Life histories of migratory species such as anadromous fishes make them particularly susceptible to composite effects of processes experienced across distinct habitats and life stages. Therefore, their population dynamics are difficult to quantify and manage without tools such as life‐cycle models. As a model species for which life‐cycle modeling is particularly useful, we provide an analysis of influential processes affecting dynamics of the Central Valley fall‐run Chinook salmon (CVFC) population (Oncorhynchus tshawytscha ). This analysis demonstrates how, through identification of covariates that affect this population at each life stage and their relationship to one another, it is possible to identify actions that best promote sustainability for this anadromous species. We developed a life‐cycle model for CVFC examining primary processes influencing variability in observed patterns of escapement from 1988 to 2016. CVFC are a valuable fishery along the US West Coast; however, their natural population is a fraction of its historic size, and recent low escapements have resulted in substantial restrictions on the fishery. Our model explains 68.3% of variability in historic escapement values. The most influential processes include temperatures experienced during egg incubation, freshwater flow during juvenile outmigration, and environmentally mediated predation during early marine residence. This work demonstrates the need, and methodology, for considering the interactions between freshwater and marine dynamics when evaluating the efficacy of managerial practices in freshwater and the ocean, especially in the context of increased environmental variability, climate change, and dynamic predator populations. The methodology developed in this study can be used toward improved conservation and management of other anadromous fishes and migratory species.
Forrestal, Francesca C.; McDonald, M. Danielle; Burress, Georgianna; Die, David J.;
Published Date:
2017
Source:
Conserv Physiol;
. 2017 Jun 8;5(1):cox035.;
Description:
Yellowtail snapper (Ocyurus chrysurus) is an important part of the reef fish assemblage in the western, tropical Atlantic and is caught by both recreational and commercial fisheries in south Florida and the Bahamas. It is estimated that 80% of snappe...
Abrahms, Briana; Hazen, Elliott L.; Aikens, Ellen O.; Savoca, Matthew S.; Goldbogen, Jeremy A.; Bograd, Steven J.; Jacox, Michael G.; Irvine, Ladd M.; Palacios, Daniel M.; Mate, Bruce R.;
Published Date:
2019
Source:
Proc Natl Acad Sci U S A. 2019 Mar 19; 116(12): 5582–5587
Description:
In terrestrial systems, the green wave hypothesis posits that migrating animals can enhance foraging opportunities by tracking phenological variation in high-quality forage across space (i.e., “resource waves”). To track resource waves, animals m...
Cheng, J.; Liu, Z. Y.; Zhang, S. Q.; Liu, W.; Dong, L. N.; Liu, P.; Li, H. L.;
Published Date:
2016
Source:
Proc Natl Acad Sci U S A. 2016 Mar 22; 113(12): 3175-3178.
Description:
Interdecadal variability of the Atlantic Meridional Overturning Circulation (AMOC-IV) plays an important role in climate variation and has significant societal impacts. Past climate reconstruction indicates that AMOC-IV has likely undergone significa...
Zavala-Araiza, D.; Lyon, D. R.; Alvarez, R. A.; Davis, K. J.; Harriss, R.; Herndon, S. C.; Karion, A.; Kort, E. A.; Lamb, B. K.; Lan, X.; Marchese, A. J.; Pacala, S. W.; Robinson, A. L.; Shepson, P. B.; Sweeney, C.; Talbot, R.; Townsend-Small, A.; Yacovitch, T. I.; Zimmerle, D. J.; Hamburg, S. P.;
Published Date:
2015
Source:
Proc Natl Acad Sci U S A. 2015 Dec 22; 112(51): 15597-15602.
Description:
Published estimates of methane emissions from atmospheric data (top-down approaches) exceed those from source-based inventories (bottom-up approaches), leading to conflicting claims about the climate implications of fuel switching from coal or petrol...
The emergence of Zika virus (ZIKV) in Latin America and the Caribbean in 2014-2016 occurred during a period of severe drought and unusually high temperatures, conditions that have been associated with the 2015-2016 El Niño event, and/or climate chan...
Anderegg, W. R. L.; Ballantyne, A. P.; Smith, W. K.; Majkut, J.; Rabin, S.; Beaulieu, C.; Birdsey, R.; Dunne, J. P.; Houghton, R. A.; Myneni, R. B.; Pan, Y. D.; Sarmiento, J. L.; Serota, N.; Shevliakova, E.; Tans, P.; Pacala, S. W.;
Published Date:
2015
Source:
Proc Natl Acad Sci U S A. 2015 Dec 22; 112(51): 15591-15596.
Description:
The terrestrial biosphere is currently a strong carbon (C) sink but may switch to a source in the 21st century as climate-driven losses exceed CO2-driven C gains, thereby accelerating global warming. Although it has long been recognized that tropical...
Lefohn, A. S.; Malley, C. S.; Smith, L.; Wells, B.; Hazucha, M.; Simon, H.; Naik, V.; Mills, G.; Schultz, M. G.; Paoletti, E.; De Marco, A.; Xu, X. B.; Zhang, L.; Wang, T.; Neufeld, H. S.; Musselman, R. C.; Tarasick, D.; Brauer, M.; Feng, Z. Z.; Tang, H. Y.; Kobayashi, K.; Sicard, P.; Solberg, S.; Gerosa, G.;
Published Date:
2018
Source:
Elem Sci Anth, 6(1), p.28.
Description:
Assessment of spatial and temporal variation in the impacts of ozone on human health, vegetation, and climate requires appropriate metrics. A key component of the Tropospheric Ozone Assessment Report (TOAR) is the consistent calculation of these metr...
Duncan, K.; Farrell, S. L.; Connor, L. N.; Richter-Menge, J.; Hutchings, J. K.; Dominguez, R.;
Published Date:
2018
Source:
Annals of Glaciology, 59(76pt2), 137-147.
Description:
Pressure ridges impact the mass, energy and momentum budgets of the sea-ice cover and present an obstacle to transportation through ice-infested waters. Quantifying ridge characteristics is important for understanding total sea-ice mass and for impro...
Wahl, Eugene R.; Zorita, Eduardo; Trouet, Valerie; Taylor, Alan H.;
Published Date:
2019
Source:
Proc Natl Acad Sci U S A. 2019 Mar 19; 116(12): 5393–5398
Description:
Moisture delivery in California is largely regulated by the strength and position of the North Pacific jet stream (NPJ), winter high-altitude winds that influence regional hydroclimate and forest fire during the following warm season. We use climate ...
With rapid and accelerated Arctic sea-ice loss, it is beneficial to update and baseline historical change on the regional scales from a consistent, intercalibrated, long-term time series of sea-ice data for understanding regional vulnerability and mo...
Gabriele, Christine M.; Neilson, Janet L.; Straley, Janice M.; Baker, C. Scott; Cedarleaf, Jennifer A.; Saracco, James F.;
Published Date:
2017
Source:
Ecosphere 8(1): e01641
Description:
The rigorous program of monitoring humpback whales (Megaptera novaeangliae ), implemented by Glacier Bay National Park and Preserve in 1985, augmented by additional data collected in southeastern Alaska since 1968, constitutes one of the longest stud...
Trego, Marisa L.; Whitehead, Andrew; Kellar, Nicholas M.; Lauf, Morgane; Lewison, Rebecca L.;
Published Date:
2019
Source:
Conserv Physiol;
. 2019 May 15;7(1):coz018.;
Description:
Marine wildlife populations are adapted to survive in highly dynamic environments. However, identifying the effects of endogenous versus exogenous variables on marine mammal physiology remains a substantial challenge in part because of the logistical...
We documented blood biochemistry and haematology of healthy loggerhead turtles (Caretta caretta) in the Northwest (NW) Atlantic in order to establish clinical reference intervals (RIs) for this threatened population. Blood samples were analysed from ...
Tomscha, Stephaie A.; Gergel, Sarah E.; Tomlinson, Matthew J.;
Published Date:
2017
Source:
Ecosphere 8(3): e01728
Description:
River‐floodplains are hotspots for many ecosystem services (ES ), and thus, understanding how these services are spatially organized along river systems is essential. General principles from river‐floodplain ecology may provide guidance for under...
Brown, S. M.; Heguy, A.; Zappile, P.; Chen, H.; Goradia, A.; Wang, Y. L.; Hao, Y. H.; Roy, N. K.; Vitale, K.; Chambers, R. C.; Wirgin, I.;
Published Date:
2017
Source:
Genome Biol Evol;
. 2017 Sept; 9(9):2251-2264.;
Description:
Atlantic tomcod in the Hudson River Estuary bioaccumulate high hepatic burdens of environmental toxicants. Previously, we demonstrated that Hudson River tomcod developed resistance to TCDD and PCB toxicity probably through strong natural selection du...