Improving fisheries management strategies

Oct 13, 2025 by wbrum.org 57 views

Primary Productivity and Abundance of Krai Tuna (Auxis Thazard) Relationship with the ENSO Phenomenon in the Western Waters of North Sumatra

Introduction

The western waters of North Sumatra, located in the eastern part of the Indian Ocean, are known for their high potential fish catches. This is closely related to the primary productivity of the water, which is influenced by various oceanographic factors, including the El Nino Southern Oscillation (ENSO) phenomenon. ENSO, a change in sea surface temperature in the Pacific Ocean, has a significant impact on the availability of nutrients in the waters, which in turn affects the production of chlorophyll-a, a major indicator of primary productivity. This study aims to examine the effect of ENSO on primary productivity and abundance of krai tuna (Auxis thazard) in the western waters of North Sumatra.

Background

The ENSO phenomenon is a complex and dynamic process that affects the ocean's temperature, atmospheric pressure, and wind patterns. It has a significant impact on the marine ecosystem, including the primary productivity of the water. Primary productivity is the rate at which plants and algae produce organic matter through photosynthesis. It is an essential component of the marine food chain, as it provides the energy and nutrients needed to support the growth and survival of marine organisms. In the western waters of North Sumatra, primary productivity is influenced by various oceanographic factors, including ENSO, sea currents, upwelling, and the availability of nutrients.

Methodology

This study used Aqua Fashionable Level 3 satellite data to analyze the net primary productivity (NPP) of the western waters of North Sumatra. The data was analyzed using the Vertically Generalized Production Model (VGPM) to get a net primary productivity value. The relationship between NPP, abundance of krai tuna, and ENSO was analyzed using Pearson correlation. The data used in this study was collected from 2016 to 2020, and the results were analyzed to examine the effect of ENSO on primary productivity and abundance of krai tuna.

Results

The results of the analysis showed that the value of net primary productivity in the waters of the western waters of North Sumatra in the 2016-2020 period ranged from 275,169 mgc/m2 to 994,898 mgc/m2. The relationship between ENSO and primary productivity is classified as weak, with a correlation value of 0.218. Meanwhile, the relationship between ENSO and the abundance of krai tuna is also classified as weak, with a correlation value of 0.336. These results indicate that although ENSO has an influence on primary productivity and abundance of krai tuna in the western waters of North Sumatra, the influence is classified as weak.

Discussion

The weak influence of ENSO on primary productivity and abundance of krai tuna in the western waters of North Sumatra can be caused by several factors, including:

*** Indirect ENSO Effects: ENSO may not directly affect primary productivity in the western waters of North Sumatra, but through other mechanisms such as changes in sea currents or wind patterns. *** Local factors: Besides ENSO, local factors such as sea currents, upwelling, and the availability of feed also play an important role in determining primary productivity and fish abundance. *** Limited data: This research uses satellite data that has a certain spatial and temporal resolution. More detailed data and a longer period of time may be needed to get a more comprehensive understanding of the relationship between ENSO, primary productivity, and abundance of krai tuna.

Conclusion

Although the influence of ENSO is classified as weak, this study provides important information to understand the dynamics of the West Sumatra Water Ecosystem. This information can be used to improve fisheries management strategies in the region, taking into account the ESO factors and other local factors that affect primary productivity and fish abundance.

Recommendations

Based on the results of this study, the following recommendations are made:

Improving fisheries management strategies: Fisheries management strategies in the region should take into account the ESO factors and other local factors that affect primary productivity and fish abundance.
Collecting more detailed data: More detailed data and a longer period of time may be needed to get a more comprehensive understanding of the relationship between ENSO, primary productivity, and abundance of krai tuna.
Monitoring oceanographic factors: Oceanographic factors such as sea currents, upwelling, and the availability of feed should be monitored to better understand their impact on primary productivity and fish abundance.

Future Research Directions

Future research should focus on:

Examining the impact of ENSO on primary productivity and fish abundance in other regions: The impact of ENSO on primary productivity and fish abundance in other regions should be examined to better understand the dynamics of the marine ecosystem.
Investigating the role of local factors: The role of local factors such as sea currents, upwelling, and the availability of feed in determining primary productivity and fish abundance should be investigated.
Developing more accurate models: More accurate models should be developed to better understand the relationship between ENSO, primary productivity, and abundance of krai tuna.
Q&A: Primary Productivity and Abundance of Krai Tuna (Auxis Thazard) Relationship with the ENSO Phenomenon in the Western Waters of North Sumatra

Frequently Asked Questions

We have received many questions from readers about our recent study on the primary productivity and abundance of krai tuna (Auxis thazard) relationship with the ENSO phenomenon in the western waters of North Sumatra. Below are some of the most frequently asked questions and our answers.

Q: What is the ENSO phenomenon and how does it affect primary productivity and fish abundance?

A: The ENSO phenomenon is a complex and dynamic process that affects the ocean's temperature, atmospheric pressure, and wind patterns. It has a significant impact on the marine ecosystem, including the primary productivity of the water. Primary productivity is the rate at which plants and algae produce organic matter through photosynthesis. It is an essential component of the marine food chain, as it provides the energy and nutrients needed to support the growth and survival of marine organisms.

Q: What is the relationship between ENSO and primary productivity in the western waters of North Sumatra?

A: The relationship between ENSO and primary productivity in the western waters of North Sumatra is classified as weak, with a correlation value of 0.218. This means that while ENSO has an influence on primary productivity, the influence is not strong.

Q: What is the relationship between ENSO and the abundance of krai tuna in the western waters of North Sumatra?

A: The relationship between ENSO and the abundance of krai tuna in the western waters of North Sumatra is also classified as weak, with a correlation value of 0.336. This means that while ENSO has an influence on the abundance of krai tuna, the influence is not strong.

Q: What are the factors that contribute to the weak influence of ENSO on primary productivity and fish abundance in the western waters of North Sumatra?

A: The weak influence of ENSO on primary productivity and fish abundance in the western waters of North Sumatra can be caused by several factors, including:

Indirect ENSO Effects: ENSO may not directly affect primary productivity in the western waters of North Sumatra, but through other mechanisms such as changes in sea currents or wind patterns.
Local factors: Besides ENSO, local factors such as sea currents, upwelling, and the availability of feed also play an important role in determining primary productivity and fish abundance.
Limited data: This research uses satellite data that has a certain spatial and temporal resolution. More detailed data and a longer period of time may be needed to get a more comprehensive understanding of the relationship between ENSO, primary productivity, and abundance of krai tuna.

Q: What are the implications of this study for fisheries management in the western waters of North Sumatra?

A: This study provides important information to understand the dynamics of the West Sumatra Water Ecosystem. This information can be used to improve fisheries management strategies in the region, taking into account the ESO factors and other local factors that affect primary productivity and fish abundance.

Q: What are the future research directions for this study?

A: Future research should focus on:

Examining the impact of ENSO on primary productivity and fish abundance in other regions: The impact of ENSO on primary productivity and fish abundance in other regions should be examined to better understand the dynamics of the marine ecosystem.
Investigating the role of local factors: The role of local factors such as sea currents, upwelling, and the availability of feed in determining primary productivity and fish abundance should be investigated.
Developing more accurate models: More accurate models should be developed to better understand the relationship between ENSO, primary productivity, and abundance of krai tuna.

Q: How can readers get more information about this study?

A: Readers can get more information about this study by contacting us directly or visiting our website. We also encourage readers to share their thoughts and comments about this study on our social media channels.