In which aquatic habitat are cichlids and poecilids commonly found?

• A) Deep-sea trenches
• B) Polar ice caps
• C) Secondary freshwater
• D) Primary fresh water

The authors examinates for global fisheries employment are _________ times higher than the Foods and Agriculture Organization estimates.

• A) 1.15
• B) 2.55
• C) 1.75
• D) 1.25

The ____________ecosystem is an aquatic ecosystem that includes lakes, ponds, rivers, streams and wetlands.

• A) saltywater
• B) marinewater
• C) freshwater
• D) tresstrial

The number of individuals and total biomass_________at successive trophic levels as organisms _________in size.

• A) increase, decrease
• B) none of these
• C) decrease, increase
• D) remains same, increase

During summers, the temperature of the freshwater ecosystem generally ranges from _________ Fahrenheit.

• A) 38-61 degrees
• B) 10-71 degrees
• C) 20-91 degrees
• D) 30-71 degrees

The gill rot (branchyomyces) of carps involves the attack of __________on the gills of carps.

• A) Agaricus
• B) Saprolegnia
• C) Auricularia cornea
• D) Boletus

What does it mean for a shark species to be described as "pelagic"?

• A) They are bottom-dwelling species.
• B) They live exclusively in freshwater environments.
• C) They spend much of their lives swimming in the open ocean.
• D) They primarily inhabit deep-sea trenches.

The fish flesh is an excellent source of protein, has very little fat, carries a good amount of minerals and vitamins ____________ and rich in iodine.

• A) A and B
• B) B and D
• C) A and D
• D) C and D

The freshwater ecosystem is mainly divided into ___________types based on its region.

• A) three
• B) four
• C) five
• D) two

____________have a more substantial salt content and greater biodiversity in comparison to the_____________.

• A) Marinewater ecosystem, freshwater ecosystem
• B) Marinewater ecosystem, saltwater ecosystem
• C) freshwater ecosystem, Marinewater ecosystem
• D) freshwater ecosystem, tresstrial ecosystem

What does the term "Methaline aquaculture" refer to?

• A) Rearing of aquatic organisms in water containing high salt concentration
• B) Aquaculture practices using methanol as a primary nutrient
• C) Farming of freshwater fish species
• D) Production of methane gas in aquaculture ponds

In which division of aquaculture are culture practices such as floating cage and longline commonly carried out?

• A) Freshwater aquaculture
• B) Recirculating aquaculture
• C) Marine aquaculture
• D) Brackishwater aquaculture

What is fish ranching?

• A) Fish ranching has no differences from traditional aquaculture.
• B) Fish ranching utilizes recirculating systems.
• C) Fish ranching involves only wild-caught fish.
• D) Fish ranching involves restocking of the wild stock for harvest­ing.