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Diversity of European freshwater cyclopoid species: phylogeny, morphology and ecology
Krajíček, Martin ; Černý, Martin (advisor) ; Brancelj, Anton (referee) ; Wyngaard, Grace (referee)
Cyclopoids are together with Calanoids and Harpacticoids a part of the largest, very diverse group of crustaceans and the most numerous aquatic metazoans of the world. The history of their research goes as far back as to the beginning of 19th century when the first cyclopoid copepods were described. The taxonomy of cyclopoids started to develop gradually since that time, adding new and more detailed methods and morphological characters, as well as a certain degree of taxonomical confusion. In last decades, the molecular-genetic techniques of DNA sequencing have become available offering a new independent tool for taxonomists. This work contains different studies concerning the morphology, taxonomy, ecology, distribution and colonisation of cyclopoid copepods, with the use of molecular tools as a uniting element. Chapter 1 of this thesis summarizes basic knowledge about the taxonomy, morphology and biology of cyclopoid copepods and introduces the following chapters containing four studies presented as single publications. The taxonomy of copepods of the genus Cyclops is based mainly on the morphology which is sometimes ambivalent and some of the most problematic species groups are presented here. Chapter 2 presents our unique results, the first reconstruction of phylogenetic relationships among 15...
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Genetic diversity of central European Cyclopsspecies
Krajíček, Martin ; Černý, Martin (advisor) ; Hudec, Igor (referee)
I studied the genetic diversity of central European Cyclops (Crustacea, Copepoda) species. The present thesis deals with all species of the genus Cyclops known from the Czech Republic (C. strenuus, C. vicinus, C. abyssorum, C.insignis, C. singularis and C. furcifer); the occurrence of C. singularis and C. heberti there is recorded herein for the first time. Other two species under study are C. ochridanus, an endemic species from the Ohrid lake, and an apparently new species of the genus Cyclops from the Retezat Mts. in Romania. Populations of Cyclops abyssorum from Romania, Slovakia and Switzerland were studied as well. The amplification of a part of the COI mitochondrial gene, using the universal arthropod primer (Folmer et al. 1994) or primers derived from it, was successful only in less than half of the populations under study. In contrast, amplification of a part of the 12S srRNA gene, using the primer of Machida et al. (2002), worked very well in all the populations. Cyclops abyssorum, a morphologically and ecologically variable species, showed very low between-population sequence polymorphism. The ecotypes "praealpinus", "divulsus" and "tatricus" seem to lack a species or subspecies status. They are likely to be, as Einsle (1980) supposed, morphological variations only. Populations of C....
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Diversity of European freshwater cyclopoid species: phylogeny, morphology and ecology
Krajíček, Martin
Cyclopoids are together with Calanoids and Harpacticoids a part of the largest, very diverse group of crustaceans and the most numerous aquatic metazoans of the world. The history of their research goes as far back as to the beginning of 19th century when the first cyclopoid copepods were described. The taxonomy of cyclopoids started to develop gradually since that time, adding new and more detailed methods and morphological characters, as well as a certain degree of taxonomical confusion. In last decades, the molecular-genetic techniques of DNA sequencing have become available offering a new independent tool for taxonomists. This work contains different studies concerning the morphology, taxonomy, ecology, distribution and colonisation of cyclopoid copepods, with the use of molecular tools as a uniting element. Chapter 1 of this thesis summarizes basic knowledge about the taxonomy, morphology and biology of cyclopoid copepods and introduces the following chapters containing four studies presented as single publications. The taxonomy of copepods of the genus Cyclops is based mainly on the morphology which is sometimes ambivalent and some of the most problematic species groups are presented here. Chapter 2 presents our unique results, the first reconstruction of phylogenetic relationships among 15...
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Genetic diversity of central European Cyclopsspecies
Krajíček, Martin ; Černý, Martin (advisor) ; Hudec, Igor (referee)
I studied the genetic diversity of central European Cyclops (Crustacea, Copepoda) species. The present thesis deals with all species of the genus Cyclops known from the Czech Republic (C. strenuus, C. vicinus, C. abyssorum, C.insignis, C. singularis and C. furcifer); the occurrence of C. singularis and C. heberti there is recorded herein for the first time. Other two species under study are C. ochridanus, an endemic species from the Ohrid lake, and an apparently new species of the genus Cyclops from the Retezat Mts. in Romania. Populations of Cyclops abyssorum from Romania, Slovakia and Switzerland were studied as well. The amplification of a part of the COI mitochondrial gene, using the universal arthropod primer (Folmer et al. 1994) or primers derived from it, was successful only in less than half of the populations under study. In contrast, amplification of a part of the 12S srRNA gene, using the primer of Machida et al. (2002), worked very well in all the populations. Cyclops abyssorum, a morphologically and ecologically variable species, showed very low between-population sequence polymorphism. The ecotypes "praealpinus", "divulsus" and "tatricus" seem to lack a species or subspecies status. They are likely to be, as Einsle (1980) supposed, morphological variations only. Populations of C....
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Diversity of European freshwater cyclopoid species: phylogeny, morphology and ecology
Krajíček, Martin
Cyclopoids are together with Calanoids and Harpacticoids a part of the largest, very diverse group of crustaceans and the most numerous aquatic metazoans of the world. The history of their research goes as far back as to the beginning of 19th century when the first cyclopoid copepods were described. The taxonomy of cyclopoids started to develop gradually since that time, adding new and more detailed methods and morphological characters, as well as a certain degree of taxonomical confusion. In last decades, the molecular-genetic techniques of DNA sequencing have become available offering a new independent tool for taxonomists. This work contains different studies concerning the morphology, taxonomy, ecology, distribution and colonisation of cyclopoid copepods, with the use of molecular tools as a uniting element. Chapter 1 of this thesis summarizes basic knowledge about the taxonomy, morphology and biology of cyclopoid copepods and introduces the following chapters containing four studies presented as single publications. The taxonomy of copepods of the genus Cyclops is based mainly on the morphology which is sometimes ambivalent and some of the most problematic species groups are presented here. Chapter 2 presents our unique results, the first reconstruction of phylogenetic relationships among 15...
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Diversity of European freshwater cyclopoid species: phylogeny, morphology and ecology
Krajíček, Martin ; Černý, Martin (advisor) ; Brancelj, Anton (referee) ; Wyngaard, Grace (referee)
Cyclopoids are together with Calanoids and Harpacticoids a part of the largest, very diverse group of crustaceans and the most numerous aquatic metazoans of the world. The history of their research goes as far back as to the beginning of 19th century when the first cyclopoid copepods were described. The taxonomy of cyclopoids started to develop gradually since that time, adding new and more detailed methods and morphological characters, as well as a certain degree of taxonomical confusion. In last decades, the molecular-genetic techniques of DNA sequencing have become available offering a new independent tool for taxonomists. This work contains different studies concerning the morphology, taxonomy, ecology, distribution and colonisation of cyclopoid copepods, with the use of molecular tools as a uniting element. Chapter 1 of this thesis summarizes basic knowledge about the taxonomy, morphology and biology of cyclopoid copepods and introduces the following chapters containing four studies presented as single publications. The taxonomy of copepods of the genus Cyclops is based mainly on the morphology which is sometimes ambivalent and some of the most problematic species groups are presented here. Chapter 2 presents our unique results, the first reconstruction of phylogenetic relationships among 15...
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