Supplementation of biofloc in carp (Cyprinus carpio var. Communis) culture as a potential tool of resource management in aquaculture

IF 1.5 4区农林科学 Q3 FISHERIES Aquatic Living Resources Pub Date : 2021-01-01 DOI:10.1051/alr/2021019

S. Das, A. Mandal

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引用次数: 5

Abstract

Supplementation of biofloc in rearing of common carp (Cyprinus carpio var. Communis (0.84 ± 0.003 g) was tested in replacing costly feed and environmental amelioration. Neem (Azadirachta indica) leave extract in biofloc media has beenknown to be beneficial in controlling pathogenic Vibrio sp. in brackish water shrimp. Two studies were conducted for 120 days in outdoor experimental cisterns with reduction of feed from 50% to 100%, with two biofloc media; without (Experiment 1; E1) and with neem extract (Experiment 2; E2). The experimental groups were: biofloc with feeding at 6% body weight (T1E1 and T1E2), biofloc with feeding at 3% body weight (T2E1 and T2E2), biofloc without feeding (T3E1 and T3E2), feeding at 6% body weight (C1) and only biofloc (C2E1 and C2E2). Absolute weight gain in T2E1 (9.96 g) was 8.23% and in T2E2 (9.56 g) was 4.39% higher than C1 (9.14). In spite of 5.04% and 13.98% higher growth respectively in T1E1 (10.50 g) and T1E2 (11.66 g) than C1 (9.97 g), BFT could not compensate the total withdrawal of feed (T3E1 and T3E2) and resulted in 22.22% to 33.33% mortality in T3E2 and T3E1 respectively. Under identical feeding regime, FCR was improved by 52.57% to 53.76% in T2E1 (1.84) and 48.71% to 51.23% in T2E2 (1.99) compared to T1E1 (3.98) and T1E2 (4.08). Absolute weight gain in T2E1 was 8.97 times and in T2E2 was 4.63 times higher than C1. In spite of 18.54% and 7.26% higher growth respectively in T1E1 and T1E2 than C1, BFT could not compensate the total withdrawal of feed (T3E1 and T3E2) and resulted in 22.22% to 33.33% mortality in T3E2 and T3E1 respectively. Under identical feeding regime, FCR was improved by 52.57% to 53.76% in T2E1 and 48.71% to 51.23% in T2E2 compared to T1E1 and T1E2 respectively. Increased N: P ratio of water and soil in E2 favoured fish growth. Neem leave extract in biofloc media should be judicious as it may cause nitrification inhibition.

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在鲤鱼(Cyprinus carpio var. Communis)养殖中添加生物絮团作为水产养殖资源管理的潜在工具

研究了在鲤鱼养殖中添加生物絮团(0.84±0.003 g)替代昂贵饲料和改善环境的效果。生物絮团培养基中的印楝叶提取物对控制咸淡水虾的致病性弧菌有益。两项研究在室外实验池中进行，饲料减少50%至100%，使用两种生物絮团培养基，为期120天;(实验1;E1)和印楝提取物(实验2;E2)。试验组分别为:6%体重饲喂的生物絮团(T1E1和T1E2)、3%体重饲喂的生物絮团(T2E1和T2E2)、不饲喂的生物絮团(T3E1和T3E2)、6%体重饲喂的生物絮团(C1)和仅饲喂的生物絮团(C2E1和C2E2)。T2E1组的绝对增重(9.96 g)比C1组(9.14 g)高8.23%，T2E2组(9.56 g)高4.39%。尽管T1E1 (10.50 g)和T1E2 (11.66 g)的生长量分别比C1 (9.97 g)高5.04%和13.98%，但BFT不能补偿T3E1和T3E2的全采食量，导致T3E2和T3E1的死亡率分别为22.22% ~ 33.33%。在相同饲喂方式下，T2E1组的饲料转化率(FCR)比T1E1组(3.98)和T1E2组(4.08)分别提高52.57% ~ 53.76%(1.84)和48.71% ~ 51.23%(1.99)。T2E1组的绝对体重增加是C1组的8.97倍，T2E2组的绝对体重增加是C1组的4.63倍。尽管T1E1和T1E2的生长量分别比C1高18.54%和7.26%，但BFT不能补偿T3E1和T3E2的全采食量，导致T3E2和T3E1的死亡率分别为22.22% ~ 33.33%。在相同饲喂方式下，T2E1和T2E2的饲料转化率分别比T1E1和T1E2提高52.57% ~ 53.76%和48.71% ~ 51.23%。E2土壤氮磷比的提高有利于鱼的生长。印楝叶提取物在生物絮团培养基中应该是明智的，因为它可能会导致硝化抑制。

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来源期刊

Aquatic Living Resources 农林科学-海洋与淡水生物学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>24 weeks

期刊介绍： Aquatic Living Resources publishes original research papers, review articles and propective notes dealing with all exploited (i.e. fished or farmed) living resources in marine, brackish and freshwater environments. Priority is given to ecosystem-based approaches to the study of fishery and aquaculture social-ecological systems, including biological, ecological, economic and social dimensions. Research on the development of interdisciplinary methods and tools which can usefully support the design, implementation and evaluation of alternative management strategies for fisheries and/or aquaculture systems at different scales is particularly welcome by the journal. This includes the exploration of scenarios and strategies for the conservation of aquatic biodiversity and research relating to the development of integrated assessment approaches aimed at ensuring sustainable and high quality uses of aquatic living resources.