نتایج جستجو برای: freshwater mussels
تعداد نتایج: 31163 فیلتر نتایج به سال:
Riverine species are governed by the physical (i.e. hydrodynamic) forces generated flowing water. Freshwater also disproportionately imperilled compared to terrestrial and marine in large part due widespread anthropogenic alteration of natural flow regimes which organisms adapted. Sedentary such as freshwater mussels (Bivalvia: Unionoida) especially vulnerable because they unable move quickly r...
"Super-blooms" of cyanobacteria that produce potent and environmentally persistent biotoxins (microcystins) are an emerging global health issue in freshwater habitats. Monitoring of the marine environment for secondary impacts has been minimal, although microcystin-contaminated freshwater is known to be entering marine ecosystems. Here we confirm deaths of marine mammals from microcystin intoxi...
—Seasonal differences in glochidial maturity, substrate, and diet were studied to determine how these factors affect the survival and growth of juvenile freshwater mussels. Comparisons were made between juveniles produced in the fall and spring of the year; cultured in sediment, sand, or without substrate; and fed either of two species of small (5–10-mm) green algae. The survival and growth of ...
Freshwater mussels (Order Unionida) are highly threatened. Interspecific competition for food sources with invasive alien species is considered to be one of the factors responsible their decline because successful invaders expected have wider trophic niches and more flexible feeding strategies than native counterparts. In this study, carbon (?13C: 13C/12C) nitrogen (?15N: 15N/14N) stable isotop...
Freshwater Mussels (Bivalvia: Unionida) of Vietnam: Diversity, Distribution, and Conservation Status
Behaviour can be a key component of animal population ecology yet the population consequences of behavioural decisions are poorly understood. We conducted a behavioural and demographic study of the bitterling Rhodeus sericeus, a freshwater fish that spawns in live unionid mussels. We used a population model incorporating game theory decisions and measurements of demographic parameters in order ...
Specific aims of this project included the following: (1) development and validation of assays for endocrine sensitive endpoints in alligators, fish and freshwater mussels for use in interaction and whole mixture studies; (2) determination of an appropriate combined action model for predicting the effects of binary and ternary mixtures of endocrine active compounds; and (3) testing the utility ...
Freshwater mussels (Unionida) are globally imperiled, in part due to largely unexplained mass mortality events (MMEs). While recent studies have begun investigate the possibility that mussel MMEs Eastern USA may be caused by infectious diseases, Western received relatively little attention this regard. We conducted a two-year epidemiologic investigation of role viruses ongoing pearlshell (Marga...
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