Fish Kill Phenomenon

What is a direct consequence of rising temperatures on fish: (a) Increase in fish reproduction (b) Warmer water holds less oxygen?

Answer: (b) Warmer water holds less oxygen

Enrich your learning:

What is Fish Kill Phenomenon?

• It refers to the sudden and unexpected death of a large number of fish or other aquatic animals over a short period, primarily within a specific area.

Causes:

• Low Oxygen Levels: One of the primary reasons for fish kills is the low levels of dissolved oxygen in the water, leading to the suffocation of fish.
• Warm Water: As sea surface temperatures rise, oxygen dissolves more easily in colder water than in warmer water. This can lead to oxygen depletion, especially in shallow waters.
• Calm Seas: Calm seas can lead to a reduction in the mixing of oxygen with wind and waves, further depleting oxygen levels.
• Overcast Weather: Cloudy skies can hinder the process of photosynthesis in phytoplankton, reducing oxygen production.