Show simple item record

dc.contributor.authorTaube, Thomas Theodore
dc.date.accessioned2016-11-09T23:07:19Z
dc.date.available2016-11-09T23:07:19Z
dc.date.issued1992-05
dc.identifier.urihttp://hdl.handle.net/11122/7004
dc.descriptionThesis (M.S.) University of Alaska Fairbanks, 1992en_US
dc.description.abstractElectrofishing injury studies in Arizona and Alaska revealed spinal injury rates of over 50% among large (>300 mm long) rainbow trout Oncorhynchus mykiss captured by electrofishing with pulsed direct current (PDC). My goal was to identify an alternative waveform that would efficiently capture large rainbow trout with injury rates less than 15%. Experiments in homogeneous and heterogeneous electrical fields tested six waveforms; lower injury rates resulted with DC (17%), CPS™ (8%), and 20-Hz PDC at 75% duty cycle (25%). In field experiments with these three waveforms, PDC and DC gave higher capture rates than CPS™. However, injury rate was 60% with 20-Hz PDC and highly variable (0-47%) with DC. Long-term mortality of rainbow trout shocked with 60-Hz PDC at 50% duty cycle was 35% after 203 days. I recommend DC as an alternative to PDC waveforms for relatively safe and efficient capture of large rainbow trout.en_US
dc.language.isoen_USen_US
dc.subjectElectric fishing
dc.subjectRanbow trout
dc.subjectEffects of fishing on
dc.subjectWounds and injuries
dc.titleInjury, survival and growth of rainbow trout captured by electrofishingen_US
dc.typeThesisen_US
dc.type.degreemsen_US
refterms.dateFOA2020-03-05T13:46:58Z


Files in this item

Thumbnail
Name:
Taube_T_1992.pdf
Size:
1.339Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record