Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream

Schizothorax oconnori Lloyd is a local endemic species, one of the most frequently observed species in the Tibet plateau, China, and the representative species of cold-water fish in the Yarlung Zangbo River basin. Knowing the flow velocity preference of fish is essential for understanding the mechan...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yan Liang, Yiqun Hou, Wangbin Hu, David Johnson, Junxing Wang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Schizothorax oconnori Flow velocity preference Non-uniform flow Flow preference variation Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/1f6065855e1c467f99f04addc437da89
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:1f6065855e1c467f99f04addc437da89
record_format	dspace
spelling	oai:doaj.org-article:1f6065855e1c467f99f04addc437da892021-11-06T04:29:56ZFlow velocity preference of Schizothorax oconnori Lloyd swimming upstream2351-989410.1016/j.gecco.2021.e01902https://doaj.org/article/1f6065855e1c467f99f04addc437da892021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2351989421004522https://doaj.org/toc/2351-9894Schizothorax oconnori Lloyd is a local endemic species, one of the most frequently observed species in the Tibet plateau, China, and the representative species of cold-water fish in the Yarlung Zangbo River basin. Knowing the flow velocity preference of fish is essential for understanding the mechanics of their locomotion, and part of the biological foundation required for habitat restoration. The flow velocity preference of Schizothorax oconnori swimming upstream was investigated using a four-channel flume. The flow fields in each channel were nearly uniform, but the flow velocity varied by channel. Test fish swam upstream, of their own volition, into a channel and were recorded by PIT (Passive Integrated Transponder) antennas as they entered the channel. The proportion of fish entering each channel was recorded and changes in activity level during the experiment were analyzed to detect diurnal and nocturnal cycles of activity. The choice among channels made by the test fish differed significantly, indicating that Schizothorax oconnori display a preference for flow velocity. Furthermore, it was demonstrated that the preference for flow velocity varied by season, with a preference for relatively high velocity in late July and a relatively low velocity in late August. This variation in preference may be attributed primarily to different feeding strategies in the two seasons and to differing maximum flow velocities in the two experiments. Due to fatigue, or acclimation to the constant flow field, fish activity decreased significantly after 10 h. Schizothorax oconnori was more active at night than during the day, attributed to its benthic nature and the relatively high light level in the shallow flume. Based on our findings, we make the following recommendations for fish passage design: (1) The flow field should be non-uniform to accommodate a flow preference that varies with season, and which helps prevent fatigue; (2) Avoid excessively long fish passageways and provide a combination of water depth and shading that provides a satisfactory light level.Yan LiangYiqun HouWangbin HuDavid JohnsonJunxing WangElsevierarticleSchizothorax oconnoriFlow velocity preferenceNon-uniform flowFlow preference variationEcologyQH540-549.5ENGlobal Ecology and Conservation, Vol 32, Iss , Pp e01902- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Schizothorax oconnori Flow velocity preference Non-uniform flow Flow preference variation Ecology QH540-549.5
spellingShingle	Schizothorax oconnori Flow velocity preference Non-uniform flow Flow preference variation Ecology QH540-549.5 Yan Liang Yiqun Hou Wangbin Hu David Johnson Junxing Wang Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream
description	Schizothorax oconnori Lloyd is a local endemic species, one of the most frequently observed species in the Tibet plateau, China, and the representative species of cold-water fish in the Yarlung Zangbo River basin. Knowing the flow velocity preference of fish is essential for understanding the mechanics of their locomotion, and part of the biological foundation required for habitat restoration. The flow velocity preference of Schizothorax oconnori swimming upstream was investigated using a four-channel flume. The flow fields in each channel were nearly uniform, but the flow velocity varied by channel. Test fish swam upstream, of their own volition, into a channel and were recorded by PIT (Passive Integrated Transponder) antennas as they entered the channel. The proportion of fish entering each channel was recorded and changes in activity level during the experiment were analyzed to detect diurnal and nocturnal cycles of activity. The choice among channels made by the test fish differed significantly, indicating that Schizothorax oconnori display a preference for flow velocity. Furthermore, it was demonstrated that the preference for flow velocity varied by season, with a preference for relatively high velocity in late July and a relatively low velocity in late August. This variation in preference may be attributed primarily to different feeding strategies in the two seasons and to differing maximum flow velocities in the two experiments. Due to fatigue, or acclimation to the constant flow field, fish activity decreased significantly after 10 h. Schizothorax oconnori was more active at night than during the day, attributed to its benthic nature and the relatively high light level in the shallow flume. Based on our findings, we make the following recommendations for fish passage design: (1) The flow field should be non-uniform to accommodate a flow preference that varies with season, and which helps prevent fatigue; (2) Avoid excessively long fish passageways and provide a combination of water depth and shading that provides a satisfactory light level.
format	article
author	Yan Liang Yiqun Hou Wangbin Hu David Johnson Junxing Wang
author_facet	Yan Liang Yiqun Hou Wangbin Hu David Johnson Junxing Wang
author_sort	Yan Liang
title	Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream
title_short	Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream
title_full	Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream
title_fullStr	Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream
title_full_unstemmed	Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream
title_sort	flow velocity preference of schizothorax oconnori lloyd swimming upstream
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/1f6065855e1c467f99f04addc437da89
work_keys_str_mv	AT yanliang flowvelocitypreferenceofschizothoraxoconnorilloydswimmingupstream AT yiqunhou flowvelocitypreferenceofschizothoraxoconnorilloydswimmingupstream AT wangbinhu flowvelocitypreferenceofschizothoraxoconnorilloydswimmingupstream AT davidjohnson flowvelocitypreferenceofschizothoraxoconnorilloydswimmingupstream AT junxingwang flowvelocitypreferenceofschizothoraxoconnorilloydswimmingupstream
_version_	1718443839823282176

Flow velocity preference of Schizothorax oconnori Lloyd swimming upstream

Ejemplares similares