When it comes to fish food webs, the basic narrative is that the bigger the fish, the bigger its prey. In fact, one of the measurements scientists often use to determine a predator’s potential diet is “gape size” which calculates, quite literally, the biggest possible thing a fish can fit into its mouth. But such …
This Saturday, April 21st, is World Fish Migration Day – a day to celebrate the incredible journeys that fishes undertake each year to spawn and continue their species’ existence. World Fish Migration Day is “a one day global celebration to create awareness on the importance of open rivers and migratory fish.” Hundreds of events are planned all across …
by Kat Kerlin (UC Davis) Walleye, an iconic native fish species in Wisconsin, the upper Midwest and Canada, are in decline in northern Wisconsin lakes, according to a study in the Canadian Journal of Fisheries and Aquatic Species The study does not pinpoint the exact causes for the decline, though it suggests it is likely a combination of …