Saving Seafood

2021 Coastal Survey Catches Nearly 2,500 Atlantic Sharks

July 14, 2021 — The following was released by NOAA Fisheries:

Sandbar sharks were the most common shark caught during the 2021 Large Coastal Shark Bottom Longline Survey. This survey of large and small coastal sharks was conducted from April 12 to May 28 by scientists from the Northeast Fisheries Science Center’s Apex Predators Program.

The survey is conducted in U.S. waters from Florida to the mid-Atlantic area every two to three years to provide relative abundance indices of coastal shark populations. Working from the contracted commercial longline vessel F/V Eagle Eye II, scientists from the center’s Narragansett Laboratory in Rhode Island and vessel crew caught 2,462 sharks of 11 species. The vessel left Port Royal, South Carolina to begin the survey just south of Fort Pierce, Florida. The survey ended at the North Carolina–Virginia border.

“We had a lot of weather delays this year, but we were still able to complete the majority of stations we cover each survey,” said Cami McCandless, who along with Lisa Natanson were the two scientists on board for the survey. Both are from the center’s Apex Predators Program based at the Narragansett Laboratory. Natanson has been the chief scientist on this survey since its inception in 1996. She retired in 2020 but returned this year to help lead the survey one last time before handing over the reins.

“The survey was designed to sample coastal sharks just prior to their northward migration along the coast,” Natanson said. “The 47-day survey consistently occurs in early to mid-April and ends at the Memorial Day weekend. Since the inception of the survey, there has been an increase in weather days. This has resulted in a decrease in the number of stations although the geographic extent of the survey has remained the same over the years.”

Read the full release here

Updated Shark Tagging Atlas Provides More than 50 Years of Tagging and Recapture Data

February 3, 2020 — The following was released by NOAA Fisheries:

A 52-year database of the distribution and movements of 35 Atlantic shark species revealed new information on some of the least known species. It also uncovered a few surprises about where sharks go and how long they live.

Scientists collected data for sharks tagged and/or recaptured between 1962 and 2013. The sharks were found in the Atlantic Ocean and associated areas, including the Gulf of Mexico, the Caribbean Sea, and the Mediterranean Sea. Participants tagged a total of 229,810 sharks of 35 species and recaptured 13,419 sharks of 31 species in that time span. The scientific journal Marine Fisheries Review recently published the data.

This new atlas updates an earlier version covering 1962 to 1993 and adds information on 22 species. Detailed profiles are provided for 14 shark species, including bull and tiger sharks and smooth dogfish. The updated data significantly extended their known ranges and movements.

The Cooperative Shark Tagging Program is the largest and longest-running in the world. The program is a collaborative effort among recreational anglers, the commercial fishing industry, biologists, and NOAA Fisheries. Its goal is to study the life history of sharks in the Atlantic Ocean.

Initiated in 1962 by biologist and shark researcher John “Jack” Casey at the Northeast Fisheries Science Center, the original group of 74 volunteer anglers began participating in the project in 1963. Since then the program has expanded to include thousands of participants along the entire North American and European Atlantic coasts, including the Gulf of Mexico.

“The program’s long-term data has shown the importance of tagging large numbers of each species and recording information in a database to determine shark movements,” said Lisa Natanson, a shark researcher in the Apex Predators Program at the Northeast Fisheries Science Center’s Narragansett Laboratory in Rhode Island. For example, until the tagging program was 34 years old, no one knew that tiger sharks cross the Atlantic.

Read the full release here