Pseudo-nitzschia-specific PCR primers (PnAll F/R) were designed to amplify a polymorphic region of the internal transcribed spacer 1 (ITS1) from at least 11 Pseudo-nitzschia species. The primers were used to generate environmental clone libraries from Puget Sound, Washington, and Vancouver Island, British Columbia, to confirm that the primers were specific for Pseudo-nitzschia and to determine ...

The limnological characteristics and the phytoplankton community of the pelagic region of the São João River, tributary of the Iguaçu River, Iguaçu National Park were analyzed from August 2008 to July 2009. 221 taxa were identified and the Bacillariophyceae class was the most representative. Bacillariophyceae and Chrysophyceae were the dominant classes in density and Bacillariophyceae in biovol...

Diatom class Bacillariophyceae are world wide distribution and commonly dominated the phytoplankton community. The community of diatom waters Tanjung Luar Fish Landing Based (FLB) has never been reported. This study aims to determine abundance diversity Bacillariophyceae. sampling sites were determined by using a systematic random method. Data analyzed for species abundance, index dominance cal...

A correlation between genome size and cell volume has been observed across diverse assemblages of eukaryotes. We examined this relationship in diatoms (Bacillariophyceae), a phylum in which cell volume is of critical ecological and biogeochemical importance. In addition to testing whether there is a predictive relationship across extant species, we tested whether evolutionary divergences in gen...

Molecular evolutionary rates within two protistan and three metazoan taxa were estimated using divergence times derived from fossil records. The results indicate that the small-subunit rRNA sequences within Dasycladales (Chlorophyta) and Bacillariophyceae evolved at a rate approximately two to three times faster than that estimated within Echinodermata, Mollusca, and Actinistia-Tetrapoda. It wa...

In the present study, total thirty planktonic members from four sampling sites of selected research area in which, twelve phytoplanktons and eighteen zooplanktons each under different groups namely (Chlorophyceae, Bacillariophyceae, Cyanophyceae, Euglenophyceae) (Protozoans, Rotiferans, Cladocerans, Copepods) were recorded respectively. Among all phytoplanktonic groups, Chlorophyceae was domina...

The present study provides a characterization of water quality and plankton samples in earthen fish pond in Rajshahi, Bangladesh. Sampling was done over a period of six months, running from October, 2004 through March, 2005. All the water quality parameters were within the optimal ranges for plankton productivity. Temperatures varied from 19.75 to 27.25 degrees C; transparency, 24.75-29.50 cm; ...

Diatoms are unicellular, eukaryotic, photosynthetic algae belong to Bacillariophyceae, found in both fresh and marine water. They are found in a wide variety of habitats, responsible for up to 25% of the world’s net primary productivity [1]. Diatom is the only organism having genetic ability to mineralize natural silica and to deposit over the frustule in nanoporous sizes. After understanding t...