Causes
How does consumer demand influence the decrease in fishing stocks?
If demand is always higher than supply, eventually the supply will run out.
Define hatchery.
A place for artificial breeding, hatching, and rearing through the early life stages of shellfish in particular.
A narrow body of water separating Africa and Europe. This is where Bluefin are commonly found.
The straight of Gibraltar
What is the beluga sturgeons natural habitat and why are they over fished?
The caspian, black, azov, and Adriatic seas. They are over fished for their eggs (caviar)
What effect does over fishing have on marine ecosystems?
Disrupts food webs and fish behavior.
A term for using large ships to essentially encase mass amounts of fish and bycatch.
Trawling
The cultivation of freshwater and saltwater populations of marine animals under controlled conditions.
Aqua Culture.
Which unrestricted method of fishing poses the most harm to bluefin tuna?
Trawling
Which method of fish stocking supports the survival of the beluga sturgeon?
Hatcheries
How are coral reefs threatened by overfishing?
Overfishing gets rid of key species, disrupts balance and coral food sources.
The process of collecting large amounts of bait and attaching them to miles worth of fishing wire?
Long lining
Another term for hypoxia in which a reduced level of oxygen in water creates a rapidly decreasing population of marine life in that area.
Dead Zone.
What is the scientific name of the Bluefin Tuna?
Thunnus thynnus
What species is the only freshwater fish species that is both bigger and older that the beluga sturgeon?
There isn’t one.
How would the extinction of edible fish impact other worldwide food sources?
Other foods (dairy, poultry) will need to be produced in larger quantities
A controversial aquacultural practice that largely contributes to over fishing in the sense that large populations of fish are held in enclosures and grown to achieve higher numbers.
Fish farming
Define “the collapse” and explain why there could or could not be another one.
The collapse was the point at which the fish population had dropped to no more than 10% remaining. The second collapse is thought to come in 2050, when inevitably there are no fish left.
What months are most successful for bluefin fishing in the straight of Gibraltar and why are the tuna so populated this time of year?
Early June- Late October.
The longest days of the year occur in this time frame and the increase of sunlight and nutrients cause the bluefin to migrate in order to follow their prey to the straight.
How old are sturgeons said to be as a species?
Almost 200 million years old.
Without fishing as a source of income, what will happen to coastal populations? Specifically third world territories.
How could capitalism contribute to over fishing?
Sectors, the most manageable concept to avoid over fishing, is a relatively socialist idea and not well received by many.
A word that could be used to identify over 1,400 species of fish today but also is never a permanent adjective and is always changing.
Endangered
What evolutionary adaptations have the bluefin undergone in order to rise to the top of the food chain?
- retractable dorsal and pectoral fins
- “finlets” on their tails reduce water turbulence
- A streamlined teardrop shaped body, ideal for hydrodynamics.
-A rapidly beating tail to minimize energy used while swimming.
- “shape shifting” fins for increased agility.
What is “Almas” and how Why does the production of it cause such an immense threat to the life of sturgeons and other animals around them?
Almas is the caviar of specifically albino sturgeons. It sells for almost 35000 dollars for 2 lbs. Divers go to great lengths to acquire it regardless of any threats to other animals.
Economically speaking how can depleted fish stocks lead to a depression in many if not all coastal areas of the work? How much money would be lost?
Once stocks run out, an estimated 362 billion dollars of global revenue would be lost.