搜索结果: 1-15 共查到“理学 Daphnia”相关记录64条 . 查询时间(0.089 秒)
Mitochondrial sequence variation suggests extensive cryptic diversity within the Western Palearctic Daphnia longispina complex
Mitochondrial sequence variation extensive cryptic diversity the Western Palearctic Daphnia longispina complex
2014/4/2
We report on a discovery of six divergent lineages within the European Daphnia longispina complex from various localities in central to northeast Europe. The levels of divergence from well-known speci...
The role of ultraviolet radiation and fish in regulating the vertical distribution of Daphnia
The role of ultraviolet radiation fish in regulating vertical distribution of Daphnia
2014/4/2
Previous studies have demonstrated independent effects of both solar ultraviolet radiation (UV; 280–400 nm) and planktivorous fish on the vertical distribution of Daphnia. We examined the behavioral r...
富营养湖泊中蓝藻水华对枝角类种群和群落结构有显著的影响，但自然条件下群体微囊藻对大型枝角类溞属不同种类的影响仍存在争议.本研究通过两次为期各10d的模拟实验，利用过滤后的太湖原水模拟群体微囊藻（20～100μm和100～200μm）添加对大型枝角类同形溞（Daphnia similis）种群特征的影响，结果显示两次实验的同形溞均大量存活，不同浓度和颗粒大小的群体微囊藻对其生长和繁殖的影响不同，添加...
Mitochondrial sequence variation suggests extensive cryptic diversity within the Western Palearctic Daphnia longispina complex
Mitochondrial sequence variation extensive cryptic diversity the Western Palearctic Daphnia longispina complex
2014/4/4
We report on a discovery of six divergent lineages within the European Daphnia longispina complex from various localities in central to northeast Europe. The levels of divergence from well-known speci...
The role of ultraviolet radiation and fish in regulating the vertical distribution of Daphnia
The role of ultraviolet radiation ish in regulating vertical distribution of Daphnia
2014/4/4
Previous studies have demonstrated independent effects of both solar ultraviolet radiation (UV; 280–400 nm) and planktivorous fish on the vertical distribution of Daphnia. We examined the behavioral r...
Temperature- and cholesterol-induced changes in eicosapentaenoic acid limitation of Daphnia magnadetermined by a promising method to estimate growth saturation thresholds
Temperature cholesterol-induced changes in eicosapentaenoic acid limitation Daphnia magnadetermined a promising method estimate growth saturation thresholds
2014/4/8
We present data on eicosapentaenoic acid (EPA)-limited growth responses ofDaphnia magnaunder different temperatures and different dietary cholesterol availabilities to assess how EPA growth saturation...
太湖夏秋季大型枝角类（Daphnia）种群消失的初步分析
种群消退 高温 磷浓度
2010/12/28
水体温度过高和磷浓度是影响枝角类Daphnia存活和繁殖的重要因子，因此本研究假设太湖夏秋季水体高温和磷浓度是引起Daphnia种群夏秋季消退的原因.通过夏秋季两次为期各15d的模拟实验，模拟高温和添加磷盐对太湖春季优势种同形溞Daphnia similis种群的影响，结果表明在高温和不添加磷盐的条件下，同形溞均有较高的种群增长率，证实夏秋季太湖水体高温和磷浓度不是限制Daphnia种群的因素，同...
Interactions between limiting nutrients: Consequences for somatic and population growth of Daphnia magna
Interactions between limiting nutrients population growth of Daphnia magna
2014/4/17
To assess the significance of nutrient interactions on animal performance, life-history experiments were
conducted with the freshwater herbivore Daphnia magna in a system with two limiting nutrients ...
Rapid evolution of phenoloxidase expression, a component of innate immune function, in a natural population of Daphnia magna
Rapid evolution phenoloxidase expression innate immune function in a natural population Daphnia magna
2014/4/17
We show rapid microevolution of one component of invertebrate innate immunity, phenoloxidase activity, in a natural population of the water fleaDaphnia magna.InDaphniahatched out of different depths o...
Hemoglobin concentration in Daphnia (D. galeata-hyalina) from the epilimnion is related to the state of nutrition and the degree of protein homeostasis
Daphnia protein homeostasis
2014/4/16
The function of hemoglobin (Hb), which is a key protein of many species, was analyzed in Daphnia from the
field. Temperature and oxygen content; abundance and composition of phytoplankton; and abunda...
Upward phosphorus transport by Daphnia diel vertical migration
Daphnia diel vertical migration phosphorus
2014/4/16
In many lakes, zooplankton show a distinct diel vertical migration (DVM) behavior, especially during periods
of stratification. Excretion products of these zooplankton could potentially cause an upwa...
The regulation of calcium in Daphnia magna reared in different calcium environments
Daphnia magna calcium environments
2014/4/18
The specific content, dissolved uptake rate, dietary assimilation efficiency (AE), and efflux rate constant (ke
) of
calcium (Ca) were quantified in juvenile (4-d) and adult (10-d) Daphnia magna cul...
Living in transparent lakes: Low food P:C ratio decreases antioxidant response to ultraviolet radiation in Daphnia
Living in transparent lakes Low food P:C ratio decreases antioxidant response ultraviolet radiation in Daphnia
2014/4/21
We experimentally tested the effect of food quality (phosphorus [P] : carbon [C] ratio) on the response of antioxidant enzymes to ultraviolet radiation (UVR) in Daphnia commutata fed with Chlamydomona...
Biochemical food quality effects on a Daphnia hybrid complex
Biochemical food quality a Daphnia hybrid complex
2014/4/21
Correlative field studies have shown that the food quality of natural seston for Daphnia is highly correlated with the content of eicosapentaenoic acid (EPA), indicating that the growth of Daphnia in ...
Stoichiometric regulation of carbon and phosphorus in P-deficient Daphnia magna
Stoichiometric regulation carbon phosphorus P-deficient Daphnia magna
2014/4/21
Daphnia magna were fed phosphorus-sufficient (+P) and P-deficient (2P) green algae Chlamydomonas reinhardtii (carbon : phosphorus ratio of C: P = 90 and 930 in molar, respectively) for 5 d to produce ...