Scuds (Gammaridae) and Darters (Percidae) Dominate Aquatic Communities in a Stream Exhibiting Levels of Specific Conductance Exceeding 4,000 µS/cm
نویسندگان
چکیده
منابع مشابه
Fucosidases of Sperm and Milt in Darters (Percidae: Etheostomatini)
Darters (Percidae: Etheostomatini) offer attractive opportunities for analysis of the evolution of reproductive barriers and the molecular basis of fertilization. Here we report some basic characteristics of the sperm of darters, and, to our knowledge, the first report of sperm associated -L-fucosidase in fishes. Fluorometric enzyme assays using 4methylumbelliferyl-alpha-L-fucopyranoside [4-MU-...
متن کاملPhylogeny and temporal diversification of darters (Percidae: Etheostomatinae).
Discussions aimed at resolution of the Tree of Life are most often focused on the interrelationships of major organismal lineages. In this study, we focus on the resolution of some of the most apical branches in the Tree of Life through exploration of the phylogenetic relationships of darters, a species-rich clade of North American freshwater fishes. With a near-complete taxon sampling of close...
متن کاملRelationship between species co-occurrence and rate of morphological change in Percina darters (Percidae: Etheostomatinae).
When the morphological diversity of a clade of species is quantified as the among-species variance in morphology, that diversity is a joint consequence of the phylogenetic structure of the clade (i.e., temporal pattern of speciation events) and the rates of change in the morphological traits of interest. Extrinsic factors have previously been linked to variation in the rate of morphological cha...
متن کاملPhylogenetic and coalescent strategies of species delimitation in snubnose darters (Percidae: Etheostoma).
The rapid accumulation of multilocus data sets has led to dramatic advances in methodologies for estimating evolutionary relationships among closely related species, but relatively less advancement has been made in methods for discriminating between competing species delimitation hypotheses. Multilocus data sets provide an advantage in testing species delimitation scenarios because they offer a...
متن کاملBody shape variation within and among three species of darters (Perciformes: Percidae)
Using geometric morphometric (GM) techniques, we quantified intra and interspecific variation in female body shape using five collections each of Etheostoma caeruleum Storer, Etheostoma nigrum Rafinesque, and Etheostoma stigmaeum (Jordan). Nested multivariate analysis of variance showed significant variation in body shape among populations (Wilks’ L1⁄4 0.0687, F144,7585.11⁄4 19.35, P< 0.0001), ...
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ژورنال
عنوان ژورنال: International Journal of Environmental Monitoring and Analysis
سال: 2018
ISSN: 2328-7659
DOI: 10.11648/j.ijema.20180602.12