[11] Adult female bull sharks average 2.4 m (7.9 ft) long and typically weigh 130 kg (290 lb), whereas the slightly smaller adult male averages 2.25 m (7.4 ft) and 95 kg (209 lb). The most distinguishing characteristic of this shark is its large robust body. In 1961, following specimen comparisons, taxonomists synonymized them. [36] The kidneys produce large amounts of dilute urine, but also play an important role in the active reabsorption of solutes into the blood. This is a distraction tactic; if the predator moves to eat the regurgitated food the bull shark can use the opportunity to escape. Populations of bull sharks are also found in several major rivers, with more than 500 bull sharks thought to be living in the Brisbane River. While a maximum size of 3.5 m (11 ft) is commonly reported, a single record exists of a female specimen of exactly 4.0 m (13.1 ft). Seeing scratches and other marks on a mature female which may be from the mating ritual is not uncommon. “The shape is not consistent with the fin shape of a bull shark,” he told KCRG, explaining that bull sharks have a straighter fin and this one is curved. We've also seen something from Lake Pontchartrain. Bull sharks have been recorded in the Tigris River since at least 1924 as far upriver as Baghdad. “We thought it was a sheep skull or cow jaw until we saw the teeth.”. Bull sharks have traveled up the Mississippi River as far north as Illinois and are regularly spotted in India's Ganges. The bull shark is one of the few cartilaginous fishes that have been reported in freshwater systems. "We got a pretty good shot of finding a shark out here. The bull shark can be up to 81 cm (2.66 ft) in length at birth. After the first initial contact, they continue to bite and tackle prey until they are unable to flee. The scientists will track the sharks to find out where they're going and how far their moving. A bull shark would indeed be more likely spotted in the Sirena River (which is located in Corcovado National Park in Costa Rica) than a great white shark would be in the Mississippi River … The most distinguishing characteristic of this shark is its large robust body. October 14, 2005 at 9:10 PM CDT - Updated July 2 at 9:30 PM, Barnett, Rockco head to run off for Harrison Co. Tax Collector, Louisiana approves Amendment 1 stating abortion not a right, INTERACTIVE MAP: See Mississippi’s presidential vote county-by-county, 'We’re disrupting the gang’s retail networks’: Contraband raid at Parchman nets drugs, phones, liquor, Police investigating after Bay St. Louis woman found dead, Beaches in Harrison County remain closed due to Zeta cleanup efforts. (2005). The Missouri and Mississippi rivers regularly dip below 35 degrees for months at a time, but a bull shark prefers tropical waters that … A bull shark is the only shark capable of surviving in freshwater, but would a bull shark have made a 1,000-mile-plus swim up the Mississippi River from the Gulf Coast? Bull sharks have traveled 1,750 miles up the Mississippi River and as far north as Illinois. Sand tiger sharks are known to roam the Atlantic, Pacific and Indian oceans, and in the Mediterranean and Adriatic seas, but the Mississippi River? Still greater numbers are in the canals of the Gold Coast, Queensland. [41], The bull shark's diet consists mainly of bony fish and small sharks, including other bull sharks,[4] and stingrays. So if it’s not a shark, what could it be? Bull sharks in freshwater environments decrease the salt-excretory activity of the rectal gland, thereby conserving sodium and chloride. You may remember, Bull sharks were blamed for those violent attacks in Florida last summer. It is a medium-size shark, but can reach lengths of 9 feet.
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