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Chesapeake Bay Foundation’s Menhaden Blame Game Isn’t Backed by CCB Findings

October 8, 2025 — The following was released by Ocean Harvesters:

As Virginians, we share the public concern about the poor 2025 osprey breeding results reported by the Center for Conservation Biology (CCB). But the Chesapeake Bay Foundation’s (CBF) attempt to pin those outcomes on the menhaden fishery misstates the timeline, overextends the CCB advisory’s inferences, and ignores other environmental factors that CCB itself noted.

What CCB actually reported

CCB’s news advisory organizes 2025 results by salinity (used as a proxy for local fish communities) and finds that higher-salinity sites had low productivity while low-salinity sites exceeded population-maintenance thresholds. CCB explicitly states “salinity is a proxy for the fish community” and that ospreys in high-salinity areas are believed to rely more on menhaden. CCB also documents many pairs that did not lay clutches in 2025, arriving on time in late February-early March, then abandoning territories in significant numbers, with many returning in June (a first for the Bay population). Finally, CCB notes that food stress showed up as single-chick broods (67% of broods in waters with salinity levels above 5 parts per thousand) and widespread post-hatch losses.

A presentation given by US Geological Survey scientists to the Menhaden Board of the Atlantic States Marine Fisheries Commission in August 2024 shows that past research, including research by CCB Director Dr. Bryan Watts, identified other species as being the primary prey of osprey in the higher salinity areas of the Bay. To make the leap that menhaden is the singular problem is not supported by the data.

  • By Virginia law, purse-seine fishing for menhaden is closed until the Sunday before the first Monday in May (i.e., there is no fishing until early May).
  • According to Ocean Harvesters’ fleet logs provided to state regulators, menhaden fishing did not begin in the Bay until the week of May 26 in 2025, reflecting late arrival/availability of menhaden that is controlled by nature.
  • CCB states in a photo caption that: “Most young that starve in the nest die within the first two weeks after hatching.” If chicks hatch in April/early May, those deaths occur before fishing started.
  • CCB records pairs arriving late February-early March; many never laid eggs at all, events that obviously precede any fishing and indicate that birds may not return to the area in good health.

Taken together, CCB’s description of timing, plus the dates of the legal fishing season, make clear that early nest failures and the chick mortalities in the first two weeks after hatching occurred before the menhaden fishery began harvesting.

Where CBF goes beyond the CCB advisory

The Chesapeake Bay Foundation’s press statement asserts that CCB’s results “indicate insufficient local food availability in areas where the osprey diet relies on forage fish like menhaden.” CBF points to a decline in bait landings and juxtaposes those figures with the industrial reduction fishery’s annual catch to imply cause and effect.

That is CBF’s biased interpretation, not CCB’s conclusion. CCB does not directly blame the menhaden fishery; it infers food limitation from breeding metrics and salinity as a prey proxy.

  • CCB itself reports weather-related nest losses (high winds, extended rains) and notes that even low-salinity areas performed worse than recent years, evidence that multiple environmental drivers were at work in 2025.
  • Ospreys are generalist fish-eaters that take a range of species of suitable size; when menhaden aren’t present inshore, ospreys use other prey (e.g., gizzard shad, catfish). CCB’s map/photo captions and standard references reflect this dietary flexibility.
  • Fleet operations and observations indicate menhaden have arrived late in recent years, a function of environmental conditions, not fishing. The fishery has no mechanism to delay migration or in-Bay availability.
  • While menhaden bait landings may be lower in the Bay than in the past, CBF fails to consider the level of effort. There are documented instances of pound netters who have stopped fishing over the past few years through a combination of factors including higher costs for equipment and the inability to find dependable (and affordable) labor.
  • Bait landings reflect harvest effort and market conditions and are not a direct measure of local fish abundance or near-shore availability to osprey.

CCB’s 2025 advisory shows food stress signals in higher-salinity waters, but the timing and the text do not support CBF’s misleading narrative that the regulated menhaden fishery caused this year’s early nest failures and first-weeks chick mortalities. Those events occurred before the season opened and menhaden boats were still at the dock. Environmental factors, weather-driven nest losses (high winds/extended rains) and widespread post-hatch starvation, are plainly implicated in CCB’s account and must be part of any honest discussion, despite the self-interested view of a special interest group like the CBF.

About Ocean Harvesters
Ocean Harvesters owns and operates a fleet of more than 30 fishing vessels in the Atlantic Ocean and Gulf of Mexico. The company’s purse-seine fishing operation is exclusively engaged in the harvest of menhaden, a small, nutrient-dense fish used to produce fish meal, fish oil, and fish solubles. Both its Atlantic and Gulf Menhaden fisheries are certified sustainable by the Marine Stewardship Council. Committed to responsible fishing operations, Ocean Harvesters is proud to be heir to a fishing legacy that extends nearly 150 years.

USGS Challenges Simple Narrative Linking Menhaden to Osprey Decline

May 5, 2025 — The following was released by the Menhaden Fisheries Coalition:

A letter from the U.S. Geological Survey (USGS) sent last week to the House Natural Resources Committee indicates multiple environmental stressors—not just prey availability—are responsible for recent osprey reproduction issues in the Chesapeake Bay. The USGS’ conclusions challenge narratives pushed by menhaden fishery opponents, including a widely publicized study by Dr. Bryan Watts of the Center for Conservation Biology, which linked a decline in osprey reproduction in Virginia’s Mobjack Bay to reduced availability of menhaden.

Menhaden increase in osprey diets is statistically insignificant

Specifically, the USGS finds that the Watts et al. (2024) study did not demonstrate a biologically significant change in the proportion of menhaden in the osprey diet over time. The agency also noted that menhaden made up a slightly higher portion of the diet in 2021 compared to 2006–07, although the difference is statistically insignificant. “Although the proportion of Menhaden as a percentage of total diet in 2021 is numerically larger than the 2006–07 value, the two values are bounded by overlapping error bars, and are thus not different in a biologically meaningful way,” the letter stated.

“The amount of food delivered to young in a nest can be influenced by many factors, including prey abundance, access to prey, … increased predation risk, parental condition, brood size, and adverse weather conditions,” said the USGS letter, which was delivered on May 2. “Ecological systems such as this are complex and occur at large scales that make it difficult and sometimes not possible to measure and accurately estimate the influence of all contributing factors.”

Chesapeake osprey trends also seen around the country

Following bird conservation measures including the banning of DDT, the Atlantic Coast osprey population increased by nearly 600% between 1966 and 2022. In the Chesapeake Bay, it has increased by about 1800% since 1960. While scientists have observed a leveling off of osprey populations between 2012 and 2022, populations remain high by historical standards. Furthermore, the USGS reports that this trend has been observed in numerous other locations including Florida, South Carolina, North Carolina, and Delaware, as well as the Pacific Coast, raising serious questions about any impact from the menhaden fishery since there is no menhaden fishery in those locations.

Overfished Striped Bass also an important food source for osprey

The USGS also identifies striped bass as an important food source for osprey in parts of the Chesapeake Bay and notes that the status of this stock may influence osprey reproduction. “Preliminary observations made by USGS scientists during a 2024 Osprey nesting study in the vicinity of the Choptank River suggest Menhaden and Striped Bass may be the primary prey type there,” the letter states. It further explains that “the principal contributing factor to poor breeding performance was loss of young due to starvation,” likely caused by “limited prey capture and/or prey delivery to nests.” Additionally, the letter notes that “the USGS has included Striped Bass among the list of prey species captured and consumed by Osprey at some Chesapeake study sites,” and concludes that “many of the factors that affect the status of the Striped Bass stock in the Chesapeake could also have direct or indirect effects on Osprey reproduction.”

The Atlantic States Marine Fisheries Commission (ASMFC) has found that Atlantic striped bass are currently overfished, with spawning stock biomass below the sustainable threshold as of the most recent assessment. Over the past decade, recreational fishing—particularly in the Chesapeake Bay—has been the primary driver of striped bass mortality, accounting for the vast majority of total removals, including substantial losses from catch-and-release mortality¹. The ASMFC has repeatedly cited recreational release mortality as a major factor in the species’ decline² and has responded with new management measures aimed at rebuilding the stock by 2029³.Conversely, the Atlantic menhaden fishery has repeatedly been found to be healthy and sustainably managed. The most recent stock assessment by the Atlantic States Marine Fisheries Commission in 2022 found menhaden is not overfished and overfishing is not occurring. The fishery has been certified sustainable by the Marine Stewardship Council, the gold standard for seafood sustainability, since 2019.

Osprey nesting sites in the Chesapeake are now at a surplus

The USGS scientists reported that the number of breeding pairs in the Chesapeake Bay increased from approximately 1,450 pairs in 1973 to around 10,000 pairs in 2020—an increase of nearly 600 percent. “All estimates indicate that the density of breeding pairs of Osprey in the Chesapeake has grown substantially since the 1970s,” the letter states. It also notes that “there are many natural structures, duck blinds, and manmade platforms suitable for nesting Osprey in the Chesapeake,” and that “Osprey nesting sites in the Chesapeake are now at a surplus and unused platforms are frequently being taken over by Canada Geese.” While the letter does not conclude that the population has exceeded environmental limits, it acknowledges that “as a natural population regulation process,” higher osprey densities increase competition for limited resources such as food and nesting sites, and that “growth usually continues until the population reaches the maximum population size the environment can support.”

VIMS also found no clear relationship with menhaden

Last fall, scientists from the Virginia Institute of Marine Science (VIMS) also found that the Watts study did not “establish a clear relationship with menhaden abundance and availability.” Both the original Watts study⁴ and the VIMS rebuttal⁵ were published in the journal Frontiers in Marine Science.

The USGS findings make clear that osprey reproduction is shaped by a wide array of environmental factors—and that no single fishery can shoulder the blame. The letter shows that blaming the menhaden fishery for complex ecological trends in osprey populations oversimplifies the science and misleads the public. Moreover, the overfished status of striped bass—driven largely by recreational fishing—may also be a contributing factor.

Footnotes

¹ Atlantic States Marine Fisheries Commission. Atlantic Striped Bass Stock Assessment Update. October 2022.

² Atlantic States Marine Fisheries Commission. Amendment 7 to the Atlantic Striped Bass Interstate Fishery Management Plan. May 2022.

³ Atlantic States Marine Fisheries Commission. Addendum II to Amendment 7. January 2024.

⁴ Watts Bryan D. , Stinson Christine H. , McLean Peter K. , Glass K. Andrew , Academia Michael H. , Byrd Mitchell A. (2023). Prey provisioning and diet of Osprey in lower Chesapeake Bay: A comparative study. Frontiers in Marine Science.
https://www.frontiersin.org/articles/10.3389/fmars.2023.1284462/full

⁵ Latour Robert J. , Gartland James , Ralph Gina M. (2024). Commentary: Prey provisioning and diet of Osprey in lower Chesapeake Bay: A comparative study. Frontiers in Marine Science.
https://www.frontiersin.org/articles/10.3389/fmars.2024.1416687/full

The COVID-19 Slowdown Will Show Whether Quieter Seas Help Killer Whales

June 30, 2020 — Deborah Giles and her dog are on a mad search for floating poop. Killer whale poop, to be precise.

Giles, a killer whale biologist at the University of Washington’s Center for Conservation Biology, is cruising the Strait of Juan De Fuca, a roughly 15-mile-wide inlet between Canada’s Vancouver Island and Washington state. The coastal waterway is a hotspot for migrating killer whales. Lately, the waters have been calmer and quieter because of boating and border restrictions enacted in the wake of COVID-19. That is why Giles has brought her scat-tracking dog, Eba, who will sniff the air as the boat cruises then start licking her lips, whining, and barking as they get closer to killer whale excrement.

These buoyant, information-rich fecal samples ready for collection. Giles wants to know if the hushed waters are helping whales relax. “It’s just such a novel situation where we just don’t have people going out on their boats,” she says. “It’s markedly different.”

Read the full story at Smithsonian Magazine

Scientists Working On Orca Recovery Not Surprised By Recent Tragedies

August 7, 2018 –A multitude of factors are harming Puget Sound’s local population of endangered orcas: water pollution, noise, loss of habitat.

But topping that list right now for many scientists is recovery of their primary food source: Chinook salmon.

The tragic scenes captured on the water over the past week – of the grieving orca J35 incessantly carrying her deceased calf, and of 4-year-old J50 ill and starving –  are sad events, but not surprising to scientists working on orca recovery.

They say they established years ago that when Chinook salmon are scarce, local orcas become sick and unable to effectively reproduce.

“This is just a really conspicuous example of it,” said Sam Wasser, who directs the Center for Conservation Biology at the University of Washington.

He’s part of a team of scientists that has done DNA and hormone analysis of orca scat collected by sniffer dogs. They’ve proved that when pregnant orcas are low on food and start metabolizing their blubber, toxins are released into their bloodstream that cause them to miscarry.

Read the full story at KNKX

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