An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish
This thesis investigates the influence of predator movements upon habitat selection and foraging success. It deals with two very distinct datasets one from a marine system, the snow crab (Chionoecetes opilio) fishery, and the second from a freshwater system, an experimental rainbow trout (Oncorhynch...
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ftcanadathes:oai:collectionscanada.gc.ca:MWU.1993/21695 2023-05-15T15:54:09+02:00 An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish Charles, Colin Gillis, Darren (Biological Sciences) Blanchfield, Paul (Biological Sciences) Walker, David (Environment and Geography) 2013-07-03T20:40:03Z http://hdl.handle.net/1993/21695 unknown http://hdl.handle.net/1993/21695 Abundance Index Aquaculture GLM UDOI Movement Hidden Markov Models Snow Crab Rainbow Trout CPUE 2013 ftcanadathes 2014-06-28T23:46:05Z This thesis investigates the influence of predator movements upon habitat selection and foraging success. It deals with two very distinct datasets one from a marine system, the snow crab (Chionoecetes opilio) fishery, and the second from a freshwater system, an experimental rainbow trout (Oncorhynchus mykiss) aquaculture operation. Deriving a standardized measure of catch from logbook data is important because catch per unit effort (CPUE) is used in fisheries analysis to estimate abundance, but it some cases CPUE is a biased estimate. For the snow crab fishery, a relative abundance measure was developed using fisher movements and logbook data that reflected commercially available biomass and produced an improved relative abundance estimate. Results from the aquaculture dataset indicate that escaped farmed rainbow trout continue to use the cage site when waste feed is available, while native lake trout do not interact with the cage. Once access to waste feed is removed, both lake trout and escaped rainbow trout do not use the cage site. This thesis uses methods to identify patterns and behaviours using movement tracks to increase our understanding of predator habitat usage. Other/Unknown Material Chionoecetes opilio Snow crab Theses Canada/Thèses Canada (Library and Archives Canada) |
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Open Polar |
collection |
Theses Canada/Thèses Canada (Library and Archives Canada) |
op_collection_id |
ftcanadathes |
language |
unknown |
topic |
Abundance Index Aquaculture GLM UDOI Movement Hidden Markov Models Snow Crab Rainbow Trout CPUE |
spellingShingle |
Abundance Index Aquaculture GLM UDOI Movement Hidden Markov Models Snow Crab Rainbow Trout CPUE Charles, Colin An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
topic_facet |
Abundance Index Aquaculture GLM UDOI Movement Hidden Markov Models Snow Crab Rainbow Trout CPUE |
description |
This thesis investigates the influence of predator movements upon habitat selection and foraging success. It deals with two very distinct datasets one from a marine system, the snow crab (Chionoecetes opilio) fishery, and the second from a freshwater system, an experimental rainbow trout (Oncorhynchus mykiss) aquaculture operation. Deriving a standardized measure of catch from logbook data is important because catch per unit effort (CPUE) is used in fisheries analysis to estimate abundance, but it some cases CPUE is a biased estimate. For the snow crab fishery, a relative abundance measure was developed using fisher movements and logbook data that reflected commercially available biomass and produced an improved relative abundance estimate. Results from the aquaculture dataset indicate that escaped farmed rainbow trout continue to use the cage site when waste feed is available, while native lake trout do not interact with the cage. Once access to waste feed is removed, both lake trout and escaped rainbow trout do not use the cage site. This thesis uses methods to identify patterns and behaviours using movement tracks to increase our understanding of predator habitat usage. |
author2 |
Gillis, Darren (Biological Sciences) Blanchfield, Paul (Biological Sciences) Walker, David (Environment and Geography) |
author |
Charles, Colin |
author_facet |
Charles, Colin |
author_sort |
Charles, Colin |
title |
An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
title_short |
An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
title_full |
An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
title_fullStr |
An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
title_full_unstemmed |
An examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
title_sort |
examination of predator habitat usage: movement analysis in a marine fishery and freshwater fish |
publishDate |
2013 |
url |
http://hdl.handle.net/1993/21695 |
genre |
Chionoecetes opilio Snow crab |
genre_facet |
Chionoecetes opilio Snow crab |
op_relation |
http://hdl.handle.net/1993/21695 |
_version_ |
1766389325617954816 |