Log in

Relevant bibliographies by topics / Environmental Sciences|Agriculture, Fisheries and Aquaculture|Biology, Limnology / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Environmental Sciences|Agriculture, Fisheries and Aquaculture|Biology, Limnology.

Dissertations / Theses on the topic 'Environmental Sciences|Agriculture, Fisheries and Aquaculture|Biology, Limnology'

Author: Grafiati

Published: 9 July 2021

Last updated: 29 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 16 dissertations / theses for your research on the topic 'Environmental Sciences|Agriculture, Fisheries and Aquaculture|Biology, Limnology.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Eitzmann, Jeffrey Laine. "Spatial habitat variation in a Great Plains river : effects on the fish assemblage and food web structure." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/557.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Edwards, Patrick Michael. "Macroinvertebrates and Excessive Fine Sediment Conditions in Oregon Coastal Streams." Thesis, Portland State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3629266.

Full text

Abstract:

<p>The Pacific Coastal ecoregion contains large tracts of economically important forestlands that also serve as critical stream habitat for endangered Salmonids. Excessive fine sediment deposition in streams of this region is a major environmental concern in the region but difficult to measure directly. The use of stream invertebrates to monitor fine sediment conditions in streams requires careful consideration of several important factors that complicate their use as bioindicators including high spatial and temporal variability and covariance with other environmental variables. </p><p> To e

APA, Harvard, Vancouver, ISO, and other styles

3

Al-Reasi, Hassan Ali. "Tracking mercury biomagnification in fish from the Gulf of Oman using stable isotopes (carbon-13carbon-12 and nitrogen-15nitrogen-14)." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26836.

Full text

Abstract:

Attempts to use stable isotope carbon (delta13C) and nitrogen (delta15N) ratios to construct trophic positions and track mercury biomagnification in zooplankton and 13 fish species from a coastal food web of the Gulf of Oman illustrated some potential differences in this environment compared to the aquatic ecosystem of the northern hemisphere. Due to the large difference in delta13C values (3.4&permil;) between zooplankton planktivorous fish species (S. crumenophthalmus, S. longiceps and R. kanagurta), zooplankton would seem to not be the primary diet of these fish species as commonly describe

APA, Harvard, Vancouver, ISO, and other styles

4

Nwobu, Ogochukwu L. "Methylmercury uptake and bioconcentration by the freshwater green alga Pseudokirchineriella subcapitata." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/26997.

Full text

Abstract:

Methylmercury (MeHg) enters most aquatic food webs primarily at the phytoplankton level. However, in the complex aquatic ecosystem, it is difficult to fully examine specific pathways. Consequently, in this study, the uptake of environmentally realistic levels of added MeHg concentrations (0.21 to 20 ng Hg L-1 ) by the freshwater green alga Pseudokirchniriella subcapitata grown in batch and semi-continuous cultures at biomass levels of (0.03, 0.15, 0.3 and 3 mg (dw) L-1) was investigated. In algal culture media without dissolved organic carbon (DOC) and in river water samples with DOC concentr

APA, Harvard, Vancouver, ISO, and other styles

5

Webster, Sarah R. "Size-at-age and diet composition of Pacific halibut ( Hippoglossus stenolepis) in Cook Inlet, Alaska." Thesis, Alaska Pacific University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1571557.

Full text

Abstract:

<p> Since the 1970s halibut size-at-age has decreased in southcentral Alaska; the mechanisms causing decreased size-at-age are unknown. The objectives of this study were to 1) compare size-at-age of port-sampled fish in Homer to survey samples from Gulf of Alaska; 2) assess stable isotope values (δ<sup> 13</sup>C, δ<sup>15</sup>N) of halibut by sex, size, location and date; 3) determine mean stable isotope values for prey; and 4) identify prey associated with smaller and larger size-at-age. We used port-sampled halibut from the Homer sport fishery due to the quantity of available

APA, Harvard, Vancouver, ISO, and other styles

6

Torre, Cosio Jorge. "Inventory, monitoring and impact assessment of marine biodiversity in the Seri Indian territory, Gulf of California, Mexico." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/280215.

Full text

Abstract:

The conservation of marine ecosystems is at least 20 years behind terrestrial and freshwater ecosystems due to the difficulties in studying and monitoring these dynamic and complex environments. Furthermore, marine environment receive less attention because human impacts are less visible in the sea, and oceans are viewed as global commons. The purpose of the present dissertation is to contribute to the knowledge of marine conservation through the development of three components in natural resources management: inventory, monitoring, and assessment of impacts. I elaborate a multi-taxa inventory

APA, Harvard, Vancouver, ISO, and other styles

7

Nichols, Wallace J. "Biology and conservation of sea turtles in Baja California, Mexico." Diss., The University of Arizona, 2003. http://hdl.handle.net/10150/280439.

Full text

Abstract:

I studied the in-water anthropogenic impacts on sea turtles, origins of sea turtles on foraging and developmental areas, their migration routes, and described regionally appropriate conservation needs. Sea turtles inhabiting Baja California waters originate on distant beaches in Japan, Hawaii, and southern Mexico. Results from genetic analyses, flipper tagging and satellite telemetry indicate loggerhead turtles (Caretta caretta) feeding along Baja California's coast are born in Japan and make a transpacific developmental migration of more than 20,000 km, encompassing the entire North Pacific O

APA, Harvard, Vancouver, ISO, and other styles

8

Cudney-, Bueno Richard. "Management and conservation of benthic resources harvested by small-scale hookah divers in the northern Gulf of California, Mexico: The black murex snail fishery." Thesis, The University of Arizona, 2000. http://hdl.handle.net/10150/278734.

Full text

Abstract:

I conducted a management assessment for the conservation of benthic resources harvested by small-scale hookah divers in the northern Gulf of California (NG), Mexico, and analyzed the reproductive ecology of the black murex snail. Open access to the fisheries, combined with national and international market pressure, fishing methods, and the timing of fishing activities have caused an evident decline in production, the use of new fishing zones, and a shift of fishing effort towards deeper areas. However, the organization of the diving sector and its initiatives to establish forms of regulation

APA, Harvard, Vancouver, ISO, and other styles

9

Zemel, Hayley L. "Initial characterization of a disrupted stress endocrine system in shiner perch of San Francisco Bay---possible relation to environmental contaminant exposures and interrenal protein expression." Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1527426.

Full text

Abstract:

<p>Aquatic environments adjacent to industrialized urban centers typically contain anthropogenic chemicals that may cause disruption of endocrine systems and physiological functions. This study investigated whether sites within San Francisco Bay are associated with endocrine disruption in the indigenous fish, shiner perch. The endocrine system that produces cortisol was tested, since it is critical for physiological regulation of stress response, metabolism, immune function and osmoregulation. The cortisol-producing tissue, the interrenal, was also investigated using proteomics technologies to

APA, Harvard, Vancouver, ISO, and other styles

10

Estey, Chelsie M. "The characterization of 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCoAR) in rainbow trout (Oncorhynchus mykiss) and the effect of statin drugs on HMGCoAR." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27454.

Full text

Abstract:

The presence of pharmaceuticals in the aquatic environment is a growing area of concern. The objective of this thesis was to examine the effects of statin drugs, a class of pharmaceuticals prescribed to lower endogenous cholesterol production by inhibiting 3-hydroxy-3-methylglutaryl coenzyme A reductase (HMGCoAR), in the rainbow trout Oncorhynchus mykiss. The study also aimed to provide some insight into mechanisms governing the control of HMGCoAR in fish. Two statin drugs were used in this study, cerivastatin (CVT) and atorvastatin (AVT). Cerivastatin inhibited hepatic microsomal and brain ho

APA, Harvard, Vancouver, ISO, and other styles

11

Negrey, John Patrick. "The effect of dietary methylmercury on Na+,K+-ATPase activity and growth in fall-run chinook salmon (O. tshawytscha) from California's Central Valley." Thesis, San Jose State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1552274.

Full text

Abstract:

<p>Hatchery reared Chinook salmon from California’s Central Valley were fed for 67 days (Apr-Jun, 2008) on fish pellets mixed with either 0, 1, 3, or 5 µg·g<sup>−1</sup> methylmercury hydroxide. Weight, fork length, condition factor, and Na<sup>+</sup>,K<sup>+</sup>-ATPase measurements were determined every two weeks and a 96-h seawater challenge was conducted at the conclusion of the experiment. </p><p> Results from two-way ANOVA, with treatment and date as independent variables, indicated no significant differences for weight (F<sub>3,32</sub> = 1.38; P = 0.280), l

APA, Harvard, Vancouver, ISO, and other styles

12

Duerr, Adam Edward. "Abundance of lost and discarded fishing tackle and implications for waterbird populations in the United States." Thesis, The University of Arizona, 1999. http://hdl.handle.net/10150/278698.

Full text

Abstract:

Waterbirds have died of lead poisoning from ingesting lead sinkers in the United States and Europe. Other tackle and litter has also caused injury and mortality to waterbirds. Despite risks posed to waterbirds, no studies of the abundance of tackle or litter in freshwater systems of the United States have been completed. We tested the effectiveness of a metal detector to search for lost and discarded tackle, and developed a technique to correct densities of sinkers. We then quantified tackle and litter abundance at various sites around the United States. Tackle and litter densities varied amon

APA, Harvard, Vancouver, ISO, and other styles

13

Schloesser, Joshua Thomas. "Large river fish community sampling strategies and fish associations to engineered and natural river channel structures." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/888.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Bouska, Wesley Wade. "Road crossing designs and their impact on fish assemblages and geomorphology of Great Plains streams." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/1084.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

"Ah receptor action in developing zebrafish (Danio rerio)." Tulane University, 1999.

Find full text

Abstract:

The aryl hydrocarbon receptor (AhR) mediates toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), a contaminant found ubiquitously in the environment. Teratogenic and carcinogenic activities of TCDD are well documented, however, little is known about the molecular basis of these actions. A transgenic zebrafish was developed that expressed green fluorescent protein (GFP) in the presence of AhR ligands. The time at which embryos were exposed to TCDD was critical to their survival. Exposure during the first 24 hours of development resulted in 100% mortality by 10 days post-fertilization, compa

APA, Harvard, Vancouver, ISO, and other styles

16

"Spatial and temporal variation in feeding preferences of top predatory fishes in a contaminated wetland ecosystem." Tulane University, 2003.

Find full text

Abstract:

The Bayou LaBranche wetland system, located 22 miles west of New Orleans, LA, received wastewaters from Norco oil refinery from 1920 to 1995. In 1989, the sediment of one of the waterways, Bayou Trepagnier, was designated contaminated with Pb, Cr, Zn, and polycyclic aromatic hydrocarbons. In 1995, the wastewaters were diverted to the Mississippi River, taking with them the main source of fresh water for the system. After seven years of diversion, it is unclear whether contaminants or a loss of significant freshwater input has been more harmful to organisms in this system, or if the organisms h

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!