Control mechanisms of diel vertical migration: Theoretical assumptions

doi:10.1006/jtbi.2001.2307

	Control mechanisms of diel vertical migration: Theoretical assumptions
	Han, BP ; Straskraba, M
	2001-06-07
发表期刊	JOURNAL OF THEORETICAL BIOLOGY
ISSN	0022-5193
卷号	210 期号:3 页码:305-318
文章类型	Article
摘要	We explore control mechanisms underlying the vertical migration of zooplankton in the water column under the predator-avoidance hypothesis. Two groups of assumptions in which the organisms are assumed to migrate vertically in order to minimize realized or effective predation pressure (type-I) and to minimize changes in realized or effective predation pressure (type-II), respectively, are investigated. Realized predation pressure is defined as the product of light intensity and relative predation abundance and the part of realized predation pressure that really affects organisms is termed as effective predation pressure. Although both types of assumptions can lead to the migration of zooplankton to avoid the mortality from predators, only the mechanisms based on type-II assumptions permit zooplankton to undergo a normal diel vertical migration (morning descent and evening ascent). The assumption of minimizing changes in realized predation pressure is based on consideration of DVM induction only by light intensity and predators. The assumption of minimizing changes in effective predation pressure takes into account, apart from light and predators also the effects of food and temperature. The latter assumption results in the same expression of migration velocity as the former one when both food and temperature are constant over water depth. A significant characteristic of the two type-II assumptions is that the relative change in light intensity plays a primary role in determining the migration velocity. The photoresponse is modified by other environmental variables: predation pressure, food and temperature. Both light and predation pressure are necessary for organisms to undertake DVM. We analyse the effect of each single variable. The modification of the phototaxis of migratory organisms depends on the vertical distribution of these variables. (C) 2001 Academic Press.; We explore control mechanisms underlying the vertical migration of zooplankton in the water column under the predator-avoidance hypothesis. Two groups of assumptions in which the organisms are assumed to migrate vertically in order to minimize realized or effective predation pressure (type-I) and to minimize changes in realized or effective predation pressure (type-II), respectively, are investigated. Realized predation pressure is defined as the product of light intensity and relative predation abundance and the part of realized predation pressure that really affects organisms is termed as effective predation pressure. Although both types of assumptions can lead to the migration of zooplankton to avoid the mortality from predators, only the mechanisms based on type-II assumptions permit zooplankton to undergo a normal diel vertical migration (morning descent and evening ascent). The assumption of minimizing changes in realized predation pressure is based on consideration of DVM induction only by light intensity and predators. The assumption of minimizing changes in effective predation pressure takes into account, apart from light and predators also the effects of food and temperature. The latter assumption results in the same expression of migration velocity as the former one when both food and temperature are constant over water depth. A significant characteristic of the two type-II assumptions is that the relative change in light intensity plays a primary role in determining the migration velocity. The photoresponse is modified by other environmental variables: predation pressure, food and temperature. Both light and predation pressure are necessary for organisms to undertake DVM. We analyse the effect of each single variable. The modification of the phototaxis of migratory organisms depends on the vertical distribution of these variables. (C) 2001 Academic Press.
关键词	Predator-avoidance Food Availability Planktonic Copepod Calanus-pacificus Lake Maarsseveen Daphnia-hyalina Zooplankton Behavior Temperature Fish
学科领域	Biology ; Mathematical & Computational Biology
DOI	10.1006/jtbi.2001.2307
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000169584400003
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2826
专题	海洋生态与环境科学重点实验室
作者单位	1.Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Peoples R China 2.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China 3.Acad Sci Czech Republic, Biomath Lab, Ceske Budejovice 37005, Czech Republic 4.Univ S Bohemia, Fac Biol, Ceske Budejovice 37005, Czech Republic
推荐引用方式 GB/T 7714	Han, BP,Straskraba, M. Control mechanisms of diel vertical migration: Theoretical assumptions[J]. JOURNAL OF THEORETICAL BIOLOGY,2001,210(3):305-318.
APA	Han, BP,&Straskraba, M.(2001).Control mechanisms of diel vertical migration: Theoretical assumptions.JOURNAL OF THEORETICAL BIOLOGY,210(3),305-318.
MLA	Han, BP,et al."Control mechanisms of diel vertical migration: Theoretical assumptions".JOURNAL OF THEORETICAL BIOLOGY 210.3(2001):305-318.

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