Saving Seafood

Four-year forecasts possible for Hawaii bigeye tuna fishery

August 14, 2020 — Measuring the extent of microscopic ocean plant life around Hawaii could reliably predict bigeye tuna catch rates four years out for Hawaii’s deep-set longline fleet, according to a new study by researchers at the Pacific Islands Fisheries Science Center.

“Bigeye tuna are the primary target species of Hawaii’s most valuable commercial fishery, a longline fishery with landings that are valued at over $100 million and that account for nearly half the United States tuna landings,” NMFS scientists Phoebe A. Woodworth-Jefcoats and Johanna L. K. Wren wrote in their study, published July 22 in the journal Fisheries Oceanography.

“A reliable predictor of targeted species catch rates could help the fishery time fishing activity and plan capital improvements. It could also potentially inform adaptive management and facilitate ecosystem‐based fisheries management.”

Using routine oceanographic measurements including satellite data for sea surface chlorophyll and temperature, the researchers calculated the median size of microscopic plants, called phytoplankton, over the calendar year and the extent of the fishery area around the Hawaiian Islands.

Read the full story at National Fisherman

NOAA hires directors of offices of science and technology, sustainable fisheries

July 20, 2020 — NOAA has hired a new director of its Office of Science and Technology and director of its Office of Sustainable Fisheries.

Evan Howell, previously the deputy director for the Pacific Islands Fisheries Science Center, has been hired to head the Office of Science and Technology, where he will “advocate and ensure a sound scientific basis for NOAA Fisheries science programs and resource conservation and management decisions,” according to the agency. In his role, Howell will coordinate the work being done at six NOAA Fisheries science centers in the U.S. Northeast, Northwest, Pacific Islands, Southeast, Southwest, and Alaska.

Read the full story at Seafood Source

Feds Set to Address Management of Main Hawaiian Islands Uku, American Samoa Bottomfish and Longline Interactions with Protected Species

June 22, 2020 — The following was released by the Western Pacific Regional Fishery Management Council:

The Western Pacific Regional Fishery Management Council will convene June 22 to 25 to address management of main Hawaiian Island uku (grey snapper), American Samoa bottomfish and protected species interactions in the Hawai’i and American Samoa longline fisheries. The meeting will be held by video conference with host sites at the Hilton Guam Resort & Spa, Chuchuko Room, 202 Hilton Rd., Tumon Bay, Guam; Hyatt Regency Saipan, Royal Palm Ave., Micro Beach Rd., Saipan, CNMI; and Department of Port Administration, Airport Conference Room, Pago Pago International Airport, Tafuna Village, American Samoa. Instructions on connecting to Webex, agendas and briefing documents are posted at www.wpcouncil.org/meetings-calendars.

The uku (Aprion virescens, grey snapper) stock in the main Hawaiian Islands is not overfished nor subject to overfishing according to a NOAA Pacific Islands Fisheries Science Center. The fishery is considered to be data-rich, using a fishery-independent measure of biomass, length and local life history information gathered from the commercial and non-commercial sectors. The 2018 spawning stock was estimated to be 1.8 million pounds, which is 2¾ times the calculated sustainable threshold of 663,705 pounds. The Council will use the acceptable biological catch set by its Scientific and Statistical Committee (SSC) to specify the annual catch limit for the fishery for fishing years 2021-2024.

The 2019 assessment of the American Samoa bottomfish fishery indicates that the stock is overfished and subject to overfishing. The National Marine Fishery Service (NMFS) notified the Council of its obligation to end overfishing immediately and develop and implement within two years a plan that would rebuild the overfished stock within 10 years. The fishery harvests multiple species of varying depth range and has diverse life history characteristics for which information is sparse and borrowed from other areas. Data sources are creel surveys that estimate total catch and commercial receipt books that capture fish sold to the market. The SSC has recommended that the Council work with American Samoa to develop management options and explore effort and biological limits and area management, as any federal measure would apply to federal waters only, i.e., beyond 3 nautical miles from shore. The SSC also recommended that the bottomfish rebuilding plan include cultural harvest in the offshore banks for deep-water snappers. With the COVID-19 pandemic, data collection efforts have been reduced with unknown consequences on the quality of data that will represent fishing year 2020.

Endangered Species Act consultations are ongoing for the Hawai’i and American Samoa longline tuna fisheries regarding interactions with protected species. Based on available scientific information, the impact by these US longline fisheries is low compared to foreign fisheries and any measure implemented in these US fisheries is likely to have a limited effect on the population. The Hawai’i-based deep-set longline fishery targeting bigeye tuna and American Samoa longline fishery targeting albacore are monitored with 20% federal observer coverage.

Council Urges Reopening of Fishing Grounds Based on New False Killer Whale Study

March 12, 2020 — The following was released by the Western Pacific Regional Fishery Management Council:

A new study indicates that the pelagic stock of false killer whales around the Hawaiian Islands may be healthier than previously thought. Amanda Bradford of NOAA Pacific Islands Fisheries Science Center presented the research yesterday to the Western Pacific Regional Fishery Management Council, which has authority over fisheries in the US exclusive economic zone (EEZ, i.e., generally 3 to 200 miles offshore) of Hawai‘i and other US islands and territories in the Pacific. The Council is meeting this week in Honolulu.

In light of the new population estimates, the Council yesterday asked the National Marine Fisheries Service (NMFS) to explore reopening the Southern Exclusion Zone (SEZ), a 132,000-square-mile area spanning the entire EEZ south of the main Hawaiian Islands. Since 2012, the SEZ is closed to the Hawai‘i longline fishery when it interacts with two pelagic false killer whales that result in a mortality and serious injury determination by NMFS. The closed SEZ leaves only 17.8 percent of the EEZ around the Hawaiian Islands open to the fishery.

When the SEZ was implemented, the estimated population size of pelagic false killer whales allowed a maximum of nine individuals from the stock to be removed by means other than natural mortalities. Above that number could impair the stock’s ability to reach or maintain its optimum sustainable population, it was determined. The new estimates may indicate a need to modify that number.

The Council meeting continues today and tomorrow at the YWCA Fuller Hall, 1040 Richards St., Honolulu, from 8:30 a.m. to 5 p.m. To participate by web conference: Go to https://wprfmc.webex.com/join/info.wpcouncilnoaa.gov. For more information on the meeting, go to www.wpcouncil.org/meetings-calendars, email info@wpcouncil.org or call (808) 522-8220.

Scientists Set Acceptable Biological Catches for Mariana Archipelago Bottomfish, Recommend New Stock Assessment for Mariana and American Samoa Bottomfish

March 6, 2020 — The following was released by the Western Pacific Regional Fishery Management Council:

The Scientific and Statistical Committee (SSC) of the Western Pacific Regional Fishery Management Council concluded its three-day 135th meeting today in Honolulu. Key outcomes addressed the Mariana and American Samoa Archipelago bottomfish fisheries. The Council will consider and may take action on the SSC outcomes and other issues when it meets March 10 to 12 at the YWCA Atherton Hall, 1040 Richards St., Honolulu. For more information on these meetings, including a Fishers Forum on Hawai’i fisheries the evening of March 10, go to http://www.wpcouncil.org/meetings-calendars/ or contact the Council at info@wpcouncil.org or (808) 522-8220.

Mariana Archipelago Bottomfish Fisheries: The SSC set annual acceptable biological catches of bottomfish at 27,000 pounds in Guam and 84,000 pounds in the Commonwealth of the Northern Mariana Islands (CNMI) for fishing years 2020-2023. The specifications are based on a 2019 stock assessment by the NOAA Pacific Islands Fisheries Science Center (PIFSC), which found bottomfish to be overfished on Guam but not in the CNMI and the fisheries in both areas to be operating at sustainable levels of catch and effort. Previous stock assessments had determined that the stocks in both areas were healthy. The acceptable biological catches reflect what can be removed while allowing the stock to reproduce at levels of maximum sustainable yield. Based on creel survey estimates, Guam’s commercial and noncommercial bottomfish fisheries landed 27,781 pounds in 2016; 22,962 pounds in 2017; and 32,751 pounds in 2018; and CNMI landed 49,570 pounds in 2016; 46,290 pounds in 2017; and 858 pounds in 2018. Next week, the Council will develop annual catch limits for the fisheries based on the acceptable biological catch levels and management uncertainties. Catch limits may be equal to or less than the acceptable biological catch specifications.

American Samoa and Mariana Archipelago Managed Bottomfish Species: The SSC considered potential alternative groupings for managed bottomfish species caught in federal waters (i.e., seaward of state waters, which are 0 to 3 miles from shore) based on available biological and fishery data and the feasibility of conducting stock assessments. Currently, the bottomfish species in each island area are grouped together as a single bottomfish complex. During discussions, it was noted that the American Samoa stock assessment focused on the heavily exploited area around Tutuila and less around the more lightly exploited areas around the offshore seamounts and the Manu’a islands due to the way the data was collected. It was also noted that careful attention should be given to the definition of a bottomfishing trip, which currently is having bottomfishing gear onboard, because hand crank and electric reels are used for bottomfishing and for trolling. The SSC recommended that the Council request PIFSC to initiate a new benchmark stock assessment and to explore other modeling approaches and data sets aside from the creel surveys and commercial receipt books. An SSC member designee will work with PIFSC and Council staff to explore the deep and shallow species groupings, trip and gear definitions, and available data sources.

Reviewers Approve Stock Assessment for Hawai’i Gray Snapper, Emphasize the Need for Accurate Recreational Catch Data

March 2, 2020 — The following was released by the Western Pacific Regional Fishery Management Council:

In Hawai’i, consumers prefer deep-water snappers for their red and pink color, which has cultural significance especially around the winter holidays. However, in May and June, fishermen switch to target the less desired, but just as delicious, gray snapper, known locally as uku (Aprion virescens). During these months, uku are found in abundance at Penguin Bank, located between Moloka’i and O’ahu, where they likely aggregate to spawn.

The good news about uku in the main Hawaiian Islands is the stock is healthy. In fact, scientists at NOAA Pacific Islands Fisheries Science Center (PIFSC) recently determined that Hawai’i fishermen can continue to harvest uku without harming the stock’s ability to maintain its maximum sustainable yield. The PIFSC stock assessment for uku was reviewed this week by the Western Pacific Stock Assessment Review (WPSAR) panel, which ascertained that the assessment is sound and based on the best scientific information available.

Erik Franklin, PhD, University of Hawai’i at Manoa and chair of the WPSAR panel, presented the results today in Honolulu to a group of interested scientists, fishery managers and fishermen at the office of the Western Pacific Regional Fishery Management Council, where the five-day review was held. The WPSAR panel also included Yong Chen, PhD, University of Maine, and Yan Jiao, PhD, Virginia Tech. Gray snapper is a species managed offshore by the Council in both Hawai’i and American Samoa, where it is known as asoama.

The review contained recommendations to improve future stock assessments. “It can’t be emphasized enough, the importance of getting accurate recreational data for future assessments,” Franklin said.

Marc Nadon, one of the PIFSC stock assessment scientists, said the uku assessment utilized commercial catch data from 1948 to 2018. Since recreational catch data for the fishery is available only since about 2003, the scientists used data from 2003 to 2007 and applied it to the human population trend in Hawai’i to recreate the noncommercial data for the same period as the commercial data.

Recreational catch in Hawai’i is captured voluntarily for state waters (0 to 3 miles offshore) through the Hawai’i Marine Recreational Fishing Survey, run by the State of Hawai’i, with assistance from NOAA Fisheries. In federal waters (3 to 200 miles offshore), noncommercial permits and reporting are required for bottomfish but only a few fishermen have complied.

Uku is found in depths of 0 to 600 feet and is caught mainly by deep-sea and inshore handline and by trolling. Look for it in the markets this spring as an alternative to mahimahi and ono (wahoo) while you wait for ahi (yellowfin tuna) to return to the islands in the summer.

For more information, contact the Council at (808) 522-8220 or by email at info.wpcouncil@noaa.gov.

NOAA concerned with parasite that kills monk seals that’s spread by cat feces

February 21, 2020 — Toxoplasmosis, a parasite found in cat-feces is threatening the survival of Hawaiian Monk Seals. It’s deadly and it works quickly. According to scientists with the National Oceanic Atmospheric Administration, it can kill within 48 hours. It’s listed as one of the top three threats against the endangered species.

Dating back to the 90’s, NOAA reports at least 12 seals have died because of Toxoplasmosis. There’s no exact count because not every corpse has been recovered.

“That doesn’t sound like a very high number but when there’s only 250 to 300 animals in the population that are being impacted by this, it’s significant,” Charles Littnan, Protected Species Division Director, NOAA Pacific Islands Fisheries Science Center, said.

It spreads when cat feces are washed into the ocean, contaminating the water. One seal was killed last month. Another, Pohaku, is recovering after a bystander spotted her logging or floating in the water.

Read the full story at KITV

The “Why” of WHICEAS, the Winter Hawaiian Islands Cetacean and Ecosystem Assessment Survey

January 21, 2020 — The following was released by NOAA Fisheries:

Cetacean researchers from the Pacific Islands Fisheries Science Center are embarking on a winter research cruise. It’s called the Winter Hawaiian Islands Cetacean and Ecosystem Assessment Survey (WHICEAS, pronounced “why-sees”). They will study cetaceans (whales and dolphins) and seabirds around the main Hawaiian Islands aboard the NOAA Ship Oscar Elton Sette from January to March. This is a time of year they haven’t previously studied.

This winter survey provides an opportunity to focus on baleen whales such as humpback whales that generally migrate into Hawaiian waters during that period. It will also allow us to examine changes in density of other species between winter and summer. We will use traditional cetacean survey methods such as visual observations and acoustic detections.

The Sette will traverse along a systematic survey grid, but will also deploy Drifting Acoustic Spar Buoy Recorders. These recorders are attached to hydrophones nearly 500 feet (150 meters) deep. These buoys passively drift with the currents and collect acoustic recordings. They provide more detailed records of cetaceans even after the ship has moved to other portions of the study area. The depth of the hydrophones improves our ability to detect beaked whales since they spend much of their time at depth. It also helps us detect the low frequency calls of baleen whales that are missed by our towed hydrophone array.

Read the full release here

NOAA ship to conduct research, hydrographic survey of NMI reefs, slopes

December 9, 2019 — Between April and August 2020, the National Oceanic and Atmospheric Administration said its 231-foot survey and research ship, Rainier, will conduct research and a hydrographic survey of the reefs and slopes surrounding the Mariana Islands Archipelago.

A team of researchers and scientists will be aboard the ship.

Noriko Shoji, Science Operations Division director of NOAA-National Marine Fisheries Service-Pacific Islands Fisheries Science Center, said the Rainier will operate 24 hours a day and will use research equipment and deploy divers.

According to NOAA, the operations of the ship also include “two 28-foot hydrographic survey launches as well as two dive platform vessels that will be working concurrently with the ship to study coral reef health and obtain high-resolution depth measurements of the seafloor.”

Shoji said they’re hoping to obtain “detailed depth information and seafloor characterization which will be useful in determining fisheries habitat, understanding coral reef health as well as marine geologic processes.”

Shoji added that updating the nautical charts will also help ensure safe ocean navigation.

Read the full story at Marianas Variety

Newly Identified Fish Nurseries Are Choked With Plastic

November 13, 2019 — Plenty of heartbreaking stories about turtles, seabirds and whales found dead with dozens of plastic bits in their stomachs have surfaced in recent years. But a new study reveals that it’s not just adult sea animals that are getting a gullet full of plastic. Larval fish are inundated with plastic fragments in their nursery habitats and they’re eating those pieces along with their natural food sources, according to the paper published in the journal PNAS.

The finding comes from a recent study looking at where baby fish spend their time. An international team of scientists joined up with NOAA’s Pacific Islands Fisheries Science Center to study an ocean habitat called surface slicks, or long lines of smooth water found paralleling coastlines that are created when internal ocean waves converge.

To do that, the team used remote sensing data to identify slicks along the coast of Hawaii then used tow surveys to scoop up plankton and larval fish in them. They found that larval fish prefer to congregate in slicks, which have lots of tasty zooplankton.

The team found the slicks have more eight times as many larval fish as surrounding waters and act as de facto fish nurseries for the first few months of a fish’s life cycle.

“We found that surface slicks contained larval fish from a wide range of ocean habitats, from shallow-water coral reefs to the open ocean and down into the deep sea—at no other point during their lives do these fish share an ocean habitat in this way,” says study co-author Jonathan Whitney, a NOAA marine ecologist, says in a press release. “Slick nurseries also concentrate lots of planktonic prey, and thereby provide an oasis of food that is critical for larval fish development and survival.”

Read the full story at Smithsonian.com