Open AccessStudy on Determination Method of Target Fishes for Ecological Flow in the main Stream of Huaihe River
Author(s) -
Ruqiang Zhang,
Li Wang,
Yang Jy,
Guanbin Xu,
Wei Yang
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1637/1/012073
Subject(s) - perciformes , river ecosystem , selection (genetic algorithm) , fishery , cypriniformes , ecology , streams , range (aeronautics) , habitat , drainage basin , freshwater ecosystem , ichthyology , fish <actinopterygii> , analytic hierarchy process , environmental science , ecosystem , geography , biology , computer science , operations research , cyprinidae , mathematics , cartography , computer network , materials science , artificial intelligence , composite material
Reasonable ecological flow based on biological indicator is crucial for river ecosystem health and restoration. Selection of biological indicator, often being the target fishes, is of great importance. Differentiating from the traditional way of choosing the rare or economic fishes as the target fishes, a more objective approach was applied in this study. Firstly, the field investigation was conducted to determine the alternative fishes range. Then, the Analytic Hierarchy Process (AHP) was employed to construct the judgment matrixes, aiming at obtaining the order weight values of the selected fishes and screening for the target fishes. This step made sure that the target fishes were representative for habitat requirement for Huaihe River. Based on fish resources data, 20 alternative fishes were selected, including 12 Cypriniformes, 3 Siluriformes, 4 Perciformes, and 1 Clupeiformes species. The results of the order weight values of the judgmental matrix showed that Parabramis pekinensis might be taken as an target fishes for calculating ecological flow because it could represent hydrological requirement for aquatic biology in the main stream of Huaihe River. This study provided a promising method for target species selection in the rivers where rare and endemic species are unavailable.