The objectives to study the effect of Biodiversity of Phytoplankton on the productivity in Polyculture Milkfish and White shrimp vanname Pond Culture waters, Kandang Panjang Pekalongan Region, Centre of Java. Methodology The sampling have tried station T1,T2,T3,T4 were in pond culture of polyculture waters to identify a phyto planton in polyculture pond Kandang Panjang waters. The sampling was carryout between Pebruary to Mei 2018. The result study showed that the value of the diversity indices in T1 treatment obtained the value of diversity indices (H’ = 1.093), T2 obtained diversity values (H’ = 1,072), T3 found (H’ = 1,804) and T4 showed (H’ = 1,907). The similliarity indexs are T1 (values, E = 0.765), values (E = 0.606), T3 ((E = 0.785) and T4 (E = 0.895).The dominance indices values phyto plankton showed T1 (value D = 0.725), T2 (D = 0.606,), T3(D = 00.595) and T4 (D = 00.578).The diversity indices showed higher vlues at T4 showed variety of diversity indices (H’ = 1,907).sampling site as compared to other three (T1,T2, and T3).During experiment showed the water quality of pond culture polyculture milkfish and white shrimp vanname was in viable condition.
Seahorses are acknowledged as commodity due to the ornamental and the medical functions. The data of seahorses, particularly in Maluku Utara, has been undetermined yet. The study explores the habitat characteristcs and density of spotted seahorses Hippocampus kuda at waters of Ternate Island and surroundings. The study was held on January and December 2017 that located at waters of Ternate Island and surroundings. Purposive sampling method was implemented to determine the site of stations. The data were collected by applying the method of sampling quadrate (size of 10m x 10m). The characteristics of habitat of seahorse and the density of seahorse were described. The result illuminated that the seahorses were merely discovered at Station 1 and 2 (at south of Ternate Island). The highest density was found on April for the juveniles (3.3 ind/100 m2), as the broodstocks were on October (2.8 ind/100 m2). The presence of juveniles was noted high at Station 1 (75.81%) and none was found at Station 2. The broodstocks’ occurence was extremely high at Station 2 (male 46.77% and female 53.33%), whereas they were presented 24.20% at the Station 1 (male 14.52% and female 9.68%). The water quality at the site the seahorses were occured were temperature 29.1-29.2°C, transparency 1.5-1.7 m, salinity 25.3-25.5 ppt, pH 7.7-7.8, and DO 5.0-5.3 mg/l. The values were lower than the water quality at the site the seahorses were not found.
Ambon Bay consists of two regions i.e. Inner and Outer Ambon Bay that was separated by Galala-Poka sill. Consequently these waters have different local environmental conditions that leads to the bivalve populations differences, one of them is venus clam Gafrarium tumidum. In this study, the distribution and spatial variation in population characteristics of of venus clam was quantified based on the analysis of their twelve shell dimensions from different populations. Fieldwork and analyses were conducted on April – Juni 2013. Total of 585 individuals of venus clam were found and could be divided into ten size-classes and three size categories i.e. small (< 23.11 mm), medium (23.12–32.05 mm) and large size (> 32.06 mm). The highest size-class density was found at medium size. Spatial distribution was related to the characteristics of sediment and other potential factors. Result of discriminant analysis showed that shell-width (SW) was the variable with the highest discriminating power and distinguishing between Inner and Outer Ambon Bay populations.
This research was conducted in the waters of Muara Gembong, Bekasi, on January to March, 2018. Sampling of blood cockle is carried out in 3 station vertically to the direction of the sea. Determination of station is carried out based on the fishing ground of the fisherman. Analyses of blood cockle is carried out in the Laboratory of the Research Center for Oceanography, LIPI, Ancol – North Jakarta. This research was aimed to analyze the reproductive biological aspects which includes the ratio of gender, the gonad maturity rate, the gonad maturity index, the length-weight relationship, the condition factor of Anadara granosa in the waters of Muara Gembong, Bekasi. The results of observation of 400 samples showed that the length-weight relationship of blood cockle of female and male has the pattern of the negative allometric relationship. The overall ratio of gender between the blood cockle of male and female is 1.3:1. The average value of the gonad maturity index of the male blood cockle is 1.1874 and the value of the gonad maturity index of the female blood cockle is 1.1983. Key words: Anadara granosa, growth, the ratio of gender, gonad maturity index
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.