Dining out: Fish switch from an aquatic to a terrestrial-based diet in streams impacted from metal contamination

In this post Justin Pomeranz and David Walters discuss their recent paper ‘Aquatic pollution increases use of terrestrial prey subsidies by stream fish’ Have you ever walked next to a high elevation, Rocky Mountain stream? Picked your way through downed trees, pushing your way through thick willows, listening to the water pour and bounce over rocks and settle into plunge pools? Have you ever fished … Continue reading Dining out: Fish switch from an aquatic to a terrestrial-based diet in streams impacted from metal contamination

The effects of seals on Scottish cod stock recovery

In this post Robin Cook discusses his recent paper with Steven Holmes and Robert Fryer ‘Grey seal predation impairs recovery of an over-exploited fish stock’ Both seals and humans prey on fish and so potentially compete for the same resource. Such competition is vividly illustrated in the controversy surrounding the effect grey seals have on cod in a number of regions including Canada and the … Continue reading The effects of seals on Scottish cod stock recovery

Where the eel was: applying historical data to plan a species recovery

 In this post Miguel Clavero writes about his recent paper with Virgilio Hermoso: “Historical data to plan the recovery of the European eel” Once there were European eels all around. Plenty of them. From its breeding grounds around the Sargasso Sea the eel used to colonize European and Northern African aquatic systems in such numbers that it lead to one of the few commercial freshwater … Continue reading Where the eel was: applying historical data to plan a species recovery

From economy to ecological management: Portfolio theory enlightens the performance of social-ecological systems

This guest post from David Angeler (@DGAngeler), Associate Editor for Journal of Applied Ecology on the paper “Performance of salmon fishery portfolios across western North America” by Jennifer Griffiths et al. (@JenAquatic @mark_scheuerell @SteveLindley831) Ecologists and managers are well aware of the reciprocal dependence of systems between people and nature. However, the linkages between social-ecological systems are complex and therefore difficult to measure. This limits … Continue reading From economy to ecological management: Portfolio theory enlightens the performance of social-ecological systems

Eyes in the sky see the secrets of the sea

This guest post is by Kylie L. Scales (@KylieScales) on her recent review paper “On the Front Line: frontal zones as priority at-sea conservation areas for mobile marine vertebrates.” The oceans may seem like Earth’s last remaining wilderness, but are in fact teeming with human activity as a result of intense and growing demand for marine resources. Consequently, large marine vertebrates such as seabirds, turtles, … Continue reading Eyes in the sky see the secrets of the sea

Managing native fish with environmental flows

Flow alteration is one of the most common threats to rivers and streams around the world. Alterations such as weirs, dams and water withdrawal for human uses tend to suppress natural flow variation causing a disconnection between rivers and floodplain wetlands. These changes to the natural hydrology of rivers can have detrimental effects for fish communities because many species of fish rely on periodic access to … Continue reading Managing native fish with environmental flows