摘要
对土池育苗条件下大弹涂鱼(Boleophthalmuspectinirostris)早期仔鱼的摄食进行了分析。在水温20～32℃,盐度15～20,池水透明度18～25cm的环境中,初孵仔鱼至孵化后4日龄为大弹涂鱼前期仔鱼发育阶段,其中初孵仔鱼至孵化后1日龄属于内源性营养期;从孵化后2日龄至4日龄属于混合营养期。混合营养期仔鱼除依靠吸收卵黄囊和油球为营养以外,还从土池水体中摄食含有拟铃虫的颗粒有机碎屑以及少量的双壳类担轮幼体、面盘幼体和多毛类担轮幼体。孵化后5日龄开始进入后期仔鱼发育阶段,已属于外源性营养期。孵化后5～7日龄仔鱼基本上依靠摄食土池水体中的桡足类无节幼体、桡足幼体和多毛类担轮幼体,但还摄食少量的颗粒有机碎屑。大弹涂鱼仔鱼是碎屑食物链起点的捕食者,虽然有机碎屑并非活饵料,但它附着或包含着拟铃虫、底栖硅藻和细菌等活饵料,是由无生命的碎屑和有生命的生物组成的复合体。
Initial feeding of early larvae Boleophthalrnus pectinirostris in earthen pond rearing was analyzed in this study. Prelarval stage extended from newly hatched larva to 4 days＇ larva after hatching at water temperature 20-32℃, salinity 15-20 and transparence 18-25 cm. Endogenous nutrition stage extended from newly hatched larva to 1 day＇s larva after hatching, while mixed nutrition stage extended from 2 days＇ larva to 4 days＇ larva after hatching. At the mixed nutrition stage larvae lived on nutriment from yolk sac and oil globules, in addition to feeding on particulate organic detritus containing Tintinnopsis spp. , also on few of trochophore and veliger of bivalve and trochophore of Polychaeta in water of the earthen ponds. Larva developed into the postlarval stage starting from 5th day after hatching, which belonged to the exogenous nutrition stage. 5 to 7 days＇ larve after hatching larvae mostly lived on copepod nauplii, copepodites and trochophore of Polychaeta in water of the earthen ponds, apart from feeding on particulate organic detritus. Organic detritus was the start of food chain for larval Boleophthalmus pectinirostris. Although particulate organic detritus is a non-living diet, it was a complex comprised of non-living detritus and living organisms, including Tintinnopsis spp. , benthic diatoms and bacteria.
出处
《海洋水产研究》
CSCD
北大核心
2005年第4期38-44,共7页
Marine Fisheries Research
基金
国家级星火计划项目(2005EA720007)
福建省重大科技项目(2003No26)
福建省科技重大专项(2004SZ0102)资助
关键词
大弹涂鱼
土池育苗
早期仔鱼
开口摄食
Boleophthalmus pectinirostris Earthen pond rearing Early larvae Initial feeding
