Seasonal changes in the diel vertical migration of Chaoborus punctipennis larval instars

2014 ◽  
Vol 71 (5) ◽  
pp. 665-674 ◽  
Author(s):  
Lauren Emily Barth ◽  
W. Gary Sprules ◽  
Mathew Wells ◽  
Melissa Coman
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Acoustic Doppler Current Profiler ◽  
Acoustic Backscatter ◽  
Migration Behavior ◽  
Larval Instars ◽  
Reverse Migration ◽  
Coregonus Artedi ◽  
Chaoborus Punctipennis ◽  
Current Profiler

We describe a novel seasonal shift in the vertical migration behavior of Chaoborus punctipennis second-instar larvae in Lake Opeongo, Ontario. An upward-looking 600 kHz acoustic Doppler current profiler (ADCP) moored at a fixed 22 m station in the lake recorded acoustic backscatter continuously during the study period. Zooplankton samples collected indicated that the abundance of C. punctipennis larval instars accounted for the greatest proportion of variance in the linear backscatter from the ADCP. The large fourth-instar larvae underwent normal diel vertical migration throughout the study. Smaller second-instar larvae underwent reverse migration during late June but switched to normal migration by late July. The acoustic record indicates that the switch occurred over a few days around late June, and at this time a double vertical migration appeared with the second instars leading and following the migration of fourth instars. We speculate that these changes in the migration of second instars are driven by seasonal shifts in predation risk from larval cisco (Coregonus artedi) and by the need to minimize spatial overlap with the larger fourth instars.

Variability of Diel Vertical Migration in the Marine Planktonic Copepod Pseudocalanus newmani in Relation to Its Predators

1992 ◽  
Vol 49 (6) ◽  
pp. 1137-1141 ◽  
Author(s):  
Bruce W. Frost ◽  
Stephen M. Bollens
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Behavioral Plasticity ◽  
Migration Pattern ◽  
Migration Behavior ◽  
Central Basin ◽  
Reverse Migration ◽  
Ammodytes Hexapterus ◽  
Invertebrate Predators ◽  
Vertical Distributions

We report results of a 3-yr field study of the vertical distributions and diel vertical migration (DVM) of Pseudocalanus newmani in the central basin of Dabob Bay, Washington, USA. Our results include two novel findings. First, a statistically significant relationship exists between strength of DVM in P. newmani and the potential predation impact of its planktonic invertebrate predators. Second, a strong "normal" DVM (up at night, down during the day), unique for P. newmani in 5 yr of sampling at this locale, occurred at a time when the zooplanktivorous fish Ammodytes hexapterus was unusually abundant and preying on the copepod; this DVM may have been induced by the fish. DVM behavior of P. newmani was highly variable, with changes in behavior commonly occurring on a time scale of weeks; in one case the copepod switched from a normal migration pattern to a reverse migration pattern (down at night, up during the day) in less than 5 wk. These observations, combined with those of previous research, indicate that P. newmani has an exceptionally diverse repertoire of migration behavior, any particular expression of which is most likely manifested by individual copepods exercising phenotypic behavioral plasticity in response to potential predation.

scholarly journals Zooplankton diel vertical migration in the Corsica Channel (north-western Mediterranean Sea) detected by a moored acoustic Doppler current profiler

Ocean Science ◽  
2019 ◽  
Vol 15 (3) ◽  
pp. 631-649 ◽  
Author(s):  
Davide Guerra ◽  
Katrin Schroeder ◽  
Mireno Borghini ◽  
Elisa Camatti ◽  
Marco Pansera ◽  
...  
Keyword(s):  
Water Column ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Temporal Distribution ◽  
Acoustic Doppler Current Profiler ◽  
Western Mediterranean ◽  
Late Winter ◽  
Western Mediterranean Sea ◽  
Current Profiler ◽  
Deep Layers

Abstract. Diel vertical migration (DVM) is a survival strategy adopted by zooplankton that we investigated in the Corsica Channel using acoustic Doppler current profiler (ADCP) data from April 2014 to November 2016. The principal aim of the study is to characterize migration patterns and biomass temporal evolution of zooplankton along the water column. The ADCP measured vertical velocity and echo intensity in the water column range between about 70 and 390 m (the bottom depth is 443 m). During the investigated period, zooplanktonic biomass had a well-defined daily and seasonal cycle, with peaks occurring in late winter to spring (2015 and 2016) when the stratification of the water column is weaker. Zooplanktonic biomass temporal distribution in the whole water column is well correlated with biomass of primary producers, estimated with satellite data. Zooplanktonic blooming and non-blooming periods have been identified and studied separately. During the non-blooming period zooplanktonic biomass was most abundant in the upper and the deep layers, while during the blooming period the upper-layer maximum in zooplanktonic biomass disappeared and the deep layer with high zooplanktonic biomass became thicker. These two layers are likely to correspond to two different zooplanktonic communities. The evolution of zooplanktonic biomass is well correlated with chlorophyll, with phytoplankton biomass peaks preceding the upper-layer secondary production by a lag of about 3.5 weeks. Nocturnal DVM appears to be the main pattern during both periods, but reverse and twilight migration are also detected. Nocturnal DVM was more evident at mid-water than in the deep and the upper layers. DVM occurred with different intensities during blooming and non-blooming periods. One of the main outcomes is that the principal drivers for DVM are light intensity and stratification, but other factors, like the moon cycle and primary production, are also taken in consideration.

scholarly journals Diel vertical migration behavior of Calanus finmarchicus and its influence on right and sei whale occurrence

2011 ◽  
Vol 423 ◽  
pp. 167-184 ◽  
Author(s):  
MF Baumgartner ◽  
NSJ Lysiak ◽  
C Schuman ◽  
J Urban-Rich ◽  
FW Wenzel
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Calanus Finmarchicus ◽  
Migration Behavior

scholarly journals Experiments on the influence of Chaoborus brasiliensis Theobald, 1901 (Diptera: Chaoboridae) on the diel vertical migration of microcrustaceans from Lake Monte Alegre, Brazil

2010 ◽  
Vol 70 (1) ◽  
pp. 25-35 ◽  
Author(s):  
WJ. Minto ◽  
MS. Arcifa ◽  
A. Perticarrari
Keyword(s):  
Electrical Conductivity ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Physical Contact ◽  
Migratory Behaviour ◽  
Reverse Migration ◽  
Invertebrate Predators ◽  
Food Concentrations ◽  
Chemical Factors ◽  
Physical And Chemical

The aim of this work was to evaluate whether diel vertical migration of microcrustaceans from Lake Monte Alegre is related to invertebrate predators, namely larvae of Chaoborus brasiliensis. The hypothesis tested in the experiments was that the migratory behaviour of prey would depend on physical contact with Chaoborus brasiliensis larvae or with kairomones released by them. Two experiments were undertaken in the laboratory, with two treatments and three replicates each. Experiments were carried out in acrylic cylinders 1.5 m high and 0.20 m in diameter. Treatments in Experiment I were: A) predator and kairomones present and B) predator and kairomones present, but predator isolated in net tube inside the cylinder, having no physical contact with prey. Treatments in Experiment II were: A) predator and kairomones absent and B) the same as in experiment I. Physical and chemical factors (temperature, dissolved oxygen, pH, electrical conductivity) and food (algae) did not influence vertical distribution of prey, as they were almost homogeneously distributed in the water column in both experiments; food concentrations were not limiting. Adult copepods (Tropocyclops prasinus meridionalis and Thermocyclops decipiens) showed reverse migration in the treatment B of both experiments; the cladoceran Daphnia gessneri migrated nocturnally in the treatment A of the Experiment I; vertical migration was undetectable for copepodites, as well as for Chaoborus larvae. The experiments indicated that Daphnia responded to physical contact with Chaoborus larvae but not to kairomones alone. Adult copepods seemed to be more sensitive to kairomones.

Empirical evaluation of predator-driven diel vertical migration in Lake Superior

2010 ◽  
Vol 67 (3) ◽  
pp. 473-485 ◽  
Author(s):  
Jason D. Stockwell ◽  
Thomas R. Hrabik ◽  
Olaf P. Jensen ◽  
Daniel L. Yule ◽  
Matthew Balge
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Lake Superior ◽  
Empirical Evaluation ◽  
Salvelinus Namaycush ◽  
Seasonal Patterns ◽  
Mysis Relicta ◽  
Size Dependent ◽  
Coregonus Artedi ◽  
Using Data

Recent studies on Lake Superior suggest that diel vertical migration (DVM) of prey (generalized Coregonus spp.) may be influenced by the density of predatory siscowet ( Salvelinus namaycush ). We empirically evaluated this hypothesis using data from acoustic, midwater trawl, and bottom trawl sampling at eight Lake Superior sites during three seasons in 2005 and a subset of sites in 2006. We expected the larger-bodied cisco ( Coregonus artedi ) to exhibit a shallower DVM compared with the smaller-bodied kiyi ( Coregonus kiyi ). Although DVM of kiyi and cisco were consistent with expectations of DVM as a size-dependent, predator-mediated process, we found no relationship between siscowet density and the magnitude of DVM of either coregonid. Cisco appear to have a size refuge from siscowet predation. Kiyi and siscowet co-occur in demersal habitat > 150 m during the day, where visual predation is unlikely, suggesting predator avoidance is not a factor in the daytime distribution of kiyi. Seasonal patterns of kiyi DVM were consistent with reported DVM of their primary prey Mysis relicta . Our results suggest that consideration of nonvisual foraging, rather than light-based foraging theory (i.e., the antipredation window), is necessary to understand the processes driving DVM in deepwater systems.

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