Global ETD Search
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Showing 1 to 12 of 12 for “"Ascidians"”.
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Taxonomic studies on adult and larval ascidians from California
… is to further morphological studies on larval ascidians and to encourage greater reliance on larval structures in ascidian taxonomy. This may necessitate some revisions in current classifications, but it is hoped that such revisions will lead to a better understanding of the group. Some general …
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Marine Bioinvasions in Anthropogenic and Natural Habitats: an Investigation of Nonindigenous Ascidians in British Columbia
… investigated the distribution of nonindigenous ascidians on Southern Vancouver Island, British Columbia, Canada. Third, I tested methods for in-situ larval inoculations and utilized these techniques to manipulate propagule supply and assess post-settlement mortality of ascidians across habitat …
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Climate change and invasive species interact to impact succession and diversity in Gulf of Maine marine fouling communities
… to decline; concurrently invasive tunicates (ascidians) became conspicuous members of fouling communities. These abiotic and biotic changes may lead to shifts in species composition, diversity and succession. The goals of these studies were to examine the relationship between depressed …
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Studies in Marine Natural Product Synthesis, Isolation and Ecology
… and chemical evaluation of 29 New Zealand ascidians has been performed. Significant biological activity was detected in ten ascidians. Novel metabolites isolated were 2-(3'-bromo-4'-hydroxyphenol)ethanamine (Cnemidocarpa bicomuta) and 1,3-dimethylguanine (unidentified ascidian). Known …
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Contribuição para o conhecimento da fauna de Ascidiaceae, da Ilha de Boa Viagem, Niterói, Rio de Janeiro: (sistemática e notas biológicas)
… about the time of maturation of the ascidians before the accident.
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Evolutionary and Developmental Survey of Genes Involved in Chordate Pigmentation
… contains first data about a Kelch-like member in ascidians, providing new insights in pigmentation or pigment cell specification. This encourages further analyses on its gene regulatory network and possible function.
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Spatial distribution and diversity of soft-bottom benthic invertebrates from demersal trawl surveys off the coast of Namibia
… were observed in the northern region, whilst ascidians dominated the central region, and Brissopsis lyrifera capensis and Suberites dandelenae in the south. In terms of depth, relatively high taxa richness was observed between the inner and middle shelf (101 - 400 m). Benthic invertebrate …
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Potent but forgotten: nitrous oxide contributions by an ascidian on warming reefs
… microorganisms that were present across all ascidians. Warming altered H. grandis’ section-specific microbiomes and I found large relative abundances of ammonia oxidising archaea on H. grandis’ exterior, suggesting a possible pathway for N2O production. Next, I found that H. grandis …
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Distribution and predictors of non-indigenous marine species within South Africa's MPA network
… the bryozoan Cryptosula pallasiana and the ascidians Microcosmus squamgiger and Diplosoma listerianum. CART analysis indicated that the size of the nearest port was an important indicator of the number of alien species in an MPA. When the nearest port is bigger than 0.4 km², more alien …
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Use of genetic methods for determining patterns and processes during marine biological invasions
… marine bioinvasions, and in particular invasive ascidians. Part One (Chapters Two and Three) contains chapters that focus on the detection and identification of marine invasive species with molecular methods. Part Two (Chapters Four, Five and Six) examines how molecular methods can aid in …
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The Ecology and Demography of the Invasive Ascidian Botrylloides violaceus in the Coos Estuary
Marine fouling communities on docks and other man-made structures are highly susceptible to invasion by non-native ascidian species. Botrylloides violaceus, a colonial ascidian, is a cosmopolitan invader of fouling communities in bays and harbors including Oregon’s Coos Estuary. This study …