Tissue Contaminant Burdens in San Francisco Estuary White Sturgeon (Acipenser transmontanus): Implications for Population Recovery

2017 ◽  
Vol 73 (2) ◽  
pp. 334-347 ◽  
Author(s):  
Deke T. Gundersen ◽  
Steven C. Zeug ◽  
Robert B. Bringolf ◽  
Joseph Merz ◽  
Zachary Jackson ◽  
...  
Keyword(s):  
San Francisco ◽  
San Francisco Estuary ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Population Recovery

scholarly journals Estuarine Habitat Use by White Sturgeon (Acipenser transmontanus)

2020 ◽  
Vol 18 (4) ◽  
Author(s):  
Oliver Patton ◽  
Veronica Larwood ◽  
Matthew Young
Keyword(s):  
San Francisco ◽  
Water Channel ◽  
Open Water ◽  
San Francisco Estuary ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Structural Elements ◽  
Estuarine Habitat ◽  
Habitat Gradient ◽  
Variable Water

White Sturgeon (Acipenser transmontanus), a species of concern in the San Francisco Estuary, is in relatively low abundance due to a variety of factors. Patton et al. sought identify the estuarine habitat used by White Sturgeon to aid in the conservation and management of the species locally and across its range. By seasonally sampled sub-adult and adult White Sturgeon in the central estuary using setlines across a habitat gradient representative of three primary structural elements, the authors found that the shallow open-water shoal and deep open-water channel habitats were consistently occupied by White Sturgeon in spring, summer, and fall across highly variable water quality conditions, whereas the shallow wetland channel habitat was essentially unoccupied. In summary, sub-adult and adult White Sturgeon inhabit estuaries in at least spring, summer, and fall and small, shallow wetland channels are relatively unoccupied.

scholarly journals Confirmed Observation: A North American Green Sturgeon Acipenser medirostris Recorded in the Stanislaus River, California

2018 ◽  
Vol 9 (2) ◽  
pp. 624-630 ◽  
Author(s):  
Jesse T. Anderson ◽  
Gregg Schumer ◽  
Paul J. Anders ◽  
Kyle Horvath ◽  
Joseph E. Merz
Keyword(s):  
San Francisco ◽  
North American ◽  
San Francisco Estuary ◽  
White Sturgeon ◽  
Green Sturgeon ◽  
Distinct Population ◽  
Acipenser Medirostris ◽  
San Joaquin River ◽  
Distinct Population Segment ◽  
Population Segment

AbstractTwo sturgeon species are native to the San Francisco Estuary watershed in California: White Sturgeon Acipenser transmontanus and North American Green Sturgeon Acipenser medirostris. The San Francisco Estuary has two main tributaries, the Sacramento and San Joaquin rivers. Recent studies have shown that the San Joaquin River is used by Green and White Sturgeon and that at least a small number of White Sturgeon spawn there when environmental conditions allow. However, records of Green Sturgeon in the San Joaquin River and its tributaries are rare and limited to information from angler report cards. In 2006, the National Marine Fisheries Service listed the southern distinct population segment of North American Green Sturgeon as threatened under the Endangered Species Act. Federally designated critical habitat for the southern distinct population segment of Green Sturgeon does not extend upstream of the San Joaquin River's confluence with the Stanislaus River. We recently confirmed an adult Green Sturgeon holding in a deep pool near Knights Ferry, California in the Stanislaus River. We observed and recorded the fish using a GoPro® video camera and used environmental deoxyribonucleic acid sampling techniques to confirm species identification. This paper provides the first confirmed record of Green Sturgeon in any tributary of the San Joaquin River, which is beyond the designated critical habitat area. Future well-designed research focused on the San Joaquin River and its tributaries is expected to improve our understanding regarding the importance of these rivers for the various life stages of North American Green Sturgeon.

Spatio-temporal distribution of Green Sturgeon (Acipenser medirostris) and White Sturgeon (A. transmontanus) in the San Francisco Estuary and Sacramento River, California

2020 ◽  
Vol 103 (5) ◽  
pp. 577-603 ◽  
Author(s):  
Emily A. Miller ◽  
Gabriel P. Singer ◽  
Matthew L. Peterson ◽  
Eric D. Chapman ◽  
Myfanwy E. Johnston ◽  
...  
Keyword(s):  
San Francisco ◽  
Temporal Distribution ◽  
San Francisco Estuary ◽  
Sacramento River ◽  
White Sturgeon ◽  
Green Sturgeon ◽  
Acipenser Medirostris ◽  
Spatio Temporal

White Sturgeon Spawning in the San Joaquin River, California, and Effects of Water Management

2015 ◽  
Vol 7 (1) ◽  
pp. 171-180 ◽  
Author(s):  
Zachary J. Jackson ◽  
Joshua J. Gruber ◽  
Joel P. Van Eenennaam
Keyword(s):  
Water Management ◽  
San Francisco ◽  
San Francisco Estuary ◽  
Sacramento River ◽  
White Sturgeon ◽  
Late Winter ◽  
Successful Management ◽  
Pulse Flow ◽  
San Joaquin River ◽  
The World

Abstract Inadequate recruitment is a hallmark of declining sturgeon populations throughout the world. Efforts to understand and address the processes that regulate recruitment are of foremost importance for successful management and recovery. Fish biologists previously only knew San Francisco Estuary white sturgeon (Acipenser transmontanus) to spawn in the Sacramento River, California. We assessed potential white sturgeon spawning locations by deploying artificial substrate samplers during late winter and spring of 2011 and 2012 from river kilometers 115.2 to 145.3 of the San Joaquin River. Collections of fertilized eggs, coupled with hydrology data, confirm that white sturgeon spawned within one and four sites in the San Joaquin River during wet (2011; n = 23) and dry (2012; n = 65) water-year conditions. Small pulse flow augmentations intended to benefit juvenile salmonids appear to have triggered white sturgeon spawning within this system. Understanding the effects of water management on spawning and subsequent recruitment is necessary to increase white sturgeon recruitment to the San Francisco Estuary.

scholarly journals Living Fossils: Sturgeon of the San Francisco Estuary

2021 ◽  
Vol 9 ◽  
Author(s):  
Page E. Vick ◽  
John T. Kelly
Keyword(s):  
Climate Change ◽  
Water Management ◽  
San Francisco ◽  
New Technologies ◽  
San Francisco Estuary ◽  
Body Armor ◽  
White Sturgeon ◽  
Spawning Habitat ◽  
Living Fossils ◽  
Sturgeon Species

Sturgeon are fish that are considered living fossils. Their ancestors date back over 200 million years, to the same time as dinosaurs. These fish can grow taller than humans (over 2 m), weigh over 160 kg, and live as long as humans. Sturgeon species have special adaptations, such as a vacuum-like mouth and body armor called scutes. There are 27 species of sturgeon worldwide. Two species, green and white sturgeon, are native to California, USA, and are some of the largest animals in San Francisco Bay. Sturgeon populations have declined due to habitat loss, water management, overfishing, poaching, pollution, and climate change. Sturgeon cannot jump over barriers like salmon can, so structures like dams that block water also block sturgeon from reaching their natural spawning habitat farther upstream in the river. Scientists are using new technologies to monitor sturgeon populations and discover the unique behaviors of these dinosaur-era fish in California’s rivers and estuaries.

Selenium tissue burden compartmentalization in resident white sturgeon (Acipenser transmontanus) of the San Francisco Bay Delta estuary

2014 ◽  
Vol 34 (1) ◽  
pp. 152-160 ◽  
Author(s):  
Javier Linares-Casenave ◽  
R. Linville ◽  
J.P. Van Eenennaam ◽  
J.B. Muguet ◽  
S.I. Doroshov
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Tissue Burden

Co-infection of Acipenserid herpesvirus 2 (AciHV-2) and Streptococcus iniae in cultured white sturgeon Acipenser transmontanus

2017 ◽  
Vol 124 (1) ◽  
pp. 11-20 ◽  
Author(s):  
E Soto ◽  
C Richey ◽  
B Stevens ◽  
S Yun ◽  
K Kenelty ◽  
...  
Keyword(s):  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Streptococcus Iniae

Acute Toxicity Testing with Juvenile White Sturgeon (Acipenser transmontanus)

1998 ◽  
Vol 33 (1) ◽  
pp. 95-110 ◽  
Author(s):  
W.R. Bennett ◽  
A.P. Farrell
Keyword(s):  
Acute Toxicity ◽  
Swimming Performance ◽  
Juvenile Fish ◽  
Toxicity Testing ◽  
White Sturgeon ◽  
Acipenser Transmontanus ◽  
Toxicity Tests ◽  
Fraser River ◽  
Acute Toxicity Tests ◽  
Acute Toxicity Testing

Abstract The primary goal of this study was to investigate the possibility of using early life stages of white sturgeon (Acipenser transmontanus) (eggs, larvae and fry) as a species relevant to the Fraser River, B.C., for the acute and sublethal toxico-logical testing of forest industry effluents. Here we report the first successful acute toxicity tests for 8-day-old larvae and 42-day-old fry exposed to several chemicals known to be released into the Fraser River (i.e., 6 monochlorovanillin [6 MVAN], 4,5 dichloroguaiacol [4,5 DCG], 4,5 dichlorocatechol [4,5 DCAT], pentachlorophenol [PCP], and didecyldimethylammonium chloride [DDAC]). In most cases, white sturgeon fry were at the lower end of the range for acute toxicity values for chlorinated phenolic compounds, when compared with other juvenile fish species, and they were extremely sensitive to DDAC. The larval stage was usually more sensitive than the fry stage. Acute toxicity tests with fertilized eggs were unsuccessful. A postexposure growth study was inconclusive because neither control nor toxicant-exposed larvae and fry withstood the additional handling used for measuring body mass. At 62-days-old, fry were more tolerant of handling. This allowed measurement of their swimming performance. Although we have concerns about the reliability of using larvae for acute toxicity testing at this time, 60-day-old white sturgeon fry would appear to be both a sensitive and relevant species for assessing environmental impacts relevant to the Fraser River.

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