Question

Почему в морях добывают во много раз больше рыбы,чем в реках?ПОМОГИТЕ НА ЗАВТРА !!!!!!!!!!!!!

Answer 1

моря больше чем реки, а значит и численность выше, и видов больше

Answer 2

Why is there more fish harvested in the seas than in rivers?

The reason why more fish are harvested in the seas compared to rivers can be attributed to several factors:

1. Larger Habitat: The seas provide a much larger habitat for fish compared to rivers. Oceans cover about 71% of the Earth's surface, while rivers make up a much smaller portion. This larger habitat in the seas allows for a greater diversity and abundance of fish species.

2. Nutrient Availability: The seas are generally richer in nutrients compared to rivers. Oceans receive nutrients from various sources, including rivers, upwelling currents, and marine organisms. These nutrients support the growth of phytoplankton, which forms the base of the marine food chain. The abundance of phytoplankton attracts larger fish, leading to a higher concentration of fish in the seas.

3. Migration Patterns: Many fish species undertake long-distance migrations between the seas and rivers. They spawn in rivers and then migrate to the seas for feeding and growth. This migration pattern contributes to the higher fish population in the seas, as fish spend a significant portion of their life cycle in the marine environment.

4. Commercial Fishing: Commercial fishing activities are more commonly conducted in the seas due to the larger fish populations and the presence of valuable commercial species. The seas offer more opportunities for commercial fishing vessels to operate on a larger scale, leading to higher fish harvests.

It is important to note that these factors are generalizations and may vary depending on specific regions and ecosystems. Additionally, the impact of human activities, such as overfishing and pollution, can also affect fish populations in both seas and rivers.

I hope this information helps! Let me know if you have any more questions.