8 research outputs found
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Survival of Juvenile Chinook Salmon in the Yolo Bypass and the Lower Sacramento River, California
While our knowledge of the range of survival that outmigrating juvenile Chinook Salmon experience in different routes of the Sacramento–San Joaquin Delta has increased in recent years, few studies have focused on their survival during outmigration in the Yolo Bypass, the Delta’s primary floodplain. The Yolo Bypass floodplain provides valuable rearing habitat and growth benefits to juvenile fish in flood years, and efforts are underway to improve access to the Yolo Bypass and the Toe Drain, its perennial navigation channel, under a broader range of flows and river stages than is currently possible. We compared variation in transit time, and estimated survival between different release groups of fish outmigrating through the Yolo Bypass or through migratory routes in the lower Sacramento River. Tagged late-fall-run juvenile Chinook Salmon were released in both systems in 2012 and 2013. There was no significant difference between the estimated cumulative probability of survival in the Yolo Bypass system and combined routes of the lower Sacramento River in either year (0.312–0.629 vs. 0.342–0.599, 95% credible interval in 2012; and 0.111–0.408 vs. 0.240–0.407, 95% credible interval in 2013, respectively). The Yolo Bypass had a higher coefficient of variation (CV) in travel time relative to the lower Sacramento River routes in both years (0.34 vs. 0.29 in 2012, and 0.44 vs. 0.34 in 2013). This work suggests that in relatively low water years, the estimated survival of outmigrating juvenile Chinook Salmon in the Toe Drain is directly comparable to routes in the lower Sacramento River, and that metrics of behavioral diversity in movement behavior can and should be incorporated into future telemetry studies
Recommended from our members
Survival of Juvenile Chinook Salmon in the Yolo Bypass and the Lower Sacramento River, California
While our knowledge of the range of survival that outmigrating juvenile Chinook Salmon experience in different routes of the Sacramento–San Joaquin Delta has increased in recent years, few studies have focused on their survival during outmigration in the Yolo Bypass, the Delta’s primary floodplain. The Yolo Bypass floodplain provides valuable rearing habitat and growth benefits to juvenile fish in flood years, and efforts are underway to improve access to the Yolo Bypass and the Toe Drain, its perennial navigation channel, under a broader range of flows and river stages than is currently possible. We compared variation in transit time, and estimated survival between different release groups of fish outmigrating through the Yolo Bypass or through migratory routes in the lower Sacramento River. Tagged late-fall-run juvenile Chinook Salmon were released in both systems in 2012 and 2013. There was no significant difference between the estimated cumulative probability of survival in the Yolo Bypass system and combined routes of the lower Sacramento River in either year (0.312–0.629 vs. 0.342–0.599, 95% credible interval in 2012; and 0.111–0.408 vs. 0.240–0.407, 95% credible interval in 2013, respectively). The Yolo Bypass had a higher coefficient of variation (CV) in travel time relative to the lower Sacramento River routes in both years (0.34 vs. 0.29 in 2012, and 0.44 vs. 0.34 in 2013). This work suggests that in relatively low water years, the estimated survival of outmigrating juvenile Chinook Salmon in the Toe Drain is directly comparable to routes in the lower Sacramento River, and that metrics of behavioral diversity in movement behavior can and should be incorporated into future telemetry studies
Correction to: Spatio-temporal distribution of Green Sturgeon (Acipenser medirostris) and White Sturgeon (A. transmontanus) in the San Francisco Estuary and Sacramento River, California
Experimental evaluation of the use of vision and barbels as references for rheotaxis in green sturgeon
Culture and healthy lifestyles: A qualitative exploration of the role of food and physical activity in three urban Australian Indigenous communities
Objective: 1) To explore the links between Indigenous Australian children\u27s perspectives on culture, and healthy lifestyle behaviours. 2) To provide insight into how to approach the development of a health intervention targeting lifestyle behaviours in Australian Indigenous children. Methods: Seven semi-structured focus groups sessions were conducted with Australian Indigenous children aged 5-12 years living on the South Coast of New South Wales. Audio-recordings were transcribed and thematic analyses were conducted and related to principles of grounded theory. Results: Participants had connections to aspects of Australian Indigenous culture that were embedded in their everyday lives. Healthy lifestyle behaviours (such as healthy eating and physical activity) were found to be interconnected with Australian Indigenous culture and positive emotional wellbeing was identified as an important outcome of connecting Australian Indigenous children to cultural practices. Conclusion: Understanding the importance of culture and its role in healthy lifestyles is critical in the development of health interventions for Indigenous populations. Implication: Health interventions embedded with Australian Indigenous culture may have potential to improve physical and emotional health within Australian Indigenous communities. However, it is unlikely that a \u27one size fits all\u27 approach to health interventions can be taken
Culture and healthy lifestyles: a qualitative exploration of the role of food and physical activity in three urban Australian Indigenous communities
Experimental Quantification of Piscivore Density and Habitat Effects on Survival of Juvenile Chinook Salmon in a Tidal Freshwater Estuary
Data Carpentry R Ecology Lesson v2017.04.2
## R-ecology-lesson v2017.04.0
Initial release of the Data Carpentry R ecology lesson