Written by Jen Finn
A 10-year study of Chesapeake Bay fishes by researchers at William & Mary's Virginia Institute of Marine Science provides the first quantitative evidence on a bay-wide scale that low-oxygen "dead zones" are impacting the distribution and abundance of "demersal" fishes — those that live and feed near the Bay bottom.
The affected species — which include Atlantic croaker, white perch, spot, striped bass, and summer flounder—are a key part of the Chesapeake Bay ecosystem and support important commercial and recreational fisheries.
The study, published in a recent issue of Marine Ecology Progress Series, was authored by Andre Buchheister, a Ph.D. student in William & Mary's School of Marine Science at VIMS, along with VIMS colleagues Chris Bonzek, Jim Gartland, and Dr. Rob Latour.
All four authors are involved in VIMS' Chesapeake Bay Multi-Species Monitoring and Assessment Program (ChesMMAP), an ongoing effort to track and understand interactions between and among fishes and other marine life within the Bay ecosystem.
Buchheister says "This is the first study to document that chronically low levels of dissolved oxygen in Chesapeake Bay can reduce the number and catch rates of demersal fish species on a large scale." He notes that other studies have looked at the effects of low oxygen on fishes within the water column and on demersal fishes within individual Bay tributaries.
Low-oxygen conditions—what scientists call "hypoxia"—form when excessive loads of nitrogen from fertilizers, sewage, and other sources feed algal blooms in coastal waters. When these algae die and sink, they provide a rich food source for bacteria, which in the act of decomposition take up dissolved oxygen from nearby waters.
Read the full story at the Williamsburg Yorktown Daily>>
National Fisherman Live: 3/10/15
In this episode, Online Editor Leslie Taylor talks with Mike McLouglin, vice president of Dunlop Industrial and Protective Footwear.
National Fisherman Live: 2/24/15
In this episode:
March date set for disaster aid dispersal
Oregon LNG project could disrupt fishing
NOAA tweaks gear marking requirement
N.C. launches first commercial/recreational dock
Spiny lobster traps limits not well received
The Mid-Atlantic Fishery Management Council has scheduled a series of scoping hearings to gather public input for a proposed action to protect unmanaged forage species.
The proposed action would consider a prohibition on the development of new, or expansion of existing, directed fisheries on unmanaged forage species in the Mid-Atlantic until adequate scientific information is available to promote ecosystem sustainability.Read more...
The National Marine Educators Association has partnered with NOAA this year to offer all NMEA 2015 conference attendees an educational session on how free NOAA data can add functionality to navigation systems and maritime apps.
Session topics include nautical charts, tides and currents, seafloor data, buoy networking and weather, among others.Read more...