Diel Vertical Migration and Feeding Behavior of a Demersal Hydromedusan (Polyorchis penicillatus)

The hydromedusan Polyorchis penicillatus makes a small amplitude diel vertical migration. During the day, over 85% of the individuals were observed within 1 m of the bottom, while at night, medusae diffused several metres up into the water column. This movement occurred concomitantly with the emergence of many of the major taxa of demersal Zooplankton whose activity was quantified by emergence traps. Food boli contents collected from Polyorchis showed some selectivity for large, fast-moving demersal plankters and low capture and utilization of invertebrate larvae. Diel shifts in feeding behavior and water column position enable Polyorchis to feed efficiently on high densities of demersal plankters at all times. Medusae may be exempt from migration constraints imposed by visual predators and are thus able to move into areas of high prey density to supply energetic requirements. Hydromedusae, such as Polyorchis, are shown to utilize a variety of factors, such as tentacle position and swimming speed, in an "ambush" strategy to optimize prey encounters.

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Patterns of distribution and abundance of larval phosichthyidae (actinopterygii, stomiiformes) in southeastern Brazilian waters

Brazilian Journal of Oceanography ◽

10.1590/s1679-87592011000300002 ◽

2011 ◽

Vol 59 (3) ◽

pp. 213-229 ◽

Cited By ~ 1

Author(s):

Cássia Gôngora Goçalo ◽

Mario Katsuragawa ◽

Ilson Carlos Almeida da Silveira

Keyword(s):

Vertical Distribution ◽

Water Column ◽

Vertical Migration ◽

Diel Vertical Migration ◽

Distribution Patterns ◽

Southeastern Brazil ◽

Patterns Of Distribution ◽

Oceanic Region ◽

Brazil Current ◽

Horizontal And Vertical Distribution

Horizontal and vertical distribution patterns and abundance of larval phosichthyids were investigated from oblique and depth-stratified towns off Southeastern brazilian waters, from São Tomé cape (41ºW.; 22ºS.) to São Sebastião island (45ºW.; 24ºS.). The sampling was performed during two cruises (January/2002 -summer; August/2002 -winter). Overall 538 larvae of Phosichthyidae were collected during summer and 158 in the winter. Three species, Pollichthys mauli, Vinciguerria nimbaria and Ichthyioccoccus sp. occurred in the area, but Ichthyioccoccus sp. was extremely rare represented by only one specimen, caught in the oceanic region during the summer. Geographically, larval were concentrated in the oceanic region, and vertically distributed mainly between the surface and 80 m depth in the summer and winter. Larvae were more abundant during the night, performing a diel vertical migration in the water column. The results suggest that the meandering and eddies of Brazil Current play important role on the transport and distribution patterns of larval phosichthyids over the oceanic and neritic area in the Southeastern Brazil.

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Acoustic Analysis of Diel Vertical Migration Behavior of Mysis relicta and Kokanee (Oncorhynchus nerka) within Okanagan Lake, British Columbia

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f91-010 ◽

1991 ◽

Vol 48 (1) ◽

pp. 67-72 ◽

Cited By ~ 35

Author(s):

David A. Levy

Keyword(s):

Water Column ◽

Vertical Migration ◽

Diel Vertical Migration ◽

Acoustic Analysis ◽

Oncorhynchus Nerka ◽

Target Strength ◽

Migration Behavior ◽

Mysis Relicta ◽

Dual Beam ◽

Diel Vertical Migrations

Dual-beam acoustic surveys of Okanagan Lake suggested active diel vertical migrations of Mysis relicta and kokanee (Oncorhynchus nerka) within the pelagic zone. Mysis relicta were situated between 90–150 m during the day and migrated upwards into the thermocline region of the water column at night. Two groups of kokanee targets were detected. The first undertook a diel vertical migration and coalesced at dusk with a second, shallow-oriented group of targets. Daytime target strength estimates taken while the two groups were vertically segregated in the water column suggested an 8–12 db lower target strength of the deeper group. The results provide acoustic evidence for a smaller body size in the deeper group and the occurrence of an ontogenetic shift in diel migratory behavior of kokanee within Okanagan Lake. Diel comparisons of depth distribution suggested spatial segregation of Mysis and kokanee over much of the diel cycle.

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Diel Vertical Migration of Pandalus borealis in Kachemak Bay, Alaska

Journal of the Fisheries Research Board of Canada ◽

10.1139/f70-071 ◽

1970 ◽

Vol 27 (4) ◽

pp. 669-676 ◽

Cited By ~ 18

Author(s):

Louis Barr

Keyword(s):

Water Column ◽

Vertical Migration ◽

Diel Vertical Migration ◽

Bottom Trawling ◽

Pandalus Borealis ◽

Apparent Length ◽

Large Numbers

Catches of Pandalus borealis by surface-to-bottom pot fishing in Kachemak Bay, Alaska, showed that this species was distributed in large numbers throughout the water column at night and suggested a diel vertical migration. The shrimp apparently left the vicinity of the bottom about dusk and returned about dawn; the apparent length of time they were off bottom was directly related to the length of the night. Bottom trawling clearly showed lower availability of P. borealis on bottom at night than during the day. Catches of shrimp by pot fishing and trawling indicated that small P. borealis have a greater tendency to migrate vertically than the larger individuals.

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Growth and diel vertical migration patterns of the toxic dinoflagellate Protoceratium reticulatum in a water column with salinity stratification: the role of bioconvection and light

Marine Ecology Progress Series ◽

10.3354/meps11488 ◽

2015 ◽

Vol 539 ◽

pp. 47-64 ◽

Cited By ~ 2

Author(s):

SR Erga ◽

CD Olseng ◽

LH Aarø

Keyword(s):

Water Column ◽

Vertical Migration ◽

Diel Vertical Migration ◽

Toxic Dinoflagellate ◽

Migration Patterns ◽

Salinity Stratification ◽

Protoceratium Reticulatum

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Diel changes in vertical distribution of copepods community in Tanabe Bay, Japan

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315404009622h ◽

2004 ◽

Vol 84 (3) ◽

pp. 607-615 ◽

Cited By ~ 3

Author(s):

Shinji Shimode ◽

Yoshihisa Shirayama

Keyword(s):

Vertical Distribution ◽

Water Column ◽

Vertical Migration ◽

Diel Vertical Migration ◽

Weighted Mean ◽

Night Time ◽

Downward Migration ◽

Distributional Patterns ◽

Group B ◽

Group D

Diel vertical migration (DVM) and distributional patterns of copepods collected in the water column at shallow water site (Station M) in Tanabe Bay, Japan were investigated. Twenty-one taxa of zooplankton and 48 species of copepods at Station M had positive ΔZ values (subtraction of night-time weighted mean depth from daytime value) and performed normal DVM. The highest ΔZ value was 4·3 observed in Ambunguipes rufocincta. Three taxa and 39 species collected only at night also had high WMD (weighted mean depth) values (4·0∼7·5), which were previously considered hyperbenthic species. Statistically significant differences were found only in Myodocopina spp., Calocalanus plumulosus and Clausocalanus spp. Myodocopina spp. and Clausocalanus spp. showed downward migration at low to high and high tidal phases. Calocalanus plumulosus and some copepods performed downward migration during high and high to low tidal phases. Four distributional patterns of copepod species in Tanabe Bay were found. The groups are as follows: (A) true planktonic group; (B) swarming and night emerging group; (C) night emerging meiobenthic and hyperbenthic group; (D) symbiotic and night emerging group.

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Zooplankton diel vertical migration in the Corsica Channel (north-western Mediterranean Sea) detected by a moored ADCP

10.5194/os-2018-92 ◽

2018 ◽

Author(s):

Davide Guerra ◽

Katrin Schroeder ◽

Mireno Borghini ◽

Elisa Camatti ◽

Marco Pansera ◽

...

Keyword(s):

Water Column ◽

Vertical Migration ◽

Diel Vertical Migration ◽

Western Mediterranean ◽

Late Winter ◽

Surface Layers ◽

Western Mediterranean Sea ◽

Deep Layers ◽

Migratory Patterns ◽

Bottom Depth

Abstract. Diel vertical migration (DVM) is a survival strategy adopted by zooplankton, that was investigated in the Corsica Channel using ADCP data, from April 2014 to November 2016. The principal aim of the study is to characterize migratory patterns and biomass temporal evolution along the water column. The ADCP measured vertical velocity and echo intensity in the water column range between about 70 m and 390 m (the bottom depth is 443 m). In addition, net samples were taken during summer 2015 at the same location. During the investigated period, biomass had a well-defined daily and seasonal cycle, with peaks occurring in late winter–spring, when the stratification of water column is weaker. Biomass evolution along the whole water column is well correlated with primary production estimated with satellite data. Blooming and no-blooming periods have been identified and studied separately. During the no-blooming period biomass was most abundant in the surface and the deep layers, while during the blooming period the surface maximum disappeared and the deep layer with high biomass became thicker. These two layers are likely to correspond to two different zooplanktonic communities. Nocturnal DVM appears to be the main pattern during both periods, but also reverse and twilight migration are detected. Nocturnal DVM was more evident at mid-water than near in the deep and the surface layers. DVM occurred with different intensities in blooming and no-blooming periods, and phenomena like nocturnal sinking were found to be stronger during the blooming period. One of the main outcomes is that the principal drivers for DVM are light intensity and stratification, but also others are taken in consideration.

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

Ocean Science ◽

10.5194/os-15-631-2019 ◽

2019 ◽

Vol 15 (3) ◽

pp. 631-649 ◽

Cited By ~ 4

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.

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