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Broad whitefish Coregonus nasus have long been an important subsistence resource across its Arctic and sub-Arctic range. Despite its regional importance, little is known about the life history and ecology of this species. This research illuminates fundamental life-history information through the use...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.383.4750 2023-05-15T14:57:14+02:00 Table of Contents William K. Carter Iii Dr. Andres Lopez Broad Whitefish In The Middle Yukon River The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.383.4750 http://www.arlis.org/docs/vol1/B/608584074.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.383.4750 http://www.arlis.org/docs/vol1/B/608584074.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.arlis.org/docs/vol1/B/608584074.pdf text ftciteseerx 2016-09-18T00:27:58Z Broad whitefish Coregonus nasus have long been an important subsistence resource across its Arctic and sub-Arctic range. Despite its regional importance, little is known about the life history and ecology of this species. This research illuminates fundamental life-history information through the use of catch-per-uniteffort (CPUE) run timing, gonadosomatic index (GSI), radio telemetry, and aging and microchemical analysis of otoliths. From 2001 to 2006, fishwheels were used to capture individuals 1,200 km upstream from the mouth of the Yukon River. CPUE data indicated a consistent increase in daily fish numbers through mid-September. The GSI showed an increasing gonad weight over the sampling period, indicating preparation for spawning. Thirty-one of 41 radio-tagged fish were tracked to a 260 km long spawning area centered 350 km upstream of the tagging site. Thirteen of 17 fish found in the spawning area in 2003 overwintered nearby. Ages of 79 individuals ranged from 5 to 16 years (mean age = 10; median age = 9). Microchemical analysis showed amphidromy in 10 of 12 individuals by examining otolith strontium (Sr) concentrations. This information indicates that the broad whitefish captured in this study were mature, migrating to a spawning/overwintering area, and have a complex amphidromous life history. iv Text Arctic Yukon river Yukon Unknown Arctic Yukon |
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Broad whitefish Coregonus nasus have long been an important subsistence resource across its Arctic and sub-Arctic range. Despite its regional importance, little is known about the life history and ecology of this species. This research illuminates fundamental life-history information through the use of catch-per-uniteffort (CPUE) run timing, gonadosomatic index (GSI), radio telemetry, and aging and microchemical analysis of otoliths. From 2001 to 2006, fishwheels were used to capture individuals 1,200 km upstream from the mouth of the Yukon River. CPUE data indicated a consistent increase in daily fish numbers through mid-September. The GSI showed an increasing gonad weight over the sampling period, indicating preparation for spawning. Thirty-one of 41 radio-tagged fish were tracked to a 260 km long spawning area centered 350 km upstream of the tagging site. Thirteen of 17 fish found in the spawning area in 2003 overwintered nearby. Ages of 79 individuals ranged from 5 to 16 years (mean age = 10; median age = 9). Microchemical analysis showed amphidromy in 10 of 12 individuals by examining otolith strontium (Sr) concentrations. This information indicates that the broad whitefish captured in this study were mature, migrating to a spawning/overwintering area, and have a complex amphidromous life history. iv |
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The Pennsylvania State University CiteSeerX Archives |
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Text |
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William K. Carter Iii Dr. Andres Lopez Broad Whitefish In The Middle Yukon River |
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William K. Carter Iii Dr. Andres Lopez Broad Whitefish In The Middle Yukon River Table of Contents |
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William K. Carter Iii Dr. Andres Lopez Broad Whitefish In The Middle Yukon River |
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William K. Carter Iii |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.383.4750 http://www.arlis.org/docs/vol1/B/608584074.pdf |
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Arctic Yukon |
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Arctic Yukon |
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Arctic Yukon river Yukon |
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Arctic Yukon river Yukon |
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http://www.arlis.org/docs/vol1/B/608584074.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.383.4750 http://www.arlis.org/docs/vol1/B/608584074.pdf |
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