Use of substratum ripples for flow refuging by Atlantic cod, Gadus morhua
dc.contributor.author | Gerstner, Cynthia L. | en_US |
dc.date.accessioned | 2006-09-08T20:33:38Z | |
dc.date.available | 2006-09-08T20:33:38Z | |
dc.date.issued | 1998-12 | en_US |
dc.identifier.citation | Gerstner, Cynthia L.; (1998). "Use of substratum ripples for flow refuging by Atlantic cod, Gadus morhua." Environmental Biology of Fishes 51(4): 455-460. <http://hdl.handle.net/2027.42/42640> | en_US |
dc.identifier.issn | 0378-1909 | en_US |
dc.identifier.issn | 1573-5133 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/42640 | |
dc.description.abstract | The ability to maintain position in a current without actively swimming (station-holding) was measured on substratum ripples for Atlantic cod, Gadus morhua, a bentho-pelagic fusiform species. The current velocities tested ranged from 0–111 cm sec -1 . Ripples were sinusoidal, with twelve combinations of ripple wavelength (10, 25, 50, 125 cm) and ripple amplitude (1.0, 2.5, 5.0 cm). Ripple wavelengths were chosen to approximate 0.5, 1.0, 2.0 and 5.0 times fish total length. The potential of ripples to locally retard current and thereby provide a refuge from the flow was measured as a velocity ratio, u trough /u free-stream , where u trough is the flow velocity measured at a height of 0.5 cm from the bottom of a trough and u free-stream the flow velocity measured at a height of 10 cm above ripple crests. Cod usually swam steadily above substratum ripple crests in the free-stream flow. They used substratum ripples to hold station on only 3 of the 12 ripples tested by refuging from the flow in the ripple troughs (flow refuging). These ripples had wavelengths approaching twice the body length, with ripple amplitudes that produced velocity ratios of 0.44–0.65, thus providing at least a 35% flow reduction in the troughs. In addition, these ripples were only used at intermediate velocities starting at 49–78 cm sec -1 and ending at 81–109 cm sec -1 depending on the ripple morphology, suggesting there may be costs involved in flow refuging, probably in stability control. Flow refuging on substratum ripples could dramatically impact the physiology and ecology of cod in high current velocities by providing areas of retreat for energetic savings, but also offering opportunities for enhanced feeding and migration. | en_US |
dc.format.extent | 56028 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Kluwer Academic Publishers; Springer Science+Business Media | en_US |
dc.subject.other | Environment | en_US |
dc.subject.other | Hydrobiology | en_US |
dc.subject.other | Zoology | en_US |
dc.subject.other | Animal Systematics/Taxonomy/Biogeography | en_US |
dc.subject.other | Environment, General | en_US |
dc.subject.other | Nature Conservation | en_US |
dc.subject.other | Station-holding | en_US |
dc.subject.other | Current | en_US |
dc.subject.other | Trough | en_US |
dc.subject.other | Fish | en_US |
dc.title | Use of substratum ripples for flow refuging by Atlantic cod, Gadus morhua | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Ecology and Evolutionary Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | The Center for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Lowestoft, Suffolk, NR33 OHT, England; School of Natural Resources & Environment, University of Michigan, Ann Arbor, MI, 48109-1115, U.S.A. | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/42640/1/10641_2004_Article_153122.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1023/A:1007449630601 | en_US |
dc.identifier.source | Environmental Biology of Fishes | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.