Many fish, marine mammals and seabirds that inhabit the world's oceans are critically endangered, but few are as close to the brink as the North Atlantic right whale ( Eubalaena glacialis). Only about 411 of these whales exist today, and at their current rate of decline, they could become extinct within our lifetimes.
From 1980 through about 2010, conservation efforts focused mainly on protecting whales from being struck by ships. Federal regulations helped reduce vessel collisions and supported a slight rebound in right whale numbers.
Deadly Encounters<p>Whalers pursued right whales for centuries because this species swam relatively slowly and floated when dead, so it was easier to kill and retrieve than other whales. By the mid-20th century, scientists assumed they had been hunted to extinction. But in 1980, researchers from the New England Aquarium who were studying marine mammal distribution in the Bay of Fundy off eastern Canada were stunned when they <a href="https://www.canadianwhaleinstitute.ca/habitats" target="_blank">sighted 26 right whales</a>.</p><p>Conservation efforts led to the enactment of regulations that required commercial ships to <a href="https://www.fisheries.noaa.gov/national/endangered-species-conservation/reducing-ship-strikes-north-atlantic-right-whales" target="_blank">slow down</a> in zones along the U.S. Atlantic coast where they were highly likely to encounter whales, reducing boat strikes. But this victory has been offset by rising numbers of entanglements.</p><p>Adult right whales can produce up to an estimated <a href="https://doi.org/10.1111/mms.12230" target="_blank">8,000 pounds of force</a> with a single stroke of their flukes. When they become tangled in fishing gear, they often break it and swim off trailing ropes and sometimes crab or lobster traps.</p><p>Lines and gear can wrap around a whale's body, flukes, flippers and mouth. They impede swimming and feeding, and cause chronic infection, emaciation and damage to blubber, muscle and bone. Ultimately these injuries weaken the animal until it dies, <a href="https://doi.org/10.1093/icesjms/fsu008" target="_blank">which can take months to years</a>.</p><img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTU1NjEyMi9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYyNDE3OTAyNH0.W5agEwKjibM2AyhELkXhzKSssFMYXh-ubMFKApinqp0/img.png?width=980" id="9ab7d" class="rm-shortcode" data-rm-shortcode-id="1c03b11cfd3e2ef2603f1ea300ec75d4" data-rm-shortcode-name="rebelmouse-image" />
Fishing rope furrowed into the lip of Bayla, right whale #3911.
Michael Moore / NMFS Permit 932-1905-00 / MA-009526 / CC BY-ND
Solutions for Whales and Fishermen<p>The greatest entanglement risk is from ropes that lobster and crab fishermen use to attach buoys to traps they set on the ocean floor. Humpback and minke whales and leatherback sea turtles, all of which are federally protected, also become entangled.</p><p>Conservationists are looking for ways to modify or eliminate these ropes. Rock lobster fishermen in Australia already use <a href="https://www.youtube.com/watch?v=WeeieRr7sTw" target="_blank">pop-up buoys</a> that ascend when they receive sound signals from fishing boats. The buoys trail out ropes as they rise, which fishermen retrieve and use to pull up their traps.</p><p>Other technologies are <a href="https://www.wnpr.org/post/innovations-fishing-gear-could-change-lobster-industry-help-endangered-right-whale" target="_blank">in development</a>, including systems that <a href="https://ropeless.org/november-6th-2018-presentations/" target="_blank">acoustically identify traps on the seafloor</a> and mark them with "virtual buoys" on fishermen's chart plotters, eliminating the need for surface buoys. Fishermen also routinely use a customized hook on the end of a rope to catch the line between traps and haul them to the surface when the buoy line goes missing.</p><span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="0ea6135b2648717554e2de7efd027ca9"><iframe lazy-loadable="true" src="https://www.youtube.com/embed/ylQ5q7Ivs2o?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
A Rebound is Possible<p>The <a href="https://www.fws.gov/endangered/laws-policies/" target="_blank">Endangered Species Act</a> and <a href="https://www.fws.gov/international/laws-treaties-agreements/us-conservation-laws/marine-mammal-protection-act.html" target="_blank">Marine Mammal Protection Act</a> require the U.S. government to conserve endangered species. In Congress, the pending <a href="https://www.congress.gov/bill/116th-congress/house-bill/1568/text?q=%7B%22search%22%3A%5B%22H.R.+3729%22%5D%7D" target="_blank">SAVE Right Whales Act of 2019</a> would provide $5 million annually for collaborative research into preventing mortalities caused by the fishing and shipping industries. And an advisory committee to the U.S. National Oceanic and Atmospheric Administration recently recommended <a href="https://www.fisheries.noaa.gov/feature-story/team-reaches-nearly-unanimous-consensus-right-whale-survival-measures" target="_blank">significant fishing protections</a>, focused primarily on reducing the number of ropes in the water column and the strength of the remaining lines.</p><p>Consumers can also help. Public outcry over dolphin bycatch in tuna fisheries spurred passage of the Marine Mammal Protection Act and led to <a href="https://swfsc.noaa.gov/textblock.aspx?Division=PRD&ParentMenuId=228&id=1408" target="_blank">dolphin-safe tuna labeling</a>, which ultimately reduced dolphin mortalities from half a million to about 1,000 animals annually. Choosing lobster and crab products <a href="https://doi.org/10.1093/icesjms/fsy194" target="_blank">caught without endangering whales</a> could accelerate a similar transition.</p><img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8xOTU1NjEyNS9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY3NzAwMTY5NX0.Cf3LvYL5Kz2vY456wS5iyRK1Qo4LCZmHGRa0LQ3Rnac/img.png?width=980" id="48f9c" class="rm-shortcode" data-rm-shortcode-id="b95b1987283f474ecab6e95fabe1093d" data-rm-shortcode-name="rebelmouse-image" />
Population trends in the North Atlantic and southern right whale species (estimates for North Atlantic species prior to 1990 are unavailable; southern estimates prior to 1990 on decadal scale). Illegal whaling caused a downturn in the southern species in the 1960s.
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