Short term and long term physio-biochemical adaptations of the Japanese eel (Anguilla Japonica, Temminck & Schlegel) to temperature changes

The behavior of Griesgletscher, Switzerland, is studied by application of a numerical model of temperate glacier flow. The analysis addresses the possible danger posed to a hydroelectric dam which is 600 m from the calving terminus of the glacier. Model parameters are adjusted to fit data collected over eleven years. A calving law relating the calving flux to the water depth at the front provides a good fit of the data. Assuming a continuation of the present climate, the terminus is predicted to retreat 200 m over the next forty years, followed by an advance of 150 m lasting several centuries. Numerous experimental climate alterations show that the dam will not be threatened by short-term climatic changes. A long-term mass-balance increase of 0.12 m of ice per year (or a drop of 0.2°C in mean annual air temperature) would be sufficient to fill the reservoir with ice. With an additional increase of 0.07 m of ice per year the terminus would reach the dam. Data from the 1923 and 1850 moraines are used to suggest lower-bound estimates of temperature changes (-0.4 and -0.6°C respectively) during these periods of glacial maxima.

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Impact of long-term habitat loss on the Japanese eel Anguilla japonica

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2014.06.004 ◽

2014 ◽

Vol 151 ◽

pp. 361-369 ◽

Cited By ~ 37

Author(s):

Jian-Ze Chen ◽

Shiang-Lin Huang ◽

Yu-San Han

Keyword(s):

Habitat Loss ◽

Anguilla Japonica ◽

Japanese Eel

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Effects of Water Temperature Changes on the Oxygen Consumption Rhythm in the Japanese eel, Anguilla japonica

Journal of Environmental Science International ◽

10.5322/jes.2011.20.8.943 ◽

2011 ◽

Vol 20 (8) ◽

pp. 943-951

Author(s):

Jong-Wook Kim ◽

Tae-Won Lee ◽

Il Noh ◽

Wan-Soo Kim

Keyword(s):

Oxygen Consumption ◽

Water Temperature ◽

Anguilla Japonica ◽

Japanese Eel ◽

Temperature Changes

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The Predicted Behavior of Griesgletscher, Wallis, Switzerland, and its Possible Threat to a Nearby Dam (Abstract only)

Annals of Glaciology ◽

10.3189/s0260305500005632 ◽

1983 ◽

Vol 4 ◽

pp. 295-295 ◽

Cited By ~ 1

Author(s):

Robert Bindschadler

Keyword(s):

Climatic Changes ◽

Model Parameters ◽

Present Climate ◽

Short Term ◽

Additional Increase ◽

Temperature Changes ◽

Hydroelectric Dam ◽

Glacier Flow ◽

Mean Annual Air Temperature

The behavior of Griesgletscher, Switzerland, is studied by application of a numerical model of temperate glacier flow. The analysis addresses the possible danger posed to a hydroelectric dam which is 600 m from the calving terminus of the glacier. Model parameters are adjusted to fit data collected over eleven years. A calving law relating the calving flux to the water depth at the front provides a good fit of the data. Assuming a continuation of the present climate, the terminus is predicted to retreat 200 m over the next forty years, followed by an advance of 150 m lasting several centuries. Numerous experimental climate alterations show that the dam will not be threatened by short-term climatic changes. A long-term mass-balance increase of 0.12 m of ice per year (or a drop of 0.2°C in mean annual air temperature) would be sufficient to fill the reservoir with ice. With an additional increase of 0.07 m of ice per year the terminus would reach the dam. Data from the 1923 and 1850 moraines are used to suggest lower-bound estimates of temperature changes (-0.4 and -0.6°C respectively) during these periods of glacial maxima.

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Emergence of Cross-Generational Migration Behavior in Multiagent Simulation

Journal of Advanced Computational Intelligence and Intelligent Informatics ◽

10.20965/jaciii.2009.p0304 ◽

2009 ◽

Vol 13 (3) ◽

pp. 304-311

Author(s):

Hideki Hashizume ◽

◽

Atsuko Mutoh ◽

Shohei Kato ◽

Tsutomu Kunitachi ◽

...

Keyword(s):

Environmental Changes ◽

Monarch Butterfly ◽

Environmental Adaptation ◽

Migration Behavior ◽

Short Term ◽

Temperature Changes ◽

Genetic Components ◽

Term Change ◽

Change Temperature

We describe an artificial ecosystem consisting of five areas and evolving artificial creatures (called agents). The ecosystem is for an analysis of cross-generational migrations of the monarch butterfly. The monarch butterfly is famous for its migration. We report simulations on the emergence of migration behavior pertaining to the monarch butterfly. The area has two kinds of environmental changes: long-term and short-term changes. We focus on temperature as an environmental parameter. Under long-term change, temperature is gradually rising, and under short-term change temperature changes periodically as same as seasonal change. We put agents on the areas. The agent has two genetic components: an environmental adaptation scale and an action decision table. These components represent the physical features of the agent and select an action on the basis of sensory information, respectively. The agent also has a temperature sensor that functions with its environmental adaptation scale. It enables the agent to adapt dynamic temperature changes and to evolve to obtain optimal behaviors. With the ecosystem, we conduct one experiment. The result was that we observed that the range of migration expanded as the temperature rose. Also, we report the result of migration patterns obtained by the agents. These results show that the biology of the monarch butterfly is well modeled by the ecosystem and our evolutionary method.

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Trans-omics analyses revealed differences in hormonal and nutritional status between wild and cultured female Japanese eel (Anguilla japonica)

10.1101/483834 ◽

2018 ◽

Author(s):

Masato Higuchi ◽

Miyuki Mekuchi ◽

Takeshi Hano ◽

Hitoshi Imaizumi

Keyword(s):

Anguilla Japonica ◽

Japanese Eel ◽

Sex Hormone Binding Globulin ◽

Carbohydrate Diet ◽

High Accumulation ◽

Commercial Diet ◽

High Carbohydrate ◽

The Brain ◽

Estradiol 17Β

AbstractLong-term stock decline in the Japanese eel (Anguilla japonica) is a serious issue. To reduce natural resource utilization in Japan, artificial hormonal induction of maturation and fertilization in the Japanese eel has been intensively studied. Recent experiment on feminized (by feeding a commercial diet containing estradiol-17β for first half year) cultured eels have shown ovulation problem, which is seldom observed in captured wild eels. In this study, we tried to investigate causes of ovulation problem frequently seen in cultured eels by comparative trans-omics analyses.The omics data showed low growth hormone and luteinizing hormone transcription levels in the brain and low sex hormone–binding globulin transcription levels in the liver of the cultured eels. In addition, we found high accumulation of glucose-6-phosphate and, maltose in the cultured eel liver. We also found that docosahexaenoic (DHA) acid, eicosapentaenoic acid (EPA) and arachidonic acid (ARA) ratios in cultured eels were quite different from wild eels.The data suggested that ovulation problem is due to prolonged intake of a high-carbohydrate diet and/or unbalanced DHA/EPA/ARA ratios in diet.

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Conceptual short-term memory (CSTM) supports core claims of Christiansen and Chater

Behavioral and Brain Sciences ◽

10.1017/s0140525x15000928 ◽

2016 ◽

Vol 39 ◽

Author(s):

Mary C. Potter

Keyword(s):

Working Memory ◽

Rapid Serial Visual Presentation ◽

Language Comprehension ◽

Short Term Memory ◽

Visual Presentation ◽

Long Term Memory ◽

Short Term ◽

Term Memory ◽

Use Of Knowledge

AbstractRapid serial visual presentation (RSVP) of words or pictured scenes provides evidence for a large-capacity conceptual short-term memory (CSTM) that momentarily provides rich associated material from long-term memory, permitting rapid chunking (Potter 1993; 2009; 2012). In perception of scenes as well as language comprehension, we make use of knowledge that briefly exceeds the supposed limits of working memory.

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Ultrastructural investigations of MDL 19,660-induced effects on the canine platelet and megakaryocyte

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100159412 ◽

1990 ◽

Vol 48 (3) ◽

pp. 374-375

Author(s):

D.E. Loudy ◽

J. Sprinkle-Cavallo ◽

J.T. Yarrington ◽

F.Y. Thompson ◽

J.P. Gibson

Keyword(s):

Antidepressant Drug ◽

Beagle Dogs ◽

Long Term Effects ◽

Short Term ◽

Platelet Counts ◽

Toxicological Studies ◽

Induced Aggregation ◽

Internal Architecture

Previous short term toxicological studies of one to two weeks duration have demonstrated that MDL 19,660 (5-(4-chlorophenyl)-2,4-dihydro-2,4-dimethyl-3Hl, 2,4-triazole-3-thione), an antidepressant drug, causes a dose-related thrombocytopenia in dogs. Platelet counts started to decline after two days of dosing with 30 mg/kg/day and continued to decrease to their lowest levels by 5-7 days. The loss in platelets was primarily of the small discoid subpopulation. In vitro studies have also indicated that MDL 19,660: does not spontaneously aggregate canine platelets and has moderate antiaggregating properties by inhibiting ADP-induced aggregation. The objectives of the present investigation of MDL 19,660 were to evaluate ultrastructurally long term effects on platelet internal architecture and changes in subpopulations of platelets and megakaryocytes.Nine male and nine female beagle dogs were divided equally into three groups and were administered orally 0, 15, or 30 mg/kg/day of MDL 19,660 for three months. Compared to a control platelet range of 353,000- 452,000/μl, a doserelated thrombocytopenia reached a maximum severity of an average of 135,000/μl for the 15 mg/kg/day dogs after two weeks and 81,000/μl for the 30 mg/kg/day dogs after one week.

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Comparison of Auditory, Language, Memory, and Attention Abilities in Children With and Without Listening Difficulties

American Journal of Audiology ◽

10.1044/2020_aja-20-00018 ◽

2020 ◽

Vol 29 (4) ◽

pp. 710-727

Author(s):

Beula M. Magimairaj ◽

Naveen K. Nagaraj ◽

Alexander V. Sergeev ◽

Natalie J. Benafield

Keyword(s):

Auditory Processing ◽

Short Term Memory ◽

Group Differences ◽

Long Term Memory ◽

Short Term ◽

Significant Group ◽

Term Memory ◽

Memory And Attention ◽

Speed And Accuracy

Objectives School-age children with and without parent-reported listening difficulties (LiD) were compared on auditory processing, language, memory, and attention abilities. The objective was to extend what is known so far in the literature about children with LiD by using multiple measures and selective novel measures across the above areas. Design Twenty-six children who were reported by their parents as having LiD and 26 age-matched typically developing children completed clinical tests of auditory processing and multiple measures of language, attention, and memory. All children had normal-range pure-tone hearing thresholds bilaterally. Group differences were examined. Results In addition to significantly poorer speech-perception-in-noise scores, children with LiD had reduced speed and accuracy of word retrieval from long-term memory, poorer short-term memory, sentence recall, and inferencing ability. Statistically significant group differences were of moderate effect size; however, standard test scores of children with LiD were not clinically poor. No statistically significant group differences were observed in attention, working memory capacity, vocabulary, and nonverbal IQ. Conclusions Mild signal-to-noise ratio loss, as reflected by the group mean of children with LiD, supported the children's functional listening problems. In addition, children's relative weakness in select areas of language performance, short-term memory, and long-term memory lexical retrieval speed and accuracy added to previous research on evidence-based areas that need to be evaluated in children with LiD who almost always have heterogenous profiles. Importantly, the functional difficulties faced by children with LiD in relation to their test results indicated, to some extent, that commonly used assessments may not be adequately capturing the children's listening challenges. Supplemental Material https://doi.org/10.23641/asha.12808607

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