Aquatic ecology

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  • Shrimp Aquaculture Temperature, salinity and dissolved oxygen After extensive studies, several authors have mentioned certain physical, chemical and biological parameters of water and sediment as important for the aquaculture of marine shrimps. Along with dissolved oxygen, water temperature and salinity are considered as significant parameters because of their close association in aquatic ecosystem (OSPAR, 2005). The maximum water temperature recommended by Nunes et al., 2005 and ABBC, 2005 was 32°C, though the lower limit recommended by them varied slightly. Boyd (1990) suggests that 28-30°C is essential for the shrimp aquaculture. However, the optimal level mentioned by Chávez (2009) was 18° to 33°C. Water temperature along with salinity is dependent…

    Words: 1007 - Pages: 5
  • Solubility Research Paper

    Ecological impacts of the pollution on local environment. Eutrophication: Eutrophication is rapid growth of phytoplankton and other aquatic organism in aquatic environment in response to excess addition of nutrients such as nitrogen and phosphorus. Eutrophication can be caused by natural or cultural processes. Natural eutrophication occurs naturally when a lake or stream ages over a century or thousands of years, while cultural eutrophication is anthropogenic in nature. Eutrophication cause in…

    Words: 713 - Pages: 3
  • Lack Clean Water In Developing Countries

    on streets and sidewalks, and most importantly fertilizer from gardens. Water pollution is caused by animal and human feces, urban runoff, chemical spills, and the over-application of fertilizer. Fertilizer contains phosphorus and once phosphorus comes into contact with water, the health of the entire aquatic ecosystem is affected. An overabundance of phosphorus will create an algae bloom, where a rapid increase in algae population accumulates in the water. Once the algae die, harmful…

    Words: 809 - Pages: 4
  • Spatial Variability In Plankton Communities

    Spatial variability in local plankton communities can have large effects on the composition and diversity of the secondary production with in an area. Therefore, it is important for scientists to study the factors that affect plankton community’s abundance, diversity and dominance. In this study multiple physical and biological factors were observed in order to examine how surface plankton communities varied with distance from shore in the nearshore environment of the Southern California Bight.…

    Words: 1736 - Pages: 7
  • Fishing In China

    Thesis: China’s industrial waste practices and fishing methods have led to a negative impact in the world’s aquatic ecosystem. Abstract. Despite China’s major economic and technological advances, the country is being faced with a threatening reality of toxic polluted water that negatively impacts the welfare of both its aquatic life, as well as, the water throughout the world. Through its economic advances, China has also created an overwhelming technique of mass fishing, to feed the global…

    Words: 1253 - Pages: 6
  • Nitrates In Water Research Paper

    important factor to stream testing is the temperature of the water. If the temperature increases the amount of dissolved oxygen decreases. (EPA and Staff, 2012)Phosphates are present in the water through human and animal wastes. (Oram, no date) Phosphates are used in laundry soaps, cleaners, industrial effluents, and fertilizers. (Oram, no date) Nitrates are used in fertilizers, rodenticides, and food preservatives.Turbidity is caused by sediment or other pollutants and causes the water to…

    Words: 1096 - Pages: 5
  • Duckweed Hypothesis

    Proposal Background Duckweed also know as Lemna by her genus is a small plant, that is mostly found in sub-polar and tropics regions in ditches, ponds, lakes and slow flow-flowing rivers. Duckweed have the main function of remove waste of water, however the main problem is that grows fast (Moss et al.2012). Research Question Is the use of different concentrations of phosphates will affect the duckweed? Hypothesis The more phosphate use the more the plant will be affected. Aim To…

    Words: 983 - Pages: 4
  • Environmental Parameters Vs. Plankton Incidents

    Environmental parameters Vs Plankton Incidents: The graphs presented in figureX to figureX, environmental parameters observed at different sites in each area are presented area wise along with the harmful plankton incidents observed. Average temperature, dissolved oxygen and salinity observed each day at each farm site is used to plot these graphs. There has been a notion that with drop in salinity, which means freshwater run off, there would be increase in nutrients and supporting higher…

    Words: 1253 - Pages: 5
  • River Flow Alteration Essay

    regimes on a regional and global scale to understand the hydrologic magnitude, frequency, and timing of flow to develop general guiding principles for management. The development of flow assessment methodologies is used for prescribing environmental flow requirements. Environmental flow regimes in streams and rivers are the primary determinant of the structure and function of aquatic and riparian ecosystems (Poff et al., 1997; Hart and Finelli, 1999; Bunn and Arthington, 2002). Environmental…

    Words: 1226 - Pages: 5
  • Importance Of Gut Content Analysis Of Fish

    behaviour, condition, habitat use, energy intake and inter/intra specific interactions, etc. Accurate description of fish diets and feeding habits also provides the basis for understanding trophic interactions in aquatic food webs. Conceptually, trophic relations of fishes begin with foods and feeding behaviour of individuals or species. Diet composition analysis can be used to evaluate effects of ontogeny, or the establishment of exotic species (Gelwick & Matthews 2006; Chipps & Garvey 2007).…

    Words: 837 - Pages: 4
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