On the second day of incubation, the plate was removed from the incubator and placed over a hot plate heating Iodine solids. The smoke of the Iodine stained the plate to display the presence or absence of a halo around the bacteria 2.12 Lipid Hydrolysis This test was done by making a single line streak inoculation on a tributyrin agar plate and allowing incubation. After the incubation period, the plate was observed for the presence or absence of a halo around the bacteria. 2.13 Gelatin Liquefaction A gelatin deep was deep stabbed and incubated. After incubation the tubes were placed in 4ºC for 30 minutes.
When the population of planktivorous fishes increases and there is no predation refuge (e.g., oxygenated hypolimnion) for large-bodied zooplankton, less efficient small-bodied zooplankton grazers (e.g., rotifers and herbivorous copepods) typically dominate zooplankton communities, thus allowing for the overgrowth of phytoplankton. Various previous studies have proven the strong connection in relation to the size structure of zooplankton communities and phytoplankton abundance. Collected data implies that predatory forces serve important roles in aquatic communities and ecosystems. To add on, biomanipulation on water effects normally lasts for a short period of time. (i.e., weeks to months), most obvious in small, easily-managed systems, and impacted by resource availability, namely phosphorus and nitrogen (Benndorf 1990; Carpenter et al.
Decomposition of Leaf Litter in Aquatic System Name: Aisha Ali Ahmed Al-Khan ID:90165 ----------------------------------------------------------------------------------------- Introduction Leaf litter is important for many organisms. It provides nesting materials, microhabitat for microorganism and provides protection. Bacteria, fungi and some invertebrates in the leaf litter benefit by feed on it and using them as shelters. Microorganisms play role in breaking leaf litter into small parts and make it is easy for decomposition. Aquatic systems lakes show major inputs from autochthonous sources.
Knowledge about the industry has been found to vary to a large extent among regions, in relation to different aquaculture practices, socio-demographic characteristics, experiences and interests (Freeman et al., 2012; Verbeke et al., 2007a; Schlag and Ystgaard, 2013; Mazur et al., 2004; EC, 2008). As may be anticipated, higher awareness of aquaculture was recorded in areas where respondents report more contact with the industry (Mazur and Curtis, 2008; NZ, 2014) and where fish sales and consumption rates are high (EC, 2008). Nevertheless, outcomes of studies in various countries recommend that large parts of the general public may be relatively unaware in a range of aquaculture-related topics (Claret et al., 2014; Schlag and Ystgaard, 2013; Barrington et al., 2010; DFO, 2005; Pieniak, Vanhonacker and Verbeke, 2013). Moreover, exploratory revelations from focus-group discussions in Belgium and Canada indicate that aquaculture concerns are not at the top of the minds of many customers (Verbeke et al., 2007a; DFO, 2005), and the many people are not aware of the farmed or wild origin of the seafood they purchase (Vanhonacker et al., 2011; Claret et al., 2014). Regardless of this relatively low awareness of aquaculture, when confronted with the topic, consumers hold quite
Eukaryotic phytolanktons which comes under domain eukarya are divide by the process of mitosis. For the growth of phytoplankton twenty nutrients are required. Many elements like nitrogen, phosphorous, zinc, magnesium, calcium, silica are required for the growth of phytoplanktons. As these nutrients are present in sea water, phytoplanktons can grow easily. Overexposure to the nutrients to the phytoplanktons can create algal blooms.
Mwaluma (2010) studied community structure and spatio-temporal variability of ichtyoplankton in Kenyan Coastal waters method use the light trap fabrication and deployment. The traps were deployed per tide during high tide at depth 10-18m for 12 hours. Figure 3: The locally fabricated light trap with original (with metal frames)
Aquaculture takes place in inland, marine and coastal settings using a variety of methods, including raceways, cages, ponds, tanks, ropes, rafts and racks. Aquaculture has a major advantage over the decreasing capture fisheries as the time of harvest can be synchronized to coincide with market demand (FAO, 2008). Aquaculture is one arm of agriculture that can thrive in any ecological area of Nigeria. According to the Nigerian Fifth National Biodiversity Report, 2015, there are five priority ecological areas of Nigeria which are arid, Guinea savannah woodlands, coastal and marine ecosystem, rainforest belt including montaine forest and wetlands and river basins. As long as water (whether brackish or fresh) which creates the enabling environment for aquaculture industry to thrive is available or provided, aquaculture will do well in any part of Nigeria.
Pond Ecosystem Investigation Lab report By: Harshal Buradkar 9 grade Introduction A pond ecosystem consists of abiotic: light intensity of the water, depth of the water, and biotic: fish, plants, bacteria, algae, insects and etc. It also contains water and plants which is the most important part of the pond. Ponds are mostly shallow with the depth of 12-15 feet in which the sun rays can touch the bottom of the pond so that plants can grow. My aim is to find out how the plant cover affect the biodiversity of animal life in the pond. Experimental question How does the plant cover affect the biodiversity of animal life in the pond?
Since Fish Aquaculture is considered as a major source for food for humans worldwide, fish in aquaculture goes through a lot of process to maintain its healthy status and to meet market expectation, for these reasons, fish goes under xenobiotics such as antibiotics, antifungals, water antiseptic, artificial diets, however all these substance has an impact on fish and eventually on human health. The purpose of this study is to evaluate the impact of xenobiotics in general and artificial diet in particular on fish, in aquaculture conditions. The overall finding of the results showed that O. niloticus spp. had been goes through many types of xenobiotics in aquaculture farms, these xenobiotics can enter fish system through tow routs, 1- through
using a weighted overlay where the weights are proportional to importance (Nath et al., 2000). This is useful as it allows the assessment of the spatial variability of the environmental, biological, and socioeconomic specifications relevant to marine aquaculture including consideration of the different levels of importance amongst parameters and providing a qualitative and quantitative output that is useful and easy to understand for decision makers. Various research studies have been conducted in order to select suitable sites for marine aquaculture. Some of these studies include identifying suitable sites for coastal aquaculture in Camas Bruaich Ruaidhe, Mexico (Ross et al., 1993), selecting Margarita