Researchers detect that the turbidity of the Guadalquivir enhances the production of anchovies in the estuary

Published 2020년 9월 16일

Tridge summary

A research study conducted by a team of scientists from the University of Seville and the University of Cádiz has discovered that the Guadalquivir estuary has environmental conditions that are favorable for anchovy breeding, leading to four times more productivity compared to the Guadiana estuary. The factors contributing to this productivity include high water turbidity, organic matter in suspension, and a specific salinity gradient. The study also found that the Guadalquivir's unusual turbidity, which is higher than most European rivers due to agricultural practices, plays a crucial role in increasing food availability and enhancing breeding areas for various fish species. The research involves comprehensive analysis of environmental and biological factors in the four main estuaries of the Gulf of Cádiz over a five-year period, providing crucial insights for fishery management and adaptations to climate change.

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Original content

A team of researchers from the University of Seville, in collaboration with the University of Cádiz, has detected that the turbidity of the water, the amount of organic matter in suspension and the salinity gradient favors the breeding of anchovies in the Guadalquivir estuary. These conclusions are derived from a study that has compared the environmental conditions and the early life stages of fish in the four main estuaries of the Gulf of Cádiz (Bahía de Cádiz, Guadalquivir, Odiel-Tinto and Guadiana). The uniqueness of the Guadalquivir is such that its anchovy productivity is four times higher than that of the Guadiana. "High turbidity causes a greater availability of food in the trophic chain, increasing its high productivity and, therefore, its capacity as a breeding area for many species," the researcher at the University's Marine Biology Laboratory tells the Discover Foundation. from Seville Juan Miguel Miró, author of the study 'Environmental factors affecting the nursery ...

Source: Agrodiario Huelva