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Maeva Giraudo Audrey Bruneau Andrée D. Gendron Philippe Brodeur Martin Pilote David J. Marcogliese Christian Gagnon Magali Houde 《Environmental science and pollution research international》2016,23(18):18073-18084
A multi-disciplinary approach was used to evaluate the health of yellow perch (Perca flavescens) in the St. Lawrence River (Quebec, Canada), which is experiencing a severe population decline in the downstream portion of the river. Physiological parameters, liver alterations, trace metal concentrations, parasite prevalence and abundance, stable isotope composition, and the presence/absence of the viral hemorragic septicemia virus (VHSV) were evaluated in perch collected at six sites along the river: Lake St. François, Lake St. Louis (north and south), Beauregard Island, and Lake St. Pierre (north and south). Trace metal concentrations in surface water were higher in Lake St. Louis and downstream of a major urban wastewater treatment plant discharge, indicating that this effluent was a significant source of Cu, As, Ag, Zn, and Cd. Levels of Pb in surface water exceeded thresholds for the protection of aquatic life in Lake St. Louis and were negatively correlated with body condition index in this lake. In Lake St. Pierre, Cu, Ag, and Cd bioaccumulated significantly in perch liver and lower body condition index and greater liver damage were observed compared to upstream sites. Parasite analyses indicated a higher abundance of metacercariae of the trematodes Apophallus brevis and Diplostomum spp. in Lake St. Louis, and VHSV was not detected in the liver of yellow perch for all studied sites. Overall, results suggested that the global health of yellow perch from Lake St. Pierre is lower compared to upstream studied sites, which could contribute to the documented population collapse at this site. 相似文献
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Bruneau Audrey Landry Catherine Giraudo Maeva Douville Mélanie Brodeur Philippe Boily Monique Gagnon Pierre Houde Magali 《Environmental science and pollution research international》2016,23(18):18211-18221
Environmental Science and Pollution Research - Multi-biological level assessments have become great tools to evaluate the health of aquatic ecosystems. Using this approach, a complementary study... 相似文献
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Maeva Judith Orliac Pierre-Olivier Antoine Grégoire Métais Laurent Marivaux Jean-Yves Crochet Jean-Loup Welcomme Syed Rafiqul Hassan Baqri Ghazala Roohi 《Die Naturwissenschaften》2009,96(8):911-920
New dental remains of listriodont suids are described from the lower member of the early to middle Miocene Vihowa Formation
of the Bugti Hills, Pakistan. The material is homogeneous in terms of morphology and dimensions and referred as a whole to
Listriodon guptai Pilgrim, 1926. This species is also mentioned in coeval deposits of the Zinda Pir Dome, Pakistan, dating back to ca. 19 Ma.
The early occurrence of an advanced listriodont in Pakistan constrains the age of acquisition of several characters correlated
to lophodonty within Listriodontini, and raises major questions about the early history of the Old World Listriodontinae.
Strong morphological similarity between Listriodon guptai and the African species Listriodon akatikubas found in the late early Miocene of Maboko (Kenya, ca. 16.5 Ma) suggests that this latter is most probably a migrant originating
from Asia. 相似文献
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