AbstrakJaringan lambung yang diamati berasal dari kijing (Anodonta woodiana) yang terdedah pestisida Diazinon 60 EC selama 2 minggu dengan pemberian dosis yang berbeda, yaitu 3,5x10 -6 ; 1,75x10 -6 ; 0,875x10 -6 dan 0 ppm. Kondisi kijing diamati sebelum pemberian pestisida dan setelah 1 minggu dan 2 minggu pendedahan. Irisan lambung dibuat dari sampel 1 dan 2 minggu pendedahan menggunakan pewarnaan HE. Analisis histologi lambung kijing menunjukkan bahwa dinding lambung setelah terdedah pestisida akan mengalami kerusakan berupa penebalan dinding (edema), dengan jarak digestive divericula saling berjauhan, silia dalam lambung terlihat menyatu (fusi) dan terjadi pembengkakan silia (hyperplasia). Bahkan setelah pendedahan pestisida selama 2 minggu, dinding lambung makin menebal serta digestive diverticula mengalami pengerutan (atropi) dan pemecahan atau kerusakan sel (nekrosis). AbstractStomach tissue of mussel (Anodonta woodiana) was observed. It was exposured by pesticide Diazinon 60 EC for 2 weeks by different doses: 3,5 x 10 -6 ; 1,75 x 10 -6 ; 0,875 x 10 -6 and 0 ppm. Observed tissues are the first condition of mussel or before pestiside, 1 week and 2 weeks of exposure. Stomach slice was made from before, 1 week and 2 weeks exposure by HE colouration. Histology analysis of mussel's stomach show that wall of stomach after pesticide exposure get damages as wall thickening (edema), with apart digestive diverticula distance, silia fusion and swelling (hyperplasia). Even, after for 2 week pesticide exposure, the stomach wall becoming thicker and digestive diverticula also srink (atropy) and necrosis.

Lead is one of the heavy metals of pollutant sources that are highly toxic and can not be degraded thus accumulating in sediments and aquatic organisms including Tubifex worms. The objectives of the study were to determine the concentration and to analyze the correlation of lead concentration (Pb) contained in water, sediments and Tubifex worms. The research method used is survey. Samples were taken at the waters of the landfill. The determination of lead concentration (Pb) was used by Atomic Absorption Spectrophotometer (AAS) method. The results of measurements of lead concentration (Pb) in water, sediments and Tubifex worms tabulated in tables and graphs, were analyzed descriptively. To prove that the increase of Pb concentration in Tubifex worms along with the increase of Pb content in water and sediment, a simple linear regression analysis was performed. The results showed the concentration of Pb in water (0.4923 ± 0.0091 mg / L - 0.6647 ± 0.0067 mg / L), in sediments (1.3803 ± 0.0042 mg / L - 1.4530 ± 0 , 0046 mg / L) and in Tubifex worms (0.9213 ± 0.0032 mg / L - 0.9767 ± 0.0060 mg / L). The concentration of Pb in the Tubifex worm has increased with increasing concentrations of Pb in water and sediment.

ABSTRACT

The study aims to understand the pH analysis path model in white shrimp-intensive ponds. The method used is the ex-post-facto analytical analysis by observing changes in the pH of pond water and other water quality parameter factors that affect it—shrimp farming method under the intensively patterned BAPC. The measured water parameters were pH, temperature, salinity, transparency, TOM, carbonate, bicarbonate, and total alkalinity. The collected research data were analyzed by regression and correlation to create a path analysis model for pH. The results showed that changes in the pH of pond water are influenced directly and indirectly by salinity, TOM, and total alkalinity. The most significant direct influence comes from the total alkalinity and the smallest of TOM.