News tagged with population

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How reliable are traditional wildlife surveys?

To effectively manage a wildlife species, one of the most basic things you need to know is how many of them are out there. However, it's almost never feasible to count every single individual—so how do the results of wildlife ...

date15 hours ago in Ecology
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Winter sets up breeding success: study

For migratory birds, breeding grounds are where the action is. But a new study by University of Guelph biologists is among the first to suggest that the number of songbirds breeding during spring and summer depends mostly ...

dateMar 20, 2017 in Ecology
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What's cuing salmon migration patterns?

The spring-fed water that flows through Hansen Creek in southwestern Alaska is almost always clear. Its rate and temperature stay relatively constant throughout the year. Each summer, sockeye salmon migrate through the shallow, ...

dateMar 20, 2017 in Ecology
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Barn swallow behavior shift may be evolutionary

Most of our understanding about evolutionary changes and the formation of new animal species is based on the historical record. But a relatively new population of barn swallows in Argentina may help scientists see those changes ...

dateMar 17, 2017 in Evolution
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