Food Habits of the Endemic Ricefishes (Oryzias Nigrimas, Kottelat 1990) in Poso Lake, Central Sulawesi of Indonesia

Serdiati, Novalina; Arfiati, Diana; Widodo, Maheno Sri; Lelono, Tri Djoko; Gosari, Benny Audy Jaya

doi:10.18551/rjoas.2019-03.16

Cited by 5 publications

(5 citation statements)

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“…According to Zuliani et al (2016), who stated that the RLG of carnivorous fish is 0.2-2.5 cm, omnivores was 0.6-8 cm, and herbivores was 0.8-15 cm. As for Zuliani et al (2016) and Serdiati (2019), suggested that the average intestine length of carnivorous fish was less than 1 cm, 1-3 cm for omnivores, and greater than 3 cm for herbivores. RLG is used as an indicator of the feeding habits of fish by comparing its length to the total length (Serdiati 2019).…”

Section: Relative Length Of Gut Of Oryzias Eversi From Tilanga Poolmentioning

confidence: 85%

“…It is measured to determine the trophic level of fish. The results from measuring the RGL of the fish are categorized as follows: <1 for fish classified as carnivorous, 1-3 for fish classified as omnivorous, and >3 for fish classified as herbivorous (Zuliani et al 2016;Serdiati 2019;Elfidasari et al 2020).…”

Section: Relative Gut Length (Rgl)mentioning

confidence: 99%

“…The turbidity value in Tilanga Pool ranged from 0.1-0.4 NTU, which was relatively low. According to Serdiati (2019), turbidity and sedimentation negatively impact the reproductive process of free-range fish because they directly damage and kill embryos and juveniles.…”

Section: Habitat Environmentmentioning

confidence: 99%

“…generally phytoplankton and zooplankton. This was found in Oryzias sarasinorum (Gani et al 2015) and Oryzias nigrimas (Serdiati 2019). According to Serdiati 2019, to prevent the extinction of the Oryzias sp.…”

Section: Introductionmentioning

confidence: 98%

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Habitat and food habits of the endemic fish Oryzias eversi in Tana Toraja, South Sulawesi, Indonesia

LAMBA,

AMBENG,

ANDRIANI

2023

Biodiversitas

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Abstract. Lamba T, Ambeng, Andriani I. 2023. Habitat and food habits of the endemic fish Oryzias eversi in Tana Toraja, South Sulawesi, Indonesia. Biodiversitas 24: 5137-5145. The population of the medaka fish species, Oryzias eversi, was categorized as Near Threatened by the International Union for Conservation of Nature (IUCN) 2019 due to its restricted distribution and occurrence in a single threatened location. One way to protect this species from extinction is through captive breeding, which requires understanding its habitat conditions and food habits. Therefore, this research aimed to analyze the habitat conditions and food habits of Oryzias eversi (Hadiaty & Nolte, 2012) in Tilanga Pool, Tana Toraja. Purposive random sampling was used to obtain fish samples, while habitat conditions were determined by measuring environmental parameters, and the abundance and diversity of plankton. Food habits were analyzed by calculating the Index of Preponderance (IP) and Relative Gut Length (RGL). The results indicated that O. eversi inhabited a highly polluted habitat with dissolved oxygen content that ranged from 3.95 to 4.16 mg/L. The abundance of phytoplankton and zooplankton ranged from 185-435 cells/L and 10-25 ind/L, respectively. Phytoplankton diversity was in the moderate category, while zooplankton was low, with average values of Diversity Index (H’) ranging from 1.61-1.93 and 0.69-024, respectively. IP and RGL showed that O. eversi was an omnivore-carnivore fish. The average IP of zooplankton and phytoplankton ranged from 0.35-61.11% and 0.69-1.04%, respectively. Meanwhile, the RGL ranged from 0.48 to 0.62, respectively. Cyclops sp. larvae were identified as the primary food source for O. eversi with IP above 40% and Eurycercus sp. with IP range of 4-40% as additional food.

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Section: Relative Length Of Gut Of Oryzias Eversi From Tilanga Poolmentioning

confidence: 85%

Section: Relative Gut Length (Rgl)mentioning

confidence: 99%

Section: Habitat Environmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

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Habitat and food habits of the endemic fish Oryzias eversi in Tana Toraja, South Sulawesi, Indonesia

LAMBA,

AMBENG,

ANDRIANI

2023

Biodiversitas

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“…Mixotrophic cryptomonads, in particular, are recognized to be optimal food for planktivorous consumers [ 43 ]. Various species of the genus Oryzias (medaka) exhibit strategies of herbivores (eating phytoplankton [ 44 ]), omnivores prone to herbivory [ 45 ], or consumers of insects and microalgae [ 46 ].…”

Section: Discussionmentioning

confidence: 99%

Effects of Algicidal Macrophyte Metabolites on Cyanobacteria, Microcystins, Other Plankton, and Fish in Microcosms

Kurbatova,

Berezina,

Sharov

et al. 2023

Toxins

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To control harmful algae blooms (HABs), methods based on natural mechanisms are now required. We investigated the effects of an algicide derived from macrophyte metabolites, namely mixtures of gallic, tetradecanoic, heptanoic, and octanoic acids (1:1:1:1 mass ratio, a total concentration of 14 mg/L), on the biomass of cyanobacteria and other plankton and the production of microcystins under experimental conditions. Two types of microcosms have been created: simple (microalgae, cyanobacteria, and zooplankton) and complex (microalgae, cyanobacteria, zooplankton, and planktivorous fish). We observed the dynamics of the phytoplankton structure, the concentrations of microcystins and chlorophyll-a, hydrochemistry, and the status of zooplankton and fish in both types of microcosms with and without algicide for one month (from 19 July to 19 August 2021). The introduction of algicide caused changes in phytoplankton structure, a drop in cyanobacterial biomass, and a decrease in the total concentration of microcystins. Surprisingly, the contributions of the most toxic microcystins (LR form) were higher in both types of microcosms exposed to algicide than in microcosms without algicide. The inhibitory effect on the cyanobacterial biomass was most significant in complex ecosystems (containing fish), while it was only observed at the end of the exposure in simple ecosystems. Not only algicide but also phytoplankton consumed by fish and zooplankton, as well as nutrient excretory activity by both consumers, seem to have impact on cyanobacterial biomass. This study found that the using chemical substances similar to macrophyte metabolites can help regulate HABs and cyanotoxins. However, the results differ depending on ecosystem type.

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Checklist of endemic (Adrianichthyidae, Gobiidae, Zenarchopteridae) and introduced fish in Lake Poso, Sulawesi, Indonesia

Bandjolu¹,

Madiyono²,

Herjayanto

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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Lake Poso is one of the ancient lakes in the world. This lake is known to have high diversity of endemic fish. Several exotic fish species have been introduced to increase the fisheries production in the lake. However, it is reported that the introduced fish is one of the causes of the threat of the existence of endemic fish in this lake. This study aimed to obtain the latest information on endemic (Adrianichthyidae, Gobiidae, and Zenarchopteridae), and introduced fish in Lake Poso. The research was carried out from May to July 2019 at 17 stations on the coast and rivers of Lake Poso. Fish were collected using a seine net, tray net, and hook and line. The results showed that there were 13 species of fish belonging to eight families and 11 genera. A total of six endemic fish species were still found in this study, namely Adrianichthys oophorus, Oryzias nebulosus, O. nigrimas, O. orthognathus, Mugilogobius sarasinorum, and Nomorhamphus celebensis. Seven species of introduced fish were found, namely Anabas testudineus, Aplocheilus panchax, Channa striata, flowerhorn (Cichlasoma sp.), Melanocromis auratus, Oreochromis niloticus, and Trichopodus trichopterus. Cichlids (flowerhorn, M. auratus, and O. niloticus) have the potential to be invasive due to their adaptability and ease of reproduction in Lake Poso. Conservation of the fish endemic to Lake Poso must be a serious concern for the government, academics, and the community. Ex-situ conservation can be a strategy to conserve the endemic fish of Lake Poso through controlled captivity.

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Food Habits of the Endemic Ricefishes (Oryzias Nigrimas, Kottelat 1990) in Poso Lake, Central Sulawesi of Indonesia

Cited by 5 publications

References 0 publications

Habitat and food habits of the endemic fish Oryzias eversi in Tana Toraja, South Sulawesi, Indonesia

Habitat and food habits of the endemic fish Oryzias eversi in Tana Toraja, South Sulawesi, Indonesia

Effects of Algicidal Macrophyte Metabolites on Cyanobacteria, Microcystins, Other Plankton, and Fish in Microcosms

Checklist of endemic (Adrianichthyidae, Gobiidae, Zenarchopteridae) and introduced fish in Lake Poso, Sulawesi, Indonesia

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