Genetic Variation and Management of Striped Bass Populations in the Coastal Rivers of South Carolina

Bulak, James S.; Thomason, Christopher S.; Han, Kaiping; Ely, Bert

doi:10.1577/m03-039.1

Cited by 6 publications

(4 citation statements)

References 18 publications

(1 reference statement)

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“…Because AMS, when expressed as a function of temperature, typically takes the approximate form of a bell-shaped curve that aligns with organismal performance (Neill and Bryan, 1991;Pörtner and Farrell, 2008;Pörtner, 2010), we predicted that 1) SMR would increase with increasing temperature; 2) MMR, AMS, and exhaustion time would be greatest at 25°C and would be lower at 20°C and 32°C, consistent with the recorded temperature preference for juveniles (Coutant and Carrol, 1980;Coutant et al, 1984); and 3) MMR, AMS, and exhaustion time would decrease with decreasing DO concentration. Hypotheses 2 and 3 are consistent with observations that striped bass avoid DO levels less than 3.0 mg/L and prefer temperatures less than 30°C (Zale et al, 1990;Bjorgo et al, 2000;Schaffler et al, 2002).…”

supporting

confidence: 84%

“…However, the coastal rivers and estuaries that some southern populations inhabit do not have the degree of thermal refuge of inland impoundments. In a coastal river of South Carolina, Bjorgo et al (2000) observed that striped bass chose habitats with temperatures of 25-27°C during periods when downstream habitats were as much as 5°C higher. Striped bass will select habitats with water that is warmer than their preferred range when DO concentration is low in cooler water (Farquhar and Gutreuter, 1989).…”

mentioning

confidence: 99%

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Effects of temperature and hypoxia on the metabolic performance of juvenile striped bass (Morone saxatilis)

Anweiler¹,

Brenkert²,

Darden³

et al. 2019

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Striped bass (Morone saxatilis) found in estuaries and rivers of North America face many environmental challenges. These challenges may have led to local extirpations of striped bass, as has been observed in the Ashley River in South Carolina. The link between environmental challenges and extirpation may be physiological capacities, such as standard metabolic rate (SMR), maximum metabolic rate (MMR), and aerobic metabolic scope (AMS). The objective of this study was to determine the effect of temperature and oxygen availability on the metabolic capacities of striped bass, thereby assessing the physiological capability for survival under varying environmental conditions. After being acclimated to water temperatures of 20°C, 25°C, and 32°C, striped bass swam at their acclimation temperature while being acutely exposed to dissolved oxygen (DO) levels of 2.5, 3.0, and 4.0 mg/L. The highest values of SMR, MMR, and AMS were observed at 32°C, a temperature approaching the upper lethal limit. The MMR, AMS, and exhaustion time were significantly reduced at DO concentrations below 4.0 mg/L. These results indicate that juvenile striped bass are metabolically limited as DO concentrations fall below 4.0 mg/L. However, juvenile striped bass in the Ashley River may be minimally affected by this potential challenge because these conditions are rarely observed.

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supporting

confidence: 84%

mentioning

confidence: 99%

Effects of temperature and hypoxia on the metabolic performance of juvenile striped bass (Morone saxatilis)

Anweiler¹,

Brenkert²,

Darden³

et al. 2019

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“…Tagging studies indicate that the Santee–Cooper population of striped bass is completely isolated from other coastal populations (Bulak et al. 2004).…”

Section: Discussionmentioning

confidence: 99%

“…saxatilis is found in the Santee–Cooper system, South Carolina, USA (Scruggs 1957), which was landlocked because of the construction of two dams that impounded Lake Moultrie and Lake Marion. A fish ladder and a lock system have reconnected the lake populations with the Santee and Cooper River populations, but tagging studies show that this and all other South Carolina striped bass populations naturally avoid salt water (Bulak et al. 2004).…”

Section: Introductionmentioning

confidence: 99%

Sibship reconstruction demonstrates the extremely low effective population size of striped bass Morone saxatilis in the Santee–Cooper system, South Carolina, USA

Liu

Ely

2009

Molecular Ecology

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For organisms with great fecundity and high mortality in early life stages, such as shellfish or fishes, the need to match reproductive activity with environmental conditions conducive to spawning, fertilization, larval development and recruitment may result in extreme variance in reproductive success among individuals. The main objective of this study was to investigate evidence of large variance in the reproductive success of the striped bass Morone saxatilis in the Santee-Cooper system, South Carolina, USA. Seven microsatellite loci were analysed in 603 recruits representing three yearly cohorts from 1992 to 1994, and a group analysis was performed to identify full-sib families. Large variance in reproductive success was detected, with a few large, full-sib families contributing disproportionately to each of the cohorts. The severity of sweepstakes reproductive success varied among cohorts depending on environmentally imposed mortality. Estimations of the effective number of breeders in these long-lived fish ranged from 24 in 1992 to 44 in 1994. Furthermore, the estimated genetic effective population size (N(e) = 93) is approximately four orders of magnitude lower than estimates of adult census size (N = 362 000). Furthermore, the presence of large full-sib families indicates that striped bass engage in pair mating in the wild. Heterogeneity in genetic composition was also observed among cohorts, suggesting that genetically different adults contribute to different cohorts and that chance rather than fitness variation determines reproductive success.

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Genetic Structure of Striped Bass in the Southeastern United States and Effects from Stock Enhancement

Anderson

Denson

Darden

2014

N American J Fish Manag

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Understanding the genetic relationships of Striped Bass Morone saxatilis populations within and between watersheds is necessary to identify appropriate management units. Determining temporal changes in genetic relationships as well as the genetic diversity of the populations is important in understanding how stock enhancement influences population units. A suite of 12 microsatellites was used to evaluate patterns of Striped Bass gene flow both spatially and temporally across watersheds in the southeastern United States. Populations from the study watersheds were genetically diverse with the exception of the Savannah River, South Carolina–Georgia, which is recovering from a major population decline. Striped Bass in the Roanoke and Cape Fear rivers, North Carolina, represented a single population, most likely due to historical transfer stocking across the state from Roanoke River stock. Watersheds in South Carolina contained genetically distinct Striped Bass populations, although the difference between Striped Bass populations in the Ashepoo–Combahee–Edisto (ACE) and Santee–Cooper watersheds has decreased over the past 15 years, likely due to the stocking of Santee–Cooper system fish into the ACE Basin. Conversely, supportive breeding of fish from the Santee–Cooper system has helped to maintain genetic diversity of the population. Striped Bass populations in the southeastern United States are good examples of the positive and negative effects of stock enhancement that must be considered and monitored when implementing or assessing a stock enhancement program. Received May 14, 2013; accepted March 5, 2014

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Genetic Variation and Management of Striped Bass Populations in the Coastal Rivers of South Carolina

Cited by 6 publications

References 18 publications

Effects of temperature and hypoxia on the metabolic performance of juvenile striped bass (Morone saxatilis)

Effects of temperature and hypoxia on the metabolic performance of juvenile striped bass (Morone saxatilis)

Sibship reconstruction demonstrates the extremely low effective population size of striped bass Morone saxatilis in the Santee–Cooper system, South Carolina, USA

Genetic Structure of Striped Bass in the Southeastern United States and Effects from Stock Enhancement

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