Juniper Publishers-Oceanography Open Access Journal

  Abstract Jade perch ( Scortum Barcoo ) is a highly nutritious fresh water bass species native in Australia and now being a promising candidate for aquaculture in China. To provide a fundamental biological basis for future germplasm improvement and exploitation of jade perch, biological characteristics of jade perch, including propagation, morphological and genetic characters were analyzed in this study. Jade perch becomes sexually mature at four-year-old. Zygotes of jade perch are transparent, buoyant, and swell upon absorption of water to up to 2.1±0.3mm in diameter. At a water temperature of 27.5±2°C, zygoteshatched 21-26h after fertilization. Comparison of morphological characters between two- and six-month-old jade perch revealed that the proportion of the head with respect to the body decreased significantly (P<0.05), while the proportion of abdominal fat deposits increased significantly (P<0.05). Chromosome number of jade perch is 48, karyo type is 2sm +

  Abstract In recent years, marine organisms have received attention for being a source of natural compounds, enabling the creation of a new and promising field of study. Marine macroalgae are a vast source of raw materials and biologically active molecules used in the pharmaceutical, cosmetic, food and agricultural industries. Due to its importance, the present study aimed to assess whether the bioextract of the red macroalgae Kappaphycus alvarezii acts as a biostimulant in the metabolism of plants and changes the reflectance indexes. In particular, the biological activity of the red macroalgae bioextract was focused on stimulating plant growth and photosynthetic activity. A scientific experiment was carried out using a red marine macroalgae bioextract applied on the pepper culture ( Capsicum annuum L .). The pepper culture was chosen due to its high sensitivity to stress, generating good responses in the evaluation of the biostimulant and anti-stress capacity of an al