Longlines Hook False Killer Whale, Threatening Hawai‘i Population

Conservation groups urge immediate implementation of protection plan


David Henkin, Earthjustice, (808) 599-2436, ext. 6614


Brendan Cummings, Center for Biological Diversity, (951) 768-8301

Earlier this week, the National Marine Fisheries Service confirmed that, on January 29, 2013, a false killer whale (Pseudorca crassidens, a large dolphin species) in Hawaiian waters sustained injuries likely to be fatal when it was hooked by a Hawaiʻi-based longline tuna fishing boat. Under the Fisheries Service’s False Killer Whale Take Reduction Plan, a second such hooking of a false killer whale in Hawaiian waters this calendar year will trigger the closure to tuna longline fishing of a 112,575 square nautical mile area to the south of the main Hawaiian Islands where fishery interactions with false killer whales frequently occur (“the Southern Exclusion Area”). The Fisheries Service issued the plan in November 2012 in response to a series of lawsuits brought by Earthjustice on behalf of the Center for Biological Diversity and Turtle Island Restoration Network to protect Hawaiʻi’s false killer whales from unsustainable levels of death and serious injury in the longline fishery.

A false killer whale, snagged on a longline,
becomes a victim of commercial fishing.  (NMFS)

View more photos of the devastating toll that Hawaiʻi-based longline fishing inflicts on Hawaiʻi’s false killer whales.

View a map of the Southern Exclusion Area.

Main Hawaiian Islands Longline Fishing Prohibited Area and Southern Exclusion Zone.
(77 Fed. Reg. 71,260, 71,265 – Nov. 29, 2012)

“The hooking and likely lethal injury of a false killer whale less than a month into 2013 should be a wake-up call to longline fishers that they need to put the protection plan into effect immediately or risk closure of their fishing grounds,” said Brendan Cummings of the Center for Biological Diversity, who served on the working group the Fisheries Service convened to help develop the plan. “The plan requires weaker hooks and stronger lines precisely to prevent this type of harm.”

In the January 29, 2013 incident, the false killer whale was hooked in the mouth. As the crew reeled it in, the branch line broke, releasing the whale with an estimated 20-30 feet of the branch line, all of the leader (about one foot), and the hook still attached. The Fisheries Service concluded that the incident was a “serious injury”—one likely to lead to death—because hookings in the mouth with substantial amount of gear still attached prevent the animal from eating and/or cause drowning through entanglement.

False killer whale mother and calf.
(Robin Baird / Cascadia Research Collective)

The protection plan requires longline fishers to switch to the use of “weak hooks” that are strong enough to hold an ahi tuna, the fishery’s target species, but weak enough to allow a larger, stronger false killer whale to straighten the hook and pull it out, avoiding serious injury. The plan also requires stronger branch lines that will not break during marine mammal hookings. These gear modification requirements did not take effect until February 27, 2013, a month after the fatal hooking.

“The Fisheries Service dragged its feet for over a decade, requiring three lawsuits before it finally complied with the Marine Mammal Protection Act and issued a plan to address false killer whale deaths in the Hawaiʻi-based longline fishery,” said Earthjustice attorney David Henkin, the lead attorney in the lawsuits. “Had the Fisheries Service acted sooner, as Congress intended, this latest tragedy likely could have been avoided.”

According to the Fisheries Service’s latest analysis, longline fishing is killing false killer whales found within 140 kilometers (87 miles) of the main Hawaiian Islands—the “Hawaiʻi Insular Stock”—at nearly twice the rate this population can sustain, while false killer whales in Hawaiian waters farther from shore—the “Hawaiʻi Pelagic Stock”—are dying at nearly 150 percent of sustainable levels. In November 2012, the Fisheries Service listed the Hawaiʻi Insular Stock, which numbers only about 170 animals and has been declining by 9 percent per year since 1989, as “endangered” under the Endangered Species Act.

“The magnificent false killer whale doesn’t deserve a cruel, painful death at the end of a longline hook, and it is only the latest victim of this indiscriminate fishing method,” said Todd Steiner, biologist and executive director of the Turtle Island Restoration Network. “Critically endangered leatherback sea turtles, sharks and albatross are all caught and killed by industrial longline fishing. The ecological impact of industrial longlining is mounting and threatens the very balance of our imperiled oceans.”

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Watch a KITV interview with Earthjustice attorney David Henkin about this incident.

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