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Samples collected in May showed sections of their DNA in the water in Piermont and Norrie Point as they moved from the Atlantic ocean to the freshwater Upper Hudson to spawn. Through analyzing water samples for small snips of DNA that the fish shed as they move through the estuary, we can track Atlantic sturgeon moving by our sections of the river. Hudson River Park in NYC, The Center for the Urban River at Beczak in Yonkers, Lamont’s Piermont Field Station team, and the Hudson River Estuary Program at Norrie Point are partnering for the third year in tracking a set of migratory species as they move through the estuary using environmental DNA or eDNA. While we will not be seeing these fish in our Saturday catch tally, we are tracking this amazing species with another tool, eDNA. Moving in along the river bottom, these iconic fish are heading to the Upper estuary to spawn. The majestic Atlantic sturgeon are also entering the Hudson at this time of year.

This is a wonderful partnership event with each site hosted by different organizations. For an interactive map and complete information on locations and times, please visit our event website. There will be 11 events hosted in the Lower estuary that will run at the times and locations noted on the graphic below. (Image by Peter Park) Where and When Will This be Happening? Nets, but their slim size allows them to easily slip through if not collected quickly for the count. Northern Pipefish are related to the lined seahorse, and are commonly pulled into our In the U.S., most of the fish we eat spend at least part of their lifecycle in estuaries. In addition to being calm, the shallow, nutrient-rich nature of estuaries offer a seemingly endless supply of food for young, freshly spawned fish. It is the connection between land and water, where the slowing of the water allows suspended materials rich in minerals and nutrients that wash in off the land to drop and settle, that creates valuable nurseries for many of our fish species. The calm, protected waters of an estuary can provide juvenile fish a place to ‘hide out’ and, put on a little size, before they move back into the larger ocean and a more challenging environment. The ocean is a vast space with a wide mix of predatory species of fish, and small, young of the year fish, can find this a very hostile environment. This event is a great way to celebrate National Ocean Month and to learn why the Hudson estuary is referred to as a vital ‘arm of the ocean’! Why Do Fish Chose Estuaries for Spawning? All the species are counted and then returned to the estuary to continue their role in the ecosystem. This will be our first Science Saturday event of the summer season. We will host a site at the Lamont Field Station at 200 Ferry Rd.

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On Saturday, June 10, at multiple locations throughout the Hudson and Harbor, groups will host free public events inviting participants a chance to pull a seine net along the shore, or drop in a fishing line from a pier, to see just what might be moving in the water.

We celebrate this seasonal cycle on the Hudson River with our annual World Fish Migration Day Event hosted by the Columbia Climate School’s Lamont-Doherty Earth Observatory and the New York State Department of Environmental Conservation. The slight warming of the water, the subtle lengthening of the daylight, and simple biologic triggers can send an assortment of saltwater fish inland to reproduce. Scientists and educators are at each site to share information about each species pulled in.Īs winter turns to spring each year, the change in seasons drives migratory fish from the world’s ocean into estuaries and freshwater tributaries to spawn.

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