Biology Of Male Fishing Reproduction (Rastrelliger Kanagurta) Which Is Landed At The Tanjung Tiram Coal Auction Place (TPI)
Biology of Male Mackerel Reproduction (Rastrelliger Kanagurta) at the Tanjung Tiram Coal Auction Place
Introduction
Tanjung Tiram Fisheries Port is a significant hub for fishery activities in North Sumatra, Indonesia. The port's pier facility serves as a docking point for fishing boats and a location for fish auctions (TPI), where fishermen sell their catches. One of the primary species caught in this area is the male mackerel, also known as Rastrelliger kanagurta. This fish is highly valued by fishermen due to its affordable price and high omega-3 content, which is even higher than that of salmon.
The Importance of Studying Male Mackerel Reproduction
In November and December 2022, a study was conducted to investigate the reproductive biology of male mackerel landed at the Tanjung Tiram Coal Auction Place. The primary objective of this study was to identify the growth patterns and aspects of the reproductive biology of bloated male mackerel. The research method employed was purposive sampling, where sampling was conducted twice a month. A total of 199 fish were studied, with a total weight (TW) ranging from 46.2-113.8 grams and a total length (TL) ranging from 160-208 mm.
Growth Pattern and Condition Factor
The results of the study revealed that the relationship between the length and weight of male mackerel exhibited a negative allometric growth pattern, with a value of B less than 3. This indicates that the growth of fish weight is not comparable to the growth of its length. Furthermore, the male mackerel condition factor ranged from 0.95 to 1.41, which illustrates the health condition of the fish. A value above 1 indicates that the fish is in good condition.
Understanding the Growth Pattern
The growth pattern of male mackerel is a crucial aspect of their biology. The negative allometric growth pattern observed in this study suggests that the growth of fish weight is not directly proportional to the growth of its length. This is an important finding, as it can have implications for the management of fish populations. For instance, if the growth pattern of male mackerel is not taken into account, it may lead to overfishing or underfishing, which can have negative consequences for the sustainability of the fish population.
Reproductive Aspects
In terms of reproduction, the study found that the male mackerel genitals were in a balanced condition. The distribution of male and female fish was even, which is essential for the continuity of the population. The Gonadosomatic Index (IKG) increased along with the increase in the Gonad Maturity Index (TKG). The highest IKG value was found in November, which was 4.65% for male fish and 4.63% for female fish. This suggests that November is the best time for fish to reproduce.
Fecundity and Egg Diameter
The study also found that female male mackerel fecundity ranged from 11,395 to 49,614 items. This indicates a fairly high reproductive capacity, allowing the fish population to remain stable despite facing fishing pressure. The diameter of male mackerel eggs was classified as partial spawner, indicating that this fish does not remove all of its eggs at once, but in a different time. The first size ripe for a measured male bloated gonad was between 143.88 to 152.55 mm.
Conclusion
The research on male bloated reproductive biology (Rastrelliger kanagurta) conducted in Tanjung Tiram provides valuable insights into the pattern of growth and reproduction of this fish. These findings are not only beneficial for further research but also have important implications for sustainable fisheries management. A good management will help maintain the sustainability of bloated fish as a source of livelihoods of fishermen and maintain the balance of marine ecosystems.
Recommendations for Sustainable Fisheries Management
Based on the findings of this study, several recommendations can be made for sustainable fisheries management. Firstly, the growth pattern of male mackerel should be taken into account when setting fishing quotas or regulations. Secondly, the reproductive biology of male mackerel should be monitored regularly to ensure that the fish population remains stable. Finally, the fishing pressure on male mackerel should be reduced to prevent overfishing and maintain the balance of marine ecosystems.
Future Research Directions
This study provides a foundation for further research on the reproductive biology of male mackerel. Future studies can focus on investigating the effects of environmental factors, such as temperature and salinity, on the growth and reproduction of male mackerel. Additionally, research can be conducted on the impact of fishing pressure on the sustainability of male mackerel populations.
Conclusion
In conclusion, the study on male bloated reproductive biology (Rastrelliger kanagurta) conducted in Tanjung Tiram provides valuable insights into the pattern of growth and reproduction of this fish. These findings have important implications for sustainable fisheries management and can help maintain the sustainability of bloated fish as a source of livelihoods of fishermen and maintain the balance of marine ecosystems.
Frequently Asked Questions (FAQs) about Male Mackerel Reproduction (Rastrelliger Kanagurta)
Q: What is the significance of studying male mackerel reproduction?
A: Studying male mackerel reproduction is crucial for understanding the biology and ecology of this species. It can provide valuable insights into the growth patterns, reproductive biology, and population dynamics of male mackerel, which can inform sustainable fisheries management and conservation efforts.
Q: What is the growth pattern of male mackerel?
A: The growth pattern of male mackerel is characterized by a negative allometric growth pattern, where the growth of fish weight is not directly proportional to the growth of its length. This means that as the fish grows in length, its weight does not increase at the same rate.
Q: What is the condition factor of male mackerel?
A: The condition factor of male mackerel ranges from 0.95 to 1.41, which indicates that the fish is in good condition. A condition factor above 1 suggests that the fish is healthy and well-nourished.
Q: What is the reproductive biology of male mackerel?
A: The reproductive biology of male mackerel involves the production of eggs and sperm. The study found that the male mackerel genitals were in a balanced condition, with an even distribution of male and female fish. The Gonadosomatic Index (IKG) increased along with the increase in the Gonad Maturity Index (TKG), indicating that November is the best time for fish to reproduce.
Q: What is the fecundity of female male mackerel?
A: The fecundity of female male mackerel ranges from 11,395 to 49,614 items, indicating a fairly high reproductive capacity. This suggests that the fish population can remain stable despite facing fishing pressure.
Q: What is the diameter of male mackerel eggs?
A: The diameter of male mackerel eggs is classified as partial spawner, indicating that this fish does not remove all of its eggs at once, but in a different time. The first size ripe for a measured male bloated gonad was between 143.88 to 152.55 mm.
Q: What are the implications of this study for sustainable fisheries management?
A: The study provides valuable insights into the growth patterns and reproductive biology of male mackerel, which can inform sustainable fisheries management. A good management will help maintain the sustainability of bloated fish as a source of livelihoods of fishermen and maintain the balance of marine ecosystems.
Q: What are the recommendations for sustainable fisheries management based on this study?
A: Based on the findings of this study, several recommendations can be made for sustainable fisheries management. Firstly, the growth pattern of male mackerel should be taken into account when setting fishing quotas or regulations. Secondly, the reproductive biology of male mackerel should be monitored regularly to ensure that the fish population remains stable. Finally, the fishing pressure on male mackerel should be reduced to prevent overfishing and maintain the balance of marine ecosystems.
Q: What are the future research directions based on this study?
A: This study provides a foundation for further research on the reproductive biology of male mackerel. Future studies can focus on investigating the effects of environmental factors, such as temperature and salinity, on the growth and reproduction of male mackerel. Additionally, research can be conducted on the impact of fishing pressure on the sustainability of male mackerel populations.
Q: What are the benefits of studying male mackerel reproduction?
A: Studying male mackerel reproduction can provide valuable insights into the biology and ecology of this species, which can inform sustainable fisheries management and conservation efforts. It can also help maintain the sustainability of bloated fish as a source of livelihoods of fishermen and maintain the balance of marine ecosystems.