Question:
An ideal spindle shaped sinkers commonly used in purse-seine operation is made up of which of the following
An ideal spindle shaped sinkers commonly used in purse-seine operation is made up of which of the following
Show Hint
Spindle-shaped lead sinkers are designed with a smooth, tapered profile to prevent the purse-seine netting and purse-lines from getting snagged or tangled during casting and hauling.
Updated On: Aug 20, 2026
- Wood
- Lead
- Iron
- Aluminum
Show Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
The sinker line (or footrope) of a net requires weights to sink rapidly in the water column and prevent fish from escaping underneath.
Step 2: Detailed Explanation:
Purse seines are large pelagic wall-nets used to surround schools of fish.
To prevent active swimming fish (like mackerels or sardines) from escaping beneath the net, the bottom footrope must sink very rapidly.
This is achieved by attaching heavy, streamlined, spindle-shaped sinkers made of Lead.
Lead is the ideal material because of its extremely high density, soft nature (easy to cast/shape around ropes), and excellent resistance to saltwater corrosion.
Step 3: Final Answer:
The sinkers are made of Lead, which corresponds to option (B).
The sinker line (or footrope) of a net requires weights to sink rapidly in the water column and prevent fish from escaping underneath.
Step 2: Detailed Explanation:
Purse seines are large pelagic wall-nets used to surround schools of fish.
To prevent active swimming fish (like mackerels or sardines) from escaping beneath the net, the bottom footrope must sink very rapidly.
This is achieved by attaching heavy, streamlined, spindle-shaped sinkers made of Lead.
Lead is the ideal material because of its extremely high density, soft nature (easy to cast/shape around ropes), and excellent resistance to saltwater corrosion.
Step 3: Final Answer:
The sinkers are made of Lead, which corresponds to option (B).
Was this answer helpful?
0
0
Top ICAR AIEEA Fisheries Science Questions
- How does climate variability influence biological productivity and fisheries sustainability?
- The density of seawater at $4^{\circ}\text{C}$ is}
- How does phytoplankton biomass impact fisheries productivity?
- What role do bio-indicators play in assessing aquatic pollution levels?
- How does water pH influence fish physiology and ecology?
View More Questions
Top ICAR AIEEA Fish Processing Questions
- Which among the following is the major cause for belly bursting of fish
- The lysosomal protease in muscle belonging to family of Aspartic proteases
- When pre-rigor fish are frozen, the following ions are released into sarcoplasmic reticulum at high concentration causing thaw rigor
- The Nutrients that are least affected during irradiation of fishery products is/are
- Formation of aflatoxins in smoked fish is due to the action of ___________
View More Questions
Top ICAR AIEEA Questions
- Which of the following statements is false?
- Which of the following is an example of an inventory?
- According to Adam Smith, productivity gains could be brought about through .
- The supply curve for an artificially scarce good is .
- Which of the following would not be considered an opportunity cost of paid employment?
View More Questions