Water quality and transpiration responses of Eichornia crassipes at Lake Tana, Ethiopia

Muche, Habtamu; Mucheye, Tadesse; Tadesse, Dessalew

doi:10.1007/s40899-020-00392-w

Cited by 2 publications

(1 citation statement)

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“…It is a fast growing, free‐floating macrophyte, native to South America, but has been introduced to, and naturalized in, several tropical and sub‐tropical regions. This plant has thick, kidney‐shaped leaves and spongy, air‐containing stems, which help the plant float on water surface (Muche et al, 2020). Water hyacinth is considered one of the world's worst invasive aquatic plants, due to its fast growth and reproduction, forming dense mats that block navigation and interfere with fishing, irrigation, and recreation.…”

Section: Introductionmentioning

confidence: 99%

Use of two freshwater macrophytes, water hyacinth ( Eichhornia crassipes ) and coontail ( Ceratophyllum demersum ), as carbohydrate sources in biofloc system for Nile tilapia ( Oreochromis niloticus )

Komara¹,

El‐Sayed

Hamdan

et al. 2022

Aquaculture Research

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Two freshwater macrophytes, water (Eichhornia crassipes) and coontail (Ceratophyllum demersum), were evaluated as carbon sources in biofloc system for Nile tilapia (Oreochromis niloticus), in comparison with molasses and a RAS with 10% water exchange daily (control). All-male tilapia (9.35 g) were stocked in 70-L fibreglass tanks at 10 fish tank −1 and fed on a commercial diet (30% cp) for 60 days. The average water temperature, pH and dissolved oxygen (DO) did not significantly differ (p > 0.05) among all treatments. Total ammonia-nitrogen (TAN) was significantly lower in the control group (0.11 mg L −1 ) than in biofloc treatments (0.15-0.17 mg L −1 ). Nitrite (NO 2 -N) concentrations were significantly lower, while nitrates (NO 3 -N) higher, in bioflocbased treatments (20.23-25.77 mg L −1 ) than in the control group (12.85 mg L −1 ). Biofloc volume (BFV) (28.17-33.50 ml L −1 ) and total suspended solids (TSS) (691-824 mg L −1 )were not significantly different among molasses and macrophytes treatments. The control group displayed lower growth rates and feed efficiency than macrophytesbased groups. Blood parameters, immunological responses, digestive enzymes activities, liver function enzymes and upregulation of IFNγ, TNFα and IL-8 genes were significantly better in molasses-and macrophytes-treated tanks than the control group. These results suggest that water hyacinth and coontail can be used as costless, eco-friendly carbon sources in biofloc systems.

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Section: Introductionmentioning

confidence: 99%