Joined in 2023 
82 
63 About this deal
In my opinion, this was one of the best, most direct and novel hands-on approaches to shark conservation I had come across. Not only did it result in a positive outcome from the result of direct action but the potential for public engagement for this type of project was huge. Whether you’ve submitted one eggcase or thousands, every eggcase adds to the Great Eggcase Hunt database and helps us to gain a better understanding of egg-laying sharks, skates and chimaera.
Sharks have a range of adaptations that make them perfectly suited to their environment. It's no wonder they've gained a reputation for being some of the most impressive and formidable predators on the planet! Sharks primary sensory structures are the lateral line, pit organs, and ampullae of Lorenzini. Here’s how they work:
Many shark species have brains as complex as mammals, which enables them to process a wide range of senses. Sharks have the same 5 senses as we do plus a couple more...
Koehler, L., Smith, L.E., Nowell, G., 2018. Recovered and Released – A novel approach to oviparous shark conservation. Ocean and Coastal Management. 154. 178-185.
Sharks invest a lot of energy into producing a few, well-developed young. There are 3 main methods of reproduction: oviparity (egg-laying), ovoviviparity and vivparity (live birth). Every year, more people are reading our articles to learn about the challenges facing the natural world. Our future depends on nature, but we are not doing enough to protect our life support system. Pollution has caused toxic air in our cities, and farming and logging have wreaked havoc on our forests. Climate change is creating deserts and dead zones, and hunting is driving many species to the brink of extinction. This is the first time in Earth's history that a single species - humanity - has brought such disaster upon the natural world. But if we don't look after nature, nature can't look after us. We must act on scientific evidence, we must act together, and we must act now. A smalltooth sawfish shark with a satellite tag and yellow spaghetti tag. Fin-Mounted Smart Position and Satellite Tags In the 1950s, "Shark Lady” and ocean science pioneer, Dr. Eugenie Clark, discovered that sharks can recognize colors, shapes, learn to perform behaviors. By teaching lemon sharks that pressing an underwater target would earn food rewards, Clark demonstrated that sharks can be trained. Q: Is it feasible to keep any species of shark in a home marine tank? I’d love to hatch a shark egg out and rear the youngster. I have space for a tank of approximately 3x1.5m in my garage, with room for a sump underneath.
As our paper points out, despite the fact that the number of sharks released has a negligible influence on the stability of the overall wild populations of S. canicula and S. stellaris, it positively impacts shark conservation efforts by attracting public attention and fosters cooperation with relevant stakeholders, including aquariums, dive centres and schools. Some sharks have homocercal tails, where the upper and lower tail lobes are the same size, or symmetrical. A symmetrical tail can propel a shark through the water at high speeds. A great example of this tail is the shortfin mako whose latin name, Isurus oxyrinchus, means “same tail, pointy snout.” The shortfin mako can have swim bursts up to 90 miles per hour! Odds
Friedrich, LA, Jefferson, R, Glegg, G, 2014. Public perceptions of sharks: gathering support for shark conservation. Marine Policy 47, 1–7. Fin-mounted technology, such as accelerometers and cameras, are used to collect data about the movement of a shark’s body. They record video of a shark’s behavior and the ocean environment. Accelerometers use the same technology as cellphones to determine the pitch, roll, yaw, and speed of the animal as it swims. Fin-mounted cameras have helped researchers make discoveries about coral reefs , seagrass beds , and white shark feeding behavior . Spaghetti, Dart, or Roto Tags The protective capsule acts as a life-support machine, containing everything that's needed. The embryo absorbs nutrients from a yolk-sac before hatching. And emerges as a miniature version of the adult. All sharks utilise internal fertilisation, but depending on how long females retain the fertilised eggs, sharks can be divided into two main groups: oviparous (egg-laying) and viviparous (live-bearing). Viviparous species can be further divided into aplacental (yolk-dependent) and placental forms. Some aplacental species such as the sandtiger shark ( Carcharias taurus) also utilise embryophagy, whereby the largest embryo will consume the other developing embryos. It’s also worth noting the other amazing strategies sharks are capable of. Certain species, including the bonnethead shark ( Sphyrna tiburo), can even undergo automictic parthenogenesis, otherwise known as virgin birth, during which an unfertilised egg merges with another cell from the female to form a foetus. GRUESOME FACT – Sandtiger pups not only eat unfertilised eggs but their un-hatched siblings too! This is called intrauterine cannibalism.
Great Deal 
New Comment