Anisakid nematode larvae from Trichiurus lepturus off coast of Rio de Janeiro were studied using light, laser confocal and scanning electron microscopy, in addition to a molecular approach. Mitochondrial cytochrome c-oxidase subunit 2 (mtDNA cox-2), partial 28S (LSU) and internal transcribed spacers (ITS-1, 5.8S, ITS-2) of ribosomal DNA were amplified using the polymerase chain reaction and seq...

The contraction and relaxation events of the muscle is mediated by the coordination of many important calcium cycling proteins of ryanodine receptor (RYR), troponin C (TNNC), parvalbumin (PVALB), sarcoendoplasmic reticulum calcium transport ATPase (SERCA) and calsequestrin (CASQ). In higher vertebrates, the expression level of calcium cycling proteins are positively correlated to the muscle con...

Organochlorine pesticides (OCP) are legacy anthropogenic compounds known to persist for several years in the environment. The continuous use of some OCP, such as DDT, after restrictions developing countries cause concern, due their deleterious effects marine life and humans. Studies assessing OCP contamination coastal environments still scarce South America there is a need understand impacts fr...

Commercially important hairtails, Trichiurus spp., are widely distributed throughout China’s marine waters. Because eggs of these species difficult to identify and the taxonomy group has recently been resolved, their spawning grounds in northern South China Sea (SCS) not well known. We identified three ( T. japonicus , nanhaiensis brevis ) using DNA barcodes spring late summer–autumn ichthyopla...