Marisa Litz

Marisa Litz
Washington Department of Fish & Wildlife | WDFW · Science Division

PhD, Fisheries Science

About

33
Publications
5,055
Reads
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496
Citations
Additional affiliations
February 2017 - present
Washington Department of Fish & Wildlife
Position
  • Pink, Chum, & Sockeye Specialist
April 2008 - October 2011
Oregon State University
Position
  • Research Assistant
June 2005 - October 2005
Northwest Fisheries Science Center
Position
  • Biological Technician
Education
September 2011 - December 2016
Oregon State University
Field of study
  • Fisheries Science

Publications

Publications (33)
Technical Report
Full-text available
Grays Harbor Chum Salmon populations include spawners within the Chehalis River Basin, Humptulips River Basin, and smaller tributaries that empty into the south of Grays Harbor. Washington Department of Fish and Wildlife (WDFW) and the Aquatic Species Enhancement Plan Technical Committee of the Chehalis Basin Strategy (Aquatic Species Enhancement P...
Technical Report
Full-text available
Adult salmon and steelhead abundances for Newaukum River sub-basin in the Chehalis River Basin for 2020 Chinook and Coho and 2021 Steelhead.
Article
An improved understanding of the mechanisms influencing productivity of fish populations is critical for accurately determining harvest rates and identifying years of conservation concern. Here we reconstruct yearly scale growth of three Puget Sound (PS) Chum Salmon Oncorhynchus keta stocks over 16 brood years (1997–2012) to better understand how v...
Article
Understanding and quantifying migration phenology of commercially harvested Pacific salmon (Oncorhynchus spp.) is a cornerstone for managing sustainable populations. Here, we use a multi-decadal data timeseries together with a hypothesis driven framework to evaluate migration phenology in adult fall and winter ecotype chum salmon (O. keta) in a poo...
Article
Over the last 5 decades, natural populations of pink (Oncorhynchus gorbuscha) and chum (O. keta) salmon were the most abundant salmon species returning to Washington, USA. Pink salmon predominantly returned in odd years, and chum salmon stocks that interacted with pink salmon exhibited strong even- and odd-year variations in abundance, size, age-at...
Technical Report
Full-text available
The Newaukum River basin was selected as a “pilot watershed” in 2015 by Chehalis Lead Entity to help guide and monitor restoration projects in the Chehalis River basin and to determine how climate change may affect the salmonid populations in the basin (http://www.chehalisleadentity.org/our-work/). Both an adult and juvenile monitoring program have...
Article
In this study, we used scale analysis of returning adults to examine the relationship between early marine growth, feeding conditions, and survival for southern Salish Sea Chinook salmon (Oncorhynchus tshawytscha). In total, we examined scales from 2,604 individuals over 7 outmigration years characterized by a range of survival conditions from 1976...
Technical Report
Full-text available
Upper Chehalis River spawner abundance and distribution intensive study from 2013-2019 for Salmon and Steelhead. Funded to fill a data gap in an area where a flood retention facility is proposed.
Article
Full-text available
Variation in prey quantity and quality can influence growth and survival of marine predators, including anadromous fish that migrate from freshwater systems. The objective of this study was to examine the energy dynamics of subyearling Chinook salmon (Oncorhynchus tshawytscha) following freshwater emigration. To address this objective, a population...
Article
Surveys of juvenile and larval stages can be useful for management of commercially important marine fishes but require definitive species identification. From May through October 2005–2008, mid-water (30-m) trawls collected 78,407 late-larval and juvenile rockfish (Sebastes spp.) in shelf and slope waters off Oregon and Washington. Because of their...
Article
A three-phase experiment measured the effects of prey quality and fasting on juvenile Chinook salmon (Oncorhynchus tshawytscha) performance. The first phase was designed to evaluate the effect of dietary levels of two essential fatty acids, docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), on salmon growth. Salmon were reared for 12 weeks...
Article
There is strong correlative evidence that variation in the growth and survival of secondary consumers is related to the copepod species composition within the Northern California Current. Potential mechanisms driving these correlations include: 1) enhanced growth and survival of secondary consumers when lipid-rich, boreal copepod species are abunda...
Article
Full-text available
Variations in marine prey availability and nutritional quality can affect juvenile salmon growth and survival during early ocean residence. Salmon growth, and hence survival, may be related to the onset of piscivory, but there is limited knowledge on the interplay between the prey field, environment, and salmon ontogeny. Subyearling Chinook Salmon...
Article
Litz, M. N. C., Emmett, R. L., Bentley, P. J., Claiborne, A. M., and Barceló, C. Biotic and abiotic factors influencing forage fish and pelagic nekton community in the Columbia River plume (USA) throughout the upwelling season 1999–2009. – ICES Journal of Marine Science, 71: . Large river plumes modify coastal environments and can impact production...
Article
Full-text available
Most modeling and statistical approaches encourage simplicity, yet ecological processes are often complex, as they are influenced by numerous dynamic environmental and biological factors. Pacific salmon abundance has been highly variable over the last few decades and most forecasting models have proven inadequate, primarily because of a lack of und...
Article
Full-text available
The transition between freshwater and marine environments is associated with high mortality for juvenile anadromous salmonids, yet little is known about this critical period in many large rivers. To address this deficiency, we investigated the estuarine ecology of juvenile salmonids and their associated fish assemblage in open-water habitats of the...
Article
We examined variability in growth rate during the larval stage of northern anchovy (Engraulis mordax) in response to physical and biological environmental factors in 2005 and 2006. The onset of spring upwelling was anomalously delayed by 2–3 months until mid-July in 2005; in contrast, spring upwelling in 2006 began as a normal year in the northern...
Article
Full-text available
AbSTRACT the state of the california current system (ccs) since spring 2010 has evolved in response to the devel-opment of cooler la Niña following the dissipation of the relatively weak and short-lived El Niño event of 2009–2010. the 2009–2010 El Niño appears to have dissipated quite rapidly in early spring 2010, yet the transition to anomalously...
Article
Full-text available
Recent visits by humboldt squid (Dosidicus gigas) to the northern California Current system (CCs) were suggested to be related to larger climatic events such as El Niño, global warming, and expansion and shoaling of the oxygen minimum zone. due to their plasticity in foraging behavior, coupled with an increased availability of prey resources, these...
Article
Full-text available
Juvenile salmon exhibit high growth rates upon their arrival into the marine environment. Dietary changes from freshwater and estuarine habitats to those derived from the marine environment may play an important role in ultimate adult survival. We measured the total lipid and fatty acid (FA) composition of juvenile Chinook salmon (Oncorhynchus tsha...
Article
Full-text available
Lipids and fatty acids (FA) were investigated in 4 species of forage fish: northern anchovy Engraulis mordax, Pacific sardine Sardinops sagax, Pacific herring Clupea pallasi, and whitebait smelt Allosmerus elongatus, for their ability to serve as biological indicators of ocean conditions in the California Current large marine ecosystem (CCLME). Sam...
Article
Full-text available
Northern anchovy (Engraulis mordax) are a dominant fish in the northern California Current and are important prey for many predators. However, little is known about how anchovy distribution and abundance are affected by oceanographic variability in the eastern Pacific Ocean.We examined the relationship between anchovy abundance and environmental va...

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Projects

Project (1)
Project
Understanding marine survival of salmon. Specifically, I look at trophic habits of threatened and endangered salmon from the Northern California Current, and Gulf of Alaska. Newest project will be to quantify interannual caloric values of salmon prey during cold and warm ocean periods. I also work on larval fish dynamics, and forage and jellyfish trophic habits.