Physiological and molecular responses of juvenile shortnose sturgeon (Acipenser brevirostrum) to thermal stress

2017 ◽  
Vol 203 ◽  
pp. 314-321 ◽  
Author(s):  
Yueyang Zhang ◽  
Jennifer R. Loughery ◽  
Christopher J. Martyniuk ◽  
James D. Kieffer
Keyword(s):  
Thermal Stress ◽  
Shortnose Sturgeon ◽  
Molecular Responses ◽  
Acipenser Brevirostrum

Critical thermal maximum (CTmax) and hematology of shortnose sturgeons (Acipenser brevirostrum) acclimated to three temperatures

2014 ◽  
Vol 92 (3) ◽  
pp. 215-221 ◽  
Author(s):  
Yueyang Zhang ◽  
James D. Kieffer
Keyword(s):  
Thermal Stress ◽  
Eastern Coast ◽  
Acclimation Temperature ◽  
Critical Thermal Maximum ◽  
Shortnose Sturgeon ◽  
Thermal Biology ◽  
Acipenser Brevirostrum ◽  
Future Studies ◽  
Thermal Maximum ◽  
Biological Impacts

Quantifying a species thermal tolerance is critical to assessing biological impacts of anticipated increases in temperature (e.g., climate change). Although many studies have documented the critical thermal maximum (CTmax) of fish, there is a paucity of research on thermal biology of sturgeon. The shortnose sturgeon (Acipenser brevirostrum LeSueur, 1818) is a threatened species that exists along the eastern coast of North America. They can be exposed to temperatures ranging from freezing to above 25 °C. Using a heating rate of 6 °C/h, CTmax and the associated hematological responses of shortnose sturgeon acclimated to 10, 15, and 20 °C were determined. There was a significant positive relationship between CTmax and body mass, and CTmax increased significantly with increases in acclimation temperature (Ta). In general, hematology of thermally stressed fish was modified relative to control (nonstressed) fish. Hematocrit, plasma lactate, and plasma Na+ and Cl– of fish were all significantly influenced by thermal stress and Ta. Glucose and K+ were only significantly influenced by thermal stress. Future studies should address the importance of other stressors, such as salinity and toxicants, on thermal relationships of sturgeon.

scholarly journals The effects of repeat acute thermal stress on the critical thermal maximum (CTmax) and physiology of juvenile shortnose sturgeon (Acipenser brevirostrum)

2019 ◽  
Vol 97 (6) ◽  
pp. 567-572
Author(s):  
Brittany Bard ◽  
James D. Kieffer
Keyword(s):  
Thermal Stress ◽  
Thermal Tolerance ◽  
Thermal Stresses ◽  
Recovery Period ◽  
Critical Thermal Maximum ◽  
Shortnose Sturgeon ◽  
Acipenser Brevirostrum ◽  
Time Period ◽  
Thermal Maximum ◽  
Plasma Chloride

The shortnose sturgeon (Acipenser brevirostrum Lesueur, 1818) is a species of special concern in Canada, but little is known about their thermal biology. Information on the upper thermal tolerance of shortnose sturgeon becomes valuable for predicting future survival particularly with climate change and improving species management. Using a modified critical thermal maximum (CTmax) methodology, the objective is to determine whether previous thermal stress affects the thermal tolerance of juvenile shortnose sturgeon when exposed to a second thermal stress event. Prior exposure to thermal stress (CTmax1) did not affect the thermal tolerance (CTmax2) of juvenile shortnose sturgeon when a 24 h recovery period was allotted between tests. However, a significant increase in thermal tolerance occurred when the recovery time between the two thermal challenges was 1 h. Plasma glucose, lactate, and osmolality were all significantly affected by thermal stress, but values returned to control levels within 24 h. Hematocrit and plasma chloride concentrations were not significantly affected by thermal stress. All fish survived the CTmax testing. The data indicate that the thermal tolerance of juvenile shortnose sturgeon is modified when multiple thermal stresses occur closer together (1 h) but not if separated by a longer time period (24 h).

Evaluation of four methods of transmitter attachment on shortnose sturgeon, Acipenser brevirostrum

2002 ◽  
Vol 18 (4-6) ◽  
pp. 491-494 ◽  
Author(s):  
M. R. Collins ◽  
D. W. Cooke ◽  
T. I. J. Smith ◽  
W. C. Post ◽  
D. C. Russ ◽  
...  
Keyword(s):  
Shortnose Sturgeon ◽  
Acipenser Brevirostrum

Overwintering habitat use of shortnose sturgeon (Acipenser brevirostrum): defining critical habitat using a novel underwater video survey and modeling approach

2007 ◽  
Vol 64 (9) ◽  
pp. 1248-1257 ◽  
Author(s):  
Xinhai Li ◽  
Matthew K Litvak ◽  
John E. Hughes Clarke
Keyword(s):  
Habitat Use ◽  
Linear Models ◽  
Video Camera ◽  
Sampling Procedure ◽  
Shortnose Sturgeon ◽  
Underwater Video ◽  
Camera System ◽  
Critical Habitat ◽  
Acipenser Brevirostrum ◽  
Modeling Approach

The overwintering habitat use of shortnose sturgeon (Acipenser brevirostrum) was investigated from January to March 2005 in the upper Kennebecasis River, New Brunswick, Canada, using a novel underwater video camera system and modeling approach. Following a random sampling procedure, 187 holes were drilled into the ice, and 234 sturgeon were counted and video-recorded. We found that sturgeon concentrated in a 2 ha area at the confluence of the Kennebecasis and Hammond rivers on a flat sandy substrate at a depth of 3.1–6.9 m. Generalized linear models were developed to describe the relationship of shortnose sturgeon density and habitat variables. The model indicated that the shortnose sturgeon had significant preference to deeper areas within this region. The total abundance of shortnose sturgeon in the area was estimated to be 4836 ± 69 (mean ± standard error) using the ordinary kriging method to interpolate sturgeon density at unsampled sites. This overwintering habitat of shortnose sturgeon can be defined as critical habitat following the identification policies of the Canadian Species at Risk Act (SARA).

Biology, Management, and Protection of North American Sturgeon

2002 ◽  
Keyword(s):  
Extinction Risk ◽  
High Rate ◽  
Future Research ◽  
Shortnose Sturgeon ◽  
Management Options ◽  
Connecticut River ◽  
Acipenser Brevirostrum ◽  
Survival And Reproduction ◽  
Very High ◽  
Existing Data

<em>Abstract.</em>—The shortnose sturgeon, <em>Acipenser brevirostrum</em>, is a long-lived species that grows slowly, matures at an advanced age, and spawns only intermittently. In the Connecticut River, there are two distinct subpopulations of shortnose sturgeon, which have been separated by the Holyoke Dam for 157 years. My research addressed the viability and persistence for these two separate populations and the effects of dispersal, variation in survival and reproduction, and catastrophes. My risk-based approach used a stage-based metapopulation model that I constructed in RAMAS<sup>®</sup> GIS incorporating the available data. Based on the existing data, this population model for the shortnose sturgeon metapopulation in the Connecticut River made several predictions. The observed stability of the two subpopulations was possible either: with reproduction in both upper and lower subpopulations and small to moderate rates of dispersal between them; or with no reproduction in the lower subpopulation, very high reproduction in the upper subpopulation and high rate of net downstream dispersal. My results provided estimates of extinction risk for the shortnose sturgeon metapopulation under various management options and highlighted three key areas for future research, demonstrating the value of a risk-based approach. This approach is particularly useful for management of long-lived aquatic species.

First documented occurrences of the shortnose sturgeon (Acipenser brevirostrum , Lesueur, 1818) in the Saco River, Maine, USA

2013 ◽  
Vol 29 (4) ◽  
pp. 709-712 ◽  
Author(s):  
C. E. Little ◽  
M. Kieffer ◽  
G. Wippelhauser ◽  
G. Zydlewski ◽  
M. Kinnison ◽  
...  
Keyword(s):  
Shortnose Sturgeon ◽  
Acipenser Brevirostrum
Sign in / Sign up

Export Citation Format

Share Document