Juniper Publishers-Oceanography Open Access Journal

  Abstract Sea waves are important dynamic loadings for the design of offshore structures. Casual observations will indicate that the sea waves are very unpredictable and may not be modeled deterministically. To capture the unpredictable nature of the sea waves, they are generally expressed in terms of a joint probability density function of mean zero crossing period Tz and the significant wave height Hs. Estimation of parameters of the joint distribution can be very challenging, particularly considering the scarcity of data. The joint probability density function (PDF) of Tz and Hs is generally represented as the multiplication of a conditional distribution for Tz given Hs and the marginal distribution of Hs. The estimation of parameters of the joint PDF is addressed in this paper. The available information on North Atlantic, as reported by Det Norske Veritas (DNV), is considered to document its applicability. DNV reported values for all the required parameters. The

 Abstract The status of valid species and distributional range of mudskippers (oxudercine gobies) in Indonesian waters are reviewed here. There are 24 species of mudskippers recently recorded. Refered to seven largest islands region in Indonesia, Sumatra has largest number of mudskippers (14 species), following Java (12 species, Lesser Sundas (11 species), Kalimantan (9 species), West Papua (9 species), Sulawesi (8 species) and Moluccas (8 species). Further research is required to clarify distributional range and to adress conservation challenge of mudskippers in Indonesian waters.  Read more about this article:  https://juniperpublishers.com/ofoaj/OFOAJ.MS.ID.555769.php Read more Juniper Publishers Google Scholar articles  https://scholar.google.com/citations?view_op=view_citation&hl=en&user=V6JxtrUAAAAJ&citation_for_view=V6JxtrUAAAAJ:B3FOqHPlNUQC

  Abstract Availability of nutritionally balanced commercial feeds is essential in producing healthy, high-quality aquatic animals. Protein is the most important component of aquaculture feeds. Fish require not only a minimum level of protein but also that the essential amino acids are balanced to meet the requirements of each single one. Histidine is an essential amino acid with several functions including protein synthesis, tissue formation and repair as well as maintenance of osmoregulation and myelin sheaths. It also regulates the immune system and acts as antioxidant in fish. Histidine deficiency depresses growth performance and feed utilization. If in excess, it causes disruption of the balance of dietary amino acids leading to toxicity or extensive necrosis in the epithelial cells. Furthermore, histidine serves as an important antioxidant and buffer in various organs of several fish species. In aquaculture, extensive research has been carried out to optimize th

Abstract The anadromous Tenualosa ilish is the most economically important fish in the world and consequently in Iran. The national fish of Iranian contributes about 12% of the total fish production and about 1% of GDP. About 4,500,000 people are directly involved with the catching for livelihood; around four to five million people are indirectly involved with the trade. The present study aimed to estimate 96hLC 50s of silver and selenium on LC 50 of nanoparticle of silver and selenium in different life stages of the fish T. ilish in the environment experimental. The LC 50 for silver in four stages of fish T. ilish were larvae (0.23ppm), fry (0.45ppm), juvenile (0.90ppm) and fingerling (1.45ppm), respectively. There was significance difference between LC 50 levels in four stages of fish species (P<0.05>) and the LC 50 for selenium in four stages of fish T. ilish were larvae (0.89ppm), fry (0.95ppm), juvenile (1.12ppm) and fingerling (1.65ppm), respectively.