The various studies also have concluded that the physical presence of the vessels cannot be separated from the sound that they generate, making it difficult to determine whether the vessels themselves or the sound that they emit disturb the whales. Southern Resident Killer Whales are culturally significant to west coast First Nations. Noakes, Donald J, Richard J Beamish, and Michael J Kent. The Commission has consulted with and assessed each of the steps taken by the National Marine Fisheries Service (NMFS) to promote the recovery of the population, and has provided recommendations to NMFS for improvements to their efforts. Learn more about … Resident killer whales associate in stable matriarchal social units called ‘pods’. From 1973 to 2016, the resident killer whale population showed periods of both growth and decline. Simone Cominelli et al. Ruth Joy et al. Since the salmon numbers decrease in the Salish Sea during the winter, resident killer whales disperse and hunt for salmon in the open North Pacific. December 8, 2020.  Emma A. In early fall, J pod regularly includes the waters of Puget Sound within their foraging range. Southern residents appear to be much more vocal but it could be due to their vocal usage during travel and the fact that they seem to travel more than the northern residents.. A recent study found that between 2008 and 2014 over 2/3 of detectable Southern Resident killer whale pregnancies were unsuccessful. It is the only killer whale population listed under the Endangered Species Act by the National Marine Fisheries Service, National Oceanic and Atmospheric Administration. Samuel K. Wasser et al. Vessels both large (such as cargo ships, container ships, and ferries) and small (such as commercial whale-watching boats, recreational fishing vessels, and other recreational/private vessels) can cause disturbance based on their physical presence in proximity to the whales. Size and long-term growth trends of Endangered fish-eating killer whales. The world's oldest known killer whale, Granny or J2, had belonged to and led the J pod of the SRKW population. Northwest killer whales are among the most contaminated marine mammals in the world, due to the high levels of toxic anthropogenic chemicals that accumulate in their tissues. 2017. It is believed that the more similar their dialect is within the pods, the more closely related they are. The southern dialect is very different from that of other communities. Correlative evidence shows orca may be vulnerable to effects of PCBs on many levels. DOI 10.1575/1912/8803. Ross, P.S, G.M Ellis, et al. The Task Force made recommendations designed to increase the availability of Chinook salmon to Southern Resident killer whales, and decrease the risk to the whales from vessels, noise and contaminants. When the first population census was conducted in 1973, 66 whales were sighted.Their population increased by 48% to a high of 98 in 1995, then dropped 16% to 82 individuals between 1995 and 2003, prompting governments to list them as endangered species.As of December 2016, there were 78 Southern Resident Killer Whales in the Salish Sea.Click graphic for a larger image. Although relatively little is known about their distribution during this time, recent evidence suggests that they are spending time near the mouths of major rivers and estuaries, presumably to take advantage of salmon runs during those seasons. Marine Ecology Progress Series 608:291-296, Noise exposure from commercial shipping for the southern resident killer whale population. "ENVIRONMENTAL SCIENCE & TECHNOLOGY. Robert C. Lacy et al. Current Orcasound hydrophone locations. In Canada the SRKW are lis… They are an important indicator of ocean health. "High PCB Concentrations in Free- Ranging Pacific Killer Whales, Orcinus orca: Effects of Age, Sex and Dietary Preference." Ford et al. Simply click a photo below to … Effects of age, sex and reproductive status on persistent organic pollutant concentrations in “Southern Resident” killer whales. The Navy vs. Along with other government agencies and a wide range of public stakeholders, the Commission provided the Task Force with feedback on its draft report and recommendations. The social dynamics of southern resident killer whales and conservation implications for this endangered population. The Orca Network provides a list (last updated September 2017). Michael J. Ford et al. Endangered Species Research 6:211-221, Quantifying the effects of prey abundance on killer whale reproduction. Cullon, D.L., et al. Animal Behaviour 77(4): 963-971, Southern Resident Orca Task Force, Draft Year 2 Report, October 2019. Holly Fearnbach et al. The southern resident killer whales (SRKW) represent the smallest of four resident communities within the Northeastern portion of North America Pacific Ocean. 40.23 (2011): 10194-10202, National Oceanic and Atmospheric Administration, "The Endangered Species Act - Protecting Marine Resources", "Recovery Strategy for the Northern and Southern Resident Killer Whales (Orcinus orca) in Canada", "Recovery Plan for Southern Resident Killer Whales (, "105-year-old orca known as 'Granny' has died, researchers say", "Southern-resident killer whales lose newborn calf, and another youngster is ailing", "How Southern Resident Killer Whales are Identified", "Southern Resident Orca Community Demographics, Composition of Pods, Births and Deaths since 1998", "Endangered species has hope with the birth of a baby killer whale", "J52 "Sonic" died - 3rd of 6 "2015 baby boom" orca to die", "Lummi Nation, biologists prepare to feed starving orca. Environmental Toxicology and Chemistry. Inbreeding in an endangered killer whale population. 2017. Animal Behaviour 83(3): 731-736, Size and long-term growth trends of Endangered fish-eating killer whales. A census of the Southern Resident killer whale population by the Center for Whale Research (CWR) shows the population trends through time (CWR, July 2019). 28:148-161. Southern Residents spend much of their lives in inland waters near numerous sources of pollutants that accumulate in the fish they consume. Ford et al. Southern Residents spend much of their lives in inland waters near numerous sources of pollutants that accumulate in the fish they consume. 2011. 2015. Southern Resident killer whales The federal review panel for the Roberts Bank Terminal 2 project concluded it will have “significant adverse and cumulative effects” on Canada’s endangered Southern Resident killer whales. Somewhat encouragingly, in 2015 seven calves were documented, which was the second largest, single-year number of births on record. https://doi.org/10.1371/journal.pone.0179824, Exposure to a mixture of toxic chemicals: Implications for the health of endangered Southern Resident killer whales. Read More. Learn. The noise can mask echolocation causing difficulty with catching prey. The population increased to its peak of 96-98 whales in the mid-1990’s following the cessation of killings and captures for marine parks, which stopped after the Marine Mammal Protection Act was enacted in 1972. The following is the basic social structure:, In 2014, L120 was born into L pod but didn't survive more than a month.  Pods are groups of matrilines that share a maternal ancestor, in which the southern residents consist of three pods. , There was a Washington state-wide task force created in March 2018 to make recommendations on how to preserve the Southern Residents from extinction. Ward et al. Photo identification over the last 38 years has allowed researchers to track the southern resident population quite accurately, such as the Orca ID site Prey availability, pollution and contaminants, vessels and noise. This is because their main food source is salmon. 2018. Foster et al. 2016. Within each pod, families form into sub-pods centered around older females, usually grandmothers or great-grandmothers. 2019. Priority Actions: 2016-2020, Southern Resident Killer Whale DPS Orcinus orca, 2015 Species in the Spotlight Campaign identifying Southern Resident killer whales among the species at most at risk of extinction, 2015 Ruling to extend Southern Resident killer whale endangered species protections to captive members of the population, and specifically to the captive female known as “Lolita”, 2015 Report on 10 years of Southern Resident Killer Whale Research, 2011 Vessel Regulations in Washington State for Southern Residents, 2008 Recovery Plan for Southern Resident Killer Whales, 2006 Critical Habitat Designation for Southern Residents, Marine Mammal Commission: An Independent Agency of the U.S. Government, Provisions for Managing Fisheries Interactions, Southern Resident Killer Whale Population Details. Governor of Washington’s Orca Recovery page, Potential benefits of vessel slowdowns on endangered Southern Resident killer whales. Linking killer whale survival and prey abundance: food limitation in the oceans’ apex predator? Quantifying the effects of prey abundance on killer whale reproduction. Southern Resident killer whales spend several months of the summer and fall each year in Washington State's Puget Sound. 40.6 (2000): 504–515, Buckman, AH, N Veldhoen, et al. 2018.  From late fall through spring, all three pods apparently spend the bulk of their time on the outer coast, ranging from San Francisco to Southeast Alaska. Noise exposure from commercial shipping for the southern resident killer whale population. The gender of the calf is confirmed to be female. In summer and fall, found primarily in the Salish Sea. During the fall and winter, when Southern Residents disperse widely, they add other salmon species (Coho in fall and chum in winter) and some demersal fishes to their diet (e.g., halibut and lingcod). 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