How does tilapia became sensitive to environmental changes? What Are these environmental changes?
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Tilapia exhibit sensitivity to environmental changes, particularly in response to temperature variations and parasitic infestations. Studies show that temperature shifts impact the release of distinct prolactin isoforms in tilapia, affecting mRNA levels and cell responses . Additionally, gill parasites like Monogenoidea and Lernaeidae are influenced by water temperature, with histological changes observed in infected fish . Furthermore, different strains of Nile tilapia display varying tolerance to hypoxic and thermal stressors, with implications for growth and welfare under different environmental conditions . Larger tilapia individuals may face limitations in oxygen provision for aerobic activities under global warming scenarios, affecting their survival and fitness . Overall, temperature variations and parasitic infestations significantly impact the physiological responses and well-being of tilapia populations.
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18 Jul 2022 | Tilapia become sensitive to environmental changes due to thermal stress, leading to mortality, altered hematological parameters, and histopathological changes in liver and gonads. Environmental changes include temperature variations. |
| Tilapia sensitivity to environmental changes, like acute warming, increases with body mass due to reduced oxygen uptake capacity, impacting survival and fitness in warmer conditions. | |
| Tilapia sensitivity to environmental changes is influenced by factors like hypoxia and hyperthermia. The GIFT strain showed lower hypoxia and thermal tolerance compared to the Akosombo strain. | |
| Tilapia sensitivity to environmental changes is influenced by water temperature fluctuations, seasonal variations, and water quality parameters, impacting parasite infestation levels and gill histological changes. | |
| Tilapia become sensitive to environmental changes through thermosensitive PRL cells in response to a 6°C temperature increase, leading to PRL release and cell volume changes, influenced by osmotic stimuli. |
Related Questions
How does global warming affect mozambique tilapia reproduction?5 answersGlobal warming impacts Mozambique tilapia reproduction by influencing water temperature, which is crucial for fish biology. Studies show that elevated temperatures can affect growth, survival rates, gonad development, and sex ratios in Mozambique tilapia. Additionally, long-term exposure to high temperatures can reduce survival rates, hypoxia tolerance, and increase respiratory rates in tilapia, ultimately threatening their viability and survival. Furthermore, the interactive effects of greenhouse-mediated temperature increases and manure-driven water quality-food resource complex can create a more favorable environment for tilapia reproduction, as seen in studies where tilapia spawned more under greenhouse conditions due to synergistic effects. Overall, global warming-induced temperature changes can significantly impact Mozambique tilapia reproduction through various biological and environmental mechanisms.
What are the effects of warming on Nile tilapia?5 answersWarming temperatures have several effects on Nile tilapia. Exposure to high temperatures can reduce survival rates, tolerance to hypoxia, and increase respiratory rates. Larger fish may struggle to survive at higher temperatures due to limitations in their capacity for oxygen uptake, potentially leading to smaller fish populations as temperatures rise. Global warming can increase water temperature, which affects the biology of Nile tilapia and other fish species. Cold stress also poses a threat to Nile tilapia, as they have limited cold resistance due to mitochondrial dysfunction and mitochondria-mediated cell apoptosis. Additionally, increased water temperature can up-regulate oxygen consumption and metabolic rates in Nile tilapia, altering physiological processes and affecting high temperature tolerance. Overall, warming temperatures have significant implications for the survival, metabolism, and physiological responses of Nile tilapia.
What are the environmental impacts of using date kernels to feed tilapia fish?5 answersUsing date kernels as a feed ingredient for tilapia fish can have both positive and negative environmental impacts. On the positive side, incorporating date fiber (DF) into the fish feed can result in improved growth parameters, such as weight gain and protein efficiency ratio. Additionally, diets containing wasted date as a replacement for starch can lead to better feed conversion and specific growth rate in tilapia. However, there are also potential negative impacts. Increasing the dietary level of DF beyond a certain point can result in retardation of growth parameters and changes in the fish's intestinal villi. Furthermore, the use of fish meal-free feeds, which may include date kernels, can help reduce nitrogen and phosphorus discharge, as well as waste and pollution in water bodies. Overall, the environmental impacts of using date kernels as a feed ingredient for tilapia fish depend on the specific dietary levels and other feed components used.
What are the effects of cadmium residues on tilapia cultivation in the ambient?5 answersCadmium residues have various effects on tilapia cultivation in the ambient. Exposure to sublethal concentrations of Cd can lead to impaired osmoregulation and acid-base balance, inhibiting respiration and reducing ionic and osmotic regulation. Cd can also decrease the levels of red blood cells, hemoglobin, and hematocrit, limiting a fish's ability to provide oxygen to its cells and diminishing its physical activity and productivity. Long-term Cd exposure can further inhibit growth, reduce antioxidant capacity, and cause oxidative damage to lipids and DNA in juvenile Nile tilapia. These effects can have significant consequences for the overall health and productivity of tilapia in aquatic environments.
How do the minerals and wastes of tilapia cultivation affect the environment?3 answersTilapia cultivation wastes, such as scale, skin, internal organs, viscera, trimmings, bone, tails, and fins, are difficult to dispose of and have become a global environmental concern. These discarded fish wastes contribute to anthropogenic pollution in aquatic environments, particularly in areas affected by intensive aquaculture. The concentration and spatial distribution of trace metals, including Fe, Mn, Zn, Cu, Cr, Cd, Pb, and Ni, have been found to be higher in sediments near tilapia farming areas. However, the recovery of valuable materials from tilapia biowaste, such as hydroxyapatite, gelatin, and fish oil, can help reduce the environmental problems caused by discarded tilapia wastes. Additionally, the treatment of tilapia cultivation wastewater with vetiver plants has been shown to lower the concentration of nitrogen and phosphorus, which are common pollutants in aquaculture. Overall, the minerals and wastes from tilapia cultivation can have negative impacts on the environment, but there are potential solutions for mitigating these effects.
What is the history of tilapia?3 answersTilapia is a group of freshwater fish species that originated from Africa and the Middle East. They have been introduced and distributed in many regions across the globe. The history of tilapia in Hawaii began in the 1950s with the introduction of five species for recreational, research, and commercial purposes. Tilapia transfers and introductions have occurred both inside and outside Africa, with social and economic benefits as well as adverse ecological impacts. Currently, tilapia are divided into three genera: Tilapia, Sarotherodon, and Oreochromis, with continuous modifications to their taxonomic classification. Nile tilapia (Oreochromis niloticus) is the most dominant farmed tilapia species globally, due to its adaptability, rapid growth, and popularity with consumers. The tribe Tilapiini includes several genera, including Tilapia, Sarotherodon, and Oreochromis, among others, and is distinguished from the Haplochromini by the structure of the apophysis on the base of the skull.