The use of microalgae as a live food for feeding of aquatic organisms well documented by several researchers (Cho and et al., 1999; Zhu, et al., 1997; Luyen, et al., 2007; Rivero-Rodríguez, et al., 2007; Duerr, et al., 1998; Brown, et al., 1997). In mariculture, microalgae either directly support all growth stages of bivalves, and larval stages of crustaceans and fish or indirectly are fed to artemia or rotifers, which are then fed on to later larval/ juveniles stages of crustacean and fish larvae through providing essential nutrients and other growth promoting factors (Cho and et al., 1999).Therefore, the nutritional property of microalgae offered to feed aquatic animals is crucial especially during the larval stages as well as their rapid growth rate and having an appropriate size for ingestion (Brown, et al., 1997). De Castro Araújo, et al. (2005) has mentioned that growth rate or biomass and biochemical composition of microalgae are two important characteristics which evaluate the potential of a species to be used for aquaculture purposes. Due to these reasons, several studies...
The understanding of Saballaria cementarium's diet has not been thoroughly examined in much detail. Qian and Chia (1990) examined the role of detritus, form of eelgrass, as a food source for developing larvae of the organism. It is not known whether they are food limited. The experiment was conducted to reveal some facts about the feeding habits of the larvae in determining the development and growth of it. The invertebrate larvae's primary food source comes from the phytoplankton that is found in abundance at the bottom of the sea floor. The larvae fed with detritus were compared with those fed on equal concentrations of phytoplankton. Other tests were conducted to compare the degrees of survivorship among the larvae using varying concentrations of phytoplankton. Higher concentrations of phytoplankton, consumed by the larvae, yielded
Naegleria fowleri, the brain eating amoeba, exists around the world; reservoirs of N fowleri include sediments of lakes, rivers, geothermal water, soil, and poorly kept swimming pools. These microbes can live in temperatures up to 45 degree Celsius and do not require a host cell for survival. The free-living amoeba is the etiological source of primary amoebic meningeocephalitis (PAM), an acute and fatal disease of the central nervous system with fatality rates over 99%. Onset of illness is quick and death typically occurs within 7-14 days. Treatment for PAM poses a challenge because of rapid disease progression and limited awareness among clinicians. According to the CDC, there are more than 30 species of Naegleria that exist, however, N fowleri is exclusively the species recognized to be pathogenic in humans. When conditions are favorable, this free-living amoeba can survive outside of the host cell.
There is a lot of talk about the world’s source of energy going on these days and people are starting to ask questions about our sources of energy. Is it environmentally friendly? Does it make sense economically? For years the world has been highly dependent on fossil fuels that are extracted from the ground. These fuels power things from power plants, cars, plains, and many of the other modern conveniences that we enjoy. There is a lot of energy expended in the extraction and transport of these fuels as well as many negative environmental impacts. Scientists are busy finding alternative ways to power our world that are cost efficient and ecofriendly. One idea that is being explored as an effective replacement is producing oil from algae. Algae have a high content of oil, about 50 percent of its weight, and science is finding a way to use it as a clean fuel source.
Reason Two: Daphnia are also an able to be used in bioassays because they are very sensitive to any changes within the water and a very simple and cheap. They mature in a very short period of time, so it does not take long to grow them to maturity and test. ”Bioassays are procedures that can determine the concentration, purity, or biological activity of a substance such as vitamin, hormone, or plant growth factor by measuring the effect on an organism, tissue, cells, enzyme, or
Most of my feelings I have towards microcultures are all based of personal experiences. I think everyone always has some sort of feelings that come to mind when they see or interact with a certain microculture and I am no exception. When it comes to rich people, I feel annoyed, envy, and optimistic. I sometimes wish I had a lot of money and that feeling makes me optimistic about my future. I think rich people are greedy because even though they have a lot of money already, all they want is more. I also think rich people often believe they are superior to others because of their money. They think because they are rich that they are above everyone else. These feelings and opinions come from personal experiences I have dealt with before. I once had a rich friend who drove to school with a Mercedes, wore $500 shoes, and gold watches but when I asked him for 50 cents for lunch he always said no. Like I always felt from then on that rich people are so stingy when it comes to their money. Also I had a student who sat next to me who was also rich and when I asked for help, he just ignored me. I did not understand why and the only reason I could think of was because he thought I was not worth talking to or helping.
The study used a variety of species of fish, crab, shrimp, lobster, and other crustaceans known to live on the bottom waters of the Long Island Sound were exposed to low levels of oxygen in the laboratory. The effect of different concentration of oxygen on growth and survival was measured.
The Artemia franciscana can survive in extreme conditions of salinity, water depth, and temperature (Biology 108 laboratory manual, 2010), but do A. franciscana prefer these conditions or do they simply cope with their surroundings? This experiment explored the extent of the A. franciscanas preference towards three major stimuli: light, temperature, and acidity. A. franciscana are able to endure extreme temperature ranges from 6 ̊ C to 40 ̊ C, however since their optimal temperature for breeding is about room temperature it can be inferred that the A. franciscana will prefer this over other temperatures (Al Dhaheri and Drew, 2003). This is much the same in regards to acidity as Artemia franciscana, in general thrive in saline lakes, can survive pH ranges between 7 and 10 with 8 being ideal for cysts(eggs) to hatch (Al Dhaheri and Drew, 2003). Based on this fact alone the tested A. franciscana should show preference to higher pH levels. In nature A. franciscana feed by scraping food, such as algae, of rocks and can be classified as a bottom feeder; with this said, A. franciscana are usually located in shallow waters. In respect to the preference of light intensity, A. franciscana can be hypothesized to respond to light erratically (Fox, 2001; Al Dhaheri and Drew, 2003). Using these predictions, and the results of the experimentation on the A. franciscana and stimuli, we will be able to determine their preference towards light, temperature, and pH.
Do you love the slimy,green,and gooey, flavor of kelp? Many people don't , not realizing
Shrimp can be very intelligent animals and have very amazing things such as being clear, this may seem weird but yes, they are clear. Shrimp live in the ocean and come in contact with many different plants animals. The most common plant that the shrimp comes in contact the most with and use for protection is seaweed, coral, and algae. Shrimp use the for protection to hide from the other animals they depend on shrimp for their diet, most of these animals are sharks, whales and sometimes crabs are included. The change of having no eyes helps the shrimp hide from these and keeps the population at a good rate and this has also helped overfishing with not having contact with other animals and causing lots of movement to the other animals and fisherman.
Growing food with Aquaponics is more efficient than growing food the traditional soil garden way. In a typical soil garden, growers end up spending hours of their time doing back breaking work on their garden, but not anymore, with Aquaponics the need for any tilling, digging, or weeding is eliminated. Aquaponics combines Aquaculture (Raising fish in tanks), and Hydroponics (Growing plants without soil). The outcome is a working system that provides plants with all the nutrients they need, while using a minimum of space, effort, water, fertilizers, and pesticides. Aquaponics allows farmers to use up to 90% less water than normal farming would use, so instead of watering your soil and having the majority of your water either lost by run off or evaporated by the sun, the water is recycled repeatedly through the system saving farmers hundreds of dollars on their monthly water bills. Also when growing with Aquaponics, much more food can be produced in a smaller space, in some cases growers have produced around twenty times the amount of produce in the same area a soil garden would. In addition, with the closed, controlled environment of the system, the need for the use of any pesticides a basically eliminated. Finally, Aquaponics enables growers to grow bigger, better and more quality produce.
In the first study examined, “Effect of Different Salinities on the Survival and Growth of Artemina Spp,” researchers Soundaraparian and Saravanakumar designed an experiment to ascertain the ideal conditions for the growth of brine shrimp, or Artemina. In the Introduction, the scientists note the growing significance of Artemina, as it is now used as live feed for over 85 percent of cultured species around the world. Thus, a demand to grow huge quantities of Artemia has arisen, making this study incredibly relevant.
Bangus raising will generally take approximately four (4) months in order to be viable in the market for sale. Aside from the four-month raising period, the fishpond must be grown with algae that will serve as natural food for the bangus being raised. In connection with this, several types of fertilizers are needed to assists the growth of these algae. The table below will show the fertilizers that will be used along with its required volume and estimated prices provided by the Bureau of Fisheries and Aquatic Resources – Cagayan de Oro City Chapter.
I did some research on aquaculture on Encyclopedia Britannica and found some interesting information. Aquaculture is considered an integration of fishing and agric...
Seagrass is on the decline around the world and it is an extremely vital marine ecosystem found in shallow water mainly distributed throughout tropical seas, from a temperature around 4oC to 24oC (Green and Short 2003). They are the only true flowering plant (angiosperm) to live in aquatic conditions providing support and shelter for vast amounts of species (Orth et al. 2006; Jackson et al. 2001). They are a marine aquatic plant and a keystone species for many coastal areas found all over the world (Libralato, Christensen and Pauly 2006). Although there is not a huge variety of species, there are only around 60 species globally and over 14% of them are endangered (Green and Short 2003; Orth et al. 2006). The different seagrass ecosystems perform relatively similarly throughout the varying species (Turner and Schwarz 2006). This study will examine the various importances of seagrass and to what extent they are vital for the survival of species within their ecosystem. In addition to this, the role of seagrass in important ecosystem processes will be examined. The abundance of coastal regions are closely linked with seagrasses as they greatly contribute to productivity. Seagrass meadows are highly productive and are ideal for nurseries and providing a relatively safe habitat and shelter from predators (Hughes et al. (2008).
green algae. In this lab a red, green and brown algae will be used to