A new species of the genus Pristella Eigenmann, 1908 (Pristella crinogi sp. nov.) is described from middle rio Tocantins and São Francisco basins, Brazil. The can be diagnosed its two congeners, ariporo Conde-Saldaña, Albornoz-Garzón, García-Melo, Villa-Navarro, Mirande, Lima, 2019 maxillaris (Ulrey, 1894), by a combination color pattern teeth morphology characters. phylogenetic analysis recove...

The study identified the origin, habitat and ecological classification of 78 bony fish species belonging to 30 families available in Khulna division. Of total species, 9 were found exotic. Among collected a 69 inhabitants freshwaters while 4 both fresh brackish waters rest 5 marine waters. fishes belonged eight trophic guilds; carnivore (43) was dominant group followed by omnivore (16), insecti...

The B cell receptor and secreted antibody are at the nexus of humoral adaptive immunity. In this review, we summarize what is known of the immunoglobulin genes of jawed cartilaginous and bony fishes. We focus on what has been learned from genomic or cDNA sequence data, but where appropriate draw upon protein, immunization, affinity and structural studies. Work from major aquatic model organisms...

The Triassic, lasting from 252 to 201 million years (Myr) ago, was crucial in the origin of modern ecosystems. It is the seventh of the 11 geological systems or periods into which the Phanerozoic, the fossiliferous last 540 million years, of Earth history is divided. It might seem strange to select just one of these divisions of time as somehow more significant than the others. However, this wa...

Soft tissues of species of marine fauna; crabs (Crustacea), oysters (Pelecypoda, Bivalvia), sea stars (Asterroidea), sea urchin (Echinoidea) and bony fishes (Osteichtyes) sampled along the Kenya-Mombasa coastal region were analyzed to determine the levels of organochlorine pesticides (OCPs). Analysis was done using gas chromatography with an electron capture detector. This study showed that mar...