Cartilaginous Fishes - Q&A Flashcards
Give one example of a cartilaginous fish that lives in the freshwater habitat from the report.
bull shark or freshwater stingray
A gathering spot where solitary animals go to eat or to mate.
cafe
Philippines located within the _____, known for its high marine biodiversity.
coral triangle
Shark species that has antifreeze protein that enables them to survive in cold waters
sleeper sharks
What countries are in the top five shark catchers?
- USA
- Mexico
The special receptor organs that can be found in the lateral line system of cartilaginous fishes.
neuromasts
Sharks and batoids have placoid scales that are also called ________.
dermal denticles
Without hard bones, red blood cells are produced in the kidneys and a special organ called an _______.
epigonal
How many waves of contractions are produced every minute during steady swimming?
54
How does tapetum lucidum help in the cartilaginous fishes’ eyes?
helps vision in low light situations
- shiny, reflective structure that reflects light
- helps vision in low light situations
tapetum lucidum
What respiratory structure do bottom-dwelling chondrichthyes use to breathe?
spiracle
It is a twisted or coiled organ designed to maximize the GI’s nutrient absorptive capabilities.
spiral valve
The outflow chamber of the heart that releases blood to the shark’s gills to be oxygenated
Bulbus arteriosus
What is the specialized immune structure along the esophagus that is found in chondrichthyes?
Leydig’s Organ
The intromittent organ found in male sharks?
claspers
Name the type of tail found in sharks where the upper lobe is longer than the lower lobe.
heterocercal tail
cartilaginous fishes has a flattened body shape?
manta ray
Sharks, skates, and rays regulate buoyancy using a swim bladder with a pneumatic duct connected to the esophagus.
T or F
False
What type of skeleton do Chondrichthyes possess?
Cartilaginous skeleton
Chondrichthyes are divided into two subclasses. Which group includes sharks, rays, skates, and sawfish?
Elasmobranchii
Egg cases are commonly known as “____________”?
mermaid purse
Sand Tiger Shark rather have an unusual mode of reproduction, What Mode of Reproduction do they exhibit specifically?
Intrauterine Cannibalism/Ovophagy
How long is the gestation period of Basking Sharks?
3 1/2 years
Just give its common name. What species of Shark bears its young mostly during winter, far out in the continental shelf of northeastern america?
Atlantic Spiny Dogfish (Squalus acanthias)
What sampling method helps determine species diversity, population structure, and evolutionary relationship?
genetic sampling
