SUMMARY OF MOVEMENT AND HABITAT USED BY TAGGED BROOK TROUT IN THE MAIN BRANCH AND NORTH BRANCH AU SABLE RIVER DURING SUMMER 2014 Data Submitted to: Anglers of the Au Sable Submitted by: Dr. Mark R. Luttenton Annis Water Resources Institute and Biology Department Grand Valley State University Allendale, MI 49401 1
Efforts to understand and improve the quality of the Au Sable River have been ongoing since the 1930 s. In spite of this effort, it appears that brook trout, a native stream salmonid in Michigan, have been declining. Previous studies have evaluated brook trout populations relative to numerous ecological variables and have noted that the amount of large woody structure present in the Au Sable is positively correlated with brook trout abundance (Zorn and Nuhfer 2007). However, our understanding of how brook trout respond to habitat and/or habitat improvement is incomplete. During summer 2013, the Mason-Griffith Founders Chapter of Trout Unlimited conducted work projects to install wood structures in the Au Sable River above Grayling. Historically, woody structure in that region has been relatively limited. Similar habitat projects were planned for the North Branch Au Sable River by the Anglers of the Au Sable. In this project we identify the structures (natural or constructed) used by brook trout and quantify features of the structures that brook trout occupy. To do this, we used telemetry to collect data on the daily and seasonal movements of brook trout, their habitat preference, and their response to warm summer temperatures. This project will be used to inform future habitat improvement projects. The proposed project will include: 1. Tracking 20 brook trout simultaneously, 2. Tracking fish in the North Branch and mainstream of the Au Sable River system simultaneously, 3. Tracking most tagged fish throughout the summer and fall, 4. Quantifying the physical complexity of home-sites, 5. Quantifying the physical nature of nighttime locations and 6. Quantifying brook trout movement during warm weather The proposed project would complement a current brown trout telemetry study. During summer and fall 2014, we tracked a combined 17 brook trout in the Main Branch and North Branch Au Sable River. B. Objectives: The objective is to better understand brook trout habitat use in the Au Sable River; information which will form the basis of future habitat improvement projects and provides insight into the potential brook trout response to warming temperatures. Specifically, the goals of this project will be: 1) track the movements of brook trout in the Au Sable River system for approximately 7 months, 2) identify specific locations and habitats utilized by brook trout, 3) quantify the physical structure of habitat associated with brook trout home sites and movements, 4) quantify the physical nature of nighttime locations and 5) identify spawning sites utilized by tagged fish. 2
C. Results and Summary: 1. Tracking We were able to track 16 fish during the course of the study. We tagged a total of 20 fish, but 4 fish were not included in the results because the fish and tag were lost before a sufficient number of tracks were completed. Brook trout movement appears to be relatively limited. Average total distance moved by brook trout in the Main Branch Au Sable River was 241.75 meters (792.9 feet). Brook trout tracked in the North Branch averaged 387.61 meters (1271.4 feet). This includes movement during the fall spawning period. Although brook trout generally left day time sites during evening hours, they did not exhibit a regular movement pattern. Unlike brown trout, brook trout did not consistently move to a night time location, but tended to move to different locations. In addition, brook trout appeared to move more at night. 2. Identify Specific Habitat and Locations Brook trout averaged 1.7 day sites during the study. This suggests that most brook trout moved to a new day time site at least once during the study. Thus, brook trout exhibit less home site fidelity than brown trout. Brook trout did not regularly establish a night time feeding site. 3. Quantify the Physical Structure of Habitat Associated with Brook Trout Home Sites and Movements - Brook trout day time home sites were relatively shallow, but did provide relief from stream flow by reducing flow velocity (Table 1). However, day sites were moderately complex and generally located close to the bank (Table 2). Home sites close to shore may have been a response to groundwater discharge. Habitat size averaged 8.8 meters (29.0 feet) long and 4.5 meters (14.8 feet) wide. Overhead structure provided approximately 50% cover. 4. Quantify the Physical Nature of Nighttime Locations Brook trout were tracked to a variety of locations during the study. Locations included slightly deeper pools to shallow sandy runs with no cover. 5. Identify Spawning Sites Utilized by Tagged Fish Spawning movement appeared to occur during October. I have included detailed maps for each fish showing fish locations. Dates are included for reference; October dates typically indicate approximate spawning locations. D. Habitat Analysis The following tables provide physical measurements of habitats utilized by brook trout during summer 2014. The tables are generally arranged from upstream to downstream for both the Main Branch and North Branch Au Sable River. Information includes, stream branch, specific location (e.g., Batterson), a general habitat description, and measurements taken at the location. The following illustration shows the general protocol used for habitat assessment and the locations of measurements relative to each fish home site. 3
Current Intervals 1-5 Upstream Middle Downstream Sites at edge of habitat are indicated with an + in each table. Sites within habitat are indicated with an * in each table. 4
Table 1. Average Depth, Flow, and Difference in Inside and Outside Homesites. Avg Depth (cm) Avg (m/s) Avg Difference (m/s) 46.67 0.631 0.184 63.00 0.478 0.255 27.00 0.191-0.056 64.33 0.141-0.251 79.33 0.266-0.012 72.00 0.156-0.206 51.33 0.124-0.158 33.33 0.096-0.165 41.67 0.148-0.308 45.67 0.036-0.354 35.00 0.119-0.119 30.67 0.192-0.066 34.00 0.096-0.128 41.00 0.161-0.113 Average 47.50 0.203-0.107 Min 27.00 0.04-0.35 Max 79.33 0.63 0.26 5
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Table 2. Average Physical Conditions Associated with Brook Trout Homesites. Stream Width (meters) Stream Width (feet) Habitat Width (meters) Habitat Width (feet) Habitat Length (meters) Habitat Length (feet) Distance to shore (meters) Distance to shore (feet) #sunken logs Complexity (1-5) GR1-45* 28.3 92.8 1.4 4.5 2.4 7.7 10.0 32.8 9.0 1.0 0.0 BB1-49 11.0 36.1 1.7 5.6 4.0 13.1 0.0 0.0 2.0 5.0 0.9 BB2-46 18.0 59.0 9.0 29.5 3.3 10.7 0.0 0.0 7.0 4.0 1.0 LL1-42 15.9 52.2 4.2 13.8 6.0 19.7 0.0 0.0 6.0 2.0 1.0 LL2-42 28.5 93.5 6.0 19.7 14.2 46.6 5.0 16.4 4.0 0.0 0.0 KS-40 19.9 65.3 4.2 13.8 21.0 68.9 0.0 0.0 10.0 1.0 0.6 LL3-43 22.1 72.5 2.4 7.9 4.6 15.1 3.0 9.8 8.0 2.0 0.4 LL4-43 22.1 72.5 1.4 4.6 16.5 54.1 0.0 0.0 2.0 2.0 1.0 GR2-44 33.3 109.2 9.4 30.8 4.1 13.4 0.0 0.0 8.0 4.0 0.7 GR3-45 28.3 92.8 2.4 7.9 5.6 18.4 0.4 1.3 3.0 2.0 1.0 DF1-31 11.7 38.4 0.9 3.0 15.7 51.6 0.0 0.0 0.0 0.0 0.3 DF2-31 15.2 49.9 6.0 19.5 10.2 33.3 3.6 11.8 15.0 5.0 0.5 DNR- 33/34/35 25.1 82.3 9.3 30.5 12.8 42.0 0.0 0.0 45.0 2.0 0.3 PL1-32 9.7 31.9 3.7 12.0 6.8 22.2 0.0 0.0 9.0 4.0 0.3 PL2-34 38.2 125.1 5.7 18.5 8.4 27.5 0.0 0.0 10.0 4.0 1.0 TB1-38 11.2 36.6 4.2 13.8 13.6 44.4 0.0 0.0 8.0 3.0 0.3 TB2-37/38 9.3 30.3 4.8 15.7 1.1 3.6 2.0 6.6 10.0 4.0 0.1 Average 20.5 67.1 4.5 14.8 8.8 29.0 1.4 4.6 9.2 2.6 0.5 Min 9.3 30.3 0.9 3.0 1.1 3.6 0.0 0.0 0.0 0.0 0.0 Max 38.2 125.1 9.4 30.8 21.0 68.9 10.0 32.8 45.0 5.0 1.0 The first column includes site and structure number, and fish ID#. GR = Guide Rest; BB = Batterson Bridge; LL = Louies Landing; KS = Keystone; DF = Dam Four; DNR = DNR site; PL = Power line; TB = Twin Bridges. Thus GR1 represents structure # 1 at Guides Rest which was used by fish #45. Overhead 7
Branch: main Location: Fish ID#: 49 Upstream Upstream Interval Depth (cm) (m/s) batterson 1 deep run/root wad/undercut Middle Depth (cm) Middle (m/s) Downstream Depth (cm) Downstream (m/s) 1 49 0.137 57 0.048 40 0.029 2 65 0.072 79 0.158 76 0.197 3 40 0.160 36 0.242 52 0.230 4 67 0.708 76 0.247 46 0.479 * 5 50 0.006 40 0.368 48 0.267 Stream Width Habitat Width Habitat Length (cm) Distance to shore #sunken logs Complexity (1-5) Overhead meters 11 1.7 4 0 2 5 90% feet 36.1 5.6 13.1 0 Substrate % Stream Summary Homesite Summary Silt 0.3 Avg Depth 54.73 cm Avg Depth 63.00 cm Sand 0.7 Min Depth 36 cm Avg 0.478 m/s Gravel Max Depth 79 cm Cobble Avg 0.223 m/s Avg velocity dif 0.255 m/s Min 0.006 m/s Max 0.708 m/s 8
Branch: Main Location: Fish ID#: 46 Upstream Upstream Interval Depth (cm) (m/s) Batterson 2 island structure Middle Depth (cm) Middle (m/s) Downstream Depth (cm) Downstream (m/s) 1 26 0.184 27 0.029 21 0.027 2 35 0.419 23 0.111 23 0.044 * 3 35 0.374 43 0.485 32 0.271 4 35 0.473 39 0.510 47 0.448 5 17 0.185 30 0.065 38 0.080 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 18 9 3.3 0 7 4 0.95 feet 59 29.5 10.7 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 31.40 cm Avg Depth 27.00 cm Sand 0.8 Min Depth 17 cm Avg 0.191 m/s Gravel 0.2 Max Depth 47 cm Cobble Avg 0.247 m/s Avg velocity dif -0.056 m/s Min 0.027 m/s Max 0.510 m/s 9
Branch: Main Location: Louies Landing 1 South bank LWD/sunken raft Fish ID#: 42 Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 49 0.081 78 0.312 66 0.030 * 2 72 0.278 65 0.454 48 0.340 + 3 67 0.421 62 0.541 58 0.455 4 64 0.366 61 0.381 60 0.535 5 61 0.571 66 0.571 62 0.538 Stream Width Habitat Width Habitat Length Distance to shore 10 #sunken logs Complexity (1-5) Overhead meters 15.9 4.2 6 0 6 2 1 feet 52.2 13.8 19.7 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 62.60 cm Avg Depth 64.33 cm Sand 0.4 Min Depth 48 cm Avg 0.141 m/s Gravel 0.6 Max Depth 78 cm Cobble Avg 0.392 m/s Avg velocity dif -0.251 m/s Min 0.030 m/s Max 0.571 m/s
Branch: Main Location: Louies Landing 2 N bank pool with weedy vegetation Fish ID#: 42 Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 32 0.007 21 0.081 30 0.056 2 67 0.217 88 0.311 83 0.263 * 3 50 0.548 46 0.547 64 0.401 + 4 52 0.371 37 0.517 46 0.286 5 26 0.157 23 0.177 30 0.250 0.245 0.296 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 28.5 6 14.2 5 4 0 0 feet 93.5 19.7 46.6 16.4 Substrate % Stream Summary Homesite Summary Silt Avg Depth 46.33 cm Avg Depth 79.33 cm Sand 0.2 Min Depth 21 cm Avg 0.266 m/s Gravel 0.2 Max Depth 88 cm Cobble Avg 0.278 m/s Avg velocity dif -0.012 m/s Vegetation 0.6 Min 0.007 m/s Max 0.548 m/s 11
Branch: Main Location: Louies landing 3 sunken raft Fish ID#: 43 Interval Upstream Upstream Middle Middle Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) Downstream (m/s) 1 27 0.202 47 0.294 46 0.211 2 45 0.144 54 0.120 55 0.109 * 3 51 0.412 56 0.470 70 0.414 + 4 61 0.387 55 0.484 53 0.375 5 49 0.264 51 0.181 40 0.164 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meter 22.1 2.4 4.6 3 8 2 0.4 feet 72.5 7.9 15.1 9.8 Substrate % Stream Summary Homesite Summary Silt Avg Depth 50.67 cm Avg Depth 51.33 cm Sand Min Depth 27 cm Avg 0.124 m/s Gravel Max Depth 70 cm Cobble Avg 0.282 m/s Avg velocity dif -0.158 m/s Min 0.109 m/s Max 0.484 m/s 12
Branch: Main Location: Louies Landing 4 undercut Fish ID#: 43 Interval Upstream Upstream Middle Middle Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) Downstream (m/s) 1 40 0.164 31 0.013 29 0.111 * 2 53 0.375 45 0.270 48 0.194 + 3 70 0.414 68 0.533 53 0.356 4 55 0.109 45 0.376 53 0.333 5 46 0.211 36 0.294 40 0.168 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 22.1 1.4 16.5 0 2 2 1 feet 72.5 4.6 54.1 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 47.47 cm Avg Depth 33.33 cm Sand Min Depth 29 cm Avg 0.096 m/s Gravel Max Depth 70 cm Cobble Avg 0.261 m/s Avg velocity dif -0.165 m/s Min 0.013 m/s Max 0.533 m/s 13
Branch: Main Location: keystone deep slot/overhanging trees Fish ID#: 40 Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 69 0.109 72 0.345 75 0.013 * 2 40 0.365 55 0.299 52 0.492 + 3 45 0.556 50 0.420 52 0.530 4 42 0.495 52 0.427 55 0.454 5 40 0.341 39 0.183 33 0.393 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 19.9 4.2 21 0 10 1 0.6 feet 65.3 13.8 68.9 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 51.40 cm Avg Depth 72.00 cm Sand 0.1 Min Depth 33 cm Avg 0.156 m/s Gravel 0.9 Max Depth 75 cm Cobble Avg 0.361 m/s Avg velocity dif -0.206 m/s Min 0.013 m/s Max 0.556 m/s 14
Branch: Main Location: Guides Rest 1 - Sunken Raft Fish ID#: 45 Interval Upstream Upstream Middle Middle Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) Downstream (m/s) 1 44 0.523 44 0.789 52 0.582 * 2 44 0.614 44 0.631 48 0.573 3 45 0.521 54 0.475 58 0.337 4 48 0.456 55 0.243 34 0.295 5 33 0.313 34 0.189 32 0.176 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 28.3 1.4 2.4 10 9 1 0 feet 92.8 4.5 7.7 32.8 Substrate % Stream Summary Homesite Summary Silt Avg Depth 44.60 cm Avg Depth 46.67 cm Sand 0.3 Min Depth 32 cm Avg 0.631 m/s Gravel 0.7 Max Depth 58 cm Cobble Avg 0.448 m/s Avg velocity dif 0.184 m/s Min 0.176 m/s Max 0.789 m/s 15
Branch: main Location: Guides Rest 2 Upstream Fish ID#: 44 Interval Upstream Upstream Middle Middle Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) Downstream (m/s) 1 37 0.066 48 0.024 40 0.355 * 2 56 0.648 55 0.580 51 0.598 + 3 46 0.575 45 0.656 32 0.714 4 37 0.546 26 0.595 31 0.644 5 33 0.285 33 0.273 31 0.285 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 33.3 9.4 4.1 0 8 4 0.7 feet 109.2 30.8 13.4 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 40.07 cm Avg Depth 41.67 cm Sand 0.5 Min Depth 26 cm Avg 0.148 m/s Gravel 0.5 Max Depth 56 cm Cobble Avg 0.456 m/s Avg velocity dif -0.308 m/s Min 0.024 m/s Max 0.714 m/s 16
Branch: Main Location: Guides rest 3 downstream island structure Fish ID#: 45 Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 40 0.021 58 0.029 39 0.058 * 2 52 0.688 57 0.659 60 0.587 + 3 54 0.540 59 0.378 62 0.427 4 62 0.511 60 0.438 58 0.418 5 43 0.425 42 0.338 46 0.335 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 28.3 2.4 5.6 0.4 3 2 1 feet 92.8 7.9 18.4 1.3 Substrate % Stream Summary Homesite Summary Silt Avg Depth 52.80 cm Avg Depth 45.67 cm Sand Min Depth 39 cm Avg 0.036 m/s Gravel Max Depth 62 cm Cobble Avg 0.390 m/s Avg velocity dif -0.354 m/s Min 0.021 m/s Max 0.688 m/s 17
Branch: North Location: Twin Bridges 1- dock structure Fish ID#: 38 West side of river area above and below dock with cobble piles and a few small logs Upstream Upstream Middle Middle Downstream Downstream Interval Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 38 0.127 45 0.231 40 0.125 West* 2 42 0.191 48 0.451 48 0.188 3 45 0.256 46 0.377 45 0.255 4 40 0.365 40 0.120 44 0.455 5 40 0.536 31 0.077 34 0.349 East Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 11.2 4.2 13.6 0 8 3 0.3 feet 36.6 13.8 44.4 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 41.73 cm Avg Depth 41.00 cm Sand 0.2 Min Depth 31 cm Avg 0.161 m/s Gravel 0.5 Max Depth 48 cm Cobble 0.3 Avg 0.274 m/s Avg velocity dif -0.113 m/s Min 0.077 m/s Max 0.536 m/s 18
Branch: North Location: Twin Bridges 2 submerged raft Fish ID#: 37/38 Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 40 0.186 68 0.268 44 0.133 West 2 56 0.232 71 0.239 58 0.076 3 61 0.300 71 0.204 54 0.076 4 64 0.197 72 0.048 79 0.204 5 58 0.242 46 0.081 71 0.403 East Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 9.3 4.8 1.1 2 10 4 0.1 feet 30.3 15.7 3.6 6.6 Substrate % Stream Summary Homesite Summary Silt Avg Depth 60.87 cm Avg Depth 50.67 cm Sand 0.4 Min Depth 40 cm Avg 0.196 m/s Gravel 0.45 Max Depth 79 cm Cobble 0.15 Avg 0.193 m/s Avg velocity dif 0.003 Min 0.048 m/s Max 0.403 m/s 19
Branch: North Location: Powerline 1 - hook a brook lodge Fish ID#: 32 undercut bank with small overhanging tree and some LWD Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 37 0.157 28 0.204 27 0.216 West* 2 31 0.180 32 0.246 32 0.345 3 29 0.295 38 0.219 28 0.352 4 28 0.251 38 0.240 28 0.375 5 22 0.255 37 0.273 28 0.274 East Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 9.7 3.7 6.8 0 9 4 0.3 feet 31.9 12 22.2 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 30.87 cm Avg Depth 30.67 cm Sand 0.15 Min Depth 22 cm Avg 0.192 m/s Gravel 0.85 Max Depth 38 cm Cobble Avg 0.259 m/s Avg velocity dif -0.066 m/s Min 0.157 m/s Max 0.375 m/s 20
Branch: North Location: Powerline 2 downstream Fish ID#: 34 Submerged logs and gravel depression underneath overhanging shrubbery Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 39 0.098 37 0.117 26 0.074 West* 2 33-0.016 15 0.081 14 0.167 3 41 0.416 47 0.460 45 0.552 4 27 0.028 19 0.088 21 0.273 5 27 0.286 42 0.269 21 0.471 East Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 38.2 5.7 8.4 0 10 4 0.98 feet 125.1 18.5 27.5 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 30.27 cm Avg Depth 34.00 cm Sand 0.5 Min Depth 14 cm Avg 0.096 m/s Gravel 0.95 Max Depth 47 cm Cobble Avg 0.224 m/s Avg velocity dif -0.128 m/s Min -0.016 m/s Max 0.552 m/s 21
Branch: North Location: DNR submerged structure along west bank Fish ID#: 33/34/35 Interval Upstream Upstream Middle Middle Downstream Downstream Depth Depth Depth (cm) (cm) (m/s) (cm) (m/s) (m/s) 1 31 0.087 41 0.154 33 0.117 West* 2 24 0.273 44 0.090 35 0.137 3 28 0.176 35 0.078 45 0.201 4 35 0.430 39 0.481 39 0.364 5 27 0.439 27 0.253 21 0.289 East Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 25.1 9.3 12.8 0 45 2 0.3 feet 82.3 30.5 42 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 33.60 cm Avg Depth 35.00 cm Sand 0.7 Min Depth 21 cm Avg 0.119 m/s Gravel 0.3 Max Depth 45 cm Cobble Avg 0.238 m/s Avg velocity dif -0.119 m/s Min 0.078 m/s Max 0.481 m/s 22
Branch: North Location: Fish ID#: 31 Upstream Upstream Interval Depth (cm) (m/s) Dam Four 1 undercut riffle/bank/eddy/tag Middle Depth (cm) Middle (m/s) Downstream Depth (cm) Downstream (m/s) 1 27 0.012 31 0.062 34 0.022 * 2 28 0.707 51 0.869 63 0.209 + 3 28 1.089 53 0.645 71 0.879 4 27 1.056 23 0.735 39 0.354 5 18 0.556 14 0.504 19 0.209 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 11.7 0.9 15.7 0 0 0 0.3 feet 38.4 3 51.6 0 Substrate % Stream Summary Homesite Summary Silt Avg Depth 35.07 cm Avg Depth 30.67 cm Sand 0.3 Min Depth 14 cm Avg 0.032 m/s Gravel 0.2 Max Depth 71 cm Cobble 0.5 Avg 0.527 m/s Avg velocity dif -0.495 m/s Min 0.012 m/s Max 1.089 m/s 23
Branch: North Location: Fish ID#: 31 Upstream Upstream Interval Depth (cm) (m/s) Dam Four 2 East Side log jam after convergence of two channels Middle Depth (cm) Middle (m/s) Downstream Depth (cm) Downstream (m/s) 1 49 0.223 26 0.062 27 0.123 west 2 88 0.521 46 0.103 74 0.470 3 42 0.133 92 0.376 103 0.484 4 30-0.047 86 0.141 68 0.217 5 26 0.041 35 0.044 51 0.027 east 0.419 0.455 0.436 0.069 Stream Width Habitat Width Habitat Length Distance to shore #sunken logs Complexity (1-5) Overhead meters 15.2 5.9 10.2 3.6 15 5 0.5 feet 49.9 19.5 33.3 11.8 Substrate % Stream Summary Homesite Summary Silt Avg Depth 56.20 cm Avg Depth 34.00 cm Sand 0.2 Min Depth 26 cm Avg 0.136 m/s Gravel 0.8 Max Depth 103 cm Cobble Avg 0.226 m/s Avg velocity dif -0.090 Min -0.047 m/s Max 0.521 m/s 24
Main Branch Au Sable River Brook Trout Locations Note: Due to the level of resolution available with handheld GPS units, some locations are positioned on the imagery background a few feet from their true locations. Red markers in the homesite images indicate the specific structure identified by the description; yellow circles delineate the locations used to determine a homesite. Average length-at-capture: 242.6 mm Maximum length-at-capture: *297 mm Minimum length-at-capture: 199 mm Average weight-at-capture: 164.1 grams Maximum weight-at-capture: *280 grams Minimum weight-at-capture: 50 grams Distance along the thalweg between furthest upstream and downstream location for each fish was calculated using the measuring tool in GIS Average: 241.75 meters Maximum: 567.17 meters Minimum: 46.14 meters * Fish was lost after tagging 25
Fish #40 Keystone Landing Date of capture: 6/19/14 Length-at-capture: 228 mm Weight-at-capture: 115 grams Upstream/Downstream Distance: 65.06 meters All locations All day locations (highlighted) 26
All night locations (highlighted) All locations with dates 27
Homesites X = overhanging tree below slide upstream of keystone, + = fallen tree upstream of keystone 28
Fish #42 Keystone Landing, Louies Landing Date of capture: 6/19/14 Length-at-capture: 279 mm Weight-at-capture: 255 grams Upstream/Downstream Distance: 567.17 meters All locations All day locations (highlighted) 29
All night locations (highlighted) All locations with dates 30
Homesites downstream of Louies Landing X = submerged structure north side, + = overhanging cedar south side All 24 hour track locations (highlighted) 31
Fish #43 Louies Landing Date of capture: 6/20/14 Length-at-capture: 261mm Weight-at-capture: 261 grams Upstream/Downstream Distance: 138.37 meters All locations All day locations (highlighted) 32
All night locations (highlighted) All locations with dates 33
Homesites X = undercut/overhanging tree, + = sunken raft/lwd All 24 hour track locations (highlighted) 34
Fish #44 Guides Rest Date of capture: 6/21/14 Length-at-capture: 247 mm Weight-at-capture: 180 grams Upstream/Downstream Distance: 146.69 meters All locations Day locations (highlighted) 35
Night locations (highlighted) All locations with dates 36
Homesite X = 2 nd LWD upstream of guides rest All 24 hour locations (highlighted) 37
Fish #45 Guides Rest Date of capture: 6/21/14 Length-at-capture: 233 mm Weight-at-capture: 130 grams Upstream/Downstream Distance: 54.33 meters All locations All day locations (highlighted) 38
All night locations (highlighted) All locations with dates 39
Homesites X = undercut/island downstream of guides rest, + = submerged log S side across from Guides Rest All 24 hour track locations (highlighted) 40
Fish #46 Batterson Bridge Date of capture: 7/9/14 Length-at-capture: 245 mm Weight-at-capture: 175 grams Upstream/Downstream Distance: 464.06 meters All locations 41
All day locations (highlighted) 42
All night locations (highlighted) 43
All locations with dates 44
Homesites - * = overhanging tags/submerged LWD upstream of burnt house, + = Island structure with grass on top above burnt house, X = LWD on W side of river 45
All 24 hour track locations (highlighted) 46
Fish #47 Batterson Bridge Date of capture: 7/9/14 Length-at-capture: 234 mm Weight-at-capture: 145 grams Upstream/Downstream Distance: 154.74 meters All locations 47
All day locations (highlighted) 48
All night locations (highlighted) 49
All locations with dates 50
Homesites X = sweeper below first dock, + = tags on E side of river, * = tags on E side of river 51
All 24 hour track locations (highlighted) 52
Fish #48 Batterson Bridge Date of capture: 7/9/14 Length-at-capture: 203 mm Weight-at-capture: 50 grams Upstream/Downstream Distance: 539.21 meters All locations. Arrows identify most upstream and downstream locations. 53
All day locations (highlighted) 54
All night locations (highlighted) 55
All locations with dates 56
Homesites - += below burnt house, X = sweeper below burnt house 57
Fish #49 Batterson Bridge Date of capture: 7/9/14 Length-at-capture: 199 mm Weight-at-capture: 50 grams Upstream/Downstream Distance: 46.14 meters All locations 58
All day locations (highlighted) All night locations (highlighted) 59
All locations with dates Homesites X = deep run, + = rootmass/fallen tree above deep run 60
All 24 hour track locations (highlighted) 61
North Branch Au Sable River Brook Trout Locations Note: Due to the level of resolution available with handheld GPS units, some locations are positioned on the imagery background a few feet from their true locations. Red markers in the homesite images indicate the specific structure identified by the description; yellow circles delineate the locations used to determine a homesite. Average length-at-capture: 250.7 mm Maximum length-at-capture: 310 mm Minimum length-at-capture: 208 mm Average weight-at-capture: 192 grams Maximum weight-at-capture: 365 grams Minimum weight-at-capture: 100 grams Distance along the thalweg between furthest upstream and downstream location for each fish was calculated using a measuring tool in GIS Average: 387.61 meters Maximum: 835.54 meters Minimum: 32.19 meters 62
Fish #31 Dam Four Date of capture: 6/24/14 Length-at-capture: 223 mm Weight-at-capture: 130 grams Upstream/Downstream Distance: 787.07 meters All locations 63
Day locations (highlighted) 64
All night locations (highlighted) 65
All locations with dates 66
Zoom of locations with dates 67
Home sites (5+ tracks) 68
Fish #32 Upstream from NDNR/Powerlines Date of capture: 6/25/14 Length-at-capture: 208 mm Weight-at-capture: 100 grams Upstream/Downstream Distance: 109.14 meters All Locations 69
All day locations (highlighted) 70
All night locations (highlighted) 71
Locations with dates 72
Homesites X = underneath willow, + = Single log in front of Hook-a-brook lodge 73
Fish #33 North DNR/ Copper Fisherman Date of capture: 6/25/14 Length-at-capture: 244 mm Weight-at-capture: 160 grams Upstream/Downstream Distance: 320.73 meters All Locations 74
All day locations (highlighted) All night locations (highlighted) 75
Locations with dates 76
Zoom of locations with dates 77
Homesites X = submerged logs, + = island structure 24 Hour track locations (highlighted) 78
Fish #34 North DNR/ Copper Fisherman Powerlines Date of capture: 6/25/14 Length-at-capture: 310 mm Weight-at-capture: 365 grams Upstream/Downstream Distance: 835.54 meters All Locations 79
Day locations (highlighted) upstream of copper fisherman 80
Day locations (highlighted) downstream of powerlines 81
Night locations (highlighted) upstream of copper fisherman Night locations (highlighted) downstream of powerlines 82
All locations with dates 83
Zoom of locations with dates downstream of powerlines 84
Homesite Submerged logs upstream of copper fisherman 85
Homesite downstream of powerlines 86
Fish #35 NDNR/Copper Fisherman, Lovells Tavern Date of capture: 6/25/14 Length-at-capture: 239 mm Weight-at-capture: 170 grams Upstream/Downstream Distance: 583.43 meters All locations. Red arrow indicates farthest downstream location. 87
Day locations (highlighted) All night locations (highlighted) 88
Locations with dates Zoom of locations upstream of Lovells Tavern with dates 89
Homesite Submerged logs upstream of copper fisherman 24 Hour track locations (highlighted) 90
Fish #37 Upstream of Twin Bridges Date of capture: 6/26/14 Length-at-capture: 309 mm Weight-at-capture: 320 grams Upstream/Downstream Distance: 354.76 meters All locations. Red arrow indicates farthest upstream location. 91
All day locations (highlighted) All night locations (highlighted) 92
All locations with dates Homesite submerged raft upstream of Twin Bridges 93
24 Hour track locations (highlighted) 94
Fish #38 Upstream of Twin Bridges Date of capture: 6/26/14 Length-at-capture: 214 mm Weight-at-capture: 100 grams Upstream/Downstream Distance: 78.03 meters All locations All day locations (highlighted) 95
All night locations (highlighted) All locations with dates 96
Homesites X = Submerged raft upstream of Twin Bridges, + = first dock W side upstream of Twin Bridges 24 hour track locations (highlighted) 97
Fish #39 Upstream of Twin Bridges Date of capture: 6/26/14 Length-at-capture: 240 mm Weight-at-capture: 160 grams Upstream/Downstream Distance: 32.19 meters All locations All day locations (highlighted points) 98
All night locations (highlighted points) Locations with dates 99
24 Hour track locations (highlighted) 100
101
Air temperature recorded at Gate s Lodge. 102
Water temperature recorded at Guide s Rest. 103
Water temperature recorded at Gates Lodge. 104
Water temperature recorded at Shaw Park. 105
Water temperature recorded at Wakeley Bridge. 106
Water temperature recorded at Twin Bridge. 107
Water temperature recorded at Townline. 108
Water temperature recorded at DNR Access. 109
Water temperature recorded at Dam 4. 110
Water temperature recorded at Sheep Pasture. 111
Water temperature recorded at Kellogg Bridge. 112