Dynamics of refuge use: diurnal, vertical migration by predatory and herbivorous mites within cassava plants

Oikos ◽  
2003 ◽  
Vol 101 (1) ◽  
pp. 59-69 ◽  
Author(s):  
Alexis Onzo ◽  
Rachid Hanna ◽  
Ignace Zannou ◽  
Maurice W. Sabelis ◽  
John S. Yaninek
Keyword(s):  
Vertical Migration ◽  
Refuge Use ◽  
Diurnal Vertical Migration

scholarly journals Diurnal vertical migration of some cladocerans in relation to the physico-chemical factors in a fish pond

1970 ◽  
Vol 20 (2) ◽  
pp. 147-154 ◽  
Author(s):  
AS Bhuiyan ◽  
S Akhter ◽  
MMA Quddus
Keyword(s):  
Key Words ◽  
Vertical Migration ◽  
Fish Pond ◽  
Chemical Parameters ◽  
Surface Layers ◽  
Diurnal Vertical Migration ◽  
Physico Chemical ◽  
Chemical Factors ◽  
Diurnal Movement ◽  
The Relationship

Diurnal vertical migration of four genera of cladocerans, namely Diaphanosoma sp., Daphnia sp., Moina sp. and Bosmina sp., during March to December, 2007 showed that the number of Diaphanosoma sp. was 501 units/1 in the surface layers, 172 units/l in the middle layers and 190 units/l in the bottom layers. The yearly number of Daphnia sp. in surface, middle and bottom layerss was 362 units/l, 46 units/l and 189 units/l respectively. In surface, bottom and middle layers, the number of Moina sp. was 159, 71 and 32 units/l, respectively. Bosmina sp. was 78 units/l in surface, 31 units/l in the middle and 33 units/l in the bottom layers. The number of Diaphanosoma sp., Daphnia sp., Moina sp., Bosmina sp., were 455, 149, 259 and 358 units/l, respectively in the morning, 63, 176, 142, 43 units/l at noon and 107, 55, 28, 59 units/l, respectively in the evening. Throughout the study period the cladocerans were always abundant near the surface during morning and evening. Among the factors responsible for the diurnal movement of cadoceran, light played the most important factor. The relationship between the physico-chemical factors and the cladoceran occurrence in the pond was also explored. Key words: Cladocera; Diurnal migration; Physico-chemical parameters; Fish pond DOI: http://dx.doi.org/10.3329/dujbs.v20i2.8975 DUJBS 2011; 20(2): 147-154

Review of information on diurnal vertical migration in the bignose shark (Carcharhinus altimus)

1996 ◽  
Vol 47 (4) ◽  
pp. 605 ◽  
Author(s):  
RC Anderson ◽  
JD Stevens
Keyword(s):  
Vertical Migration ◽  
Pelagic Zone ◽  
Benthic Species ◽  
Diurnal Vertical Migration

The bignose shark (Carcharhinus altimus) has been described in the literature as a deep-benthic species. Evidence is presented that C. altimus is a diurnal vertical migrator. It occurs near the bottom in about 90-500 m by day. At night, at least some individuals move into shallower water or up into the pelagic zone.

Highly replicated sampling reveals no diurnal vertical migration but stable species-specific vertical habitats in planktonic foraminifera

2019 ◽  
Vol 41 (2) ◽  
pp. 127-141 ◽  
Author(s):  
Julie Meilland ◽  
Michael Siccha ◽  
Manuel F G Weinkauf ◽  
Lukas Jonkers ◽  
Raphael Morard ◽  
...  
Keyword(s):  
Vertical Migration ◽  
Planktonic Foraminifera ◽  
Diurnal Vertical Migration ◽  
Stable Species ◽  
Species Specific

EFFECT OF KAIROMONE ON PREDATOR–PREY DYNAMICS — A DELAY MODEL

2013 ◽  
Vol 06 (05) ◽  
pp. 1350035 ◽  
Author(s):  
SUDIP SAMANTA ◽  
JOYDEV CHATTOPADHYAY
Keyword(s):  
Vertical Migration ◽  
Defense Mechanisms ◽  
Multiple Delays ◽  
Predator Population ◽  
Delay Model ◽  
Refuge Use ◽  
Predator Prey ◽  
Interior Equilibrium ◽  
Fish Kairomone ◽  
The Stability

In most of the predator–prey systems, prey individuals make transitions between vulnerable and invulnerable states or locations. This transition is regulated by various inducible defense mechanisms. Diel vertical migration (DVM) in zooplankton is the most effective and instantaneous defense observed in zooplankton population. Zooplankton shows downward vertical migration in the daytime in the presence of predators (or predator kairomones) to avoid predation (i.e. refuge use), and it enters into the surface water again at night to graze phytoplankton. The dynamics of the planktonic ecosystem under DVM of zooplankton along with fish kairomone and the multiple delays due to migration for vulnerable and invulnerable prey and reproduction in the predator population is of considerable interest both in theoretical and experimental ecologists. By developing mathematical model, we analyze such a system. The conditions for which the system enters into Hopf-bifurcation are obtained. Moreover, the conditions for which the bifurcating branches are supercritical are also derived. Our results indicate that DVM along with the effect of kairomone and multiple delays with a certain range are responsible to enhance the stability of the system around the positive interior equilibrium point.

Community Structure and Biomass of Euphausiids in the Bay of Fundy

1982 ◽  
Vol 39 (2) ◽  
pp. 326-334 ◽  
Author(s):  
D. W. Kulka ◽  
S. Corey ◽  
T. D. Iles
Keyword(s):  
Life History ◽  
Community Structure ◽  
Vertical Migration ◽  
High Intensity ◽  
Sampling Scheme ◽  
Bay Of Fundy ◽  
Migration Patterns ◽  
Life History Stages ◽  
Diurnal Vertical Migration ◽  
Meganyctiphanes Norvegica

Seven species of euphausiids were found in the Bay of Fundy: Meganyctiphanes norvegica, Thysanoessa inermis, T. longicaudata, T. raschii, T. gregaria, Euphausia krohnii, and Nematoscelis megalops (listed in descending order of abundance). A high-intensity sampling scheme during November and March facilitated detailed distributional studies which revealed that M. norvegica, T. inermis, and T. longicaudata each had a specific stationary center of abundance in the study area, and each species performed a different pattern of diurnal vertical migration. Meganyctiphanes norvegica formed 90% (constituting 70 kt) of the euphausiids. The last four species were occasional immigrants from areas south of the Bay of Fundy. From the relationships between life history stages, vertical migration patterns, distribution, and currents in the Fundy Region, we suggest that these euphausiid species form stocks.Key words: euphausiids, Meganyctiphanes norvegica, Thysanoessa inermis, Thysanoessa longicaudata, biomass, community structure, stock, Bay of Fundy

scholarly journals Blue light regulates the rhythm of diurnal vertical migration in the raphidophyte red-tide alga Chattonella antiqua

2013 ◽  
Vol 35 (3) ◽  
pp. 542-552 ◽  
Author(s):  
Tomoyuki Shikata ◽  
Shigeru Matsunaga ◽  
Mineo Iseki ◽  
Hiroyo Nishide ◽  
Sho-Ichi Higashi ◽  
...  
Keyword(s):  
Blue Light ◽  
Vertical Migration ◽  
Red Tide ◽  
Chattonella Antiqua ◽  
Diurnal Vertical Migration
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