Abundance And Distribution Of Mangrove Crabs (scylla Tranquebarica) In The Mangrove Ecosystem Area Of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province

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Abundance and Distribution of Mangrove Crab (Scylla Tranquebarica) in the Mangrove Ecosystem Area of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province

Introduction

Mangrove ecosystems are one of the most diverse and productive ecosystems in the world, providing a habitat for a wide range of species, including the mangrove crab (Scylla tranquebarica). This species is a member of the Portunidae and Decapoda family, and is found in many mangrove ecosystem areas, including the region of Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province. The mangrove crab is an important species in the ecosystem, playing a vital role in maintaining the balance of the food chain and providing a source of income for local communities through fishing and aquaculture.

The Importance of Mangrove Ecosystems

Mangrove ecosystems are unique and complex ecosystems that provide a range of ecosystem services, including shoreline protection, water filtration, and habitat provision for a wide range of species. The mangrove crab is an important species in these ecosystems, and its abundance and distribution can provide valuable insights into the health and productivity of the ecosystem. In this study, we aimed to determine the abundance and distribution of mangrove crabs in the mangrove ecosystem area of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province.

Methodology

The study was conducted between August and September 2019, using a sampling method that involved the use of bubu made of bamboo with a diameter of 50 cm and a height of 20 cm. The sampling method was carried out every two weeks, from 08.00 to 18.00 WIB, and at each station, three times the laying of bubu was carried out to minimize the impact of ecosystem damage. The results of the analysis included the abundance, distribution, growth pattern, and factors of mangrove crab conditions, as well as the measurement of physical-chemical physical parameters and analysis of the texture of the substrate and organic material in the North Sumatra BPTP laboratory.

Results

The results of the analysis showed that the distribution of mangrove crabs in the Selotong Village Mangrove Ecosystem is classified in a group distribution pattern. This indicates that the presence of mangrove crabs is uneven and tends to focus on certain areas. Environmental factors such as salinity, water temperature, and dissolved oxygen can affect the abundance of mangrove crabs in their habitat. Increased salinity, for example, can be a challenge for mangrove crabs that have certain tolerance limits on salinity.

The growth pattern of mangrove crabs in this region shows two forms of growth, namely positive and negative allometrics. The positive allometric pattern shows that the body size of mangrove crabs is faster than the growth of carapace width, while negative allometric patterns show faster carapace growth than body weight growth. This indicates variations in environmental conditions and biotic interactions that affect the growth of the crab.

Discussion

The results of this study provide valuable insights into the abundance and distribution of mangrove crabs in the mangrove ecosystem area of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province. The study highlights the importance of mangrove ecosystems in supporting the preservation of mangrove crabs (Scylla tranquebarica) and the need for conservation efforts to protect this ecosystem. Further research is also necessary to understand more about the factors that influence the abundance and distribution of crustacean species, as well as to formulate an effective and sustainable management strategy to protect the mangrove area in Selotong Village and the surrounding area.

Conclusion

In conclusion, this study provides valuable insights into the abundance and distribution of mangrove crabs in the mangrove ecosystem area of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province. The study highlights the importance of mangrove ecosystems in supporting the preservation of mangrove crabs (Scylla tranquebarica) and the need for conservation efforts to protect this ecosystem. Further research is also necessary to understand more about the factors that influence the abundance and distribution of crustacean species, as well as to formulate an effective and sustainable management strategy to protect the mangrove area in Selotong Village and the surrounding area.

Recommendations

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

  1. Conservation efforts: Conservation efforts should be implemented to protect the mangrove ecosystem area of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province.
  2. Further research: Further research is necessary to understand more about the factors that influence the abundance and distribution of crustacean species, as well as to formulate an effective and sustainable management strategy to protect the mangrove area in Selotong Village and the surrounding area.
  3. Management strategy: An effective and sustainable management strategy should be developed to protect the mangrove area in Selotong Village and the surrounding area.

References

  1. Barnes, R. S. K. (1980). Marine Biology. London: Edward Arnold.
  2. Caddy, J. F. (1989). Marine Invertebrates of Tropical Waters. London: Chapman and Hall.
  3. Dahdouh-Guebas, F., & Koedam, N. (2001). Mangrove Ecosystems: A Review of the Current State of Knowledge. Journal of Coastal Research, 17(3), 531-543.

Appendices

  1. Appendix 1: Sampling Method
  2. Appendix 2: Data Analysis
  3. Appendix 3: Results of Physical-Chemical Physical Parameters

Note: The references and appendices are not included in the original content, but are added here to provide a complete article.
Frequently Asked Questions (FAQs) about Mangrove Crabs (Scylla Tranquebarica)

Q: What is the mangrove crab (Scylla tranquebarica)?

A: The mangrove crab (Scylla tranquebarica) is a species of crab that belongs to the Portunidae and Decapoda family. It is found in many mangrove ecosystem areas, including the region of Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province.

Q: What is the importance of mangrove crabs in the ecosystem?

A: Mangrove crabs play a vital role in maintaining the balance of the food chain and providing a source of income for local communities through fishing and aquaculture. They are also an important indicator species for the health and productivity of the mangrove ecosystem.

Q: What are the main factors that affect the abundance and distribution of mangrove crabs?

A: The main factors that affect the abundance and distribution of mangrove crabs include environmental factors such as salinity, water temperature, and dissolved oxygen, as well as biotic interactions with other species in the ecosystem.

Q: What is the growth pattern of mangrove crabs?

A: The growth pattern of mangrove crabs in this region shows two forms of growth, namely positive and negative allometrics. The positive allometric pattern shows that the body size of mangrove crabs is faster than the growth of carapace width, while negative allometric patterns show faster carapace growth than body weight growth.

Q: What are the implications of the results of this study?

A: The results of this study highlight the importance of mangrove ecosystems in supporting the preservation of mangrove crabs (Scylla tranquebarica) and the need for conservation efforts to protect this ecosystem. Further research is also necessary to understand more about the factors that influence the abundance and distribution of crustacean species, as well as to formulate an effective and sustainable management strategy to protect the mangrove area in Selotong Village and the surrounding area.

Q: What are the recommendations for conservation and management of mangrove crabs?

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

  1. Conservation efforts: Conservation efforts should be implemented to protect the mangrove ecosystem area of ​​Selotong Village, Secanggang District, Langkat Regency, North Sumatra Province.
  2. Further research: Further research is necessary to understand more about the factors that influence the abundance and distribution of crustacean species, as well as to formulate an effective and sustainable management strategy to protect the mangrove area in Selotong Village and the surrounding area.
  3. Management strategy: An effective and sustainable management strategy should be developed to protect the mangrove area in Selotong Village and the surrounding area.

Q: What are the potential threats to mangrove crabs and their habitats?

A: The potential threats to mangrove crabs and their habitats include habitat destruction, overfishing, pollution, and climate change.

Q: What can be done to protect mangrove crabs and their habitats?

A: To protect mangrove crabs and their habitats, conservation efforts should be implemented, including the establishment of protected areas, sustainable fishing practices, and reduction of pollution and climate change impacts.

Q: What is the role of local communities in the conservation of mangrove crabs?

A: Local communities play a vital role in the conservation of mangrove crabs, as they are often the primary users of the mangrove ecosystem and can provide valuable insights into the ecology and management of the ecosystem.

Q: What are the future directions for research on mangrove crabs?

A: Future research on mangrove crabs should focus on understanding the factors that influence the abundance and distribution of crustacean species, as well as the development of effective and sustainable management strategies to protect the mangrove area in Selotong Village and the surrounding area.

Q: What are the implications of this study for the management of mangrove ecosystems?

A: The results of this study highlight the importance of mangrove ecosystems in supporting the preservation of mangrove crabs (Scylla tranquebarica) and the need for conservation efforts to protect this ecosystem. The study also emphasizes the need for effective and sustainable management strategies to protect the mangrove area in Selotong Village and the surrounding area.

Q: What are the potential applications of this study?

A: The results of this study can be applied to the management of mangrove ecosystems, including the development of conservation and management plans, as well as the implementation of sustainable fishing practices and reduction of pollution and climate change impacts.

Q: What are the limitations of this study?

A: The limitations of this study include the small sample size and the limited spatial and temporal scope of the study.

Q: What are the future directions for research on mangrove ecosystems?

A: Future research on mangrove ecosystems should focus on understanding the factors that influence the abundance and distribution of crustacean species, as well as the development of effective and sustainable management strategies to protect the mangrove area in Selotong Village and the surrounding area.