Detection and occurrence of microplastics in the stomach of commercial fish species from a municipal water supply lake in southwestern Nigeria

Abstract

Microplastics (MPs) are physical anthropogenic pollutants and their ability to act as contaminant vectors in biological matrices is of serious ecosystem and human health concern. In the present study, we have, for the first time, screened and detected MPs in the stomach of a select group of commonly consumed fish species from a municipal water supply lake (Eleyele) in Nigeria. A total of 109 fish samples consisting of eight (8) species: Coptodon zillii

Microplastic pollution in African countries’ water systems: a review on findings, applied methods, characteristics, impacts, and managements

“…The small-sized ranged from 0.011 to 0.5315 mm MP abundance was found in the river water bodies; Obiaraedu, Nwangele, Okumpi, Ogbajarajara, and Onuezuze Rivers (Ebere et al 2019 ), Bloukrans River in the eastern periphery of the Mediterranean Sea (Nel et al 2018 ), Bloukrans River (Nel et al 2019 ). The size of MP abundance from the three studied lakes, Oxbow Lake (Biginagwa et al 2016 ), Eleyele Lake (Adeogun et al 2020 ), and Victoria Lake (Oni et al 2020 ) have been recorded as 2.41, 0.827, and < 0.5 mm, respectively. More or less, the estuaries, coastlines, bays, and gulfs of the Mediterranean Sea and the Atlantic Ocean have been observed that a similar length of MP abundance ranged from 0.63 to 2.6 mm.…”

“…These processes have been used to remove interfering organic tissues and inorganic dust also. In this review, the degradation of impurities in the samples was found oxidation with potassium hydroxide (KOH) (Sparks 2020 ; Adika et al 2020 ; Shabaka et al 2020 ; Dahms et al 2020 ), hydrogen peroxide (H 2 O 2 ) (Adeogun et al 2020 ; Oni et al 2020 ; Vilakati et al 2020 ), and sodium hydroxide (NaOH) (Biginagwa et al 2016 ). KOH and H 2 O 2 are most popular and reportedly found in the retrieved literature as well as worldwide used for effective treatment processes as an oxidizing agent.…”

“…Hard plastic pieces (85%) others (15%) for neutron net samples Blue (92%), red (7%), purple (< 1%), transparent (< 1%), green (< 1%) and pink (< 1%) for fibers. Blue (38%), white (25%), orange (25%) and green (13%) for bulk samples transparent (39%), white (35%) and blue (15%) transparent (45%) for neutron net samples – Weideman et al ( 2019 ) Eleyele Lake 124 μm-1.53 mm – – – Adeogun et al ( 2020 ) Central Atlantic Ocean, Coast of Ghana 19.0 to 28.0 cm Pellets (31%), microbeads (29%), burnt film plastics (22%), clear plastic fragment (6%), white plastic fragment (3%), thread plastics (2%) and microfibers (2%) White, green, and clear – Adika et al ( 2020 ) Ogun and Osun rivers – Fibers; fragments – ABS, PE, PP, and PS for Chironomus sp. ; PS, ABS for Siphlonurus sp.…”

“…However other infrequent shapes, such as pellets, irregular shapes, spheres are originated from different commercial goods and transportations, especially occurred in the municipality (Fred-Ahmadu et al 2020 ). The high percentage of filaments, fragments, and fibers particularly were recorded within fish (Adeogun et al 2020 ), larvae (Akindele et al 2020 ), and insect (Dahms et al 2020 ) samples. Spheres and sheet MP percentage abundant were observed in a small proportion as compared with other shapes.…”

“…The MPs in Lake Eleyele were detected from a total of 109 fish samples consisting of eight species and were averagely found as a total of 69.7%. The different abundance is due to the maturity, different organs, and ingestion capacity of the species (Adeogun et al 2020 ). The highest proportion was observed in the stomach.…”