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

1991 ◽  
Vol 48 (1) ◽  
pp. 67-72 ◽  
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.

Reciprocal Diel Vertical Migration Behavior in Planktivores and Zooplankton in British Columbia Lakes

1990 ◽  
Vol 47 (9) ◽  
pp. 1755-1764 ◽  
Author(s):  
David A. Levy
Keyword(s):  
British Columbia ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Sockeye Salmon ◽  
Distribution Patterns ◽  
Trophic Levels ◽  
Crustacean Zooplankton ◽  
Migration Behavior ◽  
Diel Vertical Migrations ◽  
Threespine Sticklebacks

Simultaneous comparison of planktivore and crustacean zooplankton distribution patterns in a set of British Columbia lakes suggested coupled diel vertical migration behavior in the two adjacent trophic levels. In lakes where juvenile sockeye salmon performed diel vertical migrations, most zooplankton were non-migratory and concentrated in shallow surface waters over the diel cycle. In contrast, in one lake where pelagic threespine sticklebacks were present, and where juvenile sockeye diel vertical migrations were periodically reversed, most zooplankton undertook diel vertical migrations. The presence of diel vertical migration behavior in zooplankton thus appears to be related to the presence or absence of the behavior in the predominant planktivores.

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

2011 ◽  
Vol 59 (3) ◽  
pp. 213-229 ◽  
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.

Light and diel vertical migration: spectral sensitivity and light avoidance by Mysis relicta

1999 ◽  
Vol 56 (2) ◽  
pp. 311-322 ◽  
Author(s):  
Gideon Gal ◽  
Ellis R Loew ◽  
Lars G Rudstam ◽  
Ali M Mohammadian
Keyword(s):  
New York ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Spectral Characteristics ◽  
Human Vision ◽  
Light Sources ◽  
Ambient Light ◽  
Mysis Relicta ◽  
Light Levels ◽  
Cayuga Lake

Ambient light levels determine the extent of diel vertical migration of many species including mysid shrimps. Light levels perceived by an organism depend on the intensity of light at the surface, the extinction of light through the water, and the sensitivity of the organism's light receptors. Each of these processes has spectral characteristics that should be taken into account when measuring perceived light levels. We used microspectrophotometry to determine that Mysis relicta has a single pigment with the characteristics of rhodopsin based on vitamin A1 and a peak sensitivity of 520 nm. Similar to the use of the lux (scaled to human vision), we give ambient light levels scaled to the mysid's visual spectrum in mylux units. Mysid distributions were observed with acoustics around two artificial light sources in Cayuga Lake, New York. Mysids avoided light levels of 3.4 × 10-7 to 2.1 × 10-6 mylux. Similar light levels limited their vertical distributions during the night in Lake Ontario and during the day in Cayuga Lake. Of standard light sensors available, lux meters are more appropriate than photosynthetically active radiation meters for determining light levels perceived by mysids.

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.

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

Mysis relicta Assimilation of Hexachlorobiphenyl from Sediments

1991 ◽  
Vol 48 (2) ◽  
pp. 284-289 ◽  
Author(s):  
J. Val Klump ◽  
Jerry L. Kaster ◽  
Michael E. Sierszen
Keyword(s):  
Particle Size ◽  
Vertical Migration ◽  
Specific Activity ◽  
Migration Behavior ◽  
Fecal Material ◽  
Selective Feeding ◽  
Deep Lakes ◽  
Mysis Relicta ◽  
Pelagic Environment ◽  
Important Pathway

Assimilation and retention of a PCB congener, 2,4,5,2′,4′,5′-hexachlorobiphenyl (HCBP), by the oppossum shrimp, Mysis relicta, was followed during sediment ingestion and defecation using a 14C label. Uptake was rapid and essentially linear, with mysids reaching a [14C]HCBP specific activity equivalent to that in the labeled sediment within 2 wk. Assimilation efficiencies calculated from the relative depletion of the label in the fecal material averaged 53% (±7%). Sediment ingestion rates calculated from the activity required to supply the label retained were approximately 1 mg∙mysid−1∙d−1, in agreement with published estimates. The distribution of HCBP as a function of particle size indicates that particle-size selective feeding by detritivores can have a significant effect on calculated assimilation efficiencies. Given the vertical migration behavior of M. relicta, sediment ingestion is a potentially important pathway for the reintroduction of sediment-associated contaminants into the pelagic environment of deep lakes.

scholarly journals Combined eDNA and Acoustic Analysis Reflects Diel Vertical Migration of Mixed Consortia in the Gulf of Mexico

2020 ◽  
Vol 7 ◽  
Author(s):  
Cole G. Easson ◽  
Kevin M. Boswell ◽  
Nicholas Tucker ◽  
Joseph D. Warren ◽  
Jose V. Lopez
Keyword(s):  
Gulf Of Mexico ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Acoustic Analysis

A Bioenergetics Analysis of Diel Vertical Migration by Kokanee Salmon, Oncorhynchus nerka

1993 ◽  
Vol 50 (11) ◽  
pp. 2336-2349 ◽  
Author(s):  
Mark S. Bevelhimer ◽  
S. Marshall Adams
Keyword(s):  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Oncorhynchus Nerka ◽  
General Rule ◽  
Foraging Efficiency ◽  
Energetic Efficiency ◽  
Net Energy ◽  
Migration Strategy ◽  
Kokanee Salmon ◽  
Growth Maximization

Diel vertical migration of fishes is probably a result of the combined effects of several selective forces, including predator avoidance, foraging efficiency, and bioenergetic efficiency. We considered both foraging efficiency and energetic efficiency as a combined effect which we called growth maximization. The importance of growth maximization as a selective force was evaluated with a bioenergetics-based model to estimate growth rates of various migration scenarios of kokanee salmon, Oncorhynchus nerka. Environmental parameters (temperature and zooplankton distributions) in the model were obtained from a North Carolina reservoir with an established population of kokanee. The simulations demonstrated that vertical migrations can be energetically advantageous when kokanee and their prey are thermally segregated and that ontogenetic and seasonal differences in the optimal migration strategy should be expected. The general rule for vertical migration as determined from the simulations is to feed where net energy intake is maximized and then reside when not feeding where energetic costs are minimized and food is digested to the point that consumption during the next feeding period is not limited by the amount of undigested food remaining in the stomach. Data obtained from vertical gill nets and hydroacoustics were compared with model predictions.

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

1984 ◽  
Vol 41 (12) ◽  
pp. 1837-1843 ◽  
Author(s):  
S. A. Arkett
Keyword(s):  
Feeding Behavior ◽  
Water Column ◽  
Vertical Migration ◽  
Diel Vertical Migration ◽  
Small Amplitude ◽  
Prey Density ◽  
Polyorchis Penicillatus ◽  
Emergence Traps ◽  
Invertebrate Larvae ◽  
Demersal Zooplankton

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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