Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation

Effective and affordable treatment of waste solids is a key sustainability challenge for the aquaculture industry. Here, we investigated the potential for a deposit-feeding sea cucumber, Holothuria scabra, to provide a remediation service whilst concurrently yielding a high-value secondary product i...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	G Robinson, GS Caldwell, CLW Jones, MJ Slater, SM Stead
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/66315c19a4474f23b5f80e9b1455083d
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:66315c19a4474f23b5f80e9b1455083d
record_format	dspace
spelling	oai:doaj.org-article:66315c19a4474f23b5f80e9b1455083d2021-11-04T10:06:15ZRedox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation1869-215X1869-753410.3354/aei00158https://doaj.org/article/66315c19a4474f23b5f80e9b1455083d2015-12-01T00:00:00Zhttps://www.int-res.com/abstracts/aei/v8/n1/p1-13/https://doaj.org/toc/1869-215Xhttps://doaj.org/toc/1869-7534Effective and affordable treatment of waste solids is a key sustainability challenge for the aquaculture industry. Here, we investigated the potential for a deposit-feeding sea cucumber, Holothuria scabra, to provide a remediation service whilst concurrently yielding a high-value secondary product in a land-based recirculating aquaculture system (RAS). The effect of sediment depth, particle size and redox regime were examined in relation to changes in the behaviour, growth and biochemical composition of juvenile sea cucumbers cultured for 81 d in manipulated sediment systems, describing either fully oxic or stratified (oxic-anoxic) redox regimes. The redox regime was the principal factor affecting growth, biochemical composition and behaviour, while substrate depth and particle size did not significantly affect growth rate or biomass production. Animals cultured under fully oxic conditions exhibited negative growth and had higher lipid and carbohydrate contents, potentially due to compensatory feeding in response to higher microphytobenthic production. In contrast, animals in the stratified treatments spent more time feeding, generated faster growth and produced significantly higher biomass yields (626.89 ± 35.44 g m-2 versus 449.22 ± 14.24 g m-2; mean ± SE). Further, unlike in oxic treatments, growth in the stratified treatments did not reach maximum biomass carrying capacity, indicating that stratified sediment is more suitable for culturing sea cucumbers. However, the stratified sediments may exhibit reduced bioremediation ability relative to the oxic sediment, signifying a trade-off between remediation efficiency and exploitable biomass yield.G RobinsonGS CaldwellCLW JonesMJ SlaterSM SteadInter-ResearcharticleAquaculture. Fisheries. AnglingSH1-691EcologyQH540-549.5ENAquaculture Environment Interactions, Vol 8, Iss 1, Pp 1-13 (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 G Robinson GS Caldwell CLW Jones MJ Slater SM Stead Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
description	Effective and affordable treatment of waste solids is a key sustainability challenge for the aquaculture industry. Here, we investigated the potential for a deposit-feeding sea cucumber, Holothuria scabra, to provide a remediation service whilst concurrently yielding a high-value secondary product in a land-based recirculating aquaculture system (RAS). The effect of sediment depth, particle size and redox regime were examined in relation to changes in the behaviour, growth and biochemical composition of juvenile sea cucumbers cultured for 81 d in manipulated sediment systems, describing either fully oxic or stratified (oxic-anoxic) redox regimes. The redox regime was the principal factor affecting growth, biochemical composition and behaviour, while substrate depth and particle size did not significantly affect growth rate or biomass production. Animals cultured under fully oxic conditions exhibited negative growth and had higher lipid and carbohydrate contents, potentially due to compensatory feeding in response to higher microphytobenthic production. In contrast, animals in the stratified treatments spent more time feeding, generated faster growth and produced significantly higher biomass yields (626.89 ± 35.44 g m-2 versus 449.22 ± 14.24 g m-2; mean ± SE). Further, unlike in oxic treatments, growth in the stratified treatments did not reach maximum biomass carrying capacity, indicating that stratified sediment is more suitable for culturing sea cucumbers. However, the stratified sediments may exhibit reduced bioremediation ability relative to the oxic sediment, signifying a trade-off between remediation efficiency and exploitable biomass yield.
format	article
author	G Robinson GS Caldwell CLW Jones MJ Slater SM Stead
author_facet	G Robinson GS Caldwell CLW Jones MJ Slater SM Stead
author_sort	G Robinson
title	Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
title_short	Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
title_full	Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
title_fullStr	Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
title_full_unstemmed	Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
title_sort	redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation
publisher	Inter-Research
publishDate	2015
url	https://doaj.org/article/66315c19a4474f23b5f80e9b1455083d
work_keys_str_mv	AT grobinson redoxstratificationdrivesenhancedgrowthinadepositfeedinginvertebrateimplicationsforaquaculturebioremediation AT gscaldwell redoxstratificationdrivesenhancedgrowthinadepositfeedinginvertebrateimplicationsforaquaculturebioremediation AT clwjones redoxstratificationdrivesenhancedgrowthinadepositfeedinginvertebrateimplicationsforaquaculturebioremediation AT mjslater redoxstratificationdrivesenhancedgrowthinadepositfeedinginvertebrateimplicationsforaquaculturebioremediation AT smstead redoxstratificationdrivesenhancedgrowthinadepositfeedinginvertebrateimplicationsforaquaculturebioremediation
_version_	1718444904309325824

Redox stratification drives enhanced growth in a deposit-feeding invertebrate: implications for aquaculture bioremediation

Ejemplares similares