Statement: A mass mortality of shrimps has been reported across ponds on the Andhra coast due to the presence of a virus. Courses of Action: I. Immediately test and characterize pond water to identify the virus and contamination pathways. II. Temporarily halt shrimp catching/harvesting from affected ponds. III. Alert and train fishers/farmers to monitor early signs and report outbreaks promptly. Which course(s) of action logically follow(s)?

Introduction / Context:
Epizootics in aquaculture demand containment, diagnosis, and stakeholder awareness. The goal is to curb spread, protect food safety, and restore livelihoods through informed biosecurity measures.

Given Data / Assumptions:

• Cause: Viral presence indicated by mass mortality.
• Risk: Spread across contiguous ponds and supply chains.
• Need: Diagnostic clarity, movement control, farmer vigilance.

Concept / Approach:
A three-pronged response is warranted: confirm the pathogen (I), limit spread via temporary harvest/catch halt (II), and empower frontline detection and reporting (III). These steps are complementary and time-sensitive.

Step-by-Step Solution:

Verification / Alternative check:
Aquaculture disease protocols emphasize rapid diagnostics, quarantine, and farmer advisories.

Why Other Options Are Wrong:

Common Pitfalls:
Continuing harvesting during outbreaks; acting without pathogen confirmation.

Final Answer:
All follow.