Tag Archives: Dead Zone

Gulf dead zone bigger than ever, affecting shrimping

The Gulf of Mexico’s dead zone – an area starved of oxygen that cannot support life – has reached the largest size documented since mapping began 35 years ago, researchers maintain in a new report. The dimensions – this year the size of New Jersey – are of particular concern because they appear related to concerns expressed by shrimpers about their catch, particularly in Terrebonne Parish waters. “They may be catching some close to shore,” said Dr. Nancy Rabalais, the oceanographer who pioneered Gulf dead zone research and who compiled the most recent report on its effects. “But they are not going to get anything between Terrebonne Bay and 25 or 35 miles offshore.” That’s bad news, with the 2017 white shrimp season fast approaching. click here to read the story 14:49

Price spikes for jumbo shrimp blamed on Gulf of Mexico dead zone

Every spring and summer when the low-oxygen dead zone forms off Louisiana’s coastline, the price of jumbo shrimp briefly spikes, affecting Gulf of Mexico fishers, consumers and seafood markets, according to a new study published Monday (Jan. 30) in the Proceedings of the National Academy of Sciences. And the price for smaller shrimp generally falls. The positive effect of the price increase on jumbo shrimp for Gulf commercial shrimpers are fleeting, however. That’s because the rise often triggers increased imports of large shrimp from foreign producers, including farm-raised shrimp, which quickly drive down prices. The dead zone is an area of low oxygen — with levels of oxygen at or below 2 parts per million — that scientists define as hypoxia. Freshwater rich in nitrogen and phosphorus from Midwest farms and from nutrient-rich sewage from cities and rural areas enters the Gulf each spring and summer, forming a freshwater layer over the Gulf’s saltier sea water. Read the full story here 18:41

This year’s dead zone in the Gulf of Mexico covers an area the size of Connecticut

The dead zone covers a large area of the Gulf but is not as large as scientists originally predicted, according to Nancy Rabalais, executive director of LUMCON, the Louisiana Universities Marine Consortium, and head of the dead zone research cruise. [email protected]

New Virginia Institute of Marine Science study shows ‘dead zone’ impacts Chesapeake Bay fishes

The study, published in the May 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.  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. [email protected]

How big will the Gulf Dead Zone get this year?

 LiveScience -The predicted size of this year’s Gulf of Mexico Dead Zone depends on whom you ask. One forecast model predicts an unusually small area of oxygen-depleted water, while another predicts an extent in line with the recent average.  continued