نتایج جستجو برای: bivalvia
تعداد نتایج: 3446 فیلتر نتایج به سال:
En Nicaragua los estudios de la Malacofauna del Occidente son relativamente pocos, principalmente para clase Gasterópoda, teniendo como únicas referencias dentro país realizados por MARENA, COMAP, USAID y FUNCOD en el 2002, cual identificaron cerca 106 especies entre flora fauna , se mencionan algunos bivalvos, otro lado Santana Aguilar 2006, identifico 70 bivalvos 92 gasterópodos Reserva Natur...
Most metazoan species have strict maternal inheritance of the mitochondrial genome. In bivalves, a unique inheritance pattern called doubly uniparental inheritance (DUI) occurs in at least seven bivalve families. In this system of mitochondrial inheritance, males inherit and carry mtDNA from both parents, while females only carry mtDNA from the mother. Here, we present evidence of mitochondrial...
The use of static indicator species, in which species are expected to have a similar sensitivity or tolerance to either natural or human-induced stressors, does not account for possible shifts in tolerance along natural environmental gradients and between biogeographic regions. Their indicative value may therefore be considered at least questionable. In this paper we demonstrate how species res...
Global patterns in the functional attributes of organisms are critical to understanding biodiversity trends and predicting biotic responses to environmental change. In the first global marine analysis, we find a strong decrease in functional richness, but a strong increase in functional evenness, with increasing latitude using intertidal-to-outer-shelf bivalves as a model system (N = 5571 speci...
Recent discoveries have shown that endosymbiotic bacteria may be widespread among bivalve species in different habitats. A simple method is described which allows the detection of bacterial-gill association with an ordinary
1. Gravid females of some.North American freshwater mussel species (Bivalvia: Unionidae) display highly modified mantle margins and other reproductive structures which mimic small fish, terrestrial insects, or aquatic macro-invertebrates. We report the responses of fish to these lures, based on the results of laboratory encounters between the following pairs of displaying mussels and fishes: La...
NoRENBURG, J. L., and FERRARIS, J. D. 1990. Cytomorphology of the pedal aperture glands of Mya arenaria L. (Mollusca, Bivalvia). Can. J. Zool. 68: 1137-1144. A glandular cushion, called the pedal aperture gland in this paper, lies adjacent and internal to each of the two mantle margins composing the pedal aperture of the soft-shelled clam Mya arenaria. Two types of glandular cells are found in ...
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