Instituto Nacional de Saúde Doutor Ricardo Jorge
URI permanente desta comunidade:
Navegar
Percorrer Instituto Nacional de Saúde Doutor Ricardo Jorge por Objetivos de Desenvolvimento Sustentável (ODS) "15:Proteger a Vida Terrestre"
A mostrar 1 - 2 de 2
Resultados por página
Opções de ordenação
- Bioaccumulation and elimination kinetics of metals and polycyclic aromatic hydrocarbons in Hermetia illucens larvae: Implications for risk mitigation of selected contaminants in insect farmingPublication . Mostafaie, Amid; Silva, Patricia V.; Prodana, Marija; Silva, Ana Rita R.; Pinto, José N.; Duarte, Regina M.B.O.; Alvito, Paula; Coelho, Inês; Rego, Andreia; Lopes, Iva G.; Brooks, Bryan W.; Loureiro, Susana; Cardoso, Diogo N.Rapidly expanding insect farming industries worldwide are raising concerns about introducing contaminants into food chains. One of the dominant species in this new bioindustry, the black soldier fly (Hermetia illucens), offers diverse benefits ranging from protein production to waste management, biofuel, and pharmaceutical applications. Recent studies have highlighted the ability of insects to accumulate metals; however, knowledge of their ability to eliminate contaminants is needed. Similarly, information regarding the accumulation of polycyclic aromatic hydrocarbons (PAHs) is lacking. This study aimed to understand how H. illucens larvae accumulate and eliminate metals and PAHs from contaminated substrates. We performed two-phase bioaccumulation experiments followed by toxicokinetic modelling to estimate uptake and elimination rate constants and half-lives in H. illucens. During the uptake phase, insects were exposed for five days to contaminated substrates at EU maximum feed concentrations: 2 mg kg−1 for As and Cd, 10 mg kg−1 for Pb, and 12.5 μg kg−1 for each of four PAHs (benzo[a]pyrene, benz[a]anthracene, benzo[b]fluoranthene, chrysene). In the second phase, insects were exposed to non-contaminated substrates for five days to evaluate elimination. Results showed metal accumulation with kinetic bioaccumulation factors of 4.26, 1.16, and 1.31 for Cd, As, and Pb, respectively. A one-day depuration reduced As and Pb below regulatory thresholds; Cd required three days. Minimal to no accumulation was observed for B[a]P and B[b]F, with higher uptake for B[a]A. PAH half-lives were under one day. These findings, from controlled experiments with limited contaminants, support incorporating a depuration phase for risk mitigation in H. illucens waste-to-protein systems.
- Glyphosate in the Iberian Peninsula: Evaluating risks to Iberian wildlifePublication . Baptista, Catarina Jota; Marques, Gonçalo Nogueira; Gonçalves, Luísa Lima; Assunção, Ricardo; Martinez-Haro, MónicaGlyphosate [N-(phosphonomethyl)glycine] (GlyP) is an herbicide extensively used worldwide, including the Iberian Peninsula. It is mainly used in agricultural landscapes but also in urban areas, in railways, and even in water bodies. Despite glyphosate’s large use, there is a paucity of research on its exposure and its potential effects on wildlife living treated environments. In recent years, an increasing number of studies have warned about the effects of this herbicide namely, on oxidative stress, and on liver and kidney in different taxa. Additionally, some studies also suggested endocrine disruption capacity in reptiles or genotoxicity in fish. Most of these studies have been carried out on experimental animals, in laboratory conditions, so the real exposure and potential effects on wildlife is largely unknown. In this context, this review is intended to help understand the ecological consequences that glyphosate may be exerting on wildlife that inhabit the Iberian Peninsula.