Variation of water quality parameters and correlation with catch per unit effort of oriental river prawn (Macrobrachium nipponense) in Anzali Lagoon, Iran

Abstract

The Anzali Lagoon is located on the southern coast of the Caspian Sea in the Guilan province. Nineteen rivers enter the Anzali lagoon, connected to the Caspian Sea (Aminisarteshnizi, 2021). These rivers pass through forests, urban and rural areas, and because of that, the rivers carry a variety of organic, mineral, sedimentary materials, domestic, industrial, and agricultural effluents. Water quality has drastically deteriorated due to the constant industrial, agricultural, and domestic waste disposal in the rivers; the rivers affect Anzali lagoon ecosystems (Fallah & Zamani-Ahmadmahmoodi, 2017). Anzali lagoon is vital for the spawning and nursery of fish and aquatic species. Oriental river prawn (M. nipponense) is natively distributed in the west of Asia, while the population of M. nipponense in the Anzali lagoon was recorded in 2006 (De Grave & Ghane, 2006) and later on spread in northern Iran's water basins