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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The reproductive biology of Ceratostoma nuttalli (Prosobranchia, Muricidae) an example of parasitism and imposex /

Mendez-Sanchez, Leticia. January 1985 (has links)
Thesis (M.S.)--San Diego State University, 1985. / Includes bibliographical references (leaves 79-82).
2

The importance of feeding ecology in investigating accumulated heavy metal body burdens in Thais clavigera (KÜSTER) (mollusca: neogastropoda: muricidae) in Hong Kong /

Blackmore, Graham Ralph. January 1998 (has links)
Thesis (Ph. D.)--University of Hong Kong, 1999. / Includes bibliographical references (leaves 223-242).
3

The population dynamics and feeding ecology of Thais clavigera (Kuster) and Morula musiva (Kiener) (mollusca: gastropoda: muricidae)in Hong Kong

唐潔瑩, Tong, Kit-ying, Lily. January 1986 (has links)
published_or_final_version / Zoology / Master / Master of Philosophy
4

The population dynamics and feeding ecology of Thais clavigera (Kuster) and Morula musiva (Kiener) (mollusca: gastropoda: muricidae) in Hong Kong /

Tong, Kit-ying, Lily. January 1986 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1986.
5

The incidence of imposex in Hong Kong and the value of Thais clavigera (Gastropoda: muricidae) as a bioindicator of TBT pollution /

Li, Zhengyan. January 2000 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 150-175).
6

The importance of feeding ecology in investigating accumulated heavy metal body burdens in Thais clavigera (KÜSTER) (mollusca:neogastropoda: muricidae) in Hong Kong

Blackmore, Graham Ralph. January 1998 (has links)
published_or_final_version / Ecology and Biodiversity / Doctoral / Doctor of Philosophy
7

Foraging behaviour of Thais clavigera: the interplay of environmental variation and predator behaviour onsheltered rocky shores

Chow, Chi-yui., 周子叡. January 2004 (has links)
published_or_final_version / abstract / toc / Ecology and Biodiversity / Master / Master of Philosophy
8

The distribution, biosynthetic origin and functional significance of Tyrian purpe precursors in the Australian muricid Dicathais orbita (Neogastropoda : Muricidae)

Westley, Chantel Barbara, January 2008 (has links)
Thesis (Ph.D.)--Flinders University, School of Biological Sciences. / Typescript bound. Includes bibliographical references: (p. 237-268) Also avaialable online.
9

Estudo populacional de Stramonita haemastoma (Gastropoda, Prosobranchia) / A population study of Stramonita haemastoma (Gastropoda, Prosobranchia))

Udelsmann, Bruno 02 November 2009 (has links)
Orientadores: Vera Nisaka Solferini, Sonia Cristina da Silva Andrade / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Biologia / Made available in DSpace on 2018-08-14T00:32:41Z (GMT). No. of bitstreams: 1 Udelsmann_Bruno_M.pdf: 3710944 bytes, checksum: d180c3d886961b5fcad87d1976916dd3 (MD5) Previous issue date: 2009 / Resumo: Neste estudo foram analisados por eletroforese de isoenzimas e morfometria tradicional, indivíduos de Stramonita haemastoma, uma espécie de gastrópode que habita costões rochosos no litoral brasileiro. Foram feitas coletas em nove localidades no litoral dos estados de Santa Catarina, São Paulo e Rio de Janeiro. Em estudo prévio com esta espécie havia sido encontrado um distinção genética em dois grupos. Tal distinção se manteve, com diferenças marcantes nas freqüências dos alelos de três locos. Assim sendo, após interpretação dos géis de isoenzimas as amostras foram sub-divididas em dois grupos, denominados A e B. E esta divisão foi corroborada por um teste de atribuição de genótipos utilizando o programa Structure. Os grupos genéticos foram então tratados independentemente para a obtenção de estimativas de variabilidade e estruturação genéticas. Os valores encontrados foram similares aos de outros moluscos com desenvolvimento larval planctotrófico. Sendo encontrada variabilidade moderadamente alta e estruturação reduzida. O grupo B apresentou maior estruturação indicando possíveis diferenças entre os grupos quanto ao desenvolvimento e dispersão. Foram encontrados poucos desvios significativos do equilíbrio de Hardy-Weinberg foram poucos, assim como de desequilíbrio de ligação. Diversos locos apresentaram diferenças significativas de freqüência entre os grupos A e B. A distância genética média das amostras foi de 0,338 entre os grupos, 0,006 entre as amostras do grupo A e 0,015 entre as amostras do grupo B. Estes valores são comparáveis aos encontrados em espécies cogenéricas. Nos mesmos indivíduos das análises genéticas foram tomadas oito medidas distintas para análise morfológica. As medidas foram analisadas separadamente e por análise de componentes principais. A maior parte da diversidade foi encontrada entre as localidades amostradas e não entre os grupos A e B. Nossos resultados indicam que S. haemastoma possui uma complexidade taxonômica ainda não elucidada, tendo os grupos A e B características de espécies crípticas. / Abstract: In this study, Stramonita haemastoma individuals, a gastropod who inhabits marine rocky shores, were analysed through isozymes electrophoresys and traditional morphometrics. Nine localities in the brazilian shore, extending from Santa Catarina to Rio de Janeiro were sampled. In a preliminary study, a genetic distinction in two different groups was detected. This distinction continues to be found, with evident differentiation in three loci and in minor degree in other loci. After the interpretation of the isozymes data, individuals were adressed as belonging to groups A or B according to their genotypes. To corroborate with this division a genotype atribution test was performed using the software Structure, which resulted in a division 92% similar. The groups A and B were treated independently to obtain the genetic variability and structure parameters. Values were similar to other molluscs whith similar larval development, with moderately high variation and reduced population structure. Group B has higher population structure indicating possible differences in development or dispersal. There were few deviations to Hardy-Weinberg and few linkage disequilibrium, many loci differed in frequencies between populations of distinct groups. Genetic distance was in average 0,338 between populations of distinct genetic groups, a value comparable to other cogeneric species. Between group A populations the distance was in average 0,006 and between group B populations distance was of 0,015 in average. The same individual from the genetic analysis were used for the morphometrics. Eight different shell measures were used. Data was analysed measure by measure and through principal components analysis. The majority of variation was found between sample sites rather than between the groups A and B. From the results of this study it is possible to affirm that the taxonomy of S. haemastoma is not fully understood. The groups A and B have typical characteristics of cogeneric sibling species. More studies are necessary, in broader areas to asses the groups the status of distinct species, by the moment S. haemastoma should be adressed as a species complex. / Mestrado / Genetica Animal e Evolução / Mestre em Genética e Biologia Molecular
10

Contribuição ao conhecimento da taxonomia em Thais (Stramonita) haemastona (Linnaeus, 1767) (Mollusca, Gastropoda, Muricidae)

Leal, José Henrique Nobrega 02 May 1984 (has links)
Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2017-10-18T19:39:47Z No. of bitstreams: 1 415912.pdf: 5939612 bytes, checksum: 7d5c2e2101691d8deca072c00b62b9ed (MD5) / Made available in DSpace on 2017-10-18T19:39:47Z (GMT). No. of bitstreams: 1 415912.pdf: 5939612 bytes, checksum: 7d5c2e2101691d8deca072c00b62b9ed (MD5) Previous issue date: 1984-05-02 / Apresenta a caracterização do molusco gastrópode Thais haemastoma (Linnaeus, 1767), incluindo seu posicionamento com relação às categorias taxonômicas superiores, até subclasse, descrições de concha, opérculo, rádula e de estruturas das partes moles de interesse taxonômico. São incluídos dados sobre distribuição geográfica, lista sinonímica, registros da espécie no Brasil, além de listagem do material examinado. / The gastropod mollusc Thais haemastoma (Linnaeus, 1767) is characterized, including its taxonomic positioning up to the subclass level. Descriptions of the shell, operculum and radula are included, as well as of some soft parts which represents taxonomically important characters. Data related to geographic distribution, synonyms and records of the species in Brazil are also given.

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