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中新网珠海7月26日电 题:珠海金湾红旗镇:科技赋能黄立鱼产业升级
中新网记者 张璐
时下,在广东珠海市金湾区红旗镇的养殖鱼塘里,中山大学海洋科学学院(以下简称“海洋科学学院”)师生团队培育的“金湾一号”“金湾二号”黄立鱼成群游弋。红旗镇相关负责人介绍:“经过15个月的人工喂养,这些鱼平均体重已超半斤,生长速度比传统养殖快了近30%。”
金湾区地处珠江入海口咸淡水交汇处,气候温和湿润,水质盐度适宜,是中国优质鱼类黄立鱼的核心养殖区,产量约占全国总产量的20%,素有“中国黄立鱼之乡”的美誉。黄立鱼以肉质鲜美著称,产品远销海内外,但产业发展仍面临养殖周期长、种苗繁育技术瓶颈及种质退化等亟待突破的难题。
海洋科学学院于2021年组织师生团队在珠海市金湾区红旗镇开展科技支农实践活动,后参加广东青年大学生“百千万工程”突击队行动,在此基础上组建了“‘兴’有渔力”实践团(以下简称“实践团”),连续多年扎根珠海市金湾区红旗镇渔业生产一线,通过产学研协同机制推动技术落地与成果转化,向养殖户推广优质黄立鱼苗种及标准化养殖技术,助力金湾黄立鱼产业转型升级。

“金湾黄立鱼的传统养殖周期在一年半左右,时间成本、风险成本相对较高。培育‘金湾一号’鱼苗可缩短养殖周期。”实践团负责人卢建国教授介绍,通过基因组选育的“金湾一号”使金湾黄立鱼出肉率高、营养丰富,从而显著提升其品质。
针对金湾黄立鱼抗病性差的问题,卢建国教授带领团队通过基因编辑技术,历经5代亲本自然受精筛选,成功培育出抗病性强的“金湾二号”品系。数据显示,该品系能有效抵御常见细菌性疾病,良种率达95%,存活率达87%,通过降低病害损失,大幅提升了养殖效率。

今年暑假是实践团第四年来到金湾区红旗镇,实践团成员们深入乡村鱼塘,顶着烈日穿梭于采样点间,记录黄立鱼的生长阶段数据,为养殖户提供病害防治指导和风险评估。实践团成员闪鼎昊说:“现在通过水下图像识别技术能够识别畸形鱼,我们下一步将探索水流、声波等物理参数来监测鱼类健康,让养殖更科学。”
实践团在参加广东青年大学生“百千万工程”突击队行动时,还探索“鱼虾混养”新模式。实践团成员赖允杰介绍,黄立鱼生活在水体中上层,虾则栖息在水体底层,混养既能高效利用空间,又能减少病菌滋生。采用“鱼虾混养”模式,养殖户年均增收可达3万元至5万元(人民币,下同)。赖允杰说:“黄立鱼嘴小,把虾苗养到5厘米至6厘米再投塘,就能避免被吃掉。”
据了解,金湾区目前黄立鱼养殖面积约3万亩,产值超6亿元,已成为全国最大的黄立鱼连片标准化养殖基地。实践团表示,将持续深化“育繁推一体化”发展路径,助力金湾黄立鱼产业提升核心竞争力,促进国家种业振兴与乡村振兴。(完)
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