Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"Polychaete"”.
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Factors Shaping Macrofaunal Polychaete Communities in the Gulf of Mexico
… and functional diversity in deep-sea benthic polychaete communities in the Gulf of Mexico (GoM). The study includes samples from two major sampling programs: the Deep Gulf of Mexico Benthos (DGoMB) program (2000?2002) (51 stations, 200-3700 m) and the SIGSBEE program (Universidad Nacional …
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Notes on the natural history of the Sabellariid polychaete Phragmatopoma californica
… responsible for these masses of tubes is a small polychaete, Phragmatopoma californica.</p><p>Very little work has been done on the natural history of local sabellarlids. It is therefore the purpose of this paper to present data pertaining to the natural history of the sabellarlid polychaete, …
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Conservation of polychaete biodiversity within the Port Stephens-Great Lakes Marine Park
… in biodiversity. This research employed polychaete biodiversity as the object of biodiversity assessment and conservation. Polychaetes were used as they can comprise over one-third of species of benthic infaunal assemblages, they are the most frequent and abundant marine metazoans in …
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The synecology of dense assemblages of the deposit-feeding Polychaete, Axiothella rubrocincta (Maldanidae)
<p>Interspecific interactions have been shown to play critical roles in determining the realized niches of species in marine rocky intertidal (ie Connell 1961, Paine 1966,, Dayton 1971) and terrestrial (i.e~ Harper 1969, Pianka 1973, Cody 1974) communities. In contrast, such interactions have not …
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Mate choice in the Polychaete nereis acuminata : the role of aggression and parental experience
Nereis acuminata is a polychaete species with a unique life cycle. A male and female form a monogamous pair bond, the female lays eggs and dies. The male then fertilises the egg and undertakes sole parental care until the eggs hatch and larvae leave the parental burrow; the male can then reproduce …
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The relationship between sediment composition and infaunal polychaete communities along the southern coast of Namibia
… between sediment structure and infaunal polychaete communities off the southern coast of Namibia from two separate sets of data, and a total of ninety-two samples. It also examined whether a selected group of organisms (polychaetes) could provide the same level of information regarding …
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Abyssal polychaete assemblages along latitudinal gradients of productivity in the equatorial Pacific and North Atlantic Oceans
Patterns in polychaete abundance, body size and diversity were investigated at 12 sites between 4300 and 5000 m in the central Pacific and the north-east Atlantic. In the central Pacific, three of the sites (EqPac 0N, 2N and 5N) were observed to lie under high surface productivity regimes, and they …
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The Effect of Heavy Metals on the Uptake of L-Histidine by the Polychaete Nereis Succinea
Integumentary uptake of 3H-L-Histidine by Nereis succinea was measured in the presence and absence of selected heavy metals and inhibitors in 60% artificial seawater (ASW). At low concentrations of L-Histidine (10 uM), metals stimulated L-Histidine uptake from ASW. Higher concentrations of metal …
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Biodiversity and Biogeography of Polychaetes (Annelida): Globally and in Indonesia
… thesis presents a review of the biodiversity of polychaete worms (Annelida) and their distribution across the globe. It also provides an evaluation of polychaete biodiversity studies in Indonesia and a description of a new polychaete species collected from Ambon Island, Province of Maluku, …
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Benz(a)anthracene in benthic marine environments : bioavailability, metabolism, and physiological effects on the polychaete Neries virens
… experiments in the presence and absence of the polychaete Nereis virens. In concert with chemical analysis of BA and its metabolites in all components of the system, physiological and biochemical effects of exposure on Nereis were investigated. BA was introduced in three ways: already sorbed to …
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Taxonomy and biology of deep-sea polychaetes: temporal variability in polychaete assemblages of the abyssal NE Atlantic Ocean
Taxonomy and temporal variability of deep-sea polychaete assemblages was assessed over a 9-year period. Macrofauna 300 ?m fraction samples, taken with USNEL box core (0.25 m2), were studied from Porcupine Abyssal Plain, NE Atlantic Ocean from 8 cruises between August 1989 and September 1998. A …
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Variação temporal da macrofauna bentônica sublitoral da praia da Urca (RJ) após a ocorrência de ressacas, com ênfase na fauna de anelídeos poliquetas
… of Urca beach, with special emphasis on polychaete fauna. Urca beach is located at the western point of Guanabara bay, situated at Rio de Janeiro state. Density of the macrofauna was monitored along a year, after the beginning of a great storm at that region in 2th July, 1997, being …
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Ecology of Manayunkia speciosa
… speciosa</italic> Leidy is a freshwater polychaete that is widely distributed in coastal areas of the United States and Canada. Relatively little is known about the ecology of this species. However, the discovery that <italic>M. speciosa</italic> plays an obligate role in the life cycle …
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Genomic and Phenotypic Analyses of Polychaete Sibling Species <i>Platynereis dumerilii</i> and <i>Platynereis massiliensis</i> in Relation to Ocean Acidification
… investigated the effects of natural OA on the polychaete species <i>Platynereis dumerilii</i> and its sibling <i>P. massiliensis</i> (Annelida, Nereididae) as driver of genetic differentiation and phenotype/genotype selection. <i>Platynereis</i> spp. populations were sampled in five …
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Metals and polycyclic aromatic hydrocarbons in environmental matrices of the Fleet Lagoon, UK and toxicological investigations using the marine polychaete Hediste diversicolor.
… sediment dwelling organisms including the marine polychaete Hediste diversicolor. Following exposure, an organism may deploy a variety of biochemical, cellular, molecular and behavioural alterations to maintain homeostasis and reduce the effects of the insult. Biomarkers are used within …
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