saimensis) – Around 310 individuals remain, Angelshark (Squatina squatina) – It is believed to be extinct across most of its former range, Beluga Sturgeon (Huso huso) – Population decline of over 90% in the past three generations, Abbott’s booby (Papasula abbotti) – About 6,000 individuals, How South Africa’s mangrove forests store carbon and why it matters, A heat wave in Antarctica melted 20% of an island’s snow in 9 days, One-third of plant and animal species could be gone in 50 years, study says, $1 million worth of shark fins seized at Miami port, We fear sharks, but humans are the real predators, Recreational fishers catching more sharks and rays, New report finds that almost 600,000 metric tonnes of sharks and rays caught annually by top catchers, Climate change is decimating the chinstrap penguins of Antarctica, Revenge of the albatross: seabirds expose illicit fishing, Worst marine heatwave on record killed one million seabirds in North Pacific Ocean, Urgent action required on penguin deaths: Friends of Bicheno Penguins, Dragon, a female North Atlantic right whale, has been discovered entangled off the coast of Nantucket, Taiwan: Hundreds of cetaceans, sea turtles washed up last year, Taiji: Immense cruelty in capturing dolphins, Southeast Asia’s dugongs may disappear soon, Endangered sea turtle found impaled with 3-foot long spear in Florida, Hurricane Dorian could wash sea turtle nests out to sea amid promising nesting season. These sharks are often seen during the night, day, and morning in big schools, sometimes numbering hundreds, most likely because large groups can obtain food easier than singles or small groups, especially larger and trickier prey, as commonly seen. Researchers attribute this growth in demand to the increase in shark fins as an expensive delicacy (such as in shark fin soup) and in 2008 called for a ban on shark finning, a practice in which the shark's fins are cut off and the rest of the animal is thrown back in the water to die. Federal agency concurs with estimate of 83% population decline, triggering new measures Washington, DC. This shark feeds primarily on fish such as sardines, mackerel, and herring, and occasionally they feed on cephalopods such as squid and octopus. Scalloped Hammerheads may be found throughout the seas around northern Australia as far south as Sydney, NSW (34°S) and Geographe Bay WA (33°S). Appendix II lists migratory species that are not endangered, but have an unfavourable conservation status and which would benefit from international cooperation. The wide head and special sensory cells allows the scalloped hammerhead to successfully detect fishes. (2005). This shark’s fins are highly valued and they are being increasingly targeted in some areas in response to increasing demand for shark fins. The scalloped hammerhead was included in the study. [16], They are not considered to be dangerous to humans, and if they do harm a human it is because they live in estuaries and attack out of surprise. I have characterized the population genetic structure, inferred the evolutionary processes shaping it, and estimated effective population size (Ne) using different contemporary and coalescent methods in the endangered scalloped hammerhead shark, Sphyrna lewini, throughout its Eastern Pacific (EP) range. Sexual maturity generally occurs once the scalloped hammerhead attains 240 cm in total or longer. This shark is also known as the bronze, kinky-headed, or southern hammerhead. [20] "This species tendency to aggregate in large groups making capture in large numbers on long lines, bottom nets and trawls even easier. How long can these species survive? This species breeds only in a few spots on the Australian territory of Christmas Island in the …. [15], The gestation period is reported to be around 12 months. Scalloped Hammerhead (Sphyrna lewini ) Fish Description. [4], On average, males measure 1.5 to 1.8 m (4.9 to 5.9 ft) and weigh about 29 kg (64 lb) when they attain sexual maturity, whereas the larger females measure 2.5 m (8.2 ft) and weigh 80 kg (180 lb) on average at sexual maturity.

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