scholarly journals Seascape connectivity of Gulf sturgeon Acipenser oxyrinchus desotoi population units across the northern Gulf of Mexico

2018 ◽  
Vol 37 ◽  
pp. 195-205 ◽  
Author(s):  
PE Vick ◽  
MS Peterson ◽  
WT Slack
Keyword(s):  
Gulf Of Mexico ◽  
Northern Gulf Of Mexico ◽  
Gulf Sturgeon ◽  
Acipenser Oxyrinchus Desotoi ◽  
Acipenser Oxyrinchus

Biology, Management, and Protection of North American Sturgeon

2002 ◽  
Keyword(s):  
Life History ◽  
Gulf Of Mexico ◽  
River System ◽  
Ultrasonic Telemetry ◽  
Marine Habitat ◽  
Gulf Sturgeon ◽  
Sandy Substrate ◽  
Sampling Locations ◽  
Acipenser Oxyrinchus Desotoi ◽  
Acipenser Oxyrinchus

Abstract.<em>—</em>Although most species of anadromous sturgeons worldwide are threatened with extinction, information on the estuarine and marine components of their life history is generally lacking. During March 1997 to July 1999, we used ultrasonic telemetry to examine estuarine and marine habitat use of adult Gulf sturgeon <em>Acipenser oxyrinchus desotoi</em> from the Choctawhatchee Bay/River System, Florida. During winter and spring, telemetered Gulf sturgeon were distributed nonrandomly within Choctawhatchee Bay, with most relocations in nearshore areas 2–4 m deep. Within the bay, Gulf sturgeon occasionally moved long distances but usually remained in localized areas (<1 km<sup>2</sup>) for several weeks. Areas where Gulf sturgeon remained for prolonged periods were characterized by sandy substrate harboring a benthic community dominated by crustaceans and annelids. A majority of male Gulf sturgeon remained exclusively in Choctawhatchee Bay during the winter and spring. In contrast, a majority of females during this time were either relocated in the Gulf of Mexico or were absent at sampling locations, having last been detected at bay entrances. Declines in habitat quality in Choctawhatchee Bay and the Gulf of Mexico may hinder recovery of this species, since adult Gulf sturgeon rely on these areas for nourishment during periods of gonadal growth.

Estuarine and Coastal Habitat Use of Gulf Sturgeon (Acipenser oxyrinchus desotoi) in the North-Central Gulf of Mexico

2009 ◽  
Vol 32 (2) ◽  
pp. 360-374 ◽  
Author(s):  
Stephen T. Ross ◽  
W. Todd Slack ◽  
Ryan J. Heise ◽  
Mark A. Dugo ◽  
Howard Rogillio ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Habitat Use ◽  
Coastal Habitat ◽  
North Central ◽  
Gulf Sturgeon ◽  
The North ◽  
Acipenser Oxyrinchus Desotoi ◽  
Acipenser Oxyrinchus

SURGICAL REMOVAL OF CATARACTS DUE TO DIPLOSTOMUM SPECIES IN GULF STURGEON (ACIPENSER OXYRINCHUS DESOTOI)

2005 ◽  
Vol 36 (3) ◽  
pp. 504-508 ◽  
Author(s):  
Robert S. Bakal ◽  
Brian H. Hickson ◽  
Brian C. Gilger ◽  
Michael G. Levy ◽  
James R. Flowers ◽  
...  
Keyword(s):  
Surgical Removal ◽  
Gulf Sturgeon ◽  
Acipenser Oxyrinchus Desotoi ◽  
Acipenser Oxyrinchus

Anadromous Sturgeons: Habitats, Threats, and Management

2007 ◽  
Keyword(s):  
River Flow ◽  
High Flow ◽  
Late Winter ◽  
Mean Flow ◽  
Strength Index ◽  
Gulf Sturgeon ◽  
Suwannee River ◽  
Class Strength ◽  
Acipenser Oxyrinchus Desotoi ◽  
Acipenser Oxyrinchus

<em>Abstract.</em>—A 19-year mark–recapture database was used to estimate yearly recruitment of Gulf sturgeon <em>Acipenser oxyrinchus desotoi</em> in the Suwannee River, Florida, using a length–age equation derived from known-age fish. Yearly recruitment information was then transformed into a relative year-class strength index, which was analyzed against monthly river flow. Recruitment was positively correlated with high monthly mean flow in September and December. It is postulated that the correlation is the result of increased survival of late-winter estuarine-feeding age-0 juveniles during high-flow years.

Empirical, spatially explicit natural mortality and movement rate estimates for the threatened Gulf sturgeon (Acipenser oxyrinchus desotoi)

2014 ◽  
Vol 71 (9) ◽  
pp. 1407-1417 ◽  
Author(s):  
Merrill B. Rudd ◽  
Robert N.M. Ahrens ◽  
William E. Pine ◽  
Stephania K. Bolden
Keyword(s):  
Site Fidelity ◽  
Mortality Rates ◽  
Future Research ◽  
Natural Mortality ◽  
Gulf Sturgeon ◽  
Management Plans ◽  
Acipenser Oxyrinchus Desotoi ◽  
Riverine Habitats ◽  
Acipenser Oxyrinchus ◽  
Effective Conservation

Understanding mortality rates and movement patterns across a species’ distribution can provide key insight necessary for developing effective conservation, recovery, and management plans. We directly estimated site fidelity and natural mortality rates for the threatened Gulf sturgeon (Acipenser oxyrinchus desotoi) across a large portion of their range in the northern Gulf of Mexico using acoustic telemetry methods and a simulation-tested, multistate mark–recapture model. Our results suggest that fidelity rates to riverine habitats used during spring and summer are high, but natural mortality rates vary widely. Our results are highly relevant for managing this species. The high fidelity rates, coupled with supporting genetic analyses, suggest that management of individual riverine populations of Gulf sturgeon should be considered. The need for individual river-based management is exacerbated by the variation in natural mortality rates among rivers. The reasons for these differences in mortality are unclear, but are an important area of future research because higher mortality rates may impede recovery of some Gulf sturgeon populations to stated management targets.

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