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What is the most appropriate terminology for the gas bladder in fish?
What is the most appropriate terminology for the gas bladder in fish?
Which type of fish has a physoclistous gas bladder?
Which type of fish has a physoclistous gas bladder?
What is the function of the gas gland in fish?
What is the function of the gas gland in fish?
Which structure maximizes oxygen uptake in fish by maintaining a stable oxygen gradient?
Which structure maximizes oxygen uptake in fish by maintaining a stable oxygen gradient?
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In which type of fish does the inflation of the gas bladder occur by gulping air at the water surface?
In which type of fish does the inflation of the gas bladder occur by gulping air at the water surface?
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What is the ancestral condition of the skeleton in sharks?
What is the ancestral condition of the skeleton in sharks?
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Which type of fish is seldom seen retaining low density compounds?
Which type of fish is seldom seen retaining low density compounds?
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What is the primary function of the gas bladder in fish?
What is the primary function of the gas bladder in fish?
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Which type of fish has a smaller gas bladder for streamlining to increase hydrodynamic efficiency?
Which type of fish has a smaller gas bladder for streamlining to increase hydrodynamic efficiency?
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What is the composition of the gas bladder in fish?
What is the composition of the gas bladder in fish?
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Which type of fish has a reduced skeletal-muscular system and no gas bladders in deep waters?
Which type of fish has a reduced skeletal-muscular system and no gas bladders in deep waters?
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What is the ancestral condition of the gas bladder in fish?
What is the ancestral condition of the gas bladder in fish?
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What is the principle that states an object completely or partly immersed in a fluid is 'buoyed up' by a force equal to the weight of the fluid displaced?
What is the principle that states an object completely or partly immersed in a fluid is 'buoyed up' by a force equal to the weight of the fluid displaced?
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What is the condition for neutral buoyancy (weightlessness) of an object in water?
What is the condition for neutral buoyancy (weightlessness) of an object in water?
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Which strategy for achieving buoyancy in fishes involves the use of gas bladders (swim bladders)?
Which strategy for achieving buoyancy in fishes involves the use of gas bladders (swim bladders)?
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What is the specific gravity condition for positive buoyancy in comparison to the density of water?
What is the specific gravity condition for positive buoyancy in comparison to the density of water?
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Which fish species achieves buoyancy through the retention of low-density compounds such as large fatty livers and lipids with a specific gravity of 0.9-0.92?
Which fish species achieves buoyancy through the retention of low-density compounds such as large fatty livers and lipids with a specific gravity of 0.9-0.92?
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What is the specific gravity of the body of Carcharinus plumbeus, a shark species, due to the retention of low-density compounds in its large livers and lipids?
What is the specific gravity of the body of Carcharinus plumbeus, a shark species, due to the retention of low-density compounds in its large livers and lipids?
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Which type of skeleton lacks a gas bladder for achieving buoyancy?
Which type of skeleton lacks a gas bladder for achieving buoyancy?
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What is the specific gravity of squalene, a low-density compound found in the large livers of sharks?
What is the specific gravity of squalene, a low-density compound found in the large livers of sharks?
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In which strategy for achieving buoyancy do fishes reduce the density of heavy (dense) tissues such as bone and muscle?
In which strategy for achieving buoyancy do fishes reduce the density of heavy (dense) tissues such as bone and muscle?
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What is the specific gravity of water?
What is the specific gravity of water?
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What is the term for the condition where the specific gravity of an object equals the density of water, resulting in it being suspended in water without sinking or floating?
What is the term for the condition where the specific gravity of an object equals the density of water, resulting in it being suspended in water without sinking or floating?
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Study Notes
Gas Bladder Terminology
- Swim bladder is the most appropriate terminology for the gas bladder in fish.
Physoclistous Gas Bladder
- Physoclistous fish possess a gas bladder connected to the blood supply by a gas gland and ovale.
Gas Gland Function
- The gas gland secretes lactic acid, increasing the acidity of the blood and reducing the solubility of gases. This allows oxygen to diffuse from the blood into the gas bladder, inflating it.
Oxygen Gradient in Fish
- Gill lamellae, the highly vascularized thin plates maximizes oxygen uptake in fish by maintaining a stable oxygen gradient between the water and the blood.
Air-Gulping Fish
- Physostomatous fish inflate their gas bladder by gulping air at the water surface.
Ancestral Shark Skeleton
- The ancestral condition of the skeleton in sharks is cartilaginous.
Low Density Compounds
- Deep-sea fishes are seldom seen retaining low density compounds for buoyancy control, as pressure makes such strategies ineffective.
Gas Bladder Function
- The primary function of the swim bladder is to regulate buoyancy, allowing fish to conserve energy by minimizing effort in maintaining position in the water column.
Streamlined Gas Bladder
- Fast-swimming fish often have a smaller gas bladder for streamlining, increasing hydrodynamic efficiency.
Gas Bladder Composition
- The swim bladder in fish is filled with nitrogen gas primarily, with minor amounts of oxygen and carbon dioxide.
Deep-Sea Fish Adaptation
- Deep-sea fish have a reduced skeletal-muscular system and no gas bladders, relying on other buoyancy mechanisms due to the extreme pressures at those depths.
Ancestral Gas Bladder
- The ancestral condition of the gas bladder in fish is physostomus, meaning a connection to the esophagus.
Archimedes' Principle
- Archimedes' Principle states that an object completely or partly immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced.
Neutral Buoyancy Condition
- The condition for neutral buoyancy (weightlessness) of an object in water is when the object's density equals the density of water.
Gas Bladder Buoyancy Strategy
- Using gas bladders (swim bladders) is a strategy for achieving buoyancy in fishes.
Positive Buoyancy Condition
- The specific gravity condition for positive buoyancy is greater than 1, meaning the object is less dense than water.
Low Density Compound Buoyancy
- Some fish species, like sharks, achieve buoyancy through the retention of low-density compounds such as large fatty livers and lipids with a specific gravity of 0.9-0.92.
Shark Buoyancy
- Carcharinus plumbeus (a shark species) has a body specific gravity of around 1.035 due to the retention of low-density compounds in its liver and lipids.
Skeleton Without Gas Bladder
- Chondrichthyes (cartilaginous fishes), like sharks and rays, lack a gas bladder for achieving buoyancy.
Squalene Specific Gravity
- Squalene, a low-density compound found in the large livers of sharks, has a specific gravity of approximately 0.86.
Tissue Density Reduction Strategy
- Some fish reduce the density of heavy (dense) tissues like bone and muscle to achieve buoyancy.
Water Specific Gravity
- The specific gravity of water is 1.0.
Specific Gravity and Buoyancy
- Neutral buoyancy occurs when the specific gravity of an object equals the density of water, meaning it is suspended in water without sinking or floating.
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Description
Test your knowledge of buoyancy in fishes with this quiz on Archimedes' principle, neutral buoyancy, positive buoyancy, and specific gravity. See how well you understand the concepts related to how fishes maintain their buoyancy in water.
