dc.contributor.author | Georgian, Ted | |
dc.contributor.author | Thorp, James H. | |
dc.date.accessioned | 2015-05-06T14:11:13Z | |
dc.date.available | 2015-05-06T14:11:13Z | |
dc.date.issued | 1992-02-01 | |
dc.identifier.citation | Georgian, Ted; Thorp, James H. (1992). "Effects of Microhabitat Selection on Feeding Rates of Net-Spinning Caddisfly Larvae." Ecology, 73(1):229-240. http://www.dx.doi.org/10.2307/1938734. | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/17619 | |
dc.description.abstract | Net-spinning caddisfly larvae of the family Hydropsychidae are known to prefer microhabitats with large, stable substrate and high water flow velocity. It is often assumed that net spinners in high-velocity microhabitats have higher feeding or growth rates than larvae in less preferred sites, but there is no direct evidence to support this assumption. We hypothesized that net-spinning caddisflies would select microhabitats that offered the greatest feeding rates. This hypothesis was tested by field experiments in which we determined if net-spinning caddisfly larvae preferred high-velocity sites even when substrate size and type were held constant. We then measured feeding rates of net spinners in microhabitats with different flow characteristics. High-flow positions were selected by 96% of hydropsychid larvae colonizing artificial moss substrates. Artemia nauplii released into the water column were captured by individual larvae in high-flow sites at a rate of 0.016%/m, significantly higher than the capture rate in low-flow sites. Combining this rate of prey capture with mean hydropsychid densities of 1125 individuals/m2, we estimate that hydropsychid larvae in riffles remove drifting invertebrate prey at a rate of «18%/m. Assuming exponential prey removal, a prey item in the drift would travel an average of only 5.5 m before being consumed. This study is one of the first to show that the distribution of a stream filter feeder is related to the feeding rates obtainable in different microhabitats. | en_US |
dc.publisher | Ecological Society of America | en_US |
dc.rights | Copyright by the Ecological Society of America | |
dc.subject | Artificial substrates (Aquatic biology) | en_US |
dc.subject | Colonization | en_US |
dc.subject | Water current meters | en_US |
dc.subject | Marine invertebrates | en_US |
dc.subject | Microhabitat | en_US |
dc.subject | Net-spinning caddisflies | en_US |
dc.subject | Seston | en_US |
dc.title | Effects of Microhabitat Selection on Feeding Rates of Net-Spinning Caddisfly Larvae | en_US |
dc.type | Article | |
kusw.kuauthor | Thorp, James H. | |
kusw.kudepartment | Ecology and Evolutionary Biology | en_US |
dc.identifier.doi | 10.2307/1938734 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item meets KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |