Changes in age composition and growth characteristics of Atlantic sturgeon (
            <i>Acipenser oxyrinchus oxyrinchus</i>
            ) over 400 years

Balazik, Matthew T.; Garman, Greg C.; Fine, Michael L.; Häger, Christian; McIninch, Stephen P.

doi:10.1098/rsbl.2010.0144

Cited by 22 publications

(21 citation statements)

References 17 publications

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“…For example, differences in productivity of stocks have been related to differences in temperature (Dutil and Brander 2003), and warming associated with global climate change was suggested to explain differences in the growth dynamics of a long-lived fish based on comparisons between colonial and modern samples (Balazik et al 2010). Impacts of temperature could be explained through several mechanisms.…”

Section: Resultsmentioning

confidence: 98%

Climatic effects on the growth of a temperate reef fish from the Southern Hemisphere: a biochronological approach

et al. 2012

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Increments in the hard parts of marine organisms (otoliths, skeletons, shells) can provide long-term chronologies of growth analogous to tree rings. For the first time in the Southern Hemisphere, we use a dendrochronological (tree-ring analysis) approach to develop a multidecadal chronology of growth for a temperate reef fish, Girella tricuspidata, from the coast of northern New Zealand. Growth patterns in the otoliths of this species were strongly synchronous among individual fish over a period spanning 27 years . We then compared our otolith chronology to climatic records and found strong positive correlations of growth with sea surface temperature, and weak negative correlations with the multivariate El Nino Southern Oscillation (ENSO) index. Strongest correlations were found between summer sea surface temperature and otolith growth. This relationship was consistent across all years and explained 44 % of the variation (y = -2.0 ? 0.1785 9 temperature, r 2 = 0.4367, P = 0.0002) in the G. tricuspidata growth chronology. Our study illustrates how otolith chronologies provide remarkable records of annual growth patterns over decadal time scales that will be useful for forecasting the likely effects of climate change on marine ecosystems.

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Section: Resultsmentioning

confidence: 98%

Climatic effects on the growth of a temperate reef fish from the Southern Hemisphere: a biochronological approach

et al. 2012

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“…Similarly, recent studies by Butler and colleagues revealed stable β cell mass across the adult human life span (28). Notably, some organisms such as specific kinds of Osteichthyes (bony fish) exhibit slow somatic growth that continues well after sexual maturity; sturgeon continue to grow slowly decades after sexual maturity (64). Could adult human β cells similarly harbor a capacity to slowly expand into adulthood?…”

Section: Figurementioning

confidence: 99%

The role of aging upon β cell turnover

2013

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Preservation and regeneration of β cell endocrine function is a long-sought goal in diabetes research. Defective insulin secretion from β cells underlies both type 1 and type 2 diabetes, thus fueling considerable interest in molecules capable of rebuilding β cell secretion capacity. Though early work in rodents suggested that regeneration might be possible, recent studies have revealed that aging powerfully restricts cell cycle entry of β cells, which may limit regeneration capacity. Consequently, aging has emerged as an enigmatic challenge that might limit β cell regeneration therapies. This Review summarizes recent data regarding the role of aging in β cell regeneration and proposes models explaining these phenomena.

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“…The James River is the southernmost major tributary to the Chesapeake Bay. Historically, the James River supported a large population of Atlantic sturgeon, but loss of spawning habitat and overfishing coincided with dramatic in-system declines throughout the 19th and 20th centuries (Smith 1985;Balazik et al 2010). Observations in the 1990s of subadults caught by commercial fishers, as well as rare discoveries of dead adult Atlantic sturgeon in the James River (A. Spells, U.S.…”

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confidence: 99%

Age and Growth of Atlantic Sturgeon in the James River, Virginia, 1997–2011

et al. 2012

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Historically the Chesapeake Bay supported a large population of Atlantic sturgeon Acipenser oxyrinchus, but loss of suitable spawning habitat and overfishing coincided with dramatic in‐system declines throughout the 20th century. Atlantic sturgeon harvest moratoriums were implemented in 1974 for Virginia waters and were expanded coastwide in 1998. In 1997, researchers became aware that commercial fishers in the James River, a tributary of the Chesapeake Bay, were catching juvenile and subadult Atlantic sturgeon as bycatch in various fisheries. Genetic studies showed that the Chesapeake Bay population has maintained genetic integrity and qualifies as a distinct population segment. Between 2007 and 2011, almost 150 adults have been caught in the tidal–freshwater portion of the James River during putative spawning runs. Pectoral fin spines from juveniles and subadults collected in the Burwell Bay (rkm 40) and Cobham Bay (rkm 60) areas and mature adult samples from vessel strikes in freshwater around or above rkm 120 were analyzed to create a length‐at‐age curve for Atlantic sturgeon in the James River. Five models were used to analyze the data, and the double von Bertalanffy (k1 = 0.054, k2 = 0.097, t1 = −2.85, t2 = 1.09, tp = 6.03 years, L∞ = 2241 mm) provided the best fit to the observed data. We estimated an increase in growth coefficient at tp, which could be an artifact of low sample size or due to ontogenetic changes in habitat use as older fish spend more time in oceanic waters than younger fish. Atlantic sturgeon in the 6–9 year age range are rarely encountered in the James River compared with younger and older age‐classes, so a more in‐depth analysis of the increased growth coefficient would require ocean sampling.

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Changes in age composition and growth characteristics of Atlantic sturgeon ( Acipenser oxyrinchus oxyrinchus ) over 400 years

Cited by 22 publications

References 17 publications

Climatic effects on the growth of a temperate reef fish from the Southern Hemisphere: a biochronological approach

Climatic effects on the growth of a temperate reef fish from the Southern Hemisphere: a biochronological approach

The role of aging upon β cell turnover

Age and Growth of Atlantic Sturgeon in the James River, Virginia, 1997–2011

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