Question

Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): Trammel net is used to entangle the fins, scales, teeth etc. of fishes.
Reason (R): It consists of two layers, one with larger meshes outside and another with smaller meshes inside.
In light of the above statements, choose the correct answer from the options given below.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Hint:

A trammel net is essentially a "pocket-maker." Remember the "3-wall" rule: Large mesh - Small mesh - Large mesh. This sandwich construction is what allows the pocket to form.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
A trammel net is a type of entangling net that captures fish in a "pocket" of netting. It is different from a gillnet, which catches fish by the gills. Trammel nets are particularly effective for catching various sizes of fish and species with prominent projections like fins and spines.
Detailed Explanation:
Analysis of Assertion (A): Trammel nets work by "entangling." When a fish hits the net, it pushes the small-meshed netting through one of the large outer meshes, creating a bag or pocket in which the fish is trapped. During this process, the fins, operculum, scales, and teeth of the fish get tangled in the fine mesh. Therefore, Assertion (A) is true.

Analysis of Reason (R): A standard trammel net must consist of three layers of netting—two outer layers with large mesh (the "lint") and one inner layer with small mesh (the "walling"). The inner layer is usually hung loosely so it can form the pocket. While some variations like "semi-trammel" nets exist with two layers, the technical definition of a "trammel net" specifies three walls. Therefore, the statement that it consists of "two layers" makes Reason (R) false.

Evaluating the Relationship: Since the Reason contains a factual error regarding the construction of the gear (two layers vs. three), it cannot be a correct statement or explanation.

Step 2: Final Answer:
Assertion (A) is correct as it describes the capture mechanism, but Reason (R) is incorrect regarding the net's structural layers.