{"id":4839,"date":"2015-06-24T00:00:00","date_gmt":"2015-06-24T00:00:00","guid":{"rendered":"http:\/\/www-prod.greenpeace.org\/usa\/hawaiian-monk-seal\/"},"modified":"2024-11-20T10:49:06","modified_gmt":"2024-11-20T10:49:06","slug":"hawaiian-monk-seal","status":"publish","type":"page","link":"https:\/\/www.greenpeace.org\/usa\/oceans\/wildlife-facts\/hawaiian-monk-seal\/","title":{"rendered":"Hawaiian Monk Seal"},"content":{"rendered":"

Neomonachus schauinslandi<\/span>
Adult monk seals are generally light gray while pups are often black or dark gray. At maturity, this species reaches from 6 feet 11 inches to 7 feet 10 inches and weighs from 510 to 600 pounds.<\/span><\/p>\n

Monk seal with virus at the Pieterburen Seal Sanctuary
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Estimated Population<\/h2>\n
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1,300 – 1,400 seals occurring only in the Hawaiian Archipelago, listed as endangered under The Endangered Species Act.<\/p>\n

Biology<\/h2>\n

Monk seals mainly occupy the uninhabited atolls of the Northwestern Hawaiian Islands; however, some have also been spotted around the Main Hawaiian Islands.<\/p>\n

The monk seal depends largely on the coral reefs for feeding. Their diet consists of fish, eels, octopuses, and crustaceans.<\/p>\n

Monk seals are very fast and efficient swimmers; they can travel long distances and dive over 800 feet.<\/p>\n

After four years, females reach sexual maturity but do not bear young until age 6 or 7. Similar to other species of seal, monk seals only bear 1 young per year. Although 90 percent of pups survive to weaning, in recent years, survival of pups post-weaning has been as low as 30 percent in some areas. There were 8 pup deaths this year at the French Frigate Shoals.<\/p>\n

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Threats<\/h2>\n

Skewed male to female ratios due to low pup survival rates have led to groups of aggressive males attempting to mate with a single female and with pups resulting in mortal wounds.<\/p>\n

Fishery-related deaths play a major role in low populations. Each year, around 10 monk seals wash ashore entangled in fishing nets, while others become entangled in marine debris, are disturbed at haul-out sites or become poisoned by contamination.<\/p>\n

Natural threats such as shark predation, a decline in atoll productivity, intra-species aggression by large males, and a loss of pupping habitat likely due to sea-level rise also threaten monk seal populations. A natural catastrophe such as a disease outbreak could lead this species to extinction.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/form>\n","protected":false},"excerpt":{"rendered":"

Neomonachus schauinslandiAdult monk seals are generally light gray while pups are often black or dark gray. At maturity, this species reaches from 6 feet 11 inches to 7 feet 10 inches and weighs from 510 to 600 pounds. 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