Group 1 - The Chinese sturgeon is a flagship species of the Yangtze River and is considered a rare and ancient fish, known as the "treasure of water China" [1] - The population of wild Chinese sturgeons has been declining, with no natural breeding activity observed for eight consecutive years, leading to an emphasis on artificial breeding and release as a key conservation strategy [1] - In 2024, the release scale of Chinese sturgeons is expected to exceed 1 million, with approximately 110,000 juvenile fish already entering the ocean through the Yangtze River estuary [1] Group 2 - On June 6, "National Fish Release Day," 24 cities including Wuhan, Chongqing, and Changsha conducted simultaneous "scientific release" activities, releasing 500,000 rare and endangered fish, including Chinese sturgeons [2] - Prior to release, Chinese sturgeons are kept in temporary holding pools to adapt to the Yangtze River's water environment, and they are equipped with ultrasonic monitoring devices that do not harm them [2] - Monitoring data from 2024 indicates that 50% of released sturgeons aged five and above reached the Yangtze River estuary, demonstrating the effectiveness of the release program in supplementing wild populations [2] Group 3 - To accurately assess the adaptation of released Chinese sturgeons, ultrasonic receiving devices were installed to monitor their distribution and migration patterns in the Yangtze River [3] - The core objective of the newly installed devices is to track the arrival time of marked sturgeons at the Yangtze River estuary and evaluate their survival adaptability and release effectiveness [3] - A total of 49 high-precision ultrasonic receiving devices have been installed along the Yangtze River to cover the entire migration path of the Chinese sturgeon [3]

Core Viewpoint - The article emphasizes the importance of fish stocking as an effective method for restoring fish populations, enhancing biodiversity, and stabilizing ecosystems, particularly focusing on the Qinghai Lake naked carp [1][2] Group 1: Fish Stocking and Conservation Efforts - The contribution rate of fish stocking to the recovery of Qinghai Lake naked carp resources is assessed at 26% [1] - Qinghai Province has implemented six lake closures for fish breeding, a first in China's fish resource conservation history [2] - The scale of fish stocking has increased from 3 million fish in 2002 to 20 million fish currently, with the weight of each fish increasing from 5 grams to 10 grams [2] Group 2: Current Status of Qinghai Lake Naked Carp - As of the end of 2023, the resource stock of Qinghai Lake naked carp reached 120,300 tons, transitioning from "endangered" to "vulnerable" status [2] - The total stock of Qinghai Lake naked carp has grown nearly 49 times since the initial protection efforts, now totaling 127,500 tons [2] - Over 210 million juvenile naked carp have been released in Gangcha County, contributing to the ecological balance of the region [2]

Core Insights - Dalian City is actively promoting marine fishery enhancement through the release of fish seedlings, aiming to empower both marine ecology and the fishery economy [1][2] - The initiative includes the release of various fish species, ensuring local adaptability and quality through the use of native breeding stock [1] - The program has shown significant economic benefits, with a reported input-output ratio of approximately 1:11 since the 14th Five-Year Plan, indicating a successful return on investment [2] Group 1 - The event on June 6th highlighted the importance of fishery enhancement for ecological restoration and resource conservation [1] - Species released include brown sole, Pseudoblennius cottoides, and greenfin puffer, all bred locally to ensure quality [1] - The initiative supports biodiversity and provides a stable source of seafood for local communities, enhancing both ecological and economic outcomes [1] Group 2 - Local fishermen, particularly in Chenjiacun, have reported tangible benefits from the fishery enhancement program, with significant increases in daily catch volumes [2] - The catch of brown sole has increased from being rare 20 years ago to a common item on local tables, reflecting improved fishery health [2] - Dalian has established a systematic approach to fishery enhancement, designating May to August as the release period, which has been ongoing for over a decade [2]