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Stomach content of commercial fishes from Pak Pra area, Songkhla lagoon |
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| รหัสดีโอไอ | |
| Creator | Tueanta Ranarn |
| Title | Stomach content of commercial fishes from Pak Pra area, Songkhla lagoon |
| Contributor | Preeyakak Konongbua, Wijittra Amornviriyachai, Jaruwan Chusong, Jaruaypon Numnoi, Jamjan Pechsiri |
| Publisher | Faculty of Agriculture |
| Publication Year | 2568 |
| Journal Title | Khon Kaen Agriculture Journal |
| Journal Vol. | 53 |
| Journal No. | 6 |
| Page no. | 1156-1170 |
| Keyword | stomach content, Songkhla lake, commercial fishes |
| URL Website | https://li01.tci-thaijo.org/index.php/agkasetkaj |
| Website title | Khon Kaen Agriculture Journal |
| ISSN | 3027-6497 (Online) |
| Abstract | Pak Pra Canal is a waterway located in the upper part of Songkhla Lagoon. It serves as a transitional zone between freshwater and brackish water ecosystems, resulting in a high diversity of aquatic natural resources. However, various human activities in the area have affected fish populations, leading to their decline. This study aims to investigate the stomach contents and trophic relationships of three economically important fish species in the Ban Pak Pra area: the soldier catfish (Osteogeneiosus militaris), the spotted catfish (Arius maculatus), and the Indian river shad (Corica soborna). A total of 30 individuals of each species were collected per month. Sampling was conducted every two months from March to September 2019. The stomach contents of the fish were analyzed, and the diversity and dietary overlap were calculated. The results revealed that the three economically important fish species from Ban Pak Pra had different stomach content compositions. A total of 16 prey types were identified. All three species are primarily carnivorous. Osteogeneiosus militaris primarily consumed Thanidaceass and chironomid larvae, while Arius maculatus mainly fed on fish and chironomid larvae. Corica soborna primarily fed on zooplankton, such as copepods and cladocerans. The dietary breadth index indicated that Osteogeneiosus militaris had the highest dietary breadth (0.67–0.94), while Corica soborna had the lowest (0.04–0.12). The dietary overlap index showed a high degree of dietary overlap between Osteogeneiosus militaris and A. maculatus (0.44–0.51), whereas both catfish species had very low dietary overlap with Corica soborna. Moreover, all three species exhibited seasonal variations in their diets. This indicates dietary niche partitioning among the species, which helps reduce interspecific competition and reflects their likely occupation of different micro-habitats within this ecosystem. This information can be used to plan and develop policies or action plans, such as prohibiting the harvest of juvenile aquatic animals and establishing habitats, including the creation of aquatic resource conservation zones in areas with abundant aquatic life. Therefore, aquatic resource management should follow an ecosystem-based approach. There should be ongoing monitoring of ecological changes that may result from human activities. Scientific data can also serve as evidence for public forums. |
