Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli

Feeding ratio and frequency have substantial effects on food digestion and assimilation in fish, yet few attempts have been made to determine their influences on the bioaccumulation of trace metals. In this study, juvenile Acanthopagrus schlegeli were exposed to either waterborne or dietary cadmium...

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Autores principales:	Z Guo, W Zhang, Y Zhou, N Gao, L Zhang
Formato:	article
Lenguaje:	EN
Publicado:	Inter-Research 2015
Materias:	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/f7853338122b42158da491617f71d1ec
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spelling	oai:doaj.org-article:f7853338122b42158da491617f71d1ec2021-11-16T09:43:01ZFeeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli1869-215X1869-753410.3354/aei00140https://doaj.org/article/f7853338122b42158da491617f71d1ec2015-09-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v7/n2/p135-145/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Feeding ratio and frequency have substantial effects on food digestion and assimilation in fish, yet few attempts have been made to determine their influences on the bioaccumulation of trace metals. In this study, juvenile Acanthopagrus schlegeli were exposed to either waterborne or dietary cadmium (Cd) at different feeding ratios (0, 2, or 4% body weight d-1 [BW d-1] under waterborne Cd exposure and 1, 2.5, or 4% BW d-1 under dietary Cd exposure) or feeding frequencies (1, 2 or 8 times d-1) for 5 wk. Under waterborne Cd exposure, the fish fed 0% BW d-1 or 8 times d-1 showed significantly lower growth rates and those fed 0% BW d-1 or 1 time d-1 exhibited higher Cd body burdens and Cd uptake rates compared to the other groups. The gut showed a significantly higher waterborne Cd uptake rate than the gills when fish were fasted or fed only 1 time d-1. These results suggest that starvation and low feeding frequency facilitate waterborne Cd uptake. Under dietary Cd exposure, the fish fed 4% BW d-1 or 2 times d-1 grew faster. Cd body burden and Cd assimilation were higher in fish fed 2.5% BW d-1 or 2 times d-1. Dietary Cd retention was positively correlated with feed efficiency, suggesting the utilization of Cd probably coincides with the essential nutrients in fish. Overall, this study demonstrates that different feeding strategies significantly influence waterborne and dietary Cd bioaccumulation in marine fish. Therefore, feeding conditions have to be considered carefully for managing trace metal contamination in marine fish farming.Z GuoW ZhangY ZhouN GaoL ZhangInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 7, Iss 2, Pp 135-145 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5
spellingShingle	Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 Z Guo W Zhang Y Zhou N Gao L Zhang Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
description	Feeding ratio and frequency have substantial effects on food digestion and assimilation in fish, yet few attempts have been made to determine their influences on the bioaccumulation of trace metals. In this study, juvenile Acanthopagrus schlegeli were exposed to either waterborne or dietary cadmium (Cd) at different feeding ratios (0, 2, or 4% body weight d-1 [BW d-1] under waterborne Cd exposure and 1, 2.5, or 4% BW d-1 under dietary Cd exposure) or feeding frequencies (1, 2 or 8 times d-1) for 5 wk. Under waterborne Cd exposure, the fish fed 0% BW d-1 or 8 times d-1 showed significantly lower growth rates and those fed 0% BW d-1 or 1 time d-1 exhibited higher Cd body burdens and Cd uptake rates compared to the other groups. The gut showed a significantly higher waterborne Cd uptake rate than the gills when fish were fasted or fed only 1 time d-1. These results suggest that starvation and low feeding frequency facilitate waterborne Cd uptake. Under dietary Cd exposure, the fish fed 4% BW d-1 or 2 times d-1 grew faster. Cd body burden and Cd assimilation were higher in fish fed 2.5% BW d-1 or 2 times d-1. Dietary Cd retention was positively correlated with feed efficiency, suggesting the utilization of Cd probably coincides with the essential nutrients in fish. Overall, this study demonstrates that different feeding strategies significantly influence waterborne and dietary Cd bioaccumulation in marine fish. Therefore, feeding conditions have to be considered carefully for managing trace metal contamination in marine fish farming.
format	article
author	Z Guo W Zhang Y Zhou N Gao L Zhang
author_facet	Z Guo W Zhang Y Zhou N Gao L Zhang
author_sort	Z Guo
title	Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
title_short	Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
title_full	Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
title_fullStr	Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
title_full_unstemmed	Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
title_sort	feeding ratio and frequency affects cadmium bioaccumulation in black sea bream acanthopagrus schlegeli
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/f7853338122b42158da491617f71d1ec
work_keys_str_mv	AT zguo feedingratioandfrequencyaffectscadmiumbioaccumulationinblackseabreamacanthopagrusschlegeli AT wzhang feedingratioandfrequencyaffectscadmiumbioaccumulationinblackseabreamacanthopagrusschlegeli AT yzhou feedingratioandfrequencyaffectscadmiumbioaccumulationinblackseabreamacanthopagrusschlegeli AT ngao feedingratioandfrequencyaffectscadmiumbioaccumulationinblackseabreamacanthopagrusschlegeli AT lzhang feedingratioandfrequencyaffectscadmiumbioaccumulationinblackseabreamacanthopagrusschlegeli
_version_	1718426643072024576

Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli

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