ICFT 2011 presentation
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International Conference of Fish Telemetry
![Goal / Purpose Compile history of acoustic tracking research in CA to: ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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ICFT 2011 presentation
- 1. Hydroacoustic telemetry as a conservation tool: Integrating studies for comprehensive understanding of native species survival in California
- 3. Determine research trends and data gaps
- 9. Obtain report / publication
- 11. State and Federal agency websites
- 14. Study Objectives by Region 20 Salmonid Migration & Survival 15 Predator Behavior Number of Projects 10 5 South Basin North Basin Central Delta Bay
- 15. Research Effort by Number of Fish Tagged 67.4 % 29.0 % 3.6 % Chinook O. mykiss Predator * Number of tagged fish incomplete value based on non-responsive investigators
- 17. Survival lower than expected in upper reaches
- 18. Relationship between flow and survival influenced by multiple mechanisms
- 19. Patterns of diel migrations for O. mykiss are inconsistent between studies and seasons
- 20. Wild O. mykiss migration differs from hatchery fishVAMP 2007 and 2008; Perry et al. 2010; Newman 2008; Holbrook et al. 2008 Michel et al. 2008; MacFarlane et al 2008; VAMP 2007 and 2008 MacFarlane et al. 2008; Buchanan et al. 2010; Perry et al. 2010; Vogel 2010; Holbrook et al. 2008 Chapman et al. 2008; Sandstrom et al. 2008 Del Real et al. 2010
- 22. Predation on juveniles high at key locations
- 23. Predation confounds interpretation of juvenile survival estimates
- 24. Improving survival estimates requires better data on predator movements relative to salmon movementsMacFarlane et al. 2008; Buchanan et al. 2010 Vogel 2010; SJRGA 2008 and 2009; Clark et al. 2009; Bowen and Bark 2010 Vogel 2010; SJRGA 2008 and 2009; Clark et al. 2009 Vogel 2010; SJRGA 2008 and 2009; Clark et al. 2009; Bowen and Bark 2010
- 26. Importance of fry survival to population persistence
- 27. Southern population data sparse
- 28. Factors that drive O. mykissanadromy/residency
- 31. Rates of mortality through specific migration routes
- 32. Synergy of flows and other sources of mortality
- 33. Fine-scale behavior in modified habitats
- 34. Potential impacts of predation
- 35. Conventional techniques could not provide this information in such a modified system
- 37. Thank you Harmony Patricio Doug Demko Chris Becker John Montgomery 1st International Conference on Fish Telemetry Sapporo, Japan June 2011 dougdemko@fishbio.com www.fishbio.com
Editor's Notes
- The review focused on salmonids because application of telemetry is extensive for this genus. They are protected under endangered species legislation, and telemetry is being applied to conservation activities. They are the most studied genus because of their high economic value and complex anadromous life cycle. Steelhead abundance is believed severely depressed from historical highs, but enumerating the population is confounded by lack of adequate monitoring programs and the presence of ubiquitous resident rainbow trout occupying the same habitat. Whereas steelhead are rare, resident rainbow trout are abundant in the same habitat, and little is known about what factors drive anadromy versus residency.California is the only place in the world that had 4 runs of salmon; fall, late-fall, winter, and spring. Many of the populations are depressed and protected by ESA. Fall-run Chinook salmon are the most abundant of the runs and is largely supported by hatchery production.----- Meeting Notes (6/13/11 19:03) -----focused / protected / conservationsteelhead/rbt abundance4 runs
- Wetter and larger north basin. Dryer and smaller southern basin. Diversity and extent of habitat. Describe Delta.Dam construction ultimately led to the loss of 80-95% of salmon and steelhead habitat.Sac 460 km
- Only 2 universities? Stanford or others?----- Meeting Notes (6/13/11 19:03) -----diverse but partial list
- Because of multiple demands on water resources and changes to habitat, there are many complex and intervening factors that influence salmonid survival. This has lead many groups to seek answers using acoustic telemetry, each with their own methods and goals. The information is amassing, but the level of communication and coordination between these groups limits our ability to gain a comprehensive understanding. To relieve this limitation, we have attempted to acquire information on every hydroacoustic project relevant to salmonid survival that has been conducted in the Sacramento-San Joaquin Basin and Bay-Delta----- Meeting Notes (6/13/11 19:03) -----MULTIPLE demands on water resources = complex and intervening factors influencing salmon survival
- This graph was developed to show the use of different tag types in different regions through time.Division between effort and technology in the North and South. More work is occurring in the northern basin because it’s a larger basin with more stocks, more tributaries, more hatcheries which provide a source for experimental fish. Vemco in the North where primary goal is evaluating migration rate and survival over long distances. HTI in the south where more effort is focused on on fine-scale migration characteristics and survival around irrigation diversions.Range of tag types and how more recent studies have become dominated by only two manufacturers, Ramp-up in the number of projects (related to legislation and development of small tags for juvenile studies). Obviously, the use of acoustic telemetry has exploded in the last 5 years, which has been driven by increased pressure on managers to stop fish declines, but also decreasing size and weight of tags such that juveniles can be effectively tagged. The focus is mostly on juveniles because that’s the life stage where the limiting factors are believed to be.
- Describe CFTC and network of receivers about 460 km (280 km) from dam to SJ confluence, then through bay to ocean.They are efficient by sharing receivers, and sharing the tag detections from the stations they maintain, so that even if they detect a tag that is not part of their study, the person who that tag belongs to will get that data. They have made the most progress in coordinating and sharing information. Unfortunately, as the map shows, we have the conflicting technology of Vemco and HTI being regionally dominant in their respective areas of North an South. This is mainly caused by the fact that HTI was one of the first tags small enough for juveniles so that's what we used for VAMP. Jon Nelson on the Yuba River has been tagging O. mykiss since 2008. Thus far over 300 wild caught fish have been tagged and tracked. The goal is to determine residency/anadromy and habitat use.
- This graph is good and important because it shows that while we have done some work on predation, we have done relatively less work on it than we have on migration and survival (even more obvious with pie chart showing number of tags), and shows that predation work has mostly been concentrated in the central delta. It also shows that the North Basin has had more research done than in the South Basin. These are two big results I called out in our abstract. I think we need to show it. We DID NOT include any studies in the "Predator Behavior" category unless they tagged predators. I think most of these studies are from the facilities, where a lot of work has been done specifically on predators. Salmonid Migration & SurvivalPredator BehaviorNorth Delta 8 1Central Delta 8 11South Delta 3 1Bay 4 2
- If we simply use the number of tagged fish released as an indication of overall “effort” in the Central Valley, Chinook predominate.Although juvenile Chinook account for 2/3rds of tagged fish released in California, one project makes up almost half of the fish released. (which project is this?).O. mykissaccount for almost another third of the tagged fish released.Although predation studies have occurred for over 35 years, less than 4% of the tags have actually been used on predator fish, but only in recent years have we learned how extensive predation is, and we have actually learned more about predation with unexpected data emerging from juvenile chinook studies.”
- Considering the complexity of the CV and Bay-Delta system, and the influence of so many environmental variables on fish migration, this work is still in its infancy.