Thyroid hormone (TH) balance is essential for vertebrate development. Deiodinase type 1 (D1) and type 2 (D2) increase and deiodinase type 3 (D3) decreases local intracellular levels of T3, the most important active TH. The role of deiodinase-mediated TH effects in early vertebrate development is only partially understood. Therefore, we investigated the role of deiodinases during early developme...

Fish produce context-specific sounds during social communication, but it is not known how acoustic behaviors have evolved in relation to specializations of the auditory system. Butterflyfishes (family Chaetodontidae) have a well-defined phylogeny and produce pulsed communication sounds during social interactions on coral reefs. Recent work indicates that two sound production mechanisms exist in...

In response to concerns regarding the potential for sub-lethal impacts of barotrauma on reproductively active Chrysophrys auratus during catch and release, 90 males and 90 females representing five reproductive stages (immature or resting--28%, developing--8%, developed--7%, ripe or spawning--23% and spent--34%) were angled from 8-70 m and macroscopically assessed (on-board and then in a labora...

The hydroxylysine-containing glycopeptides from collagenase-Pronase digests of bovine tendon collagen were found to have glucose and galactose as their monosaccharide components. The ratio of galactose to glucose in these glycopeptides was greater than unity and after alkaline hydrolysis both glucosylgalactosylhydroxylysine and galactosylhydroxylysine were found. In order to determine the conte...

In recent decades attention has focused on the development of non-toxic fouling-release coatings based on silicone polymers as an alternative to toxic antifouling coatings. As fouling-release coatings gain market share, they will contribute to environmental contamination by silicones. We report effects of eight model polysiloxane and three commercial foul-release coatings on embryonic developme...

Barramundi (Lates calcarifer, Bloch, 1790) also known as barramundi has high commercially important. Its utilization is not limited to meat, but the swim bladder it produces. Knowledge of genetic aspects very important in designing improvement and conservation activities for this fish. The purpose study was identify species collected from Pesisir Pantai Payum, Merauke Regency using Cytochrome O...

The cystidicolid nematode Salvelinema walkeri (Ekbaum, 1935) is a swim bladder parasite of freshwater salmonids in western North America, ranging from northern California to southern British Columbia. This was found two age-2.0, juvenile coho salmon Oncorhynchus kisutch (Walbaum, 1792) caught the central Gulf Alaska December 1992. represents first record S. offshore waters Pacific Ocean. harbor...