Articles tagged with Fish
Researchers in the Bahamas are creating one of the world's first marine reserve networks to preserve fish abundance and variety while maintaining fishing harvests. The study aims to design a sustainable fishing system through a multidisciplinary approach, incorporating economic, ecotourism, and political factors.
A recent study found that non-destructive fishing methods on the Banggai cardinalfish population reduced group size by half. This threat is alarming, given the species has been commercially fished for only six years and its range expands widely. To mitigate this, researchers encourage local people to raise Banggai cardinalfish in aquar...
The study reveals that industrial fishing has reduced the resource base to less than 10% globally, threatening entire communities of large fish species. The authors urge international collaboration to restore fisheries and marine ecosystems to healthy levels, highlighting the need for action on a global scale.
A new study finds that oxygen deficiency can impair fish reproduction by disrupting endocrine function and reducing fertility rates. Long-term exposure to hypoxia can lead to major declines in fish populations, potentially causing extinction for some species.
Groundbreaking studies show that marine protected areas can help maintain migratory species populations and increase fish catches, while also providing economic benefits for society. However, the optimal MPA size varies depending on specific situations, with estimates suggesting sizes of 25-70% of the total area.
Scientists are using species profiling to help prevent invasive fish introductions into the Great Lakes and other waterways. A new method has been discovered to detect skin diseases in fish using a fluorescent dye.
The study found that coral reef fish deliberately choose mangrove forests and seagrass fields as nursery grounds, providing shelter from predatory fish and a feeding place. Without these habitats, common and economically important coral fish species will not survive.
A new study reveals that coral reef biodiversity hotspots are not driven by local endemic species, but rather by the overlap of globally dispersed species. Conservation efforts should target both high and low biodiversity regions.
Research by Thomas Chen at the University of Connecticut has shown that a new growth hormone treatment can increase fish size by up to 600 percent. The treatment involves using a synthetic peptide to stimulate growth, with potential applications in reducing feed costs and increasing fish yields.
Researchers tested the effectiveness of an electric barrier in preventing Asian carp from passing through a simulated barrier near Romeoville, Illinois. The study found that only one fish out of 381 attempts successfully passed through the barrier, and smaller fish were less susceptible to the electric current.
A study finds that deep-sea trawling is depleting populations of vulnerable fish species and invertebrates worldwide. Conservation efforts are needed to protect these species from extinction.
Researchers at HHMI used the threespine stickleback as a model to study genetic changes that define a species. They discovered that different chromosome regions control the development of different parts of the fish skeleton and found correlations between spine lengths and genetic variation.
Invasive round gobies are interfering with mottled sculpin spawning in the Great Lakes, potentially affecting yellow perch populations. The study suggests that removing larger rocks from prime spawning sites or creating artificial shelters for sculpins could minimize goby breeding and encourage sculpin reproduction.
The study found that while some economically important species like walleye and smallmouth bass decline, others like black crappie and common carp increase in abundance. The researchers conclude that ecosystem recovery is a positive sign, despite trade-offs in managing for certain species.
Researchers discovered that fish use crossflow filtration to separate food particles from water, contrary to the long-held sieving model. Computer models and fiber-optic endoscopes confirmed this finding, revealing a swirling vortex at the roof of the mouth where food particles are trapped.
A team of archaeologists led by Dr. Clark Erickson discovered a unique landscape-scale fishery operated by pre-Columbian native peoples in the Baures region of Bolivia. The ancient earthworks, built around 300 years ago, provided intensive aquaculture allowing for sustainable food production.
Researchers found that fish and flies can differentiate according to specific habitats within nine and 13 generations, respectively. These findings provide a basis for studying the role of natural selection in species evolution and offer insights into the processes of rapid speciation in nature.
American bullfrogs are non-native to western Canada, but their population is expanding rapidly due to human activity. Purnima Govindarajulu, a UVic graduate student, is studying the impact of these invasive frogs on native species and ecosystems.
Researchers at Cornell University found that larger lakes have longer food chains than smaller ones, contrary to previous assumptions about energy availability. The study suggests that the size of an ecosystem, not energy levels, constrains food-chain length.
A study by Purdue University researchers found that transgenic fish can threaten native populations due to their larger size, which gives them a mating advantage. The
Biologists warn that genetically modified fish carrying the human growth hormone gene could turn Darwinian evolution upside down and lead to population decline. A single transgenic individual can cause a population to dwindle and eventually become extinct due to the rapid spread of the 'Trojan gene'.
A UB Study found no correlation between male consumption of Lake Ontario fish contaminated with PCBs and pesticides, and delayed conception in women. The study analyzed data from 785 women who had conceived between 1991-93, but did not find a significant link to conception delay, despite concerns about potential reproductive effects.
A six-university panel of river experts suggests that restoring a river's natural flow regime is crucial for maintaining ecological integrity. By allowing rivers to repair and maintain themselves, scientists can enhance different portions of the flow regime through changes to dams and water-use operations.
Researchers found a small association between eating Lake Ontario fish and shortened menstrual cycles, with an average reduction of 1.1 days. The study also reported a statistically insignificant delay in the time it took women to become pregnant.
Two USGS studies investigate endocrine disruption in carp, finding significant differences in sex steroid hormones and vitellogenin across regions. Pesticide concentrations were also detected in higher levels in certain waterways, raising concerns about the impact of environmental contaminants on fish populations.
Scientists are releasing 15,000 fingerlings into northeast Georgia's Broad River as part of a reintroduction effort for the robust redhorse, a fish thought extinct until survivors were discovered in 1991. The fingerlings have been artificially bred from surviving members and will be released at seven sites to help the species flourish.