What makes sharks and rays successful predators

There are very few reports of asexual reproduction occurring in females with previous sexual histories, says Dudgeon. Kiowa Bruggestrat Explainer. Is Shark Oviparous or viviparous? The majority of shark species are ovoviviparous. At this point, some sharks either lay their eggs known as oviparity , nourish these young pups off a placenta called viviparity or, as is the case with ovoviviparous species, hatch the eggs within the oviduct before giving birth at a much later stage.

Mose Murgui Explainer. How many offspring do sharks have? Sharks can have from 1 to babies at a time, depending on the type of shark. The ones with pups that grow inside the mother have fewer babies at a time than sharks that lay eggs outside the body. Are Rays Ovoviviparous? All skates and some rays are oviparous egg laying while other rays are ovoviviparous , meaning that they give birth to young which develop in a womb but without involvement of a placenta.

Vidalina Baigorrotegui Pundit. Do rays give live birth? The species does not lay eggs. Stingrays are ovoviviparous: bearing live young in litters of five to The female holds the embryos in the womb without a placenta. Instead, the embryos absorb nutrients from a yolk sac, and after the sac is depleted, the mother provides uterine "milk".

Xuyi Zhitluhin Pundit. What does actinopterygii mean? Definition of Actinopterygii. Jamar Anuprienko Pundit. Do chondrichthyes have bones? Members of the Chondrichthyes all lack true bone and have a skeleton made of cartilage the flexible material you can feel in your nose and ears.

Only their teeth, and sometimes their vertebrae, are calcified; this calcified cartilage has a different structure from that of true bone. Jazmin Reilly Pundit. What are three characteristics of chondrichthyes? Key Features of Chondrichthyes. Resemble bony fish and terrestrial vertebrates in having jaws and paired appendages. An electroreceptive system is well developed. Endoskeleton entirely cartilaginous. No swim bladder or lung. What makes chondrichthyes unique? They help remove the weak and the sick as well as keeping the balance with competitors helping to ensure species diversity.

Through the spatial controls and abundance, sharks indirectly maintain the seagrass and corals reef habitats. The loss of sharks has led to the decline in coral reefs, seagrass beds and the loss of commercial fisheries. By taking sharks out of the coral reef ecosystem, the larger predatory fish, such as groupers, increase in abundance and feed on the herbivores. With less herbivores, macroalgae expands and coral can no longer compete, shifting the ecosystem to one of algae dominance, affecting the survival of the reef system.

Traits that make sharks and rays successful predators include select all that apply. Lateral Lines. Class Chondrichthyes characteristics include select all that apply. Characteristics of ray-finned fish include select all that apply. Report an issue. Cartilaginous and Boney Fish. Find a quiz All quizzes. All quizzes. Create a new quiz.