We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Ecologia alimentar e da contaminação por microplásticos em Rhizoprionodon porosus (Poey, 1861) na costa do estado de Pernambuco
AI summary Read the abstract
Researchers examined the feeding ecology and microplastic contamination of Caribbean sharpnose sharks (Rhizoprionodon porosus) off Pernambuco, Brazil, finding 100% microplastic occurrence across all life stages with polyethylene fibers as the dominant type, and identifying trophic transfer as a likely route given that multiple prey fish species were also contaminated.
Este estudo descreve a ecologia alimentar, a contaminação por microplásticos (MP) e a distribuição espacial de cada fase ontogenética de R. porosus, em função de parâmetros espaço-temporais no litoral leste da América do Sul. Considerando a pesca com redes de emalhe de superfície, a CPUEN (densidade) e CPUEW (biomassa) para todos os indivíduos foram 1,3 ± 0,3 ind.dia-1 e 877 ± 232 g.dia-1. Neonatos (0,9 ± 0,3 ind.dia-1 e 166,8 ± 64 g.dia-1) e jovens (2,3 ± 0,3 ind.dia-1 e 1351,7 ± 129 g.dia-1) foram capturados durante todas as estações, exceto a adultos (0,7 ± 0,3 ind.dia-1 e 1111,8 ± 556,4 g.dia-1) que provavelmente se deslocam para águas abertas adjacentes durante o final da estação seca. A dieta de R. porosus consistiu principalmente de peixes (FO=71,8%). Todas as fases ontogenéticas estavam contaminadas por MP (FO=100%). Entre os detritos plásticos detectados em R. porosus, 91,6% eram microplásticos (< 5 mm) dos quais as fibras azuis contribuíram com 53,7%. As amostras de microplástico foram analisadas por Microscopia Óptica (MO), infravermelho por Transformada de Fourier (FTIR), Microscopia Eletrônica de Varredura (MEV) e pela técnica EDS (espectroscopia de raios-X por dispersão de energia) e identificadas como polietileno A relação observada entre a contaminação por microplásticos e o comportamento alimentar de R. porosus pode ser uma evidência de transferência trófica de microplásticos. R. porosus apresenta alta taxa de ingestão de microplástico quando comparado a peixes de níveis tróficos inferiores. Além disso, muitos peixes predados por R. porosus estavam contaminados com microplásticos (por exemplo, Eugerres brasilianus, Harengula clupeola, Rhinosardinia bahiensis, Anchovia clupeoides, Monacanthus ciliatus, Polydactylus virginicus, Trachinocephalus myops, Eucinostomus melanopterus e Lutjanus analis), sugerindo a probabilidade de transferência trófica.
More Papers Like This
Ecologia alimentar e da contaminaçâo por microplásticos de Anchovia clupeoides e Cetengraulis edentulus (Swainson, 1839) no estuário do Rio Goiana - Resex Acaú-Goiana (PE/PB)
AI summary Read the abstract
Researchers studied the feeding ecology and microplastic contamination of two anchovy species (Anchovia clupeoides and Cetengraulis edentulus) across life stages in the Goiana River estuary, northeast Brazil. Microplastics, predominantly black polyethylene fibers, were found in both species, with contamination patterns linked to diet composition and seasonal estuary dynamics.
Feeding Ecology and Microplastic Contamination of Planktophagous Fishes in a tropical Southwestern Atlantic Estuarine Ecosystem
AI summary Read the abstract
Feeding ecology and microplastic contamination of two planktophagous fish species (A. clupeoides and C. edentulus) were studied in a tropical Brazilian estuary, finding both species ingested microplastics—with contamination rates varying by season, body size, and estuarine position, reflecting their copepod-dominated diets.
Microplásticos na Baía de Guanabara, RJ: acumulação nos sedimentos e ingestão pela corvina, Micropogonias Furnieri (Desmarest,1823)
AI summary Read the abstract
Researchers quantified microplastics in seafloor sediments and digestive tracts of whitemouth croaker (Micropogonias furnieri) across Guanabara Bay, Brazil, finding uniformly high concentrations of transparent polyester fibers in both sediments and fish, with smaller fish ingesting proportionally more plastic, suggesting direct sediment ingestion as a primary exposure pathway.
Foraging Habit Determines the Amount of Microplastics Ingested in Five Fish Species from a Northern Adriatic Lagoon
AI summary Read the abstract
A two-season survey of five commercially important fish species in a Northern Adriatic lagoon found that microplastic ingestion rates varied dramatically by feeding strategy — from 16% in surface-feeding silversides to 92% in detritus-feeding mullet — with polyethylene and polypropylene fibres and fragments identified by Raman spectroscopy. The strong link between foraging behaviour and microplastic load has direct implications for food safety risk assessments, since bottom-feeding fish consumed by humans carry the highest burdens.
Does the trophic guild influence microplastic ingestion in nursery areas? A case study on a southwestern Atlantic mangrove-dominated estuary
AI summary Read the abstract
Researchers analyzed microplastic ingestion in ten fish species from a mangrove-dominated estuary in Brazil's Tropical Atlantic, finding plastics in 61% of 145 specimens. Zooplanktivorous species ingested the most (averaging 2.33 MPs per individual), with polystyrene and polypropylene dominating.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.