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Showing 1 to 8 of 8 for “"Actinopterygii"”.
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Investigations of Phylogenetic Relationships of the Percidae (Actinopterygii: Perciformes) Using Comparative DNA Sequences
Darters are a diverse monophyletic lineage of the freshwater fish family Percidae. The majority of percid species (91%) are darters, which are endemic to North America. This investigation attempts to resolve phylogenetic relationships of percid fishes at three hierarchical levels. First, complete …
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Studio citogenetico della famiglia Muraenidae (Anguilliformes: Actinopterygii) mediante tecniche di citogenetica classica e molecolare
Moray eels (Actinopterygii, Anguilliformes, Muraenidae) are teleosts widespread in tropical and temperate seas and among the most common predators of the coral reef. Nevetherless, they are too little studied due to their hidden and nocturnal habits; furthermore, they are not important commercially, …
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THE WORLD ACCORDING TO GARS: THE MOLECULAR SYSTEMATICS AND COMPARATIVE PHYLOGEOGRAPHY OF LIVING GARS (ACTINOPTERYGII: LEPISOSTEIDAE)
… species of gars in two genera (Lepisosteiformes: Actinopterygii). In my first chapter, I estimate phylogenetic relationships among six of them using DNA data generated from four complete mitochondrial loci (cytb, CR, 12S, and 16S) and a single, partial nuclear locus--recombination activating …
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Integrating morphological data from fossil and living species and the early evolution of ray-finned fishes (Actinopterygii)
… history. I use the ray-finned fishes (Actinopterygii) as a study system due to their excellent, ~380-million-year fossil record and their extraordinary living diversity, which includes one out of every two vertebrate species. My first chapter explores an empirical case study of the …
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Assimetria flutuante dos otólitos sagitta de robalo-flecha, Centropomus undecimalis (actinopterygii: centropomidae), nos sistemas lagunares do leste fluminense, como indicadores ambientais
A assimetria flutuante (FA) representa o desvio aleatório da simetria bilateral perfeita e é associada a incapacidade dos indivíduos de proteger seu desenvolvimento contra distúrbios pequenos e aleatórios. Neste contexto se insere o robalo-flecha, Centropomus undecimalis, uma espécie hermafrodita e …
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Uso de marcadores biológicos em mugil curema; valenciennes, 1836 (actinopterygii : mugilidae) no diagnóstico ambiental de estuários da região nordeste do Brasil
Na Região Nordeste do Brasil, os grandes centros urbanos localizam-se nas regiões costeiras próximos a ambientes estuarinos. Como consequência, estes ambientes têm sofrido uma grande intervenção ambiental, decorrente da descarga de efluentes produzidos pela intensa atividade humana. Esses compostos …
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Studies on the diversity and distribution of marine ichthyoparasites in Southern Africa
… with 269 host taxa spread across the classes Actinopterygii (186), Elasmobranchii (80), Holocephalii (2) and Myxini (1). Host species with the most diverse parasite assemblages were species of commercial significance, namely Thyrsites atun (20) followed by Merluccius capensis (17). The …