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Along with the advance of 3C technology and the promotion of education reform, multimedia video information equipment is largely combined in the education scene for student-centered course teaching. Including multimedia video in instruction for curriculum design provides students with diverse teaching and learning methods. It is expected to enhance students' learning attitudes and achievements through vivid and active multimedia video situations, as well as guide students' interests and achievements in learning. Taking 188 college students in Guangdong Province as the experimental objects, the 16-week (3 hours per week for a total of 48 hours) multimedia video integrated science, technology, engineering, and mathematics (STEM) experimental teaching research is preceded by this study. The research results show that: (1) students present a positive learning attitude as they expect to understand more of the taught content from multimedia video-integrated STEM curricula; (2) multimedia video-integrated STEM curricula provide students with effective learning; and (3) the use of multimedia video provides more opportunities and information for students to understand STEM-related information. The assistance of multimedia video could enhance their willingness to learn and creativity in STEM curricula. According to the results of proposed discussions and suggestions, it is expected to provide students with diverse learning methods and build students' learning concepts without restricting learning to time and place. [ABSTRACT FROM AUTHOR]

In the last few decades, non-native freshwater fishes have been introduced all over the world for economic purposes, including aquaculture and aquarium trade, as well as improvement for wild stocks resulting in adverse environmental and socio-economic effects. The Guangdong province of China is at a high risk of fish invasions owing to its warm and humid climate, abundance of water courses, flourishing aquaculture and ornamental fish trade, and extensive sea ports. A total of 160 non-native freshwater species were introduced in the Guangdong province and 71.9% of them were imported for aquarium purposes. Fourteen species have established self-sustaining populations and 21 species were found in the main river basin of the Guangdong province. Propagule pressure, rapid evolution and abundant resources in the environment were the factors likely to contribute to successful invasion by non-native fishes. The invasion of non-native fishes in the Guangdong province has already resulted in economic losses, decline of native species, as well as negative impacts on the functional diversity of native fish assemblages. To mitigate these effects and prevent future non-native fish invasions, scientists, policy makers and stakeholders should collaborate on the management of non-native fish introductions by developing risk assessments, statutory regulations, public education and scientific research. [ABSTRACT FROM AUTHOR]