Like all other shark species, they have a special sense of feeling with and organ called the ampullae of Lorenzini.
They have a slender body, making them easily mistaken for the pups of other shark species. On average, Blue sharks grow to about 12 to 13 feet in length, and aren’t heavy sharks at all, with the maximum weight being about 450 pounds. They range anywhere from dark to light blue in coloration, and even sometimes have several shades of blue on their bodies to make a gradient, with the darkest colors on top. Their tail fin moves from side to side making them extremely fast, powerful swimmers and easily able to pursue their prey for extended distances. The Blue shark has a sleek, tapered body specifically made for agile, graceful movements through the water. Machovsky-Capuska, 7 June 2020, Frontiers in Marine Science.One of my favorite Blue shark facts is the reason behind its specially designed body. Peddemors, David Raubenheimer and Gabriel E. Reference: “Diet Composition and Nutritional Niche Breadth Variability in Juvenile White Sharks ( Carcharodon carcharias)” by Richard Grainger, Victor M.
“This study will give us a lot of information to assist in this management process,” Dr. Protecting this species and safely managing its interactions with humans is a priority for scientists and the NSW Department of Primary Industries. Tracking of white sharks shows that they migrate seasonally along Australia’s east coast from southern Queensland to northern Tasmania, and the range of movement increases with age. “This fits with a lot of other research we’ve done showing that wild animals, including predators, select diets precisely balanced to meet their nutrient needs,” said co-author Professor David Raubenheimer, Chair of Nutritional Ecology in the School of Life and Environmental Sciences. The scientists also found that larger sharks tended to have a diet that was higher in fat, likely due to their high energy needs for migration. Credit: Ryan Montgomery/Aerologistics Helicopters Great white shark swimming of east Australian coast taken from a helicopter. “The hunting of bigger prey, including other sharks and marine mammals such as dolphin, is not likely to happen until the sharks reach about 2.2 meters in length,” Mr. Grainger said that marine mammals, other sharks, and cephalopods (squid and cuttlefish) were eaten less frequently. The remainder was unidentified fish or less abundant prey. Reef fish, such as eastern blue gropers: 5.0%.Bottom-dwelling fish, such as stargazers, sole or flathead: 17.4%.Pelagic, or mid-water ocean swimming fish, such as Australian salmon: 32.2%.The study found that based on abundance, the sharks’ diet relied mostly on: “Eagle rays are also hunted, although this can be difficult for the sharks given how fast the rays can swim.” We found that rays were also an important dietary component, including small bottom-dwelling stingrays and electric rays.
As well as east Australian salmon, we found evidence of other bony fish including eels, whiting, mullet, and wrasses. Grainger said: “White sharks have a varied diet. “Understanding the nutritional goals of these cryptic predators and how these relate to migration patterns will give insights into what drives human-shark conflict and how we can best protect this species,” said Dr Gabriel Machovsky-Capuska, an adjunct Senior Research Fellow at the Charles Perkins Centre and a co-author of the study. The scientists compared this with published data elsewhere in the world, mainly South Africa, to establish a nutritional framework for the species. The study examined the stomach contents of 40 juvenile white sharks (Carcharodon carcharias) caught in the NSW Shark Meshing Program. Credit: Richard Grainger/University of Sydney GoPro image of a great white shark off east Australian coast at Evans Head, New South Wales.
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