Impaired growth performance of Wami Tilapia juveniles (Oreochromis urolepis)(Norman, 1922) due to microplastic induced degeneration of the small intestine

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dc.contributor.authorMbugani, J. J.
dc.contributor.authorMachiwa, J. F.
dc.contributor.authorShilla, D. A.
dc.contributor.authorJoseph, D.
dc.contributor.authorKimaro, W. H.
dc.contributor.authorKhan, F. R.
dc.date.accessioned2023-05-25T08:30:38Z
dc.date.available2023-05-25T08:30:38Z
dc.date.issued2022
dc.descriptionFull text article. Also available at https://doi.org/10.3390/microplastics1030025en_US
dc.description.abstractMicroplastics-induced histopathological changes in gastrointestinal tracts of fish have been widely reported. However, the translation of adverse effects in the gut to impacts on growth are understudied. This study investigated the effect of MP-induced small intestinal histomorphological changes on growth performance of Oreochromis urolepis juveniles. Sixty larvae were exposed in control (0), 1, 10, and 100 polyethylene microplastic particles (PE MPs)/mL treatment groups. On day 65, juveniles were euthanized, dissected, and biometric data were taken. Small intestine histomorphological lesion index (HLI) was calculated following histological preparation using routine hematoxylin and eosin procedure. Results showed increase in HLI proportional to PE MPs exposure dose. These deteriorations equally reduced growth in final weight, weight gain and total length (One-Way ANOVA, p > 0.05), and Specific Growth Rate (SGR) (Kruskal–Wallis Test, p > 0.05), though there were insignificant differences between treatment groups. Condition factors of fishes in control and 1 PE MPs differed significantly and with other treatment groups (Tukey HSD, p < 0.05). Small intestines HLI correlated significantly with growth pattern (Spearman, r = 1.00, p = 0.01), condition factors (Pearson, r = −0.995, p < 0.05), final weight, weight gain, and total length (Spearman, r = −1.00, p = 0.01) but not with SGR. The allometric growth pattern changed towards isometric corresponding to increasing HLI. These findings suggest that MPs damaged small intestine structure and thus impaired digestion and nutrients absorption functions which disrupted growth. Such effects may impair juveniles’ ability to escape enemies, find food, and eventually reproduce, and therefore require further study.en_US
dc.identifier.citationMbugani, J. J., Machiwa, J. F., Shilla, D. A., Joseph, D., Kimaro, W. H., & Khan, F. R. (2022). Impaired growth performance of Wami Tilapia juveniles (Oreochromis urolepis) (Norman, 1922) due to microplastic induced degeneration of the small intestine. Microplastics, 1(3), 334-345.en_US
dc.identifier.otherURL: https://www.mdpi.com/2673-8929/1/3/25
dc.identifier.otherDOI: https://doi.org/10.3390/microplastics1030025
dc.identifier.urihttp://hdl.handle.net/20.500.12661/3972
dc.language.isoenen_US
dc.publisherMDPIen_US
dc.subjectMicroplasticsen_US
dc.subjectHistomorphological lesion indicesen_US
dc.subjectGrowth performanceen_US
dc.subjectLength-weight relationshipen_US
dc.subjectPhysical parametersen_US
dc.subjectIngestionen_US
dc.subjectWami Tilapia juvenilesen_US
dc.subjectOreochromis urolepisen_US
dc.subjectGastrointestinal tractsen_US
dc.subjectFish growthen_US
dc.subjectFisheries managementen_US
dc.titleImpaired growth performance of Wami Tilapia juveniles (Oreochromis urolepis)(Norman, 1922) due to microplastic induced degeneration of the small intestineen_US
dc.typeArticleen_US
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