Effects of Pollution on Fish

Häder, Donat‐P.

doi:10.1007/978-3-030-75602-4_3

Cited by 1 publication

(1 citation statement)

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“…The abundance and distribution of sh populations in aquatic ecosystems are in uenced by various factors such as the availability of resources and the physical and chemical properties of water tolerable to sh populations (Odum and Barrett 1971;Carpenter et al 2011). Polluted rivers, which exhibit poor water quality, negatively affect aquatic life, potentially leading to the extinction of species that cannot adapt to unfavorable environmental conditions (Häder 2021). The survival of wild sh is directly threatened by several factors such as the destruction and loss of habitats, introduction of non-native species, over shing, water pollution, competition for water resources, and impacts of global warming (Arthington et al 2016; Heino et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Adaptation and domestication of endangered wild betta fish (Betta channoides) originating from East Kalimantan, Indonesia

Permana,

Priyadi,

Nur

et al. 2024

Preprint

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Betta channoides is an endemic freshwater fish species in Indonesia; however, it has been classified as endangered due to its declining wild populations. As part of the efforts in conserving wild B. channoides populations, this study was conducted to establish a methodology for adapting and domesticating B. channoides through breeding and restocking initiatives. B. channoides samples were successfully acclimated and bred in captivity in Depok City, West Java, Indonesia, which is significantly distant from its native habitat in Pampang Village, Samarinda City, East Kalimantan, Indonesia. A glass aquarium was the most suitable rearing container for inducing minimal stress, as indicated by the lowest blood glucose levels recorded (43.67 ± 8.34 mg/dL in males and 59.00 ± 9.00 mg/dL in females). Chironomus sp. larvae served as the optimal nutrition source for gonadal maturation, resulting in enhanced weight gain (0.32 ± 0.07 g in males and 0.38 ± 0.12 g in females) and the highest number of mature fish (seven males and six females). The size of males exhibited a more significant effect on egg production, as demonstrated by higher R2 values for length (0.3311) and weight (0.2749). After the yolk absorption period of 7 days, the larvae were fed for the first time. The detailed analysis of the reproductive traits and early developmental stages of B. channoides contributes to our understanding of its biology and serves as a foundation for further improvements in captive breeding and aquaculture methodologies.

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