Marine Biology News
Welcome to Sea and Sky's Marine Biology News. Here you can find links to the latest ocean news headlines in the topic of marine biology. Click on any yellow title below to view the full news article. The news article will open in a new browser window. Simply close the browser window when you are finished reading the article to return to the news article listing. You can use the "Click for More" link to go to a page with more news headlines.
|Salmon louse delay salmon returning to spawn|
Outbreaks of salmon louse during smolt migration reduce the survival rate of the smolt and mean that salmon spend longer at sea before returning to spawn. The mortality rate among migrating smolt as a result of salmon louse corresponds to previous findings both abroad and in Norway, including over a longer time period in the Daleelva.
Publ.Date : Mon, 10 Mar 2014 09:07:57 EDT
'Super bacteria' clean up after oil spills
Researchers have achieved surprising results by exploiting nature's own ability to clean up after oil spills. Scientists know that marine bacteria can assist in cleaning up after oil spills. What is surprising is that given the right kind of encouragement, they can be even more effective.
Publ.Date : Mon, 10 Mar 2014 09:06:15 EDT
First animals oxygenated Earth's oceans, study suggests
The evolution of the first animals may have oxygenated Earth's oceans -- contrary to the traditional view that a rise in oxygen triggered their development. New research contests the long held belief that oxygenation of the atmosphere and oceans was a pre-requisite for the evolution of complex life forms. The study builds on the recent work of scientists in Denmark who found that sponges -- the first animals to evolve -- require only small amounts of oxygen.
Publ.Date : Sun, 09 Mar 2014 15:05:40 EDT
Over demanding market affects fisheries more than climate change
Fisheries that rely on short life species, such as shrimp or sardine, have been more affected by climate change, because this phenomenon affects chlorophyll production, which is vital for phytoplankton, the main food for both species.
Publ.Date : Fri, 07 Mar 2014 16:59:15 EST
Urgent need to study impacts of biomass burning and haze on marine ecosystems in Southeast Asia
Crop residue and forests are burnt in many tropical countries to clear land for agriculture. In Indonesia, annual biomass burning activities cause a widespread smoke-haze phenomenon that affects human health, quality of life and incomes locally and in neighboring countries. While the impacts of these large-scale burning on terrestrial and atmospheric habitats are immediate and obvious, little is known about how adjacent coastal ecosystems such as coral reefs, seagrass and mangroves are affected.
Publ.Date : Fri, 07 Mar 2014 08:38:26 EST
New insights into ancient Pacific settlers' diet: Diet based on foraging, not horticulture
Researchers studying 3,000-year-old skeletons from the oldest known cemetery in the Pacific Islands are casting new light on the diet and lives of the enigmatic Lapita people, the likely ancestors of Polynesians. Their results—obtained from analysing stable isotope ratios of three elements in the bone collagen of 49 adults buried at the Teouma archaeological site on Vanuatu’s Efate Island—suggest that its early Lapita settlers ate reef fish, marine turtles, fruit bats, free-range pigs and chickens, rather than primarily relying on growing crops for human food and animal fodder.
Publ.Date : Wed, 05 Mar 2014 19:15:21 EST
3-D scans map widespread fish disease
Seventy-five percent of antibiotics in Danish fish farms is used to treat fish with enteric redmouth disease. With the help of 3-D scans, researchers have mapped how the fish are infected with the bacterium. The disease, which reduces fish well being and increases fish mortality in Danish fish farms, is harmless to humans.
Publ.Date : Wed, 05 Mar 2014 08:48:48 EST
Sea turtles' 'lost years' mystery starts to unravel
Small satellite-tracking devices attached to sea turtles swimming off Florida's coast have delivered first-of-its-kind data that could help unlock they mystery of what endangered turtles do during the 'lost years.'
Publ.Date : Tue, 04 Mar 2014 21:56:10 EST
High consumption of fish oil may benefit cardiovascular health, public health finds
Eating fish in amounts comparable to those of people living in Japan seems to impart a protective factor that wards off heart disease, according to an international study. Middle-aged Japanese men living in Japan had lower incidence of coronary artery calcification, a predictor of heart disease, than middle-aged white men living in the United States.
Publ.Date : Tue, 04 Mar 2014 10:24:26 EST
Fish bioluminescence: Distinctive flashing patterns might facilitate fish mating
Scientists have shown for the first time that deep-sea fishes that use bioluminescence for communication are diversifying into different species faster than other glowing fishes that use light for camouflage. The new research indicates that bioluminescence -- a phenomenon in which animals generate visible light through a chemical reaction -- could promote communication and mating in the open ocean, an environment with few barriers to reproduction.
Publ.Date : Tue, 04 Mar 2014 09:51:07 EST
Increased intake of fish can boost good cholesterol levels
The consumption of fish has long been known to be beneficial for health; however, the mechanisms by which fats and other useful nutrients found in fish work in the human body are not fully known. Now research confirms that increasing the intake of fatty fish increases the number of large HDL particles. People who increased their intake of fish to a minimum of 3-4 weekly meals had more large HDL particles in their blood than people who are less frequent eaters of fish. Large HDL particles are believed to protect against cardiovascular diseases.
Publ.Date : Mon, 03 Mar 2014 08:35:51 EST
Global warming felt to deepest reaches of ocean
A new study shows that the 1970s polynya within the Antarctic sea ice pack of the Weddell Sea may have been the last gasp of what was previously a more common feature of the Southern Ocean, and which is now suppressed due to the effects of climate change on ocean salinity.
Publ.Date : Sun, 02 Mar 2014 14:35:15 EST
Competition breeds new fish species, study finds
Size differences among fish and competition for breeding space lead to the formation of new species, according to a new study, but empirical evidence for this is scarce, despite being implicit in Charles Darwin’s work and support from theoretical studies. Speciation occurs when genetic differences between groups of individuals accumulate over time. In the case of Telmatochromis fish in Africa, subject of a new study, there are no obvious obstacles to the movement and interaction of individuals. But, the non-random mating between large- and small-bodied fish sets the stage for the evolutionary play.
Publ.Date : Fri, 28 Feb 2014 08:07:25 EST
Coral fish biodiversity loss: Humankind could be responsible
Literal biodiversity reservoirs, coral reefs and associated ecosystems are in grave danger from natural and human-made disturbances. The latest World Resources Institute assessment is alarming with 75% of coral reefs reported as endangered worldwide, a figure that may reach 100% by 2050. The numbers are concerning, particularly as coral reefs provide sustenance and economic benefits for many developing countries and fish biodiversity on coral reefs partly determines the biomass available for human consumption.
Publ.Date : Fri, 28 Feb 2014 08:07:16 EST
'Shark's eye' view: Witnessing the life of a top predator
Instruments strapped onto and ingested by sharks are revealing novel insights into how one of the most feared and least understood ocean predators swims, eats and lives. Scientists are also piloting a project using instruments ingested by sharks and other top ocean predators, like tuna, to gain new awareness into these animals' feeding habits. The instruments, which use electrical measurements to track ingestion and digestion of prey, can help researchers understand where, when and how much sharks and other predators are eating, and what they are feasting on.
Publ.Date : Thu, 27 Feb 2014 14:26:15 EST
Ancient 'great leap forward' for life in the open ocean: Cyanobacteria sheds light on how complex life evolved on earth
Plankton in the Earth's oceans received a huge boost when microorganisms capable of creating soluble nitrogen 'fertilizer' directly from the atmosphere diversified and spread throughout the open ocean. This event occurred at around 800 million years ago and it changed forever how carbon was cycled in the ocean.
Publ.Date : Thu, 27 Feb 2014 12:55:08 EST
Big thaw projected for Antarctic sea ice: Ross Sea will reverse current trend, be largely ice free in summer by 2100
A new modeling study suggests that a recent observed increase in summer sea-ice cover in Antarctica's Ross Sea is likely short-lived, with the area projected to lose more than half its summer sea ice by 2050 and more than three quarters by 2100. These changes will significantly impact marine life in what is one of the world's most productive and unspoiled marine ecosystems.
Publ.Date : Thu, 27 Feb 2014 11:55:12 EST
Importance of nutrients for coral reefs highlighted by scientists
Despite the comparably small footprint that they take on the ocean floor, tropical coral reefs are home to a substantial part of all marine life forms. Coral reefs also provide numerous benefits for human populations, providing food for millions and protecting coastal areas from erosion. Moreover, they are a treasure chest of potential pharmaceuticals and coral reef tourism provides recreation and income for many. Unfortunately, coral reefs are declining at an alarming rate. To promote management activities that can help coral reef survival, an international group of world renowned scientists have addressed the present knowledge about the challenges that coral reefs are facing now and in the future in a new article.
Publ.Date : Thu, 27 Feb 2014 09:20:24 EST
Spotted seal study reveals sensitive hearing in air and water
Two spotted seals orphaned as pups in the Arctic are now thriving at UC Santa Cruz's Long Marine Laboratory, giving scientists a rare opportunity to learn about how these seals perceive their environment. In a comprehensive study of the hearing abilities of spotted seals, researchers found that the seals have remarkably sensitive hearing in both air and water. "We wanted to develop a better understanding of how Arctic seals use sound in their environment and how human intrusions and other changes in that environment may influence them," the lead author noted.
Publ.Date : Wed, 26 Feb 2014 21:12:41 EST
Ambitious new pollution targets needed to protect Lake Erie from massive 'dead zone'
Reducing the size of the Lake Erie "dead zone" to acceptable levels will require cutting nutrient pollution nearly in half in coming decades, at a time when climate change is expected to make such reductions more difficult. That's one of the main conclusions of a comprehensive new study that documents recent trends in Lake Erie's health. It offers science-based guidance to policymakers seeking to reduce the size of toxic algae blooms and oxygen-starved regions called hypoxic zones, or dead zones—two related water-quality problems that have seen a resurgence in the lake since the mid-1990s.
Publ.Date : Wed, 26 Feb 2014 12:52:43 EST