Dissertation/Thesis Abstract

Distribution, habitat use, and movement patterns of sub-adult striped bass morone saxatilis in the San Francisco Estuary Watershed, California
by Le Doux-Bloom, Cynthia M., Ph.D., University of California, Davis, 2012, 119; 3555353
Abstract (Summary)

Striped bass Morone saxatilis are diadromous, long-lived, apex predator intentionally introduced from the Atlantic Coast to the San Francisco Estuary Watershed (SFEW) in 1879.

In Chapter 1, we investigate the effects of different closure materials on incision healing over 30 days after implantation of an acoustic transmitter into the peritoneal cavity of sub-adult striped bass. Treatments included: anesthesia only, anesthesia and Monocryl Plus suture, anesthesia and Vicryl Plus suture, and anesthesia and Surgi-Loc adhesive material. We concluded: 1) closing incisions with an absorbable suture material accelerates healing, reduced openness, inflammation, and ulceration on the incision; 2) closing incisions with Vicryl Plus increased transmitter and suture retention, and decreased inflammation and ulceration; and 3) Vicryl Plus may be a suitable incision closure material for other fishes with ctenoid scales.

In Chapter 2, we investigate the distribution and habitat use of sub-adult striped bass (n=99) implanted with individually coded acoustic transmitters. Fish were tracked for 17 months by stationary receivers (n>300) spanning the SFEW. We concluded sub-adult striped bass: 1) are distributed differently by season and region; 2) use limnetic to polyhaline habitat across all seasons and limnetic to euhaline habitat in the fall; 3) use temperate (15-20°C) and cool (10-15°C) water from fall thru spring, and warm (20-25°C) and temperate water in summer; and 4) use shoals most often, and channels and shoals equally in winter.

In Chapter 3, we investigate movement patterns of transmittered sub-adult striped bass using statistics and Esri's GIS Tracker Analyst and Time Slider to conduct Visual Analysis. Movement patterns differed between fish and groups of fish. During our study, sub-adult striped bass exhibited three distinct patterns of residence: 1) Riverine, 2) Estuarine, and 3) Bay. Riverine residents remained within freshwater habitat across all seasons. Estuarine residents exhibited movement patterns dominated within mesohaline habitats, seldom visiting riverine or marine habitats. Bay residents moved within polyhaline and euhaline habitats across all seasons. In summary, our findings represent the first behavior studies on sub-adult striped bass in the SFEW and describe their distribution, habitat use, and movement patterns.

Indexing (document details)
Advisor: Johnson, Michael L.
Commitee: Doroshov, Serge I., Isely, John J.
School: University of California, Davis
Department: Animal Biology
School Location: United States -- California
Source: DAI-B 74/07(E), Dissertation Abstracts International
Subjects: Ecology, Behavioral Sciences, Aquatic sciences
Keywords: Acoustic biotelemetry, Habitat use, Morone saxatilis, San francisco estuary watershed, Subadult striped bass, Suture performance
Publication Number: 3555353
ISBN: 978-1-267-96877-7
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