循环水养殖系统下藻鱼互作效应及对水质调控的研究  

Algae-fish interactions and wastewater quality control in recirculating aquaculture systems

作　　者：郭优优 谢恩义[1] 辛榕 林坤 廖佳炜 陈春丽 王慧慧 杨文成 崔建军 莫峰 温其交 GUO Youyou;XIE Enyi;XIN Rong;LIN Kun;LIAO Jiawei;CHEN Chunli;WANG Huihui;YANG Wencheng;CUI Jianjun;MO Feng;WEN Qijiao(Fisheries College of Guangdong Ocean University,Zhanjiang 524088,China;Lianjiang Shrimp Farming Group Limited,Zhanjiang 524499,China)

机构地区：[1]广东海洋大学水产学院,广东湛江524088 [2]廉江市养虾集团有限公司,广东湛江524499

出　　处：《热带海洋学报》2025年第2期147-156,共10页Journal of Tropical Oceanography

基　　金：国家重点研发计划项目(2022YFD2401303);技术服务项目(B23315)。

摘　　要：为探讨循环水养殖系统下藻鱼相互作用及混养藻类对水质的净化作用,文章选取一种耐高温藻类——江蓠(Gracilaria spp.)与珍珠龙胆石斑鱼(Epinephelus fuscoguttatus♀×E.lanceolatus♂)混养在循环水养殖系统中,研究添加江蓠后,循环系统中的水质变化及藻鱼的生长情况。结果显示:循环水系统添加江蓠起到了明显的水质净化效果并促进了石斑鱼的生长。添加江蓠的试验组养殖桶中水体氨氮、亚硝酸氮和活性磷酸盐浓度比对照组分别降低了5.05%、98.81%和69.26%。相对于对照组,试验组石斑鱼的增重率、存活率分别为67.37%、96.43%,是对照组的2.10倍、1.69倍。在养殖期间,试验组江蓠特定生长率均达3%·d^(-1)以上,增重量达1.5倍以上。同时,通过格兰杰因果检验,循环水养殖模式既能促进藻鱼互利共生,又可有效净化水质。This study investigated the impacts of algae-fish interactions on wastewater purification in a recirculating aquaculture system,with and without the high-temperature resistant Gracilaria spp.as the experimental alga.The effects of Gracilaria spp.on the quality of the system wastewater and the growth performance of the hybrid pearl gentian groupers(Epinephelus fuscoguttatus♀ × E.lanceolatus♂)were examined.The results showed that the presence of Gracilaria spp..1) improved wastewater quality and reduced the concentrations of ammonia nitrogen,nitrite,and phosphate in the wastewater in the grouper culture bucket by 5.05%,98.81%,and 69.26%,respectively,compared with the control group without Gracilaria spp.,and 2) promoted the growth performance of the groupers,with their weight gain rate and survival rate in the experimental group increasing by 2.10-and 1.69-fold(to 67.37% and 96.43%),respectively,compared with the control group.In addition,the Gracilaria spp.grew rapidly in the experimental treatment.Their specific growth rate was more than 3%·d^(-1) and their wet weight was more than 1.5 times as much during the culture experiments.We also conducted a Granger causality test.Our results confirmed that the addition of Gracilaria spp.to a recirculating aquaculture system should reduce the ammonia nitrogen concentration and increase the biomass and survival rate of the groupers.The study showed that a recirculating aquaculture system not only enhanced the mutualistic relationship between algae and fish but also efficiently improved water quality,potentially leading to further development and application of multi-level integrated aquaculture models.

关 键 词：江蓠 珍珠龙胆石斑鱼 循环水养殖系统 互作效应 水质调控 

分 类 号：P735.124[天文地球—海洋生物学]