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Shartau RB, Shu J, Baker DW. The role of salinity in recovery of white sturgeon ( Acipenser transmontanus) from stimulated angling stress. CONSERVATION PHYSIOLOGY 2023; 11:coad009. [PMID: 36950376 PMCID: PMC10025808 DOI: 10.1093/conphys/coad009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 02/01/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
White sturgeon (Acipenser transmontanus) in the Lower Fraser River are the focus of a catch-and-release angling fishery in British Columbia, Canada. However, the lower region of the catch area includes areas where tidal waters invade, and the consequence of salinity levels on recovery from an angling challenge are not characterized in sturgeon, despite theoretical implications of its import. We acclimated white sturgeon to various salinities (0, 10 and 20‰ (parts per thousand)) to investigate the effects of acclimation on recovery from stimulated angling stress that was induced through manual chasing. This challenge elicited the traditional physiological responses such as ion homeostasis disturbance, increases in secondary stress indicators and metabolic acidosis; however, environmental salinity altered the timing of recovery in some of the parameters measured. In addition, the severity of the intracellular pH disturbance in both heart and red blood cell seemed to be mediated in fresh water, yet the recovery pattern of plasma chloride and bicarbonate ions seemed to be facilitated by higher salinity. In general, responses were similar but not identical, leading us to conclude that the role of salinity on recovery from exercise is complex but not insignificant. Salinity may be important to behaviours exhibited by white sturgeon (such as migrations) in their respective saline environments, but less so around the impact of an angling stressor. Further exploration of this response may provide insight on whether the current tidal boundaries for angling white sturgeon are appropriate.
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Affiliation(s)
- Ryan B Shartau
- Corresponding author: Department of Biology, The University of Texas at Tyler, 3900 University Blvd., Tyler, Texas, United States 75799.
| | - Jacelyn Shu
- Department of Zoology, University of British Columbia, 4200 - 6270 University Blvd., Vancouver, British Columbia, Canada V6T 1Z4
| | - Daniel W Baker
- Department of Fisheries and Aquaculture, Vancouver Island University, 900 Fifth Street, Nanaimo, British Columbia, Canada, V9R 5S5
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Roberts SM, Boustany AM, Halpin PN. Substrate-dependent fish have shifted less in distribution under climate change. Commun Biol 2020; 3:586. [PMID: 33067547 PMCID: PMC7567839 DOI: 10.1038/s42003-020-01325-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 09/22/2020] [Indexed: 11/23/2022] Open
Abstract
Analyses of the impacts of climate change on fish species have primarily considered dynamic oceanographic variables that are the output of predictive models, yet fish species distributions are determined by much more than just variables such as ocean temperature. Functionally diverse species are differentially influenced by oceanographic as well as physiographic variables such as bottom substrate, thereby influencing their ability to shift distributions. Here, we show that fish species distributions that are more associated with bottom substrate than other dynamic environmental variables have shifted significantly less over the last 30 years than species whose distributions are associated with bottom salinity. Correspondingly, species whose distributions are primarily determined by bottom temperature or ocean salinity have shifted their mean centroid and southern and northern range boundaries significantly more than species whose distributions are determined by substrate or depth. The influence of oceanographic versus static variables differs by species functional group, as benthic species distributions are more associated with substrate and they have shifted significantly less than pelagic species whose distributions are primarily associated with ocean temperatures. In conclusion, benthic fish, that are more influenced by substrate, may prove much less likely to shift distributions under future climate change.
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Affiliation(s)
- Sarah M Roberts
- Marine Geospatial Ecology Lab, Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC, 27708, USA.
| | - Andre M Boustany
- Monterey Bay Aquarium, 886 Cannery Row, Monterey, CA, 93940, USA
| | - Patrick N Halpin
- Marine Geospatial Ecology Lab, Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC, 27708, USA
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Lin CY, Huang LH, Deng DF, Lee SH, Liang HJ, Hung SSO. Metabolic adaptation to feed restriction on the green sturgeon (Acipenser medirostris) fingerlings. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 684:78-88. [PMID: 31150878 DOI: 10.1016/j.scitotenv.2019.05.044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/03/2019] [Accepted: 05/04/2019] [Indexed: 06/09/2023]
Abstract
Food restriction may cause severe biological effects on wildlife and lead to population decline and extinction. The objective of the current study was to examine the metabolic effects on green sturgeon in response to feed restriction. Green sturgeon fingerlings were fed for two weeks at 12.5, 25, 50 and 100% of the optimum feeding rate (OFR), which corresponded to 0.25, 0.50, 1.00, and 2.00% body weight per day. We characterized the changes in hydrophilic and hydrophobic metabolites from extracts of muscle, liver, and kidney using nuclear magnetic resonance spectroscopy followed by multivariate statistical analysis. The results of principal component analysis (PCA) score plots from the analyses of hydrophilic metabolites showed that they exhibited a greater response to feed restriction than hydrophobic metabolites. In general, the hydrophilic metabolites in tissues from fish fed ≦25% of the OFR were separated from those fed 100% of the OFR in the PCA score plots. Among the three types of tissues examined, the overall metabolite changes showed a greater response to feed restriction in kidney tissue than in liver or muscle tissues. Numerous glucogenic amino acids in muscle and most amino acids in the kidney were decreased under feed restriction conditions. A significant decrease in ketone bodies (3-hydroxyisobutyrate) was observed in the muscle. Most fatty acids except for glycerol, phospholipid and cholesterol in the liver and kidney tissues were decreased under feed restriction conditions. Creatine phosphate, taurine and glycine were also significantly increased in tissues under feed restriction conditions. In conclusion, this study suggests that the manipulation of feed restriction under the current conditions perturbed metabolites related to energy metabolism, osmolality regulation, and antioxidation capacity in the sturgeon.
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Affiliation(s)
- Ching-Yu Lin
- Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan, ROC.
| | - Lu-Hsueh Huang
- Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan, ROC
| | - Dong-Fang Deng
- School of Freshwater Sciences, University of Wisconsin, Milwaukee, WI 53204, USA
| | - Sheng-Han Lee
- Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan, ROC
| | - Hao-Jan Liang
- Institute of Environmental Health, College of Public Health, National Taiwan University, Taipei, Taiwan, ROC
| | - Silas S O Hung
- Department of Animal Science, University of California, Davis 95616, USA
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Rodgers EM, Poletto JB, Gomez Isaza DF, Van Eenennaam JP, Connon RE, Todgham AE, Seesholtz A, Heublein JC, Cech JJ, Kelly JT, Fangue NA. Integrating physiological data with the conservation and management of fishes: a meta-analytical review using the threatened green sturgeon ( Acipenser medirostris). CONSERVATION PHYSIOLOGY 2019; 7:coz035. [PMID: 31281658 PMCID: PMC6601218 DOI: 10.1093/conphys/coz035] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 04/26/2019] [Accepted: 05/20/2019] [Indexed: 05/04/2023]
Abstract
Reversing global declines in the abundance and diversity of fishes is dependent on science-based conservation solutions. A wealth of data exist on the ecophysiological constraints of many fishes, but much of this information is underutilized in recovery plans due to a lack of synthesis. Here, we used the imperiled green sturgeon (Acipenser medirostris) as an example of how a quantitative synthesis of physiological data can inform conservation plans, identify knowledge gaps and direct future research actions. We reviewed and extracted metadata from peer-reviewed papers on green sturgeon. A total of 105 publications were identified, spanning multiple disciplines, with the primary focus being conservation physiology (23.8%). A meta-analytical approach was chosen to summarize the mean effects of prominent stressors (elevated temperatures, salinity, low food availability and contaminants) on several physiological traits (growth, thermal tolerance, swimming performance and heat shock protein expression). All examined stressors significantly impaired green sturgeon growth, and additional stressor-specific costs were documented. These findings were then used to suggest several management actions, such as mitigating salt intrusion in nursery habitats and maintaining water temperatures within optimal ranges during peak spawning periods. Key data gaps were also identified; research efforts have been biased towards juvenile (38.1%) and adult (35.2%) life-history stages, and less data are available for early life-history stages (embryonic, 11.4%; yolk-sac larvae, 12.4%; and post yolk-sac larvae, 16.2%). Similarly, most data were collected from single-stressor studies (91.4%) and there is an urgent need to understand interactions among stressors as anthropogenic change is multi-variate and dynamic. Collectively, these findings provide an example of how meta-analytic reviews are a powerful tool to inform management actions, with the end goal of maximizing conservation gains from research efforts.
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Affiliation(s)
- Essie M Rodgers
- Wildlife, Fish and Conservation Biology, University of California Davis, One Shields Ave., Davis, CA, USA
| | - Jamilynn B Poletto
- School of Natural Resources, University of Nebraska-Lincoln, 3310 Holdrege St., Lincoln, NE, USA
| | - Daniel F Gomez Isaza
- School of Biological Sciences, The University Queensland, Brisbane, QLD, Australia
| | - Joel P Van Eenennaam
- Department of Animal Science, University of California Davis, One Shields Ave., Davis, CA, USA
| | - Richard E Connon
- Department of Anatomy, Physiology and Cell Biology, University of California Davis, One Shields Ave., Davis, CA, USA
| | - Anne E Todgham
- Department of Animal Science, University of California Davis, One Shields Ave., Davis, CA, USA
| | - Alicia Seesholtz
- California Department of Water Resources, Industrial Blvd., West Sacramento, CA, USA
| | - Joe C Heublein
- NOAA National Marine Fisheries Program, West Coast Region, Capital Mall, Sacramento, CA, USA
| | - Joseph J Cech
- Wildlife, Fish and Conservation Biology, University of California Davis, One Shields Ave., Davis, CA, USA
| | - John T Kelly
- Fisheries Branch, California Department of Fish and Wildlife, Sacramento, CA, USA
| | - Nann A Fangue
- Wildlife, Fish and Conservation Biology, University of California Davis, One Shields Ave., Davis, CA, USA
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Moniruzzaman M, Mukherjee J, Jacquin L, Mukherjee D, Mitra P, Ray S, Chakraborty SB. Physiological and behavioural responses to acid and osmotic stress and effects of Mucuna extract in Guppies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:37-46. [PMID: 30031943 DOI: 10.1016/j.ecoenv.2018.07.053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/11/2018] [Accepted: 07/13/2018] [Indexed: 06/08/2023]
Abstract
Variation in pH (acidification) and salinity conditions have severe impact at different levels of biological organization in fish. Present study focused to assess the effects of acidification and salinity changes on physiological stress responses at three different levels of function: i) hormonal and oxidative response, ii) osmoregulation and iii) reproduction, in order to identify relevant biomarkers. Second objective of the study was to evaluate the efficacy of plant (Mucuna pruriens) extract for alleviating pH and salinity related stress. Guppies (Poecilia reticulata) were exposed to different pH (6.0, 5.5, 5.0) and salinity (1.5, 3.0, 4.5 ppt) for 7, 14 and 21 days. Following exposure to stress for respective duration, fish were fed diet containing methanol extract of Mucuna seeds (dose 0.80 gm/kg feed) for 7, 14 and 21 days to measure their possible recovery response. Stress hormone (cortisol), hepatic oxidative stress parameters [superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GRd), glutathione peroxidise (GPx), glutathione S-transferase (GST), malondialdehyde (MDA), glutathione (GSH)], gill osmoregulatory response (Na+-K+ATPase activity), sex steroid profiles and mating behaviours (gonopodial thrust and gestation period) were estimated. Cortisol and MDA levels increased with dose and duration of acid and salinity stress, and cortisol levels were higher in males than in females. Effect on Na+-K+ATPase activity was more intense by salinity stress rather than pH induced stress. Both acid and salinity stress reduced sex steroid levels, and mating response was highly affected by both stresses in a dose- and duration-dependent manner. Mucuna treatment reduced stress-induced alteration of cortisol, MDA, Na+-K+ATPase activity and reproductive parameters. Dietary administration of Mucuna seed extract decreased the intensity of environmental stressors at all three functional levels. Mucuna treatment was more effective against salinity stress than acid stress. Thus, cortisol, oxidative stress marker MDA and Na+-K+ATPase could be effective indicators for acid and salinity stress in wild and domestic fish populations. Dietary administration of Mucuna extract may limit the detrimental effects of acidification and salinity variations that are the inevitable outcomes expected under global climate change conditions.
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Affiliation(s)
- Mahammed Moniruzzaman
- Fish Endocrinology Research Unit, Department of Zoology, University of Calcutta, Kolkata 700019, India
| | - Joyita Mukherjee
- Department of Zoology, Krishna Chandra College, University of Burdwan, Hetampur, Birbhum 731124, West Bengal, India
| | - Lisa Jacquin
- Laboratoire Evolution & Diversité Biologique EDB, UMR 5174, Université de Toulouse, UPS, CNRS, IRD, 118 route de Narbonne, 31062 Toulouse, France
| | - Debosree Mukherjee
- Fish Endocrinology Research Unit, Department of Zoology, University of Calcutta, Kolkata 700019, India
| | - Pubali Mitra
- Fish Endocrinology Research Unit, Department of Zoology, University of Calcutta, Kolkata 700019, India
| | - Santanu Ray
- Ecological Modeling Laboratory, Department of Zoology, Visva-Bharati University, Santiniketan 731235, India
| | - Suman Bhusan Chakraborty
- Fish Endocrinology Research Unit, Department of Zoology, University of Calcutta, Kolkata 700019, India.
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Hung SS. Recent advances in sturgeon nutrition. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2017; 3:191-204. [PMID: 29767119 PMCID: PMC5941233 DOI: 10.1016/j.aninu.2017.05.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/07/2017] [Accepted: 05/12/2017] [Indexed: 11/23/2022]
Abstract
Sturgeons are fish species of biological and economical importance, and most of them are endangered, vulnerable or rare because of their large size, late sexual maturity, long period between spawning, and longevity. These unique biological characteristics make them highly susceptible to overfishing, degradation of habitat and spawning ground, and contamination of water and sediments by pollutants. The objective of the current review is not to exhaustively include all studies on sturgeon nutrient requirements and utilizations conducted under laboratory conditions, but to critique some studies and update previous reviews. The goal is to provide a basis for recommendations for future research so that these important fish species can be managed and produced sustainably. Energy, protein, lipid carbohydrate, vitamin, and mineral requirements and utilizations were reviewed or critiqued. Future studies to develop suitable chemically defined diets to support good growth of sturgeon are urgently needed. Furthermore, future experiments should be designed systematically with more consideration on within and among studies and within and among different species of sturgeon. Finally, future experiments should be designed with a systematic approach with multiple doses (inputs) and multiple responses (outputs) at several levels of hierarchical organization in a biological system using traditional biochemical and modern molecular techniques and computer modeling with proper experimental design and methodology. This approach will provide a more realistic and holistic understanding of the mechanisms of nutrient requirements and utilizations, which will help us better manage wild sturgeon stocks and produce sturgeon more efficiently and sustainably under aquaculture conditions.
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Effects of feed restriction on the upper temperature tolerance and heat shock response in juvenile green and white sturgeon. Comp Biochem Physiol A Mol Integr Physiol 2016; 198:87-95. [DOI: 10.1016/j.cbpa.2016.04.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 04/13/2016] [Accepted: 04/14/2016] [Indexed: 11/17/2022]
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