Along the coastline of Raoping County in Chaozhou, rows of fish breeding ponds shimmer in the sunlight, with young spotted sea bass swimming through the water. During a recent visit to Chaozhou, reporters learned that despite Guangdong's large-scale spotted sea bass farming industry, the province had long lacked a large-scale breeding facility for high-quality sea bass fry. Raoping has now filled this gap in the province's aquaculture industry.

Spotted sea bass is one of Guangdong's leading marine aquaculture species, yet the province has long struggled with a shortage of locally produced fry. Zhao Chao, an Associate Researcher at the South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences (SCSFRI, CAFS) and deputy general manager for technology at Raoping Wanjia Aquiculture Production Co., Ltd., explained the challenge: "In the past, we couldn't produce fertilized spotted sea bass eggs in Guangdong until December or even January. By then, competitors had already captured the market." Compounding the problem was the absence of large-scale breeding facilities for high-quality spotted sea bass fry in the province, leaving farmers facing high costs, significant risks and inconsistent fish quality.

A turning point for the industry's commercial development came in Raoping, where local authorities made breakthroughs in seed breeding a priority, regarding high-quality fry as the "chips" powering marine ranching. Since the Wanjia Provincial-level Spotted Sea Bass Breeding Farm, built with a total investment of 80 million yuan, began operations, it has produced more than 130 million spotted sea bass fry, ending the province's long-standing lack of access to locally produced fry on a commercial scale.

Closer collaboration among industries, universities and research institutions is transforming spotted sea bass breeding. Wanjia Aquiculture Production and the SCSFRI, CAFS jointly established a provincial collaborative innovation center for marine engineering technology, achieving breakthroughs in key techniques such as conservation of original breeding stocks and broodstock cultivation. These advances have boosted the local supply of spotted sea bass fry by 55%. Supported by a provincial doctoral research workstation, the team applied genomic selection breeding technology to develop a new spotted sea bass strain, "Nanrao No. 1", which grows 18.2% faster and has a 21.6% higher survival rate. The team also successfully developed a genomic breeding chip named "Sea Bass No. 1".

Another notable breakthrough has been the ability to bring forward the breeding season. According to Zhao, the team developed an innovative gradient cooling technique to regulate water temperatures, advancing the spawning season of spotted sea bass broodstock by one month."Previously, we had to wait until December or later. Now we can produce eggs and raise fry as early as the beginning of October, giving us a head start in the market," he said. The breeding ponds are now also being used more efficiently to raise fry of other species, including black scrapers and groupers, increasing resource utilization by 50%.

潮州饶平花鲈：以“芯”动能破浪前行 | 蓝色粮仓 粤海优品

在潮州饶平绵延的海岸线上，一口口育苗池波光粼粼。池中，花鲈鱼苗正欢快地游弋。记者近日在潮州采访了解到，广东花鲈养殖规模庞大，过去省内却没有成规模的花鲈良种场，如今潮州饶平填补了省内花鲈种苗培育的空白。

花鲈是广东海水养殖的当家品种，却长期面临“省内无苗”的尴尬。南海水产研究所副研究员、饶平县万佳水产有限公司科技副总经理赵超给记者算了一笔账：“过去在广东做这条鱼，产受精卵要等到12月以后甚至下一年1月，那时候市场已经被别人占领了。”更棘手的是，省内没有成规模的花鲈良种场，养殖户养殖花鲈的成本高、风险大、品质参差不齐。

产业化的转机出现在饶平。当地将种苗作为海洋牧场的“芯片”全力攻坚。总投资8000万元的万佳省级花鲈良种场竣工投产后，累计产出花鲈鱼苗超1.3亿尾，彻底结束省内购买不到规模化花鲈种苗的局面。

产学研深度融合正在重塑花鲈种业。万佳水产与南海水产研究所组建省级海洋工程技术协同创新中心，突破花鲈原种保存、亲本培育等关键技术，本地花鲈苗供应激增55%。依托省级博士工作站，团队应用全基因组选择育种技术，成功研发花鲈新品系“南饶1号”——生长速度提升18.2%，成活率提高21.6%，并成功培育出育种芯片“海鲈1号”。

更令人称道的是“时间差”的突破。赵超介绍，团队创新研发梯度制冷技术调控水温，使花鲈亲本产卵期提前一个月。“过去要等到12月以后，现在10月初就可以产卵做苗，抢占了市场先机。”如今，育苗池资源高效复用，养殖马面鲀、石斑等鱼苗，资源利用率提升50%。

文、图 | 记者 曾柯权 通讯员 饶宣
翻译丨曾敏
审校丨肖凯欣