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7 results for “Pacific herring”
Disentangling abiotic and biotic controls of age-0 Pacific herring population stability across the San Francisco Estuary
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Data from: Population structure and persistence of Pacific herring following the Great Tohoku earthquake
We evaluated the effect of the Great Tohoku earthquake, which occurred on March 11, 2011 in Japan, on the genetic diversity and population structure of Pacific herring (Clupea pallasii). Pacific herring (n = 4466) were collected between 2003 and 2014 through more than 20 sampling events during spawning periods at nine spawning sites throughout the Pacific herring distribution range in Japan. We measured them and genotyped 3784 fish at five microsatellite loci. Following the tsunami, the sea-spawning population at the center of the affected area was almost extirpated and was replaced by a genetically distinct lagoon-spawning population from an adjacent brackish lake. However, the pattern of gene flow was stable for populations, with unique admixture proportions in local populations despite the high gene flow (FST = 0.0184). Our results indicate that Pacific herring in Japan spawn in a range of salinities and exchange genes between local populations regardless of the spawning ecotypes. We hypothesize that the combination of constant gene flow between local populations from straying of spawners and spawning fidelity creates weak but significantly differentiated stable population structure. This process can allow restoration of the genetic characteristics of damaged populations over many generations and can thereby promote the long-term viability of marine fishes that have high gene flow.
Experimental data testing CO2 × heatwave effects in Pacific herring offspring including data on vital rates and experimental conditions
<p>Forage fish tend to respond strongly to environmental variability and therefore may be particularly sensitive to marine climate stressors. We used controlled laboratory experiments to assess the vulnerability of Pacific herring (<em>Clupea pallasii</em>) embryos to the combined effects of high <em>p</em>CO<sub>2</sub> and a simulated marine heatwave. The two <em>p</em>CO<sub>2</sub> treatments reflected current conditions (~550 µatm) and a future extreme level (~2,300 µatm). The dynamics of heatwave (i.e., rate of onset: ~0.85°C d-<sup>1</sup>; maximum intensity: +4.4°C) were modeled from the most extreme events detected by a long-term regional temperature dataset. Simultaneous exposure to these potential stressors did not affect embryo survival. However, the heatwave did elicit significant metabolic effects that included higher rates of routine metabolism (Q<sub>10</sub> = 1.15 - 1.72), growth (Q<sub>10</sub> = 1.87), rate of development to hatch (Q<sub>10</sub> = 3.01), and yolk consumption (Q<sub>10</sub> = 3.21) as well as a significant reduction in production efficiency (-10.8%) and a three-fold increase in the rate of developmental anomalies. By contrast, high <em>p</em>CO2 conditions produced comparatively small effects to vital rates, including a significant increase in time to hatch (+0.88 d) and a reduction in routine metabolic rate (-6.3%) under the ambient temperature regime only. We found no evidence that high <em>p</em>CO2 increased routine metabolic rate at either temperature. These results indicate that Pacific herring embryos possess sufficient physiological plasticity to cope with extreme seawater acidification under optimal and heatwave temperature conditions, although lingering metabolic inefficiencies induced by the heatwave may lead to important carry-over effects in later life-stages.</p>
Experimental data from long-term elevated pCO2 exposure in Pacific herring. Datasets include measurements of enviromental treatment conditions, growth and developmental traits, and mortality data from a disease challenge.
<p>This study evaluated the effects of ocean acidification on the health, survival, fitness, and disease susceptibility of early life stage Pacific herring. Wild larvae were reared from hatching under three pCO2 treatments [low (~650 μatm), intermediate (~1,500 μatm), and high (~3,000 μatm)] to determine the effects of elevated pCO2 on larval growth, yolk consumption, and foraging capabilities and to evaluate how chronic exposure to elevated pCO2 affects long-term growth and maximum swimming speed. After prolonged exposure (98 d), we tested how elevated pCO2 experienced during development altered the susceptibility of juvenile Pacific herring to VHS following water-borne exposure to VHSV. This directory includes datasets for: 1) daily pH and temperature measurements from replicate rearing tanks; 2) carbon chemistry measurements from discrete seawater samples; 3) morphometric and feeding data for larval herring (1 - 16 days post hatch); 4) standard length measurements from larval and juvenile samples (1 - 98 days post hatch); 5) All dry mass measurements from larval and juvenile samples (1 - 98 days post hatch); 6) survival statistics for whole experiment ( 1- 98 days post hatch); 7) maximum swim speed measurements on juvenile herring; 8) disease challenge mortality and viral titer data; 8) a README file containing information on the dataset. </p>
Data from: Population structure and persistence of Pacific herring following the Great Tohoku earthquake
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Experimental data testing CO2 × heatwave effects in Pacific herring offspring including data on vital rates and experimental conditions
Open the record for dataset details and reuse information.
Data from: Phylogeography of amphi-boreal fish: tracing the history of the Pacific herring Clupea pallasii in North-East European seas
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