Erosion caused by spawning salmon could make mountains significantly…

Alaska Dispatch News – When salmon spawn, the females build nests (or "redds") by turning onto their sides and flapping their tails to stir up sediment. That can expose the riverbed and lead to erosion nearby and downstream. Such erosion is a well-studied phenomenon, but what is the effect over millennia? A study recently published in the journal Geomorphology found that over time, Read More…

‘Left-handed’ fish and asymmetrical brains

Phys Org – To humans, being right-handed or left-handed plays an important role. The majority of people are right-handed, while only about 3 percent of people innately use both hands equally well. Preferring one side of the body over another is not unique to humans: the phenomenon occurs in the animal kingdom as well, for instance in great apes or birds, although their "handedness" is Read More…

Biology professor spends nights making babies — salmon babies, that…

CBC News – A biology professor at Memorial University has been busy this fall, spending several late nights making thousands of babies — salmon babies that is. Salmon daddy Craig Purchase is the coordinator for a project that is looking to reintroduce Atlantic salmon into Rennie's River in St. John's, an effort that has been ongoing for the last six years. The complicated process Read More…

Research sheds light on how to better manage small-scale fisheries

EDF – Small scale fisheries are critically important for the provision of food security, livelihoods, and economic development for billions of people. Most of these fisheries appear to be under-performing with respect to conservation, food production, revenue, and the quality of the livelihoods they can support. Many factors related to successful small-scale fisheries management have been Read More…

A robotic spy among the fish

Phys Org – A new miniature robot developed by EPFL researchers can swim with fish, learn how they communicate with each other and make them change direction or come together. These capabilities have been proven on schools of zebrafish. Researchers at EPFL's Robotic Systems Laboratory (LSRO), which is headed by Professor Francesco Mondada, have developed a miniature robot that can Read More…

Researcher links salmon sex to geological change

Phys Org – It turns out that sex can move mountains. A Washington State University researcher has found that the mating habits of salmon can alter the profile of stream beds, affecting the evolution of an entire watershed. His study is one of the first to quantitatively show that salmon can influence the shape of the land. Alex Fremier, lead author of the study and associate professor Read More…

Fish respond to predator attack by doubling growth rate

University of Wisconsin-Madison – Scientists have known for years that when some fish sense predators eating members of their species, they try to depart the scene of the crime and swim toward safer waters. This sensible behavior is exactly what evolution would be expected to produce. Now, a group at the University of Wisconsin–Madison has shown a second, equally sensible result of the Read More…

Fish Shrinking In Size As Ocean Temperatures Rise, Study Finds

Study Finds – Warmer water means smaller fish, a new study finds, which could mean smaller paychecks for many Atlantic and Gulf of Mexico fisherman. The little silver fish known as menhaden — which National Geographic has called “arguably one of the most important fish in the sea”— has shrunk in average size by around 15 percent over the last 65 years according to the Louisiana Read More…

Study Looks At How North Pacific Atmospheric, Ocean Circulation…

The Columbia Basin Bulletin – Productivity of wild chinook salmon from the Columbia River to northern Alaska is subject to large-scale atmospheric and ocean circulation trends, especially the North Pacific Gyre Oscillation, according to a recent study. Other studies of coho, pink and sockeye salmon stocks have found that trends in productivity for these stocks have more to do with Read More…

Science Advancements Key to Increasing Management Value of Life Stage…

Sac Francisco Estuary & Watershed Science – A robust monitoring network that provides quantitative information about the status of imperiled species at key life stages and geographic locations over time is fundamental for sustainable management of fisheries resources. For anadromous species, management actions in one geographic domain can substantially affect abundance of Read More…