...studies on its behavioral and physiological response to stress are available. In this study, 27 red Nile tilapia (RNT) were subjected to confinement and social stresses. This experiment monitored their physiological (plasma cortisol) and morphological [ventilation rate (VR) and skin color] responses to stress. The plasma cortisol and VR of the fish before exposure to stressors were significantly lower compared to there values after the introduction of stressor. For fish subjected to social stress, there was also a significantly higher cortisol level and VR in the dominant fish compared to those in the subordinate fish. The skin color of red tilapia was also...
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...all of the stress brought about by daily activities, everyone needs to unwind and find peaceful distractions. Thousands of people suffer from high blood pressure, lack of sleep and malnutrition due to stress. If you are having a difficulty managing your stress levels, maybe the time has come to purchase an aquarium and dive into the hobby of fishkeeping. Researchers have been searching for cures for stress related problems and have found that medication is not the only way to help treat stress and stress related issues. Analysts have found that owning or being around aquariums is one of the best methods to help cure these issues. There are many more benefits of owning an aquarium than just easing stress levels and treating a busy mind. Studies going back as far as three decades reveal that gazing at an aquarium is one of the safest ways to lower high blood pressure, which is the leading cause of many illnesses and even death. Tests concluding that aquariums promote beneficial effects on the human mind started from conducting test with people where they would observe aquariums with no fish versus aquariums that were filled with fish. Studies showed that people staring at the way underwater wildlife interact and move had reduced stress levels compared to those who were observing the aquarium that contained no fish. The most notable effects that come from fish watching with an aquarium have been found to be almost the exact same effects as hypnosis. Calming effect of a fish tanks have...
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...Keeping fish in an aquarim Did you know the average ration of fish kept alive in an aquarium vs. how many perish just trying to make it to the exhbit and survive there is 50%? I ask you this because, although we all appreciate the beauty of the diverse animals and swirling colors, in the end is the loss worth it? Before a fish is placed into an aquarium it goes through quarantine. Quarantine can be described as a different process to most facilities, but one goal is in common, to add "healthy" fish to the main exhibits. Most fish are brought in from an extremely stressful transfter that consists of being shipped in small, air depleted bags (yes, fish do breath oxygen from the water that is taken from outside air mixed into the water; dissolved oxygen) and temperature fluctuations that leave the animals immunity lessened. After they are acclimated, some quickly, the are introduced into quarantine tanks. At a proper aquarium the fish is given time to get used to the surroundings and usually should be observed eating before any chemicals are added to the tank, some, however begin right away. A common chemical used is Copper. Copper is deadly to fish in high doses, but if you use just the right amount you can kill any "hitchhikers";parasites that have survived the trip. This may be used in conjuction with other chemicals and temperature fluctuations to produce a parasite free specimen. Imagine yourself packed into a tiny box depleted of air, added to an alien environment and...
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...blood urea,creatinine and blood urea nitrogen of fresh water fish channa punctatus(Bloch.). The sub lethal concentration was 0.09ml(1/5 of LC50) of malathion for which the fish was exposed at different time intervals 7,14,21 and 28 days. The present study showed statistically increase value in blood urea,creatinine and blood urea nitrogen. Introduction Pollution due to pesticides needs considerable attention because of the toxicants, which lack the capacity to dramatically increase the rate of...
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...too! From catching fish! During the spawning period the bass are somewhat easy to catch. Most of them are in the shallows. This eliminates ninety percent of the water you have to check to find fish. You only have a small number of tactics you have to try before you pattern the fish. The post spawn period is a whole new ballgame. When you go to the shallows to try for those easy fish that were there last week, you will be lucky to have a ten percent success ratio. Most of the...
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...Chapter I INTRODUCTION Background of the Study One of the major sources of protein in human diet is fish. In fact, marine animals were assumed by ancient writers to be symbols of good health. However, nowadays, marine animals are far from being representatives of good health. They are subjected to diseases just as much as their terrestrial counterparts. Disease, in fishes, is closely linked to environmental stress. In the wild, they generally have some degree of freedom to modify their environment. They can move to more suitable conditions if faced with a negative environmental change such as a reduction in oxygen level. In culture conditions, on the other hand, they have limited opportunity to choose their external environmental conditions. Most individual fish, may it be in wild or cultivated populations are infected with parasites. The number of parasites necessary to cause harm to the fish varies considerably with the species and size of the host and its health status. Many parasite species are host-specific to at least some degree and are capable of infecting one or only a limited number of host species. Parasites disease of fish (and livestock) reduces the amount of food available to people around the globe. This is why many researchers mention that it is imperative to investigate the relationship between the environmental factors which affects the parasites that affect production and quality. Even today, it remains difficult to convince governments and...
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...1/18/2014 SimUText :: Printable Chapter :: Life History PRINT ER-FRIENDLY PAGE: T his page contains the com plete tex t of this Sim UT ex t chapter. Y ou can use y our browser's print function to print a copy . Life History This chapter explores life cycles, life histories and life tables, and explores the trade-offs that different species make in their reproductive strategy. file:///C:/Users/Hossein/SimUText/labs/LifeHistory_20700/instructions/print_chapter.html 1/156 1/18/2014 SimUText :: Printable Chapter :: Life History Contents Se ction 1 : Life Cycle s a nd Life Historie s Chapter Credits This Sim UText chapter was dev eloped by a team including: Lead Author: Simon Bird Authors: W. John Roach, Ellie Steinberg, Eli Meir Reviewer: Susan Maruca Graphics: Brad Beesley, Jennifer Wallner Simulations: Susan Maruca Programming: Derek Stal, Steve Allison-Bunnell, Jen Jacaruso Outside Reviewer: James Danoff-Burg (Columbia University) Thanks to all the students and instructors who helped test prototy pes of this chapter. For m ore inform ation, please v isit www.sim bio.com . Suggested citation: Sim on Bird, Susan Maruca, W. John Roach, Ellie Steinberg, Eli Meir. 2 009 . Life History . In Sim UText Ecology . Sim bio.com . Sim UText is a registered tradem ark of Sim Biotic Software for Teaching and Research, Inc. © 2 009 -2 01 2 Sim Bio. All Rights Reserv ed. This and other Sim bio Interactiv e Chapters® are accessible through the Sim UText Sy stem ®. ...
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...Introduction: Keeping aquarium or “ornamental” fish as pets in aquaria or garden ponds is becoming an increasingly popular pastime in NSW. Many hundreds of fish species, both native and exotic, are sold for this purpose by aquarium suppliers and it has been estimated that this industry is worth $350 million annually in Australia. Keeping ornamental fish is a great hobby for people of all ages, however it is important to make sure your aquarium and its inhabitants remain happy and healthy. Here are a few things you should remember: * Know your fish – Some need special conditions and diet, while others are aggressive and unsuitable for a community tank. * Change the water – Replace about a third of the water in your aquarium at least once a month. Tap water may contain chemicals that harm your fish so make sure you add a water conditioner available from your pet shop. * Remove sick fish – Diseased fish can contaminate others so remove them quickly. * Don’t overfeed – Feed only as much as your fish will eat in one minute and just once a day, or as advised by your pet shop. * Don’t overcrowd – Overcrowding increases pollution and aggression problems. Testing Aquarium Water: Water chemistry is not visible; therefore, it is vital to check it on a regular basis. The best way to make this a routine is to check on the tank chemistry while changing the water. The vital parameters are pH, nitrates, nitrites, and carbonate hardness (salinity for marine tanks). Stability...
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...REACTION PAPER Water is very important to us specially to all species of fish because, without water fish not alive, but boni comandante a successful entrepreneur he wasn’t a scientist but he found and gathered another information, knowledge and ideas on how the fish alive, same texture, less expense and exporting to other country without water. Put’s fish to sleep? This is a crazy and unvailivable idea but with this idea, boni comandante become succesful and become a millionare. Influence of other people specially boni comandante do some research regarding to the fish puts to sleep he eventaully succeed and he become a successful. Boni comandate story a succesful entrepreneur i am so much amaze and idolize him, and one thing you have to remember, if thier is one thing you discover dont wates a time do some reseach or gathered other information to become successful. SUMMARY Bonifacio Comandante Jr., was born in the island of siquijor ,his father was an architect and his mother a nures .boni comandante gradauted from the university of the philippines at los banos with the degree in agricultural engineering. He went to work for a government irrigation and boni comandante won in the international category of the University of San Francisco business plan competition in California. He, invented the technology by undergoing a conditioning process in which the fishes, or any marine species, are held overnight in filtered, circulated seawater at about 30-degrees Centigrade...
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...PDF Reader. We have massive collection of documents, Ebook and pdf files including that you are looking Ebook Hot Tub Mystery Case Study Answers PDF. To access this you just need to signed up and complete its through website to open your limited access for documents that you needs. So what do you waiting for? Follow this link to read online and download HOT TUB MYSTERY CASE STUDY ANSWERS from our online library. Download: HOT TUB MYSTERY CASE STUDY ANSWERS PDF You are also possible to search for a book or subject on the digital platform. You can access ebooks on our online library related to the subject, i.e. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Hot Tub Mystery Case Study Answers Fish Kill Mystery Case Study Answers Mystery Of The Seven Deaths Case Study Cellular Respiration Case Study Mystery Seven Deaths Fish Kill Mystery Case Study Answer Key Mosby Elsevier Case Study Answers Case Studies Case Of Diabetes Insipidus Case Study Answers Cfp Case Study Answers Dr Zak Case Study Answers Case Study 7 Answers PDF File: Hot Tub...
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...ecosystems in the world, inhabiting around 25% of all marine species; 4000 of which are fish and another 800 are hard coral (Reaka-Kudla, 1997). Many different factors by both human and natural causes propose threats to the coral reef's. Some of which, if carried on, could mean that the coral reef's will subside. Coral reef's are a major habitat for marine organisms. But if their population declined, this wouldn't just affect different species that live there, it would also affect humans as well. Many different species of fish live in the reef's that humans live off so if overfishing continues in the coral reef's then humans will have to find an alternative food source or try fishing elsewhere. However...
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...Impact of hypoxia to the catfish industry Oxygen is important for aerobic organisms, especially for fish who live in the aquatic environment with routinely low dissolved oxygen (Wang et al., 2017b). Under aquaculture conditions, hypoxia can be caused by natural phenomena (e.g., weather, temperature, or water flow rate), water pollution and eutrophication, high stocking density, and improper use of aeration (Green et al., 2016; Wu, 2002; Zhang et al., 2010). In spite of the strong tolerance of catfish to low oxygen, hypoxia can still lead to huge economic losses. Exposure to low oxygen stress can affect the growth rate (Mallya, 2007), feed conversion rate (Buentello et al., 2000), and increase the susceptibility to infectious diseases of catfish...
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...3. (a) The brook trout thrives in the pH level range of 5.0 pH to 7.0pH. This pH range corresponds to the hydrogen-ion concentration [H+] of 10 [H+] to 0.10 [H+]. (b) An indication that a lake’s pH has changed from pH 5.8 to pH 5.2 would be the thriving lake trout population would dwell as the conditions become less favorable, but survival. Conditions for the rainbow trout population would worsen as they would all completely disappear, the pH levels would not be survivable for the fish. This would indicate fewer amounts of lake trout and the disappearance of rainbow trout because the pH levels have allowed the water to become intolerable to the organisms. The crayfish and mayfly populations would also completely disappear as the pH is one in...
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...begins to talk to Georgia about the rates for her service and specifically mentions that he requires home pet car for both his award winning rabbit and his tropical fish. He explains that he is soon to show his award winning rabbit at a show in Melbourne where, if he wins, he will receive $10,000. During the conversation Georgia states ‘I am a professional, an animal lover and that this should not be a problem’. She informs Malcolm that her rate for caring for both his rabbit and fish will be $100 per day for a total of $700 for the week she is to care for them. The next day, Georgia emails Malcolm a copy of a standard form contract that she uses with all of her home pet care clients. This standard form contract contains (inter alia) the following clause: ‘Georgia maintains the highest standards in animal care. However Georgia will not be liable for death or illness of tropical fish due to their specific vulnerabilities.’ Malcolm is very busy preparing for his trip away. Consequently, he does not read the contract but signs it and returns it to Georgia in person along with a cheque for $700. While he is away Georgia attends frequently to the pets but incorrectly feeds the fish the rabbit food and the rabbit the fish food. Upon returning home the following week, Malcolm finds that his tropical fish worth thousands of dollars have died. In addition, due to...
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...also brings recreational water quality to an issue. Bacterial contaminants spread to fish and certain contaminants results in bioaccumulation and biomagnifies in the food chains. The bioaccumulation describes the buildup of chemicals in fish while Biomagnify is the concentration of chemical build-up in fish (Scharfe, 2008). Chemicals can end up in fish through wind and rain run-off into rivers, lakes, or any body of water. People are generally at the top of this food chain because we eat the fish. Just like chemicals build up in fish, they can build up in our bodies. This chemical build up may not cause health problems right away, but could lead to future health problems. The rise and fall of of Lake Huron’s fish is ongoing over the last century. Currently, Lake Huron is on the rise for healthy fish consumption, but the levels of fish available for consumption have decreased due to “the spiny water flea, an invasive zooplankton that often clumps on fishing lines and downrigger cables. Smelt were also found in significant numbers of Chinook salmon stomachs.” (Great Lakes Fishing Council, 2011)(http://www.great-lakes.org/Wkly_news/graphics/08-01-11-D.jpg) There have been several fish consumption advisories that provide information on the levels of contamination that are unsafe for humans. They focus on the types of fish to avoid or the amounts required for human consumption. However, fish are essential for a healthy diet because they are a low calorie source of protein but...
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