571 |
Die bodenfauna des St. Moritzer-Sees eine monographische studie ...Borner, Louis, January 1917 (has links)
Inaug.-diss.--Basel. / Curriculum vitae. "Literaturverzeichnis": p. [154]-163.
|
572 |
Nutritional composition of aquatic species in Laotian rice field ecosystems : possible impact of reduced biodiversity /Nurhasan, Mulia. January 2008 (has links) (PDF)
Master's thesis. / Format: PDF. Bibl.
|
573 |
Correspondence between aquatic ecoregions and the distribution of fish communities of eastern OklahomaHowell, Charles E., January 2001 (has links)
Thesis (M.S.)--University of North Texas, 2001. / Title from PDF title page (viewed on Dec. 9, 2004). Includes bibliographical references (p. 51-57).
|
574 |
A new apex predator in the gulf of Maine? Large, mobile crabs (Cancer Borealis) control benthic community structure /Leland, Amanda V., 1976- January 2002 (has links)
Thesis (M.S.) in Marine Biology--University of Maine, 2002. / Includes vita. Bibliography: leaves 61-69.
|
575 |
Miljögiftsförekomster i utter (Lutra lutra) från Småland : Nuvarande status och förändringar över tid (1966-2014) / Environmental contaminants in otter (Lutra lutra) in Småland : Present levels and temporal changes (1966-2014)Lorentzdotter, Helena January 2015 (has links)
The Swedish otter (Lutra lutra) population decreased markedly after the 1950’s and was considered to be seriously threatened for decades. Pollution from industries and other anthropogenic activities were suspected to be the major cause of the decline. The otter is a top-predator in aquatic systems and therefore particularly susceptible to bioaccumulative and toxic substances. For this reason, the species can be regarded as a valuable indicator of environmental health. Today, the Swedish otter population is increasing and has been reestablished in many areas. However, the otter is still missing in some regions of Sweden, especially in the southeast. The aim of this study was to investigate past and present levels, and temporal trends, of environmental contaminants in otters from Småland.The study is based on data of environmental contaminants in liver and muscle tissue from dead otters found in Småland during 1966-2014. I found that the perfluorinated compounds PFOS and PFOA have increased in otters since the 1970’s which is alarming and should be given special concern in future monitoring. Also, while mercury (Hg) is rather stable, selenium (Se) concentrations are decreasing, resulting in Hg exceeding Se on molar mass basis in several otters. This indicates that all of the available Se is bound to mercury, which may imply that the otters are vulnerable to additional Hg contamination. My conclusions are that the present concentrations of the studied environmental contaminants have probably not affected the otter population in general. However, otters may be exposed to toxic levels of some contaminants in certain areas that are more polluted from anthropogenic activities. This could be harmful to individual otters or their reproduction, and therefore, continued monitoring is highly relevant.
|
576 |
Hydrodynamics of flow-vegetation interactions at the scales of individual plant and plant patchSiniscalchi, Fabio January 2012 (has links)
No description available.
|
577 |
Indoor aqua sports centre梁人強, Liang, Yan-keung. January 1994 (has links)
published_or_final_version / Architecture / Master / Master of Architecture
|
578 |
Vulnerabiity of Tilapia zilii fry to bluegill predationBickerstaff, Wesley Bert January 1981 (has links)
No description available.
|
579 |
Growth of Tilapia zillii (Gervais) fed nonpreferred aquatic plantsSaeed, Mohamed Osman January 1979 (has links)
No description available.
|
580 |
The effects of electricity on some aquatic invertebratesMesick, Carl Frederick January 1979 (has links)
No description available.
|
Page generated in 0.0161 seconds