ADULT SALMONID MONITORING IN THE LAGUNITAS CREEK WATERSHED

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1 ADULT SALMNID MNITRING IN THE LAGUNITAS CREEK WATERSHED Eric Ettlinger, Aquatic Ecologist, Marin Municipal Water District Gabriela Guaiumi, Watershed Stewards Program Member In association with the National Park Service, Point Reyes National Seashore and the Salmon Protection and Watershed Network SPAWN) January 2019

2 Contact Information: Address: Marin Municipal Water District, 220 Nellen Avenue, Corte Madera, CA Phone: 415) Acknowledgements The Marin Municipal Water District MMWD) would like to thank the National Park Service, California State Parks, and the private land owners in the watershed for granting us access onto their properties to conduct this monitoring. Cover Photo: Gabriela Guaiumi and Justine Brumm WSP) measuring a redd in Lagunitas Creek, Marin County, 2017

3 TABLE F CNTENTS EXECUTIVE SUMMARY... 1 INTRDUCTIN... 1 Salmonids of the Lagunitas Creek Watershed... 1 Location and rganizations... 2 METHDS... 4 RESULTS... 5 DISCUSSIN... 6 REFERENCES... 8 TABLES AND FIGURES Table 1. Flow requirements on Lagunitas Creek at S.P. Taylor State Park... 3 Table 2. bservations of coho salmon, spawning season Table 3. Coho redds in the Lagunitas Creek Watershed Table 4. bservations of steelhead, spawning season Table 5. bservations of pink salmon, spawning season Table 6. bservations of Chinook salmon, spawning season Table 7. bservations of chum salmon, spawning season Figure 1. Salmonid redds in the Lagunitas Creek Watershed, Figure 2. Coho redds in the Lagunitas Creek Watershed Figure 3. Steelhead redds in the Lagunitas Creek Watershed Figure 4. Rain and Lagunitas Creek Stream Flow, Spawning Season Figure 5. Salmonid redds and Lagunitas Creek stream flow, Figure 6. Redd Areas by Species in Lagunitas and San Geronimo Creeks, i

4 EXECUTIVE SUMMARY Adult salmonid surveys were conducted by staff and volunteers of the Marin Municipal Water District MMWD), National Park Service NPS), Salmon Protection and Watershed Network SPAWN), and the Watershed Stewards Program WSP). Surveys were conducted on the main stem of Lagunitas Creek and four tributaries: San Geronimo Creek, Devil s Gulch, Cheda Creek, and lema Creek. These annual surveys are intended to document the spawning run of coho salmon ncorhynchus kisutch), while also collecting data on steelhead trout. mykiss), Chinook or king salmon. tshawytscha) and chum salmon. keta). Pink salmon. gorbuscha) were also documented in Lagunitas Creek for the first time. MMWD surveys began on ctober 24, 2017 and ended on March 28, This year, 110 coho redds and 463 live coho were observed in the Lagunitas Creek Watershed. Jacks comprised a record 55% of the live coho observed by MMWD and WSP personnel. The official coho escapement estimate was only 220, based on a conservative assumption of two spawners per redd, and was less than half the average observed since ver 60% of observed coho spawning this year occurred in Lagunitas creek, where 72 redds were observed. San Geronimo Creek, Devil s Gulch, and lema Creek contributed a total of 31 redds. Cheda Creek and the small tributaries to San Geronimo Creek contributed seven redds total. The steelhead run was above average with 166 redds and 204 live fish observed. The steelhead escapement was 332 adults, based on an assumption of two spawners per redd. For the first time in our 20+ years of conducting annual spawner surveys, pink salmon were observed in Lagunitas Creek: 13 live fish and 30 redds were documented. In addition, 27 live Chinook and 22 Chinook redds were observed, as well as six live chum salmon and two chum redds. INTRDUCTIN Salmonids of the Lagunitas Creek Watershed Two species of salmonids are found in the Lagunitas Creek Watershed year-round: coho salmon ncorhynchus kisutch) and steelhead. mykiss). Adult Chinook or king salmon. tshawytscha) are observed spawning in most years, while chum salmon. keta) are observed in a minority of years. This year, pink salmon. gorbuscha) became the fifth salmonid species to be documented in Lagunitas Creek. Coho salmon and steelhead populations in the watershed have fluctuated widely since 1970 and are significantly reduced from anecdotal reports of large historic populations. Throughout California, populations of native fish species, including coho and steelhead, have been steadily 1

5 declining. Human-caused factors for this decline include habitat alterations such as water diversions, road building, timber harvest, urbanization, flood control structures and practices, and climate change NMFS 2012). This decline resulted in the listing of coho salmon in the Central California Coast Evolutionarily Significant Unit ESU) as endangered under federal and California Endangered Species Acts. Steelhead are listed as federally threatened. Coho salmon and steelhead are anadromous fishes, rearing at least partially in freshwater, migrating to the ocean as smolts, spending their adult life in the ocean, and then migrating back into freshwater streams to spawn. Most coho salmon from California streams spend approximately 18 months in freshwater including incubation) and 18 months in the ocean, returning to spawn in their natal stream in their third year, after which they die Shapalov and Taft 1954, Moyle 2002). They can be grouped into year classes of three-year increments. For example, the spawners were the progeny of spawners in and are considered to be in the same year class. Spawning years with relatively poor reproductive success can result in poor spawning runs three years later. While the majority of coho return as three-year-old fish, some males, called jacks, spend less than a year in the ocean before becoming sexually mature and returning to their natal stream to spawn at two years of age Sandercock 1991). Spawning coho begin to arrive near the mouth of Lagunitas Creek in early fall to begin acclimation to freshwater before migrating upstream Bratovich and Kelley 1988). The spawning period is generally from mid- November to mid-january but adult coho have been observed from late-ctober to late- February. The life history of steelhead is more flexible than that of coho salmon. Steelhead generally spend one to three years in freshwater and one or two years in the ocean before returning to spawn, although the most common life history pattern is to spend two years in fresh water and one year in the ocean Shapalov and Taft 1954). Unlike coho, steelhead can return to the ocean after spawning and spawn multiple times. This flexibility means that steelhead do not show strong year class patterns in their spawning runs. Steelhead are generally first observed in Lagunitas Creek in late December or early January and continue spawning through April or even into May. Coho salmon and steelhead usually spawn at the heads of riffles with gravel substrate Moyle 2002). Females may excavate small test pits in the gravel substrate before deciding on a site to lay their eggs. nce decided, the female will dig a larger pit called a redd ) where she deposits her eggs. ften more than one adult male will fertilize the eggs by releasing milt before the female covers the eggs with additional gravel Moyle 2002). Following spawning, female coho may guard the redd for up to four weeks before dying, while steelhead attempt to return to the ocean. Location and rganizations Lagunitas Creek originates on the north slope of Mount Tamalpais and flows in a northwesterly direction for 40 km to Tomales Bay Figure 1). The lower 19 km is accessible to anadromous salmonids. San Geronimo Creek, Devil s Gulch, Nicasio Creek, and lema Creek are the major 2

6 tributaries to Lagunitas Creek. Devil s Gulch, which flows through National Park and State Park land before entering Lagunitas Creek, is the smallest of these tributaries. It has perennial surface flows and good salmonid habitat characteristics that make it an important coho spawning stream. ther tributaries to Lagunitas Creek include Cheda Creek, which supports coho spawning, and McIsaac Creek, where coho have not been seen in many years. The tributaries to San Geronimo Creek that provide coho spawning habitat include Arroyo, Evans, Larsen, Montezuma and Woodacre Creeks. Fifty-two percent of the land within the Lagunitas Creek watershed is publicly owned by the Marin Municipal Water District, the National Park Service, California Department of Parks and Recreation, and the Marin County pen Space District. MMWD is a public agency that withdraws water from the Lagunitas Creek basin in order to provide water to residents of central and southern Marin County. MMWD operates four reservoirs on the mainstem of Lagunitas Creek and a fifth reservoir on Nicasio Creek. MMWD releases water from Kent Lake to ensure year-round minimum stream flows in Lagunitas Creek Table 1). In addition, MMWD releases periodic upstream migration flows, which are intended to facilitate passage of anadromous fish through shallow areas in the creek, and are required on November 15, December 1, January 1, and February 1 in the absence of a natural storm event preceding those dates. MMWD Fisheries staff conduct surveys on Lagunitas Creek, San Geronimo Creek, and Devil s Gulch. Surveys on lema Creek and Cheda Creek are conducted by NPS staff working for Point Reyes National Seashore and the Inventory and Monitoring Program. AmeriCorps members working for The Watershed Stewards Program WSP) assist NPS and MMWD staff with their survey work. SPAWN staff and volunteers conduct spawner surveys in five tributaries to San Geronimo Creek, as well as the headwater section of San Geronimo Creek upstream of Woodacre Creek. Table 1. Flow requirements on Lagunitas Creek at S.P. Taylor State Park. Time Period Normal Year Flow cfs) Dry Year Flow cfs) November 115* - December January 1 - March March 16 - March April 1 - April May 1 - June June 16 - November 8 6 * The minimum flow of 20 cubic feet per second cfs) in November is to begin following the first storm that produces a trigger flow of 25 cfs at the USGS gage at S.P. Taylor State Park. In the absence of a storm causing a trigger flow, the 20-cfs requirement becomes effective on November 15 of each year. 3

7 METHDS MMWD fisheries staff and WSP members walked sections of creek once per week between ctober 24, 2017 and March 28, Lagunitas Creek was divided into three sections for weekly surveys Figure 1): Tocaloma Bridge to Devil s Gulch 4.0 km), Devil s Gulch to Shafter Bridge 4.8 km), and Shafter Bridge to Peters Dam 0.8 km). The section of Lagunitas Creek from Tocaloma Bridge downstream to the confluence of Nicasio Creek was surveyed. In Devil s Gulch, MMWD biologists surveyed from the mouth to a bedrock cascade approximately three km upstream, which is impassable to coho. We also surveyed a 400 m fork of Devil s Gulch near the upstream end of our survey reach. San Geronimo Creek was walked in two sections: from its confluence with Lagunitas Creek to Meadow Way Bridge 3.8 km) and from Meadow Way Bridge to the confluence of Woodacre Creek 3.4 km). Each stream section was surveyed from the downstream end to the upstream end, with the exception of the sections of Lagunitas Creek downstream of Tocaloma, which were surveyed in a downstream direction using float tubes for the deep sections. Surveyors recorded observations of redds, live adult salmonids, salmonid carcasses, and test i.e. incomplete) redds. Live fish were recorded as male, female, jack, or unknown. Their behavior, condition color, wear marks, pronounced kype, etc.), and their location in relation to landmarks such as tributaries or bridges were noted. All observed spawning activity was also recorded. MMWD surveyors collected otoliths from carcasses for subsequent life history analyses and tissue samples for genetic analyses by UC Berkeley and the National Marine Fisheries Service NMFS), respectively. We attempted to determine if female salmonids had spawned by inspecting for retained eggs. ther information recorded during each survey included survey start and stop times, weather conditions, and qualitative observations of stream flow, water clarity, and water visibility. We intended to collect heads from hatchery origin Chinook salmon, in order to retrieve coded-wire tags, although no carcasses with clipped adipose fins were found. Redds were classified as having been constructed by one of the salmonid species or recorded as unknown. Redds were considered to have been conclusively built by one of these species when an identified fish was observed on the redd, or when only one species was present in the creek e.g., steelhead after January). When fish were not present, redds were classified based on their area, shape, depth, substrate, location, andor time of year. When coho were present in the creek, large redds with wide pits were classified as coho redds. Smaller redds with deep pits and sharp margins were generally classified as steelhead redds after the first live steelhead were observed. Unoccupied redds observed at a time when multiple salmonid species were in the creek and not displaying obvious distinguishing characteristics were classified as 4

8 unknown. Redd classification was evaluated at the end of the season by reviewing field notes for unoccupied redds and by comparing redd dimensions of occupied and unoccupied redds. MMWD surveyors assigned a unique number to each redd and marked its location in the field by hanging colored tape orange this year) on adjacent vegetation. Redds were marked this way so no redd would be double-counted during subsequent surveys and so any additional redds near that site could be distinguished. Flagging was labeled with the date, the redd number, red dimensions, and the position of the redd with respect to the channel i.e. mid-channel, left- or right-bank, etc). The flag was hung in line with the upstream end of the redd pit, so further enlargement of the redd would be conspicuous during subsequent surveys. If it was determined that a female made a small test pit and not a redd, the site was recorded as a test redd and flagged with yellow flagging. We also mapped each redd with a hand-held GPS. We measured the maximum length and width of all redds unless fish were actively constructing the redd or displaying spawning behavior. To avoid disturbing fish we hung yellow flagging, in addition to the colored flagging, next to occupied redds as a reminder to measure the redd at a later date. We attempted to identify when redds appeared to have been built on or overlapping older redds. High levels of such superimposition can indicate a shortage of adequate spawning habitat. Superimposition can kill eggs deposited in the first redd through physical shock, exposure, displacement into less favorable incubation conditions, or predation Burgner 1991). We had no way of positively determining if we were recounting the same fish during subsequent surveys or missing fish during the intervals between surveys. Most surveys on each section were conducted between five and eight days apart. In addition, an attempt was made to quantify double-counted fish after the survey season had ended. bservations of fish on redds over multiple surveys were subtracted from the total, as were schools of fish observed holding in the same pool over multiple surveys. Even with these efforts, we acknowledge that some fish were almost certainly counted multiple times. For this reason, adult escapement was estimated based on an assumption of two spawners per redd. The marine survival rate for coho salmon was calculated as the escapement estimate divided by the previous year s coho smolt emigration estimate e.g., escapement 2016 smolt emigration). RESULTS A total of 110 coho redds and 463 live coho were observed during spawner surveys in the Lagunitas Creek Watershed Table 2). The coho redd count was less than half of average and a decline of 25% from three years prior Figure 2). The minimum escapement was 220, based on the assumption of two spawners per redd. ver 60% of observed coho spawning this year occurred in Lagunitas Creek Table 3). San Geronimo Creek contributed 12%, Devil s Gulch 10%, 5

9 and lema Creek contributed 6%. San Geronimo tributaries and Cheda Creek contributed a combined 6%. Jacks comprised a record 55% of the coho spawners this season. Steelhead redds were more numerous than coho redds and more numerous than average Figure 3). A total of 166 steelhead redds were observed Table 4), equivalent to an escapement of 302 steelhead, while 204 live steelhead were observed. f the steelhead redds observed, 55% were in Lagunitas Creek, 24% were in San Geronimo Creek, 16% were in lema Creek, and 4% were in Devil s Gulch. Chinook, chum, and pink salmon were also documented in Lagunitas Creek this season. Surveyors documented 13 live pink salmon, and 30 pink redds Table 5); 27 live Chinook and 22 Chinook redds Table 6); and six live chum and two chum redds Table 7). MMWD surveyors could not determine the origin of 34 redds 11% of MMWD redds). MMWD surveyors found 22 coho carcasses, four steelhead carcasses, and one Chinook carcass. perculum and fin clip samples were harvested from 11 of the coho carcasses and one of the steelhead carcasses. These will be sent to the NMFS lab in Santa Cruz for genetic analysis. toliths were harvested from ten of the coho and will be sent to the University of California at Berkeley for analysis. DISCUSSIN The coho spawning run was surprisingly small given the large number of smolts that emigrated from Lagunitas Creek in nly 2.1% of those smolts appear to have survived, making their survival rate in the ocean one of the lowest documented. The other surprise was the extraordinary number of coho jacks observed. Shapovalov and Taft 1954) reported that over an eight-year period 18% of coho spawners returned a year earlier than the rest of their cohort i.e., as jacks). This suggests that the 219 jacks observed in may have simply been the first 18% of their cohort to spawn, with the remaining 1,000 adult coho returning in That would be the largest spawning run seen since The above-average steelhead run was an enormous improvement over the small numbers observed in A large part of that improvement may be related to dry weather conditions that allowed surveyors to be in the creeks during 26 days in January through March Figure 4). During that same period in 2017 surveys were conducted on only nine days. Steelhead redd trends are clearly influenced by weather and stream flow conditions, and may provide a distorted picture of the steelhead population. This was the first year when five species of salmonids were observed in Lagunitas Creek Figure 5). The appearance of pink salmon may be related to increased hatchery production of pinks 6

10 and poor ocean conditions in the Pacific Northwest Peter Moyle, pers. comm., ). Some of these fish may have traveled south in search of food before detecting flows coming out of Lagunitas Creek. f the 30 redds identified as pink salmon redds, seven were occupied and another seven were found before other salmonids were observed. The remaining 16 redds were classified by their small size Figure 6), and were all observed before steelhead spawning began. Adult Chinook salmon were seen for the fifth year in a row, and the 22 redds observed were more than average. nly five of those redds were occupied by Chinook, six were large and constructed before coho began spawning, and another five were larger than all but the largest coho redds. The remaining six unoccupied redds were classified as Chinook redds only after an unusually large Chinook smolt outmigration from Lagunitas Creek in the spring. This year s 4,400 Chinook smolts provided additional evidence that some of the large, unoccupied redds observed in December had likely been constructed by Chinook. Chum salmon were observed for the fourth time in the last six years, and the six fish seen were the most since Unoccupied redds that were built when multiple species were observed and that didn t have clearly distinguishable features remained unclassified Unknown ). Most of the 34 unclassified redds were observed in early December and early January, when Chinook and coho, and later coho and steelhead, were present at the same time. MMWD spawner surveys were discontinued after March 28, when we began the 2018 smolt monitoring season. Steelhead spawning peaked in early March, but spawning may have continued into May. Evidence for this came in the form of 11 adult steelhead that were captured in MMWD s smolt trap between late-march and mid-may. These numbers are small compared to the more than 200 steelhead observed during spawner surveys, and any late steelhead spawning was likely a small component of the run. Preliminary results of the 2018 juvenile salmonid survey indicate that coho survival from incubation through summer was high, turning a below-average run into a roughly average juvenile coho population. The large steelhead run translated into one of the largest juvenile steelhead populations on record. 7

11 REFERENCES Bratovich, P.M. and D.W. Kelley Investigations of salmon and steelhead in Lagunitas Creek, Marin County, California. Report prepared for Marin Municipal Water District. Burgner, R.L Life History of Sockeye Salmon. p.22 in: C. Groot and L. Margolis eds.) Pacific salmon life histories. University of British Columbia Press, Vancouver. Moyle, P.B Inland fishes of California. University of California Press., Berkeley, CA. 502pp. Moyle, P.B. Personal communication. ctober 11, National Marine Fisheries Service NMFS) Recovery Plan for the Evolutionary Significant Unit of Central California Coast Coho Salmon. Sandercock, F.K Life History of Coho Salmon. in C. Groot, and L. Margolis eds.). Pacific salmon life histories. University of British Columbia Press, Vancouver. Shapovalov, L. and A.C. Taft The life histories of the steelhead Salmo gairdneri gairdneri) and silver salmon ncorhynchus kisutch) with special references to Waddell Creek, California, and recommendations regarding their management. Calif. Fish and Game Bulletin pp. + apps. 8

12 Table 2. bservations of Coho Salmon in the Lagunitas Creek Watershed, Spawning Season CH SALMN IN LAGUNITAS CREEK SURVEY DATE Pt Reyes Station-Nicasio Cr. Nicasio Creek-Tocaloma Tocaloma-Devil's Gulch Devil's Gulch-Shafter Bridge Shafter Bridge-Peters Dam TTAL Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds 24-ct ct Nov Nov Nov Nov Nov Nov Nov Nov Dec Dec Dec Dec Dec Dec Dec Dec Dec Jan Jan Jan Jan Jan Jan Jan Jan Jan Feb Feb Feb Feb Feb Feb Mar SUBTTAL Corrected* CH SALMN IN SAN GERNIM CREEK CH SALMN CH SALMN SURVEY DATE Mouth-Meadow Way Meadow Way-Woodacre Cr. Tributaries 1 IN DEVIL'S GULCH IN LEMA CREEK 2 TTAL Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds Live Coho Carcasses Redds 14-Nov Nov Nov Dec Dec Dec Jan Jan Jan Jan Jan Jan Jan Jan Jan Jan Feb Feb Feb Mar Mar SUBTTAL Corrected* CH SALMN IN THER TRIBUTARIES Notes: CHEDA CREEK ) Indicates that the spawner survey did not cover the area on that date. * Corrected coho observations compensate for coho that were presumably double counted. CH TTAL Data provided by the Salmon Protection and Watershed Network SPAWN). 2 Data provided by the National Park Service. 9

13 Table 3. Coho Redds in the Lagunitas Creek Watershed Years Lagunitas Creek San Geronimo Creek San Geronimo Tributaries Devil's Gulch Cheda and Nicasio Creeks lema Creek Total No Data 27 No Data No Data No Data 10 No Data No Data No Data 41 No Data No Data No Data Coho year class Mean Notes: lema Creek & Cheda Creek data are provided by the National Park Service. San Geronimo tributaries: Arroyo Creek, Larsen Creek, Evans Canyon, Woodacre Creek, and San Geronimo Creek above Woodacre Creek; data provided by SPAWN. 10

14 Table 4. bservations of steelhead in the Lagunitas Creek watershed, spawner season SURVEY DATE STEELHEAD IN LAGUNITAS CREEK Pt Reyes Station-Nicasio Cr. Nicasio Creek - Tocaloma Tocaloma-Devils Gulch Devils Gulch-Shafter Bridge Shafter Bridge-Peters Dam Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds 27-Dec Dec Jan Jan Jan Jan Jan Jan Jan Feb Feb Feb Feb Feb Mar TTAL SUBTTAL Corrected* SURVEY DATE STEELHEAD IN SAN GERNIM CREEK STEELHEAD STEELHEAD Mouth-Meadow Way Meadow Way-Woodacre Cr. Tributaries 1 IN DEVIL'S GULCH IN LEMA CREEK 2 Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds Steelhead Carcasses Redds 11-Jan Jan Jan Jan Jan Jan Jan Jan Feb Mar Mar Mar Mar TTAL SUBTTAL Corrected* Notes: -) Indicates that the spawner survey did not cover the area on that date. CHEDA CREEK 2 STEELHEAD IN THER TRIBUTARIES * Corrected coho observations compensate for coho that were presumably double counted. Data provided by the Salmon Protection and Watershed Network SPAWN). STEELHEAD TTAL Data provided by the National Park Service. Incidental observation. 11

15 Table 5. bservations of pink salmon in the Lagunitas Creek watershed, spawner season SURVEY DATE PINK SALMN IN LAGUNITAS CREEK Pt Reyes Station-Nicasio Cr. Nicasio Creek - Tocaloma Tocaloma-Devils Gulch Devils Gulch-Shafter Bridge Shafter Bridge-Peters Dam Pink Carcasses Redds Pink Carcasses Redds Pink Carcasses Redds Pink Carcasses Redds Pink Carcasses Redds Pink Carcasses Redds 24-ct ct Nov Nov Nov Nov Nov Dec Dec TTAL SUBTTAL Corrected* PINK TTAL Table 6. bservations of Chinook salmon in the Lagunitas Creek watershed, spawner season SURVEY DATE Pt Reyes Station-Nicasio Cr. Nicasio Creek - Tocaloma CHINK IN LAGUNITAS CREEK Tocaloma-Devil's Gulch Devil's Gulch-Shafter Bridge Shafter Bridge-Peters Dam Chinook Carcasses Redds Chinook Carcasses Redds Chinook Carcasses Redds Chinook Carcasses Redds Chinook Carcasses Redds Chinook Carcasses Redds 1-Nov Nov Nov Nov Nov Nov Nov Dec Dec Dec Dec TTAL SUBTTAL Corrected* CHINK TTAL Table 7. bservations of Chum salmon in the Lagunitas Creek watershed, spawner season SURVEY DATE CHUM IN LAGUNITAS CREEK Pt Reyes Station-Nicasio Cr. Nicasio Creek - Tocaloma Tocaloma-Devils Gulch Devils Gulch-Shafter Bridge Shafter Bridge-Peters Dam Chum Carcasses Redds Chum Carcasses Redds Chum Carcasses Redds Chum Carcasses Redds Chum Carcasses Redds Chum Carcasses Redds 17-Nov Nov Nov TTAL SUBTTAL Corrected* CHUM TTAL

16 N ic re a s io C ek as i o R ese c Ni rvo ir Pl ge Rd Tocaloma San Francisco Bay Pacific cean Drive rak Sir F r anc is D vd e Bl Lagunitas Creek Watershed ley Val sio ca Ni at f o rm B ri d ee k ed a ) " ) " vil De ' u sg l ch Samuel P. Taylor State Park ) " ) " 2 ) " ) " I # Shafter Bridge Peters Dam 3 Kilometers 13 ke Ke nt La Figure 1. Salmon redds in the Lagunitas Creek Watershed, San Geron Mon tez reek im o C Lar sen Creek Meadow Way k re e ac Coho Pink Steelhead Unknown " ) ) " um I Chum # sc k ree ) Chinook " k ee Cr Lagu nit a yo ) " Species ro Ar ) " Legend Roy's Pools Sir Francis Dra ke Blvd Ca ny o n Ch Wo o da c re a ns Cr ee k Ev Cr July 2018 GIS data developed from USGS Quadrangles, aerial photos, and field surveys. Prepared by the MMWD Fisheries Department. Note: Redd location data was only available for streams surveyed by MMWD.

17 NAA Recovery Target Coho Redds lema Creek Cheda and Nicasio Creeks Devil's Gulch San Geronimo Tributaries San Geronimo Creek Lagunitas Creek Mean 0 Note: The NAA recovery target is 2,600 adults or 1,300 redds assuming two fish per redd. Figure 2. Coho Redds in the Lagunitas Creek Watershed the current year class is highlighted).. 14

18 lema Creek Cheda and Nicasio Creeks Devil's Gulch San Geronimo Tributaries San Geronimo Creek Steelhead Redds Ten-Year Mean Figure 3. Steelhead Redds in the Lagunitas Creek Watershed. 15

19 Rain Mean Daily Flow Instantaneous Peak = 1,450 cfs Daily Rain at Kent Gage in) Upstream Migration Flows Mean Daily Stream Flow at S.P. Taylor Gage cfs) Figure 4. Rain and Lagunitas Creek Stream Flow, Spawning Season

20 70 65 Pink Chinook Chum Coho 600 Redds by Week Steelhead Mean Daily Flow Mean Daily Stream Flow at S.P. Taylor Gage cfs) Figure 5. Salmonid Redds and Lagunitas Creek Stream Flows, Spawner Season

21 Unoccupied redds were classified based on their size, shape, substrate, and date. Unoccupied redds seen after coho spawning was complete were concluded to be steelhead redds. Legend 6.3 Largest 95th Percentile 75th Percentile Mean Elliptical Area of Redds m 2 ) th Percentile 5th Percentile Smallest ccupied Chinook Redds n=5) Unoccupied Chinook Redds n=17) ccupied Coho Redds n=41) Unoccupied Coho Redds n=34) ccupied Pink Redds n=7) Unoccupied Pink Redds n=23) ccupied Chum Redds n=2) ccupied or Late Steelhead Redds n=59) Unoccupied and Early Steelhead Redds n=53) Unclassified Redds n=33) Figure 6. Redd Areas by Species in Lagunitas and San Geronimo Creeks, Spawning Season

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