This paper reports the metals content in water, sediment, macroalgae, aquatic plant, and fish of Batang Ai Hydroelectric Reservoir in Sarawak, Malaysia. The samples were acid digested and subjected to atomic absorption spectrometry analysis for Na, K, Mn, Cr, Ni, Zn, Mg, Fe, Sn, Al, Ca, As, Se, and Hg. The total Hg content was analysed on the mercury analyser. Results showed that metals in wate...

Small-scale fishers possess a vast amount of local ecological knowledge (LEK) about the fish and fisheries of the Mekong River and tributaries in southern Laos. Between 1993 and 1999, a community-based co-management programme was implemented for the conservation and sustainable management of living aquatic resources in the Siphandone (4000 islands) Wetlands area of the Mekong River in Khong Dis...

The officially permitted export of aquaculture products from Bosnia and Herzegovina (BiH) to the demanding European Union (EU) market is the most important success of Bosnian and Herzegovinian agriculture in the post-war period. However, this breakthrough demands ongoing activities by all Bosnian competent authorities (CAs) and other stakeholders involved in aquaculture aimed toward sustainable...

The biotic and abiotic: processes involved in the environmental degradation of freshwater ecosystems are often complex, and their combined effects are not easily measured. Many human activities across the landscape contribute to degradation, including discharge of domestic, agricultural, and industrial effluents; cultural eutrophication; acidification; erosion and sedimentation following human ...

Heavy metals are introduced into aquatic ecosystems from industrial wastes, agricultural runoff and mining activities. The toxicity of heavy metal ions in solution to microalgae is well known. The essentiality and toxicity of heavy metals has been a subject of extensive research (Stokes 1983). From a biological point of view, heavy metals can be divided into two categories: essential and non-es...

Microbiological contamination is an important water-quality problem worldwide. Human impact on this category of contamination is significant and several human-related activities, and also the population explosion, have affected and are still affecting dramatically the aquatic environment. Extensive industrialization and agriculture have led to increased pollution and hydromorphological changes ...