Comprehensive Xxxxx Surveys. The Comprehensive Lake Chelan management plan was designed to alter the abundance and composition of fish species in Lake Chelan. The plan outlines many methods to accomplish this goal. The purpose of a xxxxx survey on Lake Chelan is to collect the necessary information to evaluate the success of those methods. Of particular importance was the collection of data to evaluate westslope cutthroat trout replacement of rainbows in the sport harvest. Equally important was annual sampling of kokanee population abundance and age composition; information needed to guide implementation of kokanee management. In 2013, the kokanee survey was contained within the comprehensive xxxxx survey. Sampling of kokanee size by age, population composition by age and catch-per-unit- effort (CPUE) of the current population during the spring fishing season should provide an estimate of the up-coming fall spawning escapement. All of the fish that become spawners in the fall would have been available for harvest the spring of the same year. This information will be used to predict the upcoming fall spawner abundance and determine whether eggs should be collected from spawning kokanee, taken to Chelan Hatchery, reared to fry size and released back into Lake Chelan or into other lakes around the state to supplement various fisheries. In addition other information collected will assist with various fish management decisions. Xxxxx survey methods: To ensure results from xxxxx surveys on Lake Chelan are useful and relevant, the methods used needed to be comparable to those used in the past by Duke Engineering Service (2000), Xxxxx (1997), and Xxxxx (1984); the methods outlined here are designed with this in mind. The main objectives are: 1) determine the relative composition of fish species and origin (naturally produced or hatchery released) contributing to the sport fishery; 2) determine what species of fish anglers prefer to catch and; 3) obtain effort and harvest information. Periodic effort counts i.e. (boat counts), and roving on–lake angler interviews were used beginning in April and continuing until mid-October or until angler effort was so low that further surveys were deemed not cost effective. Both effort counts and the angler interviews were scheduled on a stratified random basis. Strata included weekdays, weekends, A.M. (0700 –1400 hours) and P.M. (1400 – 1100 hours) time periods, upper- lake (up-lake from Safety Harbor) and lower-lake (down-lake from Safety Harbor). At least two randomly chosen weekdays and one non-random weekend day, alternating between Saturday and Sunday, were sampled per week. Effort counts consisted of counting the number of boats observed (independently for the upper and lower portions of the lake). Angler interviews were designed to collect information on individual angler effort (hours fished), fish caught and kept (or released) by species, fish length, weight, scales samples; (otoliths from burbot) for age analysis; all fin clips or other identifying marks were recorded. Stomach samples were obtained from Chinook by offering to clean angler’s fish. Stomachs were preserved in a 10% solution of formalin for future analysis. A questionnaire designed to learn angler species preference and satisfaction was handed out during interviews with a self-addressed envelope. Anglers were asked to answer the questions when they have time and return the questionnaire by mail.
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Samples: www.chelanpud.org, www.chelanpud.org
Comprehensive Xxxxx Surveys. The Comprehensive Lake Chelan management plan was designed to alter the abundance and composition of fish species in Lake Chelan. The plan outlines many methods to accomplish this goal. The purpose of a xxxxx survey on Lake Chelan is to collect the necessary information to evaluate the success of those methods. Of particular importance was the collection of data to evaluate westslope cutthroat trout (WCT) replacement of rainbows rainbow trout (XXX) in the sport harvest. Equally important was annual sampling of kokanee population abundance and age composition; information needed to guide implementation of kokanee management. In 20132016, the kokanee survey was contained within the comprehensive xxxxx survey. Sampling of kokanee size by age, population composition by age and catch-per-unit- effort (CPUE) of the current population during the spring fishing season should provide an estimate of the up-coming fall spawning escapement. All of the fish that become spawners in the fall would have been available for harvest the spring of the same year. This information will be used to predict the upcoming fall spawner abundance and determine whether eggs should be collected from spawning kokanee, taken to Chelan Hatchery, reared to fry size size, and released back into Lake Chelan or into other lakes around the state to supplement various fisheries. In addition addition, other information collected will assist with various fish management decisions. The Lake Chelan Comprehensive Xxxxx Survey is conducted on a tri-annual basis; the next scheduled survey will be conducted in 2019. Xxxxx survey methods: To ensure results from xxxxx surveys on Lake Chelan are useful and relevant, the methods used needed to be comparable to those used in the past by Duke Engineering Service (2000), Xxxxx (1997), and Xxxxx (1984); the methods outlined here are designed with this in mind. The main objectives are: 1) determine the relative composition of fish species and origin (naturally produced or hatchery released) contributing to the sport fishery; 2) determine what species of fish anglers prefer to catch and; 3) obtain effort and harvest information. Periodic effort counts i.e. (boat counts), and roving on–lake angler interviews were used beginning in April and continuing until mid-October or until angler effort was so low that further surveys were deemed not cost effective. Both effort counts and the angler interviews were scheduled on a stratified random basis. Strata included weekdays, weekends, A.M. (0700 –1400 hours) and P.M. (1400 – 1100 2100 hours) time periods, upper- lake (up-lake from Safety HarborTwenty-Five Mile Creek) and lower-lake (down-lake from Safety HarborTwenty- Five Mile Creek). At least two randomly chosen weekdays and one non-random weekend day, alternating between Saturday and Sunday, were sampled per week. Effort counts consisted of counting the number of boats observed (independently for the upper and lower portions of the lake). Angler interviews were designed to collect information on individual angler effort (hours fished), fish caught and kept (or released) by species, fish length, weight, scales samples; (otoliths from burbot) for age analysis; all fin clips or other identifying marks were recorded. Stomach samples were obtained from Chinook by offering to clean angler’s fish. Stomachs were preserved in a 10% solution of formalin for future analysis. A questionnaire designed to learn angler species preference and satisfaction was handed out during interviews with a self-addressed envelope. Anglers were asked to answer the questions when they have time and return the questionnaire by mail.. 2016 survey results (lower lake); Twenty-Five Mile Creek down-lake to Chelan: During April - October of 2016 we interviewed 802 anglers that fished for a total of 4,644 hours (Table 1). We estimated that 4,850 anglers fished for 25,108 hours and caught a total of 18,817 fish. The catch was comprised of 0.3% Chinook (100% naturally produced), 60.0% kokanee (100% naturally produced), 0.0% burbot, 9.3% lake trout, 0.7 % XXX, 9.4 % WCT and 20.4% smallmouth bass (Table 2-2, Figure 2-1). Table 2-1: 2016 Lake Chelan xxxxx survey angler data (lower lake). Sample Data Apr May June July Aug Sept Oct Total Angler Sample Rate: 20.8% 14.9% 18.8% 7.7% 2.8% 6.7% 34.0% 16.5% Total Anglers Interviewed: 322 187 232 27 5 16 13 802 Total Fishing Hours Sampled: 2,129 1,008 1,262 102 19 79 46 4,644 Mean Hours per Trip: 6.6 5.4 5.4 3.8 3.8 4.9 3.6 4.8 Chinook 0.3% Smallmouth Bass 20.4% Cutthroat 9.4% Kokanee 60.0% Lake Trout 9.3% Burbot 0.0% Rainbow 0.7% Figure 2-1: 2016 Lake Chelan species catch composition (lower lake). Table 2-2: 2016 Lake Chelan xxxxx survey results (lower lake). Estimated Results Apr May June July Aug Sept Oct Total Effort (hrs): 9,027 6,304 6,453 1,277 682 1,166 199 25,108 Angler Trips: 1,548 1,258 1,236 352 178 240 38 4,850 Kokanee Harvest: 3,048 3,529 3,894 644 0 12 56 11,183 Kokanee Release: 52 0 13 39 0 0 0 104 Kokanee Total Catch: 3,100 3,529 3,907 683 0 12 56 11,287 Lake Trout Harvest: 314 497 524 289 0 12 90 1,726 Lake Trout Total Catch: 322 504 524 289 0 12 90 1,741 Rainbow Trout Harvest: 8 20 33 0 0 0 3 64 Cutthroat Trout Harvest: 1,035 518 5 0 0 0 14 1,572 Cutthroat Trout Total Catch: 1,176 558 0 0 0 0 34 1,773 XX Xxxx Harvest: 36 0 11 0 114 0 0 161 XX Xxxx Release: 580 1,109 1,511 0 284 199 0 3,683 XX Xxxx Total Catch: 616 1,109 1,522 0 398 199 0 3,844 Grand Total Catch: 1,232 2,218 3,450 0 796 796 0 18,817 2016 survey results (upper lake); Twenty-Five Mile Creek up-lake to Stehekin: During April - October of 2016 we interviewed 153 anglers that fished for a total of 686 hours (Table 3). We estimated that 1,490 anglers fished for 7,392 hours and caught a total of 4,400 fish. The catch was comprised of 0.4% Chinook (100% naturally produced), 63.3% kokanee (100% naturally produced), 0.0% burbot, 6.0% lake trout, 1.3 % rainbow,
Appears in 1 contract
Samples: www.chelanpud.org
Comprehensive Xxxxx Surveys. The Comprehensive Lake Chelan management plan was designed to alter the abundance and composition of fish species in Lake Chelan. The plan outlines many methods to accomplish this goal. The purpose of a xxxxx survey on Lake Chelan is to collect the necessary information to evaluate the success of those methods. Of particular importance was the collection of data to evaluate westslope cutthroat trout (WCT) replacement of rainbows rainbow trout (XXX) in the sport harvest. Equally important was annual sampling of kokanee population abundance and age composition; information needed to guide implementation of kokanee management. In 20132016, the kokanee survey was contained within the comprehensive xxxxx survey. Sampling of kokanee size by age, population composition by age and catch-per-unit- effort (CPUE) of the current population during the spring fishing season should provide an estimate of the up-coming fall spawning escapement. All of the fish that become spawners in the fall would have been available for harvest the spring of the same year. This information will be used to predict the upcoming fall spawner abundance and determine whether eggs should be collected from spawning kokanee, taken to Chelan Hatchery, reared to fry size size, and released back into Lake Chelan or into other lakes around the state to supplement various fisheries. In addition addition, other information collected will assist with various fish management decisions. The Lake Chelan Comprehensive Xxxxx Survey is conducted on a tri-annual basis; the next scheduled survey will be conducted in 2019. Xxxxx survey methods: To ensure results from xxxxx surveys on Lake Chelan are useful and relevant, the methods used needed to be comparable to those used in the past by Duke Engineering Service (2000), Xxxxx (1997), and Xxxxx (1984); the methods outlined here are designed with this in mind. The main objectives are: 1) determine the relative composition of fish species and origin (naturally produced or hatchery released) contributing to the sport fishery; 2) determine what species of fish anglers prefer to catch and; 3) obtain effort and harvest information. Periodic effort counts i.e. (boat counts), and roving on–lake angler interviews were used beginning in April and continuing until mid-October or until angler effort was so low that further surveys were deemed not cost effective. Both effort counts and the angler interviews were scheduled on a stratified random basis. Strata included weekdays, weekends, A.M. (0700 –1400 hours) and P.M. (1400 – 1100 2100 hours) time periods, upper- lake (up-lake from Safety HarborTwenty-Five Mile Creek) and lower-lake (down-lake from Safety HarborTwenty- Five Mile Creek). At least two randomly chosen weekdays and one non-random weekend day, alternating between Saturday and Sunday, were sampled per week. Effort counts consisted of counting the number of boats observed (independently for the upper and lower portions of the lake). Angler interviews were designed to collect information on individual angler effort (hours fished), fish caught and kept (or released) by species, fish length, weight, scales samples; (otoliths from burbot) for age analysis; all fin clips or other identifying marks were recorded. Stomach samples were obtained from Chinook by offering to clean angler’s fish. Stomachs were preserved in a 10% solution of formalin for future analysis. A questionnaire designed to learn angler species preference and satisfaction was handed out during interviews with a self-addressed envelope. Anglers were asked to answer the questions when they have time and return the questionnaire by mail.. 2016 survey results (lower lake); Twenty-Five Mile Creek down-lake to Chelan: During April - October of 2016 we interviewed 802 anglers that fished for a total of 4,644 hours (Table 1). We estimated that 4,850 anglers fished for 25,108 hours and caught a total of 18,817 fish. The catch was comprised of 0.3% Chinook (100% naturally produced), 60.0% kokanee (100% naturally produced), 0.0% burbot, 9.3% lake trout, 0.7 % XXX, 9.4 % WCT and 20.4% smallmouth bass (Table 2-2, Figure 2-1). Table 2-1: 2016 Lake Chelan xxxxx survey angler data (lower lake). Sample Data Apr May June July Aug Sept Oct Total Angler Sample Rate: 20.8% 14.9% 18.8% 7.7% 2.8% 6.7% 34.0% 16.5% Total Anglers Interviewed: 322 187 232 27 5 16 13 802 Total Fishing Hours Sampled: 2,129 1,008 1,262 102 19 79 46 4,644 Mean Hours per Trip: 6.6 5.4 5.4 3.8 3.8 4.9 3.6 4.8 Chinook 0.3% Smallmouth Bass 20.4% Cutthroat 9.4% Kokanee 60.0% Lake Trout 9.3% Burbot 0.0% Rainbow 0.7% Figure 2-1: 2016 Lake Chelan species catch composition (lower lake). Table 2-2: 2016 Lake Chelan xxxxx survey results (lower lake). Estimated Results Apr May June July Aug Sept Oct Total Effort (hrs): 9,027 6,304 6,453 1,277 682 1,166 199 25,108 Angler Trips: 1,548 1,258 1,236 352 178 240 38 4,850 Kokanee Harvest: 3,048 3,529 3,894 644 0 12 56 11,183 Kokanee Release: 52 0 13 39 0 0 0 104 Kokanee Total Catch: 3,100 3,529 3,907 683 0 12 56 11,287 Lake Trout Harvest: 314 497 524 289 0 12 90 1,726 Lake Trout Total Catch: 322 504 524 289 0 12 90 1,741 Cutthroat Trout Harvest: 1,035 518 5 0 0 0 14 1,572 Cutthroat Trout Total Catch: 1,176 558 0 0 0 0 34 1,773 XX Xxxx Harvest: 36 0 11 0 114 0 0 161 XX Xxxx Release: 580 1,109 1,511 0 284 199 0 3,683 XX Xxxx Total Catch: 616 1,109 1,522 0 398 199 0 3,844 Grand Total Catch: 1,232 2,218 3,450 0 796 796 0 18,817 2016 survey results (upper lake); Twenty-Five Mile Creek up-lake to Stehekin: During April - October of 2016 we interviewed 153 anglers that fished for a total of 686 hours (Table 3). We estimated that 1,490 anglers fished for 7,392 hours and caught a total of 4,400 fish. The catch was comprised of 0.4% Chinook (100% naturally produced), 63.3% kokanee (100% naturally produced), 0.0% burbot, 6.0% lake trout, 1.3 % rainbow,
Appears in 1 contract
Samples: www.chelanpud.org
