Question

Salvenia is a

• A. Emergent weed
• B. Submerged weed
• C. Floating weed
• D. Marginal weed

Hint:

Aquatic Weed Categories:
Floating Weeds = Salvinia, Eichhornia (Water hyacinth), Pistia, Lemna.
Submerged Weeds = Hydrilla, Vallisneria.
Emergent = Lotus (Nelumbo), Water Lily.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Aquatic weed classification: Salvinia molesta (water fern African payal) is a highly invasive free-floating aquatic pteridophyte.

Step 2: Detailed Explanation:
Classification of aquatic macrophytic weeds in fisheries ponds:
1. Floating Weeds (Free-Floating) (C): Plants that float freely on the water surface with roots suspended in the water column (not anchored to bottom sediment). Prime examples include {Salvinia molesta (Water Fern African Payal), Eichhornia crassipes (Water Hyacinth), Pistia stratiotes (Water Lettuce), and Lemna (Duckweed).
2. Submerged Weeds: Hydrilla, Vallisneria, Ceratophyllum, Najas.
3. Emergent Weeds: Nymphaea, Nelumbo, Typha.
4. Marginal Weeds: Ipomea, Cyperus.

Step 3: Final Answer:
Therefore, Salvenia is a Floating weed, matching option (C).