• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 6
  • 5
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • Tagged with
  • 18
  • 11
  • 6
  • 5
  • 5
  • 4
  • 3
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • 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

Ecology of three species of Euchaeta (copepoda: calanoida) in the coastal waters of Hong Kong.

January 2008 (has links)
Yau, Yee Wa Eva. / Thesis submitted in: October 2007. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 113-126). / Abstracts in English and Chinese. / Abstract (in English) --- p.i / Abstract (in Chinese) --- p.iv / Acknowledgment --- p.vi / Table of content --- p.vii / List of Figures --- p.x / List of Tables --- p.xiii / Chapter Chapter 1 --- General Introduction --- p.1 / Chapter 1.1 --- Copepod and its ecological importance --- p.1 / Chapter 1.2 --- General biology of copepod --- p.1 / Chapter 1.3 --- Hydrography of Hong Kong --- p.6 / Chapter 1.4 --- Copepods in Hong Kong´ةs waters --- p.7 / Chapter 1.5 --- Diel vertical migration (DVM) --- p.12 / Chapter 1.6 --- Thesis content --- p.13 / Chapter Chapter 2 --- Distribution and Population Dynamics of Euchaeta Species in the Coastal Waters of Eastern Hong Kong --- p.14 / Chapter 2.1 --- Introduction --- p.14 / Chapter 2.1.1 --- Diversity of Euchaeta along the Chinese waters --- p.14 / Chapter 2.1.2 --- Seasonal occurrence of Euchaeta --- p.17 / Chapter 2.1.3 --- Study area --- p.19 / Chapter 2.1.4 --- Objectives of study --- p.22 / Chapter 2.2 --- Materials and Methods --- p.23 / Chapter 2.2.1 --- Field sampling --- p.23 / Chapter 2.2.2 --- Laboratory analysis --- p.25 / Chapter 2.2.3 --- Data analysis --- p.25 / Chapter 2.3 --- Results --- p.27 / Chapter 2.3.1 --- Hydrography --- p.27 / Chapter 2.3.2 --- Species diversity --- p.34 / Chapter 2.3.3 --- Spatial distribution --- p.34 / Chapter 2.3.4 --- Seasonal occurrence --- p.37 / Chapter 2.4 --- Discussion --- p.47 / Chapter 2.4.1 --- Diversity of Euchaeta --- p.47 / Chapter 2.4.2 --- Seasonality in occurrence of Euchaeta --- p.49 / Chapter 2.4.3 --- Water movement and Euchaeta populations --- p.50 / Chapter 2.4.4 --- Euchaeta populations in Tolo Habour and Mirs Bay --- p.52 / Chapter 2.5 --- Conclusions --- p.58 / Chapter Chapter 3 --- Diel Vertical Distribution and Feeding Activities of Euchaeta concinna in Mirs Bay --- p.60 / Chapter 3.1 --- Introduction --- p.60 / Chapter 3.1.1 --- Diel vertical migration (DVM) --- p.60 / Chapter 3.1.2 --- Diel feeding rhythm --- p.62 / Chapter 3.1.3 --- Dietary composition and prey selectivity --- p.64 / Chapter 3.1.4 --- Predation impact --- p.66 / Chapter 3.1.5 --- Study area --- p.67 / Chapter 3.1.6 --- Objectives of study --- p.68 / Chapter 3.2 --- Materials and Methods --- p.69 / Chapter 3.2.1 --- Field sampling --- p.69 / Chapter 3.2.2 --- Laboratory analysis --- p.70 / Chapter 3.2.3 --- Laboratory feeding experiment --- p.71 / Chapter 3.2.4 --- Data analysis --- p.73 / Chapter 3.3 --- Results --- p.76 / Chapter 3.3.1 --- Hydrography --- p.76 / Chapter 3.3.2 --- Density of Euchaeta concinna --- p.76 / Chapter 3.3.3 --- Diel vertical distribution --- p.79 / Chapter 3.3.4 --- Diel feeding rhythm --- p.85 / Chapter 3.3.5 --- Dietary composition and prey selectivity --- p.87 / Chapter 3.3.6 --- Prey availability --- p.87 / Chapter 3.3.7 --- Feeding in laboratory --- p.94 / Chapter 3.3.8 --- Predation impact --- p.94 / Chapter 3.4 --- Discussion --- p.99 / Chapter 3.4.1 --- Diel vertical distribution and diel feeding rhythm --- p.99 / Chapter 3.4.2 --- Prey composition and selectivity --- p.102 / Chapter 3.4.3 --- Digestion time and feeding rate --- p.105 / Chapter 3.4.4 --- Predation impact --- p.106 / Chapter 3.5 --- Conclusions --- p.109 / Chapter Chapter 4 --- Conclusions --- p.110 / References --- p.113 / Appendices --- p.127
2

Population dynamics and cohort persistence of Acartia californiensis (Copepoda:Calanoida) in Yaquina Bay, Oregon

Johnson, John Kenneth 23 May 1980 (has links)
Graduation date: 1981 / Best scan available for figures. Original is a photocopy.
3

Population dynamics of the Calanoid copepod, Bestiolina similis, in small scale cultures

VanderLugt, Kyle R January 2007 (has links)
Thesis (M.S.)--University of Hawaii at Manoa, 2007. / Includes bibliographical references (leaves 68-69). / ii, 80 leaves, bound ill. 29 cm
4

Ecological, biomechanical and neurological correlates of escape behavior in calanoid copepods

Waggett, Rebecca Jane, Buskey, Edward Joseph, January 2005 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisor: Edward J. Buskey. Vita. Includes bibliographical references.
5

The distribution of the life history stages of Calanus plumchrus Marukawa (Copepoda : Calanoida) in the Strait of Georgia

Gardner, Grant A. January 1972 (has links)
The relationship between Calanus plumchrus and hydrographic parameters has been investigated. The copepod is associated with Strait of Georgia bottom water from July to January. This association is not found in the early developmental stages, which are present from February to July and are most commonly in near surface waters. The onset of maturation and breeding precedes the spring phytoplankton bloom; some environmental parameters appear to function as cues to this timing. The nature of these cues is not clear; no single parameter would seem to be capable of producing the observed effect. C. plumchrus overwinters in a state of arrested development similar to diapause. / Science, Faculty of / Zoology, Department of / Graduate
6

Ecological, biomechanical and neurological correlates of escape behavior in calanoid copepods

Waggett, Rebecca Jane 28 August 2008 (has links)
Not available / text
7

The annual cycle of certain calanoid species in West Greenland.

Maclellan, Delphine C. January 1964 (has links)
The West Greenland coast is a typical fjord region with a considerable development of local deepwater basins. The majority of the West Greenland fjords are of the typcial bottom configuration, with a well-developed threshold at the mouth, which normally rises to within 100 or 200 m of the surface. Such a fjord has been named an "Arctic" type fjord by Stephensen (1916), because the bottom water is arctic in character, having a negative temperature and low salinity. Ameralik fjord (Latitude 64o 3' N., Longitude 52o 30' W.) (map) is in this category. [...]
8

The annual cycle of certain calanoid species in West Greenland.

Maclellan, Delphine C. January 1964 (has links)
No description available.
9

The freshwater Diaptomidae (Calanoida : Copepoda) of Southern Africa.

Rayner, Nancy Alison. 06 June 2014 (has links)
Freshwater copepod taxonomy has been neglected in southern Africa for more than 50 years and this has placed a constraint on research on the biology and ecology of this important component of the freshwater invertebrate fauna. In this review of the calanoid family Diaptomidae of southern Africa, keys to the freshwater families, the African genera and southern African species are presented as well as diagnoses of the family Diaptomidae and the subfamilies Paradiaptominae and Diaptominae. The genus Lovenula has been revised. All available information on each species has been collated. This includes illustrations of the most important identifying characters, synonymies, a record of material examined and a map of distribution. The discovery of 11 new species, four Paradiaptomus, two, Metadiaptomus and five Tropodiaptomus, indicates that the diaptomid fauna of southern Africa is more diverse than was previously envisaged. Biogeography and evolution of the group is discussed with reference to vicariance, dispersal and palaeoenvironments of the African continent. The Paradiaptominae (Lovenula, Paradiaptomus and Metadiaptomus) are endemic to Africa, while the Diaptominae have one endemic African genus Thermodiaptomus and the other, Tropodiaptomus, is not limited to the African continent. The latter genus has speciated throughout the warmer regions of Africa, with more than 30 described species. Additional collections from isolated regions will, without doubt, substantially increase this number. Included in the account is a glossary of copepod terminology, an explanation of local limnological terms in current use, and a gazetteer. Biographical information on the pioneers of copepod research in southern Africa is included. / Thesis (Ph.D.)-University of Natal, Pietermaritzburg, 1990.
10

Análise da distribuição, densidade e diversidade de Copepoda Calanoida e Cyclopoida nos reservatórios e tributários do Médio e Baixo Rio Tietê e sua relação com as características limnológicas do sistema / Analysis of distribution, density and diversity of Copepoda Calanoida and Cyclopoida in Medium and Low Tietê river reservoirs and tributaries and its relationship with limnological characteristics of the system

Pereira, Ricardo Henrique Gentil 25 April 2003 (has links)
Este projeto de pesquisa foi desenvolvido nos reservatórios e tributários do Médio e Baixo rio Tietê, São Paulo, com o objetivo de avaliar a composição, distribuição e densidade das espécies de Copepoda Calanoida e Cyclopoida e sua relação com a disposição dos reservatórios construídos em série (cascata), os quais apresentam diferenças na morfometria, período e área de inundação, grau de trofia (relacionando aos usos e ocupação da bacia hidrográfica), vazão e tempo de residência da água. Para tanto, foram realizadas coletas nos reservatórios e tributários nos meses de fevereiro, maio, julho e outubro/2000, quantificando as principais variáveis físicas, químicas e biológicas, além da análise qualitativa e quantitativa do zooplâncton, com ênfase em Copepoda Calanoida e Cyclopoida. Os resultados demonstram que apesar de ser verificada a melhoria da qualidade da água nos reservatórios a jusante, ainda ocorrem contribuições pontuais via tributários e difusas pelas atividades desenvolvidas na bacia hidrográfica, aumentando a concentração das formas nitrogenadas e fosfatadas, influenciando diretamente nas condições tróficas dos reservatórios e, conseqüentemente, na composição, densidade e distribuição das populações planctônicas. Os reservatórios classificam-se como eutróficos ou mesotróficos (dependendo da sua localização no rio Tietê e da sazonalidade) e os rios como eutróficos, principalmente em decorrência das elevadas concentrações de fósforo e clorofila.Em relação à comunidade zooplanctônica, os Copepoda e Rotifera foram mais abundantes, com uma variação espacial e sazonal relacionada às condições tróficas e temperatura, bem como aos mecanismos diferenciados do controle operacional das barragens (vazão e tempo de residência da água). As espécies de Copepoda encontradas no sistema foram Notodiaptomus iheringi, Notodiaptomus evaldus, Notodiaptomus deitersi, Argyrodiaptomus azevedoi Thermocyclops decipiens, ) Thermocyclops minutus, Thermocyclops inversus, Mesocyclops longisetus, Mesocyclops brasilianus, Mesocyclops meridianus, Mesocyclops ogunus, Acanthocyclops ogunus e Paracyclops chiltoni, sendo N. iheringi, N. evaldus, T. decipiens e T. minutus as espécies dominantes, com diferenças na distribuição e abundância em função dos locais de amostragem (tributários ou reservatórios) e período de coleta (sazonalidade). / This research project was developed in Tietê River reservoirs and tributaries, São Paulo, Brazil, aiming to evaluate the composition, distribution and density of Copepoda Calanoida and Cyclopoida species and its relationship with reservoirs disposition in Tietê River, built in series (cascade), which present differences in morphometry, flood period and area, trophic level (related to the hydrographic basin uses and occupation), discharge and water residence time. For that, collections were accomplished in reservoirs and tributaries on February, May, July and October/2000, quantifying the main physical, chemical and biological variables, besides qualitative and quantitative zooplankton analysis, with emphasis in Copepoda Calanoida and Cyclopoida. Results demonstrate that, in spite of the improvement of water quality verified downstream reservoirs, it still happen punctual tributary contributions, diffused due to activities developed in the hydrographic basin, increasing nitrogenous and phosphate forms concentration, influencing directly the reservoir trophic conditions and, consequently, composition of species, density and distribution. Reservoirs are classified as eutrophic or mesotrophic (depending on its location in Tietê River and sazonality) and the rivers as eutrophic, due mainly to the high phosphorus and chlorophyll concentrations. In relation to the zooplankton community, Copepoda and Rotifera were the most abundant, with spacial and seasonal variationrelated to trophic conditions and temperature, as well as to the barrier differentiated operational control mechanisms (discharge and water residence time). The Copepoda species found in the system were Notodiaptomus iheringi, Notodiaptomus evaldus, Notodiaptomus deitersi, Argyrodiaptomus azevedoi, Thermocyclops decipiens, Thermocyclops minutus, Thermocyclops inversus, Mesocyclops longisetus, Mesocyclops brasilianus, Mesocyclops meridianus, Mesocyclops ogunus, Acanthocyclops ogunus and Paracyclops chiltoni; being N. iheringi, N. evaldus, T. decipiens and T. minutus the dominant species, with differences in the distribution and abundance in function of the sampling places (tributaries or reservoirs) and collection period (sazonality).

Page generated in 0.0474 seconds