饲养密度、基质高度和取食频率对杂色羊尾草生长和生物量的影响

Q4 Environmental Science Indonesian Aquaculture Journal Pub Date : 2023-04-21 DOI:10.3390/aquacj3020011
I. Rasines, I. Martín, F. Aguado-Giménez
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引用次数: 0

摘要

多毛鱼(Hediste diversiccolor)是适宜工业化养殖的品种;但要实现其集约化生产,需要开发经济高效的养殖技术。本研究旨在探讨线虫密度与基质高度及其交互作用、取食频率对异色小棉铃虫饲养性能的影响。进行了两项试验。在试验1中,评估了两种基质高度(6 cm和12 cm)和两种饲养密度(1000和4000个体m−2)对线虫生长和生物量的影响。蠕虫初始湿重为48 mg,在70天的试验中,用商业鱼饲料喂养标本。结果表明:饲养密度与基质高度无交互作用,密度是影响生长的关键因素;然而,4000个体m - 2的饲养密度显著提高了产量(最高饲养密度的最终生物量提高了3倍),而不影响存活率。在试验2中,三种饲喂频率水平的效果:一周7天;每周三次;三种体重级别的个体每周增加一次——少量(25-50毫克);中(100-150毫克);大剂量(250-350 mg) -在15天的生长试验中评估。饵料频次对最小鱼种影响最大,饵料频次越高,生长指标越好。本研究表明,在高放养密度的条件下,可以获得较高的生物量,但饲养频率必须作为一个重要因素,并与养殖阶段相适应。
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Effects of Rearing Density, Substrate Height, and Feeding Frequency on Growth and Biomass Production of Hediste diversicolor
The polychaete Hediste diversicolor is a suitable species for industrial aquaculture; however, cost-effective culture techniques need to be developed for its intensive production. The aim of this study is to evaluate the effects of worm density and substrate height and their interaction, as well as feeding frequency, on the rearing performance of H. diversicolor. Two trials were conducted. In trial 1, the effects of two substrate heights—6 and 12 cm—and two rearing densities—1000 and 4000 individuals m−2—were assessed in terms of worm growth and biomass production. Worm initial wet weight was 48 mg, and specimens were fed with commercial fish feed during a 70-day assay. The results show no interaction between rearing density and substrate height, and confirm density as a key factor in growth; however, a density of 4000 individuals m−2 results in a significant increase in production (final biomass three times higher for the highest rearing density) without affecting survival. In trial 2, the effect of three levels of feeding frequency—seven days a week; three times a week; and once a week—on growth in individuals of three weight classes—small (25–50 mg); medium (100–150 mg); large (250–350 mg)—was evaluated in a 15-day growing assay. Feeding frequency showed a major influence on the smallest size class, with the best growth indicators obtained at the highest feeding frequency. This study shows that Hediste diversicolor can be reared at a high stocking density to obtain a higher biomass production, and that feeding frequency must be considered as an important factor and adapted to the culture phase.
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来源期刊
Indonesian Aquaculture Journal
Indonesian Aquaculture Journal Environmental Science-Water Science and Technology
CiteScore
0.50
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发文量
9
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