Question

read section 19.2 aquaculture pages 624 - 629

1. describe a basic aquaculture operation.
2. summarize the problems that can occur in mariculture.
3. discuss how pollution and destruction of habitat that result from aquaculture impact marine environments.

read the article \the aquaculture of bluefin tuna\ page 629

1. in 2017, what percentage of tuna stocks were overexploited?
2. what is the iucn status of atlantic bluefin tuna?
3. what is the hormone that triggers spawning?

Explanation:

1. A basic aquaculture operation involves cultivating aquatic organisms (such as fish, shellfish, and plants) in controlled environments like ponds, tanks, or cages, often with feeding, water - quality management, and disease control.
2. Mariculture problems can include disease outbreaks due to high - density farming, escape of non - native species that can disrupt local ecosystems, and environmental degradation from waste and chemical use.
3. Aquaculture - related pollution (e.g., from uneaten feed and fish waste) can cause eutrophication in marine environments, leading to oxygen depletion and algal blooms. Habitat destruction, such as the clearing of mangroves for shrimp farms, can disrupt coastal ecosystems.
4. The percentage of overexploited tuna stocks in 2017 would require data from the article, which may vary by species and region.
5. The IUCN (International Union for Conservation of Nature) status of Atlantic bluefin tuna is critically endangered due to overfishing and habitat loss.
6. Luteinizing hormone - releasing hormone (LHRH) is a hormone that can trigger spawning in fish, although the specific hormone for bluefin tuna in the article may need to be confirmed.

Answer:

1. Information from the article needed for the percentage of overexploited tuna stocks in 2017.
2. Critically endangered.
3. Luteinizing hormone - releasing hormone (LHRH) (subject to confirmation from the article).