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  1. Article ; Online: Penguin-mounted video camera provides new insights into predator-prey interactions with prey fish.

    Tokunaga, Soma / Kawabata, Yuuki / Takahashi, Akinori

    Ecology

    2023  Volume 104, Issue 4, Page(s) e3992

    MeSH term(s) Animals ; Spheniscidae ; Fishes ; Ecosystem ; Predatory Behavior
    Language English
    Publishing date 2023-02-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2010140-5
    ISSN 1939-9170 ; 0012-9658
    ISSN (online) 1939-9170
    ISSN 0012-9658
    DOI 10.1002/ecy.3992
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Escaping via the predator's gill: A defensive tactic of juvenile eels after capture by predatory fish.

    Hasegawa, Yuha / Yokouchi, Kazuki / Kawabata, Yuuki

    Ecology

    2022  Volume 103, Issue 3, Page(s) e3612

    MeSH term(s) Animals ; Eels ; Fishes ; Gills ; Predatory Behavior
    Language English
    Publishing date 2022-01-30
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2010140-5
    ISSN 1939-9170 ; 0012-9658
    ISSN (online) 1939-9170
    ISSN 0012-9658
    DOI 10.1002/ecy.3612
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Correction: Effect of initial body orientation on escape probability of prey fish escaping from predators (doi:10.1242/bio.023812).

    Kimura, Hibiki / Kawabata, Yuuki

    Biology open

    2019  Volume 8, Issue 7

    Language English
    Publishing date 2019-07-29
    Publishing country England
    Document type Journal Article ; Published Erratum
    ZDB-ID 2632264-X
    ISSN 2046-6390
    ISSN 2046-6390
    DOI 10.1242/bio.045997
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Factors affecting gestation periods in elasmobranch fishes.

    Tokunaga, Soma / Watanabe, Yuuki Y / Kawano, Mai / Kawabata, Yuuki

    Biology open

    2022  Volume 11, Issue 6

    Abstract: Gestation periods vary greatly across elasmobranch species. Differences in body size and body temperature (i.e. major determinants of metabolic rates) might explain such variation. Although temperature effects have been demonstrated for captive animals, ... ...

    Abstract Gestation periods vary greatly across elasmobranch species. Differences in body size and body temperature (i.e. major determinants of metabolic rates) might explain such variation. Although temperature effects have been demonstrated for captive animals, body size effects remain undocumented. Moreover, whether metabolic rates of mothers or those of embryos affect gestation periods remains unclear. Because biological times generally scale with mass1-β, where β is metabolic scaling exponent (0.8-0.9 in fishes), we hypothesized that elasmobranch gestation periods would scale with mass0.1-0.2. We also hypothesized that regionally endothermic species with elevated metabolic rates should have shorter gestation periods than similar-sized ectothermic species if the metabolic rates of mothers are responsible. We compiled data on gestation periods for 36 elasmobranch species to show that gestation periods scale with M0.11 and m0.17, where M and m are adult female mass and birth mass, respectively. Litter size and body temperature also affected gestation periods. Our findings suggest that the body-mass dependence of metabolic rate explains some variations in elasmobranch gestation periods. Unexpectedly, regionally endothermic sharks did not have shorter gestation periods than their ectothermic counterparts, suggesting that the metabolic rates of embryos, which are likely ectothermic in all elasmobranch species, may be responsible. This article has an associated First Person interview with the first author of the paper.
    MeSH term(s) Animals ; Body Weight ; Female ; Fishes ; Humans ; Pregnancy ; Sharks/metabolism
    Language English
    Publishing date 2022-06-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 2632264-X
    ISSN 2046-6390 ; 2046-6390
    ISSN (online) 2046-6390
    ISSN 2046-6390
    DOI 10.1242/bio.059270
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Automated escape system: identifying prey's kinematic and behavioral features critical for predator evasion.

    Sunami, Nozomi / Kimura, Hibiki / Ito, Hidechika / Hashimoto, Koichi / Sato, Yuta / Tachibana, Soki / Hidaka, Mikiya / Miyama, Kouki / Watanabe, Hirofumi / Kawabata, Yuuki

    The Journal of experimental biology

    2024  

    Abstract: Identifying the kinematic and behavioral variables of prey that influence the evasion from predator attacks remains challenging. To address this challenge, we have developed an automated escape system that responds quickly to an approaching predator and ... ...

    Abstract Identifying the kinematic and behavioral variables of prey that influence the evasion from predator attacks remains challenging. To address this challenge, we have developed an automated escape system that responds quickly to an approaching predator and pulls the prey away from the predator rapidly, as real prey. Reaction distance, response latency, escape speed, and other variables can be adjusted in the system. By repeatedly measuring the response latency and escape speed of the system, we demonstrated the system's ability to exhibit fast and rapid responses while maintaining consistency across successive trials. Using the live predatory fish species, Coreoperca kawamebari, we show that escape speed and reaction distance significantly affect the outcome of predator-prey interactions. These findings indicate that the developed escape system is useful for identifying kinematic and behavioral features of prey that are critical for predator evasion, as well as for measuring the performance of predators.
    Language English
    Publishing date 2024-05-01
    Publishing country England
    Document type Journal Article
    ZDB-ID 218085-6
    ISSN 1477-9145 ; 0022-0949
    ISSN (online) 1477-9145
    ISSN 0022-0949
    DOI 10.1242/jeb.246772
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2629: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Effect of initial body orientation on escape probability of prey fish escaping from predators.

    Kimura, Hibiki / Kawabata, Yuuki

    Biology open

    2018  Volume 7, Issue 7

    Abstract: The kinematic and behavioral components of the escape response can affect the outcomes of predator-prey interactions. For example, because sensory perception range can have spatial bias, and because turn duration before the initiation of escape ... ...

    Abstract The kinematic and behavioral components of the escape response can affect the outcomes of predator-prey interactions. For example, because sensory perception range can have spatial bias, and because turn duration before the initiation of escape locomotion can be smaller when prey is oriented away from predators, the prey's body orientation relative to a predator at the onset of the escape response (initial orientation) could affect whether prey successfully evade predators. We tested this hypothesis by recording the escape responses of juvenile red sea bream (
    Language English
    Publishing date 2018-07-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2632264-X
    ISSN 2046-6390
    ISSN 2046-6390
    DOI 10.1242/bio.023812
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Idea paper: Effects of gonad type and body mass on the time required for sex change in fishes

    Tokunaga, Soma / Kadota, Tatsuru / Watanabe, Yuuki Y. / Kuwamura, Tetsuo / Kawabata, Yuuki

    Ecological research. 2022 July, v. 37, no. 4

    2022  

    Abstract: Sex change is a well‐known phenomenon in teleost fishes, and it takes several days to a few months depending on the species and direction of sex change. However, the underlying factors influencing the time required for sex change (TS) remain unclear. ... ...

    Abstract Sex change is a well‐known phenomenon in teleost fishes, and it takes several days to a few months depending on the species and direction of sex change. However, the underlying factors influencing the time required for sex change (TS) remain unclear. Given that the time for producing a new gonad largely determines TS, the gonad type (i.e., whether fish retain the gonad of opposite sex or not [delimited or non‐delimited]) and metabolic rate may affect TS. This study sought to test two hypotheses: (1) the delimited gonad shortens TS and (2) TS scales with mass⁰.¹⁻⁰.², because the metabolic scaling exponent (β) in fishes is 0.8–0.9 and biological times scale with mass¹⁻ᵝ in general. We compiled data on TS for 12 female‐to‐male and 14 male‐to‐female sex‐changing species from the literature. Results of individual examinations of the effects of gonad type and mass were consistent with our hypotheses. However, upon simultaneous examination of the effects of gonad type and mass, these effects became unclear because of their strong multicollinearity. The compiled data for delimited and non‐delimited gonads were biased toward the smaller and larger species, respectively, precluding us from being able to statistically distinguish between these effects. Small species with non‐delimited gonads and large species with delimited gonads exist; however, their TS has not been measured with high temporal resolution thus far. Therefore, additional experiments on these species are required to statistically distinguish between, as well as to better understand, the effects of gonad type and mass on TS.
    Keywords body weight ; fish ; metabolism ; paper ; research ; sex reversal
    Language English
    Dates of publication 2022-07
    Size p. 490-494.
    Publishing place John Wiley & Sons, Inc.
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 233459-8
    ISSN 1440-1703 ; 0912-3814
    ISSN (online) 1440-1703
    ISSN 0912-3814
    DOI 10.1111/1440-1703.12305
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 5374: Show issues

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  8. Article ; Online: Multiple preferred escape trajectories are explained by a geometric model incorporating prey's turn and predator attack endpoint.

    Kawabata, Yuuki / Akada, Hideyuki / Shimatani, Ken-Ichiro / Nishihara, Gregory Naoki / Kimura, Hibiki / Nishiumi, Nozomi / Domenici, Paolo

    eLife

    2023  Volume 12

    Abstract: The escape trajectory (ET) of prey - measured as the angle relative to the predator's approach path - plays a major role in avoiding predation. Previous geometric models predict a single ET; however, many species show highly variable ETs with multiple ... ...

    Abstract The escape trajectory (ET) of prey - measured as the angle relative to the predator's approach path - plays a major role in avoiding predation. Previous geometric models predict a single ET; however, many species show highly variable ETs with multiple preferred directions. Although such a high ET variability may confer unpredictability to avoid predation, the reasons why animals prefer specific multiple ETs remain unclear. Here, we constructed a novel geometric model that incorporates the time required for prey to turn and the predator's position at the end of its attack. The optimal ET was determined by maximizing the time difference of arrival at the edge of the safety zone between the prey and predator. By fitting the model to the experimental data of fish
    MeSH term(s) Animals ; Escape Reaction ; Predatory Behavior ; Anura
    Language English
    Publishing date 2023-02-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2687154-3
    ISSN 2050-084X ; 2050-084X
    ISSN (online) 2050-084X
    ISSN 2050-084X
    DOI 10.7554/eLife.77699
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Effect of Continuous Compression Stimulation on Pressure-Pain Threshold and Muscle Spasms in Older Adults With Knee Osteoarthritis: A Randomized Trial.

    Tanaka, Ryo / Umehara, Takuya / Kawabata, Yuuki / Sakuda, Tomohiko

    Journal of manipulative and physiological therapeutics

    2018  Volume 41, Issue 4, Page(s) 315–322

    Abstract: Objective: The purpose of this study was to assess the effect of continuous compression stimulation on pressure-pain threshold and muscle spasms in older adults with knee osteoarthritis.: Methods: Thirty-two older adults with knee osteoarthritis on ... ...

    Abstract Objective: The purpose of this study was to assess the effect of continuous compression stimulation on pressure-pain threshold and muscle spasms in older adults with knee osteoarthritis.
    Methods: Thirty-two older adults with knee osteoarthritis on outpatient visits were randomly divided into 2 groups. Those in the treatment group (n = 16) received 5-minute massage therapy (continuous compression stimulation), and those in the control group (n = 16) received sham massage therapy (touch without compression). Immediately before and after single-intervention sessions, the pressure-pain threshold, muscle spasm, and pain were quantified.
    Results: The change in pain on walking in the treatment group exceeded 1.9 cm, corresponding to the minimum clinically important difference. In the treatment group, the pressure-pain threshold improved significantly for pain both at rest and while walking, but the improvement in muscle spasm was not significant.
    Conclusions: Massage therapy resulted in minimal clinically important changes for pain relief. There was an increase in the pressure-pain threshold in the older adults with knee osteoarthritis. We propose that the improvements in pain may be related to the medial thigh muscle rather than knee osteoarthritis.
    MeSH term(s) Aged ; Arthralgia/etiology ; Arthralgia/therapy ; Female ; Humans ; Male ; Massage/methods ; Muscle Strength/physiology ; Osteoarthritis, Knee/complications ; Osteoarthritis, Knee/therapy ; Pain Management/methods ; Pain Measurement ; Pain Threshold ; Treatment Outcome ; Walking
    Language English
    Publishing date 2018-05-30
    Publishing country United States
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 761054-3
    ISSN 1532-6586 ; 0161-4754
    ISSN (online) 1532-6586
    ISSN 0161-4754
    DOI 10.1016/j.jmpt.2017.09.011
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1859: Show issues Location:
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  10. Article ; Online: Escaping from multiple visual threats: modulation of escape responses in Pacific staghorn sculpin (Leptocottus armatus).

    Kimura, Hibiki / Pfalzgraff, Tilo / Levet, Marie / Kawabata, Yuuki / Steffensen, John F / Johansen, Jacob L / Domenici, Paolo

    The Journal of experimental biology

    2022  Volume 225, Issue 9

    Abstract: Fish perform rapid escape responses to avoid sudden predatory attacks. During escape responses, fish bend their bodies into a C-shape and quickly turn away from the predator and accelerate. The escape trajectory is determined by the initial turn (stage 1) ...

    Abstract Fish perform rapid escape responses to avoid sudden predatory attacks. During escape responses, fish bend their bodies into a C-shape and quickly turn away from the predator and accelerate. The escape trajectory is determined by the initial turn (stage 1) and a contralateral bend (stage 2). Previous studies have used a single threat or model predator as a stimulus. In nature, however, multiple predators may attack from different directions simultaneously or in close succession. It is unknown whether fish are able to change the course of their escape response when startled by multiple stimuli at various time intervals. Pacific staghorn sculpin (Leptocottus armatus) were startled with a left and right visual stimulus in close succession. By varying the timing of the second stimulus, we were able to determine when and how a second stimulus could affect the escape response direction. Four treatments were used: a single visual stimulus (control); or two stimuli coming from opposite sides separated by a 0 ms (simultaneous treatment), 33 ms or 83 ms time interval. The 33 ms and 83 ms time intervals were chosen to occur either side of a predicted 60 ms visual escape latency (i.e. during stage 1). The 0 ms and 33 ms treatments influenced both the escape trajectory and the stage 1 turning angle, compared with a single stimulation, whereas the 83 ms treatment had no effect on the escape trajectory. We conclude that Pacific staghorn sculpin can modulate their escape trajectory only between stimulation and the onset of the response, but the escape trajectory cannot be modulated after the body motion has started.
    MeSH term(s) Animals ; Escape Reaction/physiology ; Fishes ; Perciformes/physiology ; Predatory Behavior
    Language English
    Publishing date 2022-05-09
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 218085-6
    ISSN 1477-9145 ; 0022-0949
    ISSN (online) 1477-9145
    ISSN 0022-0949
    DOI 10.1242/jeb.243328
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2629: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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