the ultimate causes related to their origin, since it is possible to gather the relevant data. On the other hand, since the selective pressures now affecting the plesiomorphies are not necessarily the same as those responsible for their origin, and since it is impossible to recreate the historical context in which they have originated, it is preferable that evolutionary biologists refrain from elaborating scenarios pertaining to the origin of those traits. A parallel is made between these two types of features and previous concepts of adaptation and exaptation. An example related to the origin of the "reversed" size dimorphism of the Falconiformes is used to illustrate these theoretical concepts.
    Type of Medium: Online Resource
    ISSN: 0008-4301 , 1480-3283
    URL: Article
    DOI: 10.1139/z85-331
    RVK:
    WA 15000
    Language: English
    Publisher: Canadian Science Publishing
    Publication Date: 1985
    detail.hit.zdb_id: 1490831-1
    SSG: 12
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