Trophic ecology of twoblotch ponyfish Nuchequula blochii in Kendari Bay, Southeast Sulawesi, Indonesia

Asriyana, Asriyana and Irawati, Nur and Indrayani, Indrayani (2018) Trophic ecology of twoblotch ponyfish Nuchequula blochii in Kendari Bay, Southeast Sulawesi, Indonesia. AACL Bioflux, 11 (1). pp. 66-82. ISSN ISSN 1844-9166 (online); ISSN 1844-8143 (print)

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Abstract

Trophic ecology can be used to determine feeding strategy and indirect energy flux within a fish community, and also explains the trophic interaction between different fish species in a food web. This research was aimed to study the trophic ecology of twobloch ponyfish Nuchequula blochii in Kendari Bay, Southeast Sulawesi. The samples were collected monthly during October 2016 to May 2017 using bottom gillnets with mesh size ¾, 1, 1¼, 1½, and 2 inches. Food composition was analysed using Preponderance Index whereas feeding strategy was determined using Costello method modified by Admunsen. There were 247 fish with the total length and weight ranged from 45.0-119.0 mm and 5.0-31.4 g, respectively. The fish were categorized into 3 groups based on the length and weight sizes. The length sizes were classified into small size (45.0-69.7 mm), medium size (69.8-94.3 mm) and large size (94.4-119.0 mm). Twenty three species of organisms were found in the digestive system of the twoblotch ponyfish dominated by the phytoplankton genus Thallasiothrix. There was a significant difference in the food composition of the fish based on the size groups. Small size fish fed on 9 food organisms dominated by the phytoplankton group. Medium size fish utilized 19 organisms, and large size fish consumed 21 organisms. The twoblotch ponyfish developed mix feeding strategies; specialist and generalist. The specialist strategy was used by the small fish feeding on Thallassiothrix, whereas generalist strategy was employed by the medium and large size fish feeding on the other 22 prey species.

Item Type:	Article
Subjects:	FAKULTAS TEKNIK FAKULTAS TEKNIK > Pendidikan Teknologi Pertanian
Divisions:	FAKULTAS TEKNIK
Depositing User:	Dr. Indrayani Indrayani
Date Deposited:	30 Apr 2023 07:52
Last Modified:	30 Apr 2023 07:52
URI:	http://eprints.unm.ac.id/id/eprint/28059

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