Consulta: subjectFacets:"Sublethal"
Registros recuperados: 3
Data/hora: 10/06/2024 19:02:29

Evaluation of toxicity of Deepwater Horizon slick oil on spat of the oyster Crassostrea virginica
Provedor de dados: 5
Autores: Vignier, Julien; Rolton, Anne; Soudant, Philippe; Chu, Fu-lin E.; Robert, Rene; Volety, Aswani K.
The 2010 explosion of the Deepwater Horizon (DWH) oil rig generated the largest marine oil spill in US history with millions of barrels of crude oil released in the Gulf of Mexico (GoM). The eastern oyster, Crassostrea virginica, is an ecologically and economically important species in the northern GoM. Due to its biological characteristics (sessile, filter feeding), juvenile oysters may have been affected. This study investigated the effects of surface-collected DWH oil prepared as high-energy water-accommodated fraction (HEWAF) on the survival of 2-month-old oyster spat, and evaluated the potential impacts of HEWAF on particle clearance rate and spat tissue. Exposure of oysters to a range of oil/HEWAF (0-7-66-147-908-3450 mu g tPAH50 (sum of 50...
Tipo: Text
Palavras-chave: Oyster spat; Deepwater Horizon oil; Sublethal; Tissue; Inflammatory response; Histopathology.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00425/53615/54548.pdf

Combined oral toxicity of azaspiracid-1 and yessotoxin in female NMRI mice
Provedor de dados: 5
Autores: Aasen, John A. B.; Espenes, Arild; Miles, Christopher O.; Samdal, Ingunn A.; Hess, Philipp; Aune, Tore.
For many years, the presence of yessotoxins (YTXs) in shellfish has contributed to the outcome of the traditional mouse bioassay and has on many occasions caused closure of shellfisheries. Since YTXs do not appear to cause diarrhoea in man and exert low oral toxicity in animal experiments, it has been suggested that they should be removed from regulation. Before doing so, it is important to determine whether the oral toxicity of YTXs is enhanced when present together with shellfish toxins known to cause damage to the gastrointestinal tract. Consequently, mice were given high doses of YTX, at 1 or 5 mg/kg body weight, either alone or together with azaspiracid-1 (AZA1) at 200 μg/kg. The latter has been shown to induce damage to the small intestine at this...
Tipo: Text
Palavras-chave: Azaspiracid-1; AZA1; Yessotoxin; YTX; Marine algal toxins; Absorption; Pathology; Sublethal; NMRI; Mice; LC-MS/MS; Oral toxicity.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00034/14477/11776.pdf

Decrease in Pupation and Adult Emergence of Plutella xylostella (L.) treated with Hexaflumuron
Provedor de dados: 117
Autores: Mahmoudvand,Mohammad; Abbasipour,Habib; Sheikhi Garjan,Aziz; Reza Bandani,Ali.
The oligophagous pest Plutella xylostella (L.) is a major crucifer pest in Tehran Province, Iran. Hexaflumuron is an insect growth regulator insecticide with good effects on immature insect stages. The objective of this study was to investigate the effects of two sublethal concentrations (LC10 and LC25) of hexaflumuron on some biological parameters of P. xylostella larvae, such as birth rate (b), death rate (d), finite rate of increase (&amp;#955;), generation time (T), sex ratio, pupation rate, and adult emergence. Results showed that hexaflumuron decreased the total number of eggs and oviposition and post-oviposition periods, pupation, and adult emergence in the treated generation, b, and &amp;#955;. Hexaflumuron also increased T, d, and the...
Tipo: Journal article
Palavras-chave: Hexaflumuron; Sublethal; Birth rate; Death rate; Oviposition period.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000200007