subject:(salinities)

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Louisiana State University

1. Rybovich, Molly Marie. Growth and mortality of spat, seed, and market-sized oysters (Crassostrea virginica) in low salinities and high temperatures.

Degree: MS, Environmental Sciences, 2014, Louisiana State University

URL: etd-04072014-095955 ; https://digitalcommons.lsu.edu/gradschool_theses/3690

► Changes in the timing and interaction of seasonal high temperatures and low salinity as predicted by climate change models could dramatically alter oyster population dynamics.… (more)

▼ Changes in the timing and interaction of seasonal high temperatures and low salinity as predicted by climate change models could dramatically alter oyster population dynamics. Little is known explicitly about how low salinity and high temperature combinations affect spat (<25 mm), seed (26-75 mm), and market (>75 mm) oyster growth and mortality. Using lab and field studies, this project quantified the combined effects of extremely low salinities (< 5) and high temperatures (>30 °C) on growth and survival of spat, seed, and market-sized oysters. In 2012 and 2013, hatchery-produced oysters were placed in open and closed bags at three sites in Breton Sound, LA, along a salinity gradient which typically ranges from 5 to 20. Growth and mortality were recorded monthly. Regardless of size class, oysters at the lowest salinity site (annual mean = 4.8) experienced significantly higher mortality and lower growth than oysters located in higher salinity sites (annual means = 11.1 and 13.0); furthermore, all oysters in open bags at the two higher salinity sites experienced higher mortality, likely due to predation. To explicitly examine oyster responses to extreme low salinity and high temperature combinations, a series of laboratory experiments were conducted. Oysters were placed in 18 tanks in a fully crossed temperature (25 °C, 32 °C) by salinity (1, 5, 15) experiment with 3 replicates, and repeated twice for each oyster size class. Regardless of temperature, seed and market oysters held in low salinity tanks (salinity 1) experienced 100% mortality within seven days. In contrast, at salinity 5, temperature significantly affected the mortality rate; all size class oysters experienced > 50% mortality at 32 °C, and < 40% mortality at 25 °C. In higher salinity tanks (15), only market-sized oysters held at 32 °C experienced significant mortality (>60%). These experiments demonstrate that high water temperatures (> 30 °C) and low salinities (< 5) negatively impact oyster growth and survival, and that high temperatures alone may negatively impact market-sized oysters. It is critical to understand the potential impacts of climate and anthropogenic changes on oyster resources in order to better adapt and manage for long-term sustainability.

Subjects/Keywords: Crassostrea virginica; spat; seed; low salinities; high temperatures

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APA (6^th Edition):

Rybovich, M. M. (2014). Growth and mortality of spat, seed, and market-sized oysters (Crassostrea virginica) in low salinities and high temperatures. (Masters Thesis). Louisiana State University. Retrieved from etd-04072014-095955 ; https://digitalcommons.lsu.edu/gradschool_theses/3690

Chicago Manual of Style (16^th Edition):

Rybovich, Molly Marie. “Growth and mortality of spat, seed, and market-sized oysters (Crassostrea virginica) in low salinities and high temperatures.” 2014. Masters Thesis, Louisiana State University. Accessed January 21, 2021. etd-04072014-095955 ; https://digitalcommons.lsu.edu/gradschool_theses/3690.

MLA Handbook (7^th Edition):

Rybovich, Molly Marie. “Growth and mortality of spat, seed, and market-sized oysters (Crassostrea virginica) in low salinities and high temperatures.” 2014. Web. 21 Jan 2021.

Vancouver:

Rybovich MM. Growth and mortality of spat, seed, and market-sized oysters (Crassostrea virginica) in low salinities and high temperatures. [Internet] [Masters thesis]. Louisiana State University; 2014. [cited 2021 Jan 21]. Available from: etd-04072014-095955 ; https://digitalcommons.lsu.edu/gradschool_theses/3690.

Council of Science Editors:

Rybovich MM. Growth and mortality of spat, seed, and market-sized oysters (Crassostrea virginica) in low salinities and high temperatures. [Masters Thesis]. Louisiana State University; 2014. Available from: etd-04072014-095955 ; https://digitalcommons.lsu.edu/gradschool_theses/3690

2. Priyaja, P; Dr.Rosamma,Philip. Pyocyanin (5-methyl-1-hydroxyphenazine) produced by Pseudomonas aeruginosa as antagonist to vibrios in aquaculture: overexpression, downstream process and toxicity.

Degree: Marine Biology, Microbiology and Biochemistry School of Marine Sciences, 2012, Cochin University of Science and Technology

URL: http://dyuthi.cusat.ac.in/purl/3266

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Pyocyanin is a versatile and multifunctional phenazine, widely used as a bio-control agent. Besides its toxicity in higher concentration, it has been applied as bio-control… (more)

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Pyocyanin is a versatile and multifunctional phenazine, widely used as a bio-control agent. Besides its toxicity in higher concentration, it has been applied as bio-control agents against many pathogens including the Vibrio spp. in aquaculture systems. The exact mechanism of the production of pyocyanin in Pseudomonas aeruginosa is well known, but the genetic modification of pyocyanin biosynthetic pathways in P. aeruginosa is not yet experimented to improve the yield of pyocyanin production. In this context, one of the aims of this work was to improve the yield of pyocyanin production in P. aeruginosa by way of increasing the copy number of pyocyanin pathway genes and their over expression. The specific aims of this work encompasses firstly, the identification of probiotic effect of P. aeruginosa isolated from various ecological niches, the overexpression of pyocyanin biosynthetic genes, development of an appropriate downstream process for large scale production of pyocyanin and its application in aquaculture industries. In addition, this work intends to examine the toxicity of pyocyanin on various developmental stages of tiger shrimp (Penaeus monodon), Artemia nauplii, microbial consortia of nitrifying bioreactors (Packed Bed Bioreactor, PBBR and Stringed Bed Suspended Bioreactor, SBSBR) and in vitro cell culture systems from invertebrates and vertebrates. The present study was undertaken with a vision to manage the pathogenic vibrios in aquaculture through eco-friendly and sustainable management strategies with the following objectives: Identification of Pseudomonas isolated from various ecological niches and its antagonism to pathogenic vibrios in aquaculture.,Saline dependent production of pyocyanin in Pseudomonas aeruginosa originated from different ecological niches and their selective application in aquaculture,Cloning and overexpression of Phz genes encoding phenazine biosynthetic pathway for the enhanced production of pyocyanin in Pseudomonas aeruginosa MCCB117,Development of an appropriate downstream process for large scale production of pyocyanin from PA-pUCP-Phz++; Structural elucidation and functional analysis of the purified compoundToxicity of pyocyanin on various biological systems.

Cochin University of Science and Technology

Subjects/Keywords: Pseudomonads; Pseudomonas aeruginosa; Bacterial isolates; Phenotypic characterization; Antagonism to Vibrio harveyi at different salinities

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Priyaja, P. D. R. (2012). Pyocyanin (5-methyl-1-hydroxyphenazine) produced by Pseudomonas aeruginosa as antagonist to vibrios in aquaculture: overexpression, downstream process and toxicity. (Thesis). Cochin University of Science and Technology. Retrieved from http://dyuthi.cusat.ac.in/purl/3266

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Priyaja, P; Dr Rosamma,Philip. “Pyocyanin (5-methyl-1-hydroxyphenazine) produced by Pseudomonas aeruginosa as antagonist to vibrios in aquaculture: overexpression, downstream process and toxicity.” 2012. Thesis, Cochin University of Science and Technology. Accessed January 21, 2021. http://dyuthi.cusat.ac.in/purl/3266.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vancouver:

Priyaja PDR. Pyocyanin (5-methyl-1-hydroxyphenazine) produced by Pseudomonas aeruginosa as antagonist to vibrios in aquaculture: overexpression, downstream process and toxicity. [Internet] [Thesis]. Cochin University of Science and Technology; 2012. [cited 2021 Jan 21]. Available from: http://dyuthi.cusat.ac.in/purl/3266.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Priyaja PDR. Pyocyanin (5-methyl-1-hydroxyphenazine) produced by Pseudomonas aeruginosa as antagonist to vibrios in aquaculture: overexpression, downstream process and toxicity. [Thesis]. Cochin University of Science and Technology; 2012. Available from: http://dyuthi.cusat.ac.in/purl/3266

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

3. Kuo, Chin-Ching. Feasibility research of sewage disposal planning of initial stage of Stormwater of community's drainage system.

Degree: Master, Marine Environment and Engineering, 2007, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727107-183533

► This research is based on the plan and design of Datang constructed wetland as a storm water wetland system. Qantity of the discharges from Datan… (more)

▼ This research is based on the plan and design of Datang constructed wetland as a storm water wetland system. Qantity of the discharges from Datan community drainage system including its branches surround Dapeng Bay National Scenic Area are estimated. The objectives of this research is to study the possibilities of using the concept of stormwater wetland system for including the Datan constructed wetland and Lin-Bian right-bank wetland as flood detention wetland system and treatment wetlands during the dry season. Generally, flood detention ponds are not functioning except during storm seasons. Rainfall are mostly concentrated from June to September in southern Taiwan (mainly due to southwest monsoon and typhoon), the Datan wetland has therefore planned to treat the domestic sewages and the disposal from aquaculture farms during the dry season, and first flushing drainage during storm season. Besides the flood detention volume, Datan wetland has been designed into four major sections, a) primary settling for settle part of the suspended particles and aeration; b) bio-filtration through 2 sets of bio-filter using crushed bricks and oyster shells as filter media, mainly designed for BOD removal and partly early denitrification; c) followed by shallow weeds pond for reaeration and nutrients uptake by plantation; d) entering a series of open water ponds for stabilization. Landscape has been take good care for recreative function and habitat reserved for variety of birds. Due to the flood detention function will flood the basin few times a year, variable depth environment and plantations are designed. Wetland maintains ordinary water level at EL=-1.1m, maximum flood detention can go as high as EL=+1.5m. The wetland has effective surface approximately 5.5 ha., maximum flood detention quantity approximately 130,000 cubic meters. Since the area is tidally affected, influents contain different levels of salinities. Plantation becomes a difficult issue for the Datan wetland, due to the saline waters. Mangrove is the best choice, so far, for this situation. The mangrove forest has the richest productivity on wetland ecosystem, and can carry on the physical biology multistage degeneration to the sewage and absorb various pollutants. Hydraulic analysis estimates the peak discharge of Datan drainage systemâs 10 year flood frequency is 20.17cms, Datan constructed wetland and Linbian right bank constructed wetland can reduces the peak rate of 8.06cms and 4.38 cms, respectively. In addition, most of the branches of the Datan drainage system are thus achieve the ten year return period bench mark from the HEC-RAS evaluation The water quality monitoring results after one month of operation have shown the average elimination rates, TOC=-10%, BOD5=53%, TKN=71%, NH3-N=88%, NO3-N=65, NO2-N=90%, TN=70%, TP=52%, OP=56%, Chl.a=-61%, SS=4%, the turbidity (NTU)=70%. BOD and nutrients are shown effective reductions, while the SS and the chlorophyll-a are correlated mainly due to the plankton growth in the open waters. Long-term monitoring is… Advisors/Committee Members: Wen-Chien Kuo (chair), Chia-Shun Yu (committee member), Lei Yang (chair), Jimmy C. M. Kao (chair).

Subjects/Keywords: aquaculture farms; Flood detention ponds; Salinities constructed wetland; Nutrient

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kuo, C. (2007). Feasibility research of sewage disposal planning of initial stage of Stormwater of community's drainage system. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727107-183533

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kuo, Chin-Ching. “Feasibility research of sewage disposal planning of initial stage of Stormwater of community's drainage system.” 2007. Thesis, NSYSU. Accessed January 21, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727107-183533.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kuo, Chin-Ching. “Feasibility research of sewage disposal planning of initial stage of Stormwater of community's drainage system.” 2007. Web. 21 Jan 2021.

Vancouver:

Kuo C. Feasibility research of sewage disposal planning of initial stage of Stormwater of community's drainage system. [Internet] [Thesis]. NSYSU; 2007. [cited 2021 Jan 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727107-183533.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kuo C. Feasibility research of sewage disposal planning of initial stage of Stormwater of community's drainage system. [Thesis]. NSYSU; 2007. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727107-183533

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University

4. Meecham, Randy John. A Mineralogical and Fluid Inclusion Study of Massive Sulphide Samples from the Juan De Fuca Ridge, Northeast Pacific Ocean.

Degree: 1990, McMaster University

URL: http://hdl.handle.net/11375/19463

►

In the past decade, sites of hydrothermal activity along the Juan de Fuca Ridge have gained a growing amount of attention. Increased sampling has… (more)

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In the past decade, sites of hydrothermal activity along the Juan de Fuca Ridge have gained a growing amount of attention. Increased sampling has provided the materials for more detailed studies, including those collected from Axial Seamount, a large shield volcano on the central portion of the ridge. Axial Seamount is host to at least three active vent sites, one of which, along the northwest caldera wall, consists of recently active eruptive-fissures and nearby chimney-like spires. A sampled spire from this location and samples from other vent areas are described using reflected and transmitted light techniques. They have been found to consist of the sulphide phases sphalerite, wurtzite, pyrite, marcasite, chalcopyrite, isocubanite, and galena. Jordanite and tetrahedrite-tennanite are also known to precipitate at these vent sites, but were not observed here. The most dominant non-sulphide minerals are amorphous silica and barite. Native sulfur, Fe and Mn oxides and a variety of sulfosalts may also be present. The complex textures in these samples reflect precipitation and growth from higher temperature fluids that are mixing with local ambient seawater. Fluid inclusions in sphalerite have revealed salinities in the 5.6 to 7.0 weight % NaCl range, with homogenization temperatures ranging from 214.8°C to 269.4°C. Temperatures of homogenization require pressure-corrections between approximately 9.0°C and 13.0°C, to set-up a range of trapping temperatures that lie between 211.8°C and 279.4°C. Fluid inclusions are also found in wurtzite, barite, and amorphous silica however, these would yield no data. Middle Valley is a sedimented rift valley that lies at the extreme north end of the Juan de Fuca Ridge. A number of hydrothermal sulphide mounds that lie atop the sediment pile have been sampled. The mineralogy is similar to that at Axial Seamount; however, the dominant sulphide phase at Middle Valley is pyrrhotite. Textural differences between the two sites are significant, a result of the traversing of hydrothermal fluids through a thick package of hemepelagic sediment at Middle Valley. Samples from Middle Valley are found to contain no measurable fluid inclusions in the sections available for study. Mineralogical and fluid inclusion studies are important methods that can be used to help solve the complex growth history of sulfides that are and have been accumulating at mid-ocean ridge vent sites.

Thesis

Bachelor of Science (BSc)

Advisors/Committee Members: Crocket, J. H., Geology.

Subjects/Keywords: mineralogical; fluid; inclusion; study; massive sulphide; samples; hydrothermal; salinities

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Meecham, R. J. (1990). A Mineralogical and Fluid Inclusion Study of Massive Sulphide Samples from the Juan De Fuca Ridge, Northeast Pacific Ocean. (Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/19463

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Meecham, Randy John. “A Mineralogical and Fluid Inclusion Study of Massive Sulphide Samples from the Juan De Fuca Ridge, Northeast Pacific Ocean.” 1990. Thesis, McMaster University. Accessed January 21, 2021. http://hdl.handle.net/11375/19463.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Meecham, Randy John. “A Mineralogical and Fluid Inclusion Study of Massive Sulphide Samples from the Juan De Fuca Ridge, Northeast Pacific Ocean.” 1990. Web. 21 Jan 2021.

Vancouver:

Meecham RJ. A Mineralogical and Fluid Inclusion Study of Massive Sulphide Samples from the Juan De Fuca Ridge, Northeast Pacific Ocean. [Internet] [Thesis]. McMaster University; 1990. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/11375/19463.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Meecham RJ. A Mineralogical and Fluid Inclusion Study of Massive Sulphide Samples from the Juan De Fuca Ridge, Northeast Pacific Ocean. [Thesis]. McMaster University; 1990. Available from: http://hdl.handle.net/11375/19463

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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