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  1. AU="González-Gómez, Julio César"
  2. AU="Eisinger, Felix"
  3. AU="van Arkel, Gijs H J"
  4. AU="Dukkipati, Haripriya"
  5. AU="Mansoor, Farheen"
  6. AU="Stanton, Clive"
  7. AU=Herholz K AU=Herholz K
  8. AU="Marichal, Axel"
  9. AU="Camon, Ana M"
  10. AU="Randall, Michael D"

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  1. Artikel ; Online: Measurement of voluntary bite forces in large carnivores using a semi-automated reward-driven system.

    van der Meijden, Arie / González-Gómez, Julio César / Pulido-Osorio, María D / Herrel, Anthony

    The Journal of experimental biology

    2023  Band 226, Heft 7

    Abstract: Bite force is a key performance trait of the feeding system, but maximal in vivo bite force has been measured in few large mammals. The alternative, modelling of bite force from anatomy, cannot be validated without in vivo measurements. To overcome ... ...

    Abstract Bite force is a key performance trait of the feeding system, but maximal in vivo bite force has been measured in few large mammals. The alternative, modelling of bite force from anatomy, cannot be validated without in vivo measurements. To overcome existing limitations of ethics, safety and animal well-being, we propose a semi-automated method to obtain voluntary maximum bite forces from large mammals using bite plates that automatically dispense a food reward if an incrementally increasing threshold force value is reached. We validated our method using two Malayan sun bears, two Andean spectacled bears and a lioness. We show that voluntary bite force measurement using positive reinforcement is a non-invasive and reliable method to record maximum voluntary bite force performance in large mammals. Our results further show that in vivo data are critical as modeling efforts from osteology have greatly underestimated bite forces in Andean spectacled bears.
    Mesh-Begriff(e) Animals ; Bite Force ; Ursidae ; Biomechanical Phenomena ; Food ; Reward
    Sprache Englisch
    Erscheinungsdatum 2023-04-04
    Erscheinungsland England
    Dokumenttyp 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.245255
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Jg. 1995 - 2021: Lesesall (2.OG)
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  2. Artikel: Pinching or stinging? Comparing prey capture among scorpions with contrasting morphologies.

    García, Luis Fernando / Valenzuela-Rojas, Juan Carlos / González-Gómez, Julio César / Lacava, Mariángeles / van der Meijden, Arie

    The journal of venomous animals and toxins including tropical diseases

    2022  Band 28, Seite(n) e20210037

    Abstract: Background: Scorpions can use their pincers and/or stingers to subdue and immobilize their prey. A scorpion can thus choose between strategies involving force or venom, or both, depending on what is required to subdue its prey. Scorpions vary greatly in ...

    Abstract Background: Scorpions can use their pincers and/or stingers to subdue and immobilize their prey. A scorpion can thus choose between strategies involving force or venom, or both, depending on what is required to subdue its prey. Scorpions vary greatly in the size and strength of their pincers, and in the efficacy of their venom. Whether this variability is driven by their defensive or prey incapacitation functionis unknown. In this study, we test if scorpion species with different pincer morphologies and venom efficacies use these weapons differently during prey subjugation. To that end, we observed
    Methods: The scorpion pinch force was measured, and behavioral experiments were performed with hard and soft prey (
    Results: We found that scorpions with large pincers such as
    Conclusions: Our results show that scorpionspecies with massive pincers and high pinch force as
    Sprache Englisch
    Erscheinungsdatum 2022-04-01
    Erscheinungsland Brazil
    Dokumenttyp Journal Article
    ZDB-ID 2031021-3
    ISSN 1678-9199
    ISSN 1678-9199
    DOI 10.1590/1678-9199-JVATITD-2021-0037
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Intersexual Differences in the Gene Expression of

    Ramírez, Diego Sierra / Alzate, Juan F / Simone, Yuri / van der Meijden, Arie / Guevara, Giovany / Franco Pérez, Lida Marcela / González-Gómez, Julio César / Prada Quiroga, Carlos F

    Toxins

    2023  Band 15, Heft 7

    Abstract: The wandering spider, ...

    Abstract The wandering spider,
    Mesh-Begriff(e) Animals ; Female ; Male ; Gene Expression Profiling ; Toxins, Biological ; Vertebrates ; Transcriptome ; Spiders/genetics ; Spiders/metabolism ; Venoms ; Spider Venoms/genetics ; Spider Venoms/toxicity ; Spider Venoms/metabolism
    Chemische Substanzen Toxins, Biological ; Venoms ; Spider Venoms
    Sprache Englisch
    Erscheinungsdatum 2023-06-30
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2518395-3
    ISSN 2072-6651 ; 2072-6651
    ISSN (online) 2072-6651
    ISSN 2072-6651
    DOI 10.3390/toxins15070429
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel: Comparison of biological activities of

    Solano-Godoy, Jennifer Alexandra / González-Gómez, Julio César / Torres-Bonilla, Kristian A / Floriano, Rafael Stuani / Miguel, Ananda T Santa Fé / Murillo-Arango, Walter

    The journal of venomous animals and toxins including tropical diseases

    2021  Band 27, Seite(n) e20210005

    Abstract: Background: In the present study, we have tested whether specimens of the medically relevant scorpion : Methods: Scorpions were collected in Tolima and Huila, Colombia. Chemical profiles of the crude venom were obtained from 80 scorpions for each ... ...

    Abstract Background: In the present study, we have tested whether specimens of the medically relevant scorpion
    Methods: Scorpions were collected in Tolima and Huila, Colombia. Chemical profiles of the crude venom were obtained from 80 scorpions for each region, using SDS-PAGE and RP-HPLC. Assays for phospholipase A
    Results: The electrophoretic profiles of venom from the two regions showed similar bands of 6-14 kDa, 36-45 kDa, 65 kDa and 97 kDa. However, bands between 36 kDa and 65 kDa were observed with more intensity in venoms from Tolima, and a 95 kDa band occurred only in venoms from Huila. The chromatographic profile of the venoms showed differences in the intensity of some peaks, which could be associated with changes in the abundance of some components between both populations. Phospholipase A
    Conclusion: Our results reveal some variation in the activity of the venom between both populations, which could be explained by the ecological adaptations like differences in feeding, altitude and/or diverse predator exposure. However more in-depth studies are necessary to determine the drivers behind the differences in venom composition and activities.
    Sprache Englisch
    Erscheinungsdatum 2021-12-06
    Erscheinungsland Brazil
    Dokumenttyp Journal Article
    ZDB-ID 2031021-3
    ISSN 1678-9199
    ISSN 1678-9199
    DOI 10.1590/1678-9199-JVATITD-2021-0005
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  5. Artikel: Bi-nasal sectors of ganglion cells complex and visual evoked potential amplitudes as biomarkers in pituitary macroadenoma management.

    Hernández-Echevarría, Odelaisys / Cuétara-Lugo, Elizabeth Bárbara / Pérez-Benítez, Mario Jesús / González-Gómez, Julio César / González-Diez, Héctor Raúl / Mendoza-Santiesteban, Carlos E

    Frontiers in integrative neuroscience

    2022  Band 16, Seite(n) 1034705

    Abstract: The study aimed to evaluate the retinal ganglion cell structure using optical coherence tomography and the visual pathway function employing visual evoked potentials in the diagnosis and monitoring of patients with pituitary macroadenoma. A descriptive, ... ...

    Abstract The study aimed to evaluate the retinal ganglion cell structure using optical coherence tomography and the visual pathway function employing visual evoked potentials in the diagnosis and monitoring of patients with pituitary macroadenoma. A descriptive, cross-sectional, and longitudinal study (3 and 12 months follow-up) was conducted on forty-two patients. Thirty-five age-matched healthy controls were used in the cross-sectional one. Full neuro-ophthalmological evaluation (structural and functional) was carried out including global and segmented retinal nerve fiber layer/ganglion cell complex analysis and amplitude and latency of P100 component in the electrophysiology. Statistical data analysis was conducted with R version 3.6.3 and Python version 3.8. Associations were evaluated using Spearman's correlations. Amplitude sensitivities were 0.999, and bi-nasal sectors of ganglion cell complex thickness specificities were 0.999. This structural parameter had the highest diagnostic value (area under curve = 0.923). Significant associations were found between bi-nasal sectors with amplitude at 12' (rho > 0.7,
    Sprache Englisch
    Erscheinungsdatum 2022-11-24
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2452962-X
    ISSN 1662-5145
    ISSN 1662-5145
    DOI 10.3389/fnint.2022.1034705
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel: Notes on the feeding habits of a wandering spider, Phoneutria boliviensis (Arachnida: Ctenidae)

    Valenzuela-Rojas, Juan Carlos / González-Gómez, Julio César / Guevara, Giovany / Franco, Lida Marcela / Reinoso-Flórez, Gladys / García, Luis Fernando

    Journal of arachnology. 2020 June 17, v. 48, no. 1

    2020  

    Abstract: Phoneutria Perty, 1833 is considered one of the most toxic spider genera in the world; however, the natural history and biology of these spiders is still largely unexplored. The objective of this study was to determine the natural diet of the medically ... ...

    Abstract Phoneutria Perty, 1833 is considered one of the most toxic spider genera in the world; however, the natural history and biology of these spiders is still largely unexplored. The objective of this study was to determine the natural diet of the medically important species Phoneutria boliviensis (F.O.P.-Cambridge, 1897) based on prey records from Colombia, and supplemented by published records found in electronic databases as well as photographic records from the internet. We found that P. boliviensis is an euryphagous predator with a broad diet made up predominantly of arthropods (orders Araneae, Blattodea, Coleoptera, Hymenoptera, Lepidoptera, Mantodea, Orthoptera, and Phasmatodea) and to a lesser extent of small vertebrates (Gekkonidae, Hylidae, and Sphaerodactylidae). These results support previous evidence suggesting that P. boliviensis is a generalist predator that includes both invertebrates and small vertebrates in its diet.
    Schlagwörter Blattodea ; Coleoptera ; Gekkonidae ; Hylidae ; Hymenoptera ; Internet ; Lepidoptera ; Mantodea ; Orthoptera ; Phasmida ; Phoneutria ; diet ; natural history ; spiders ; toxicity ; Colombia
    Sprache Englisch
    Erscheinungsverlauf 2020-0617
    Umfang p. 43-48.
    Erscheinungsort American Arachnological Society
    Dokumenttyp Artikel
    Anmerkung NAL-AP-2-clean
    ZDB-ID 2092946-8
    ISSN 1937-2396 ; 0161-8202
    ISSN (online) 1937-2396
    ISSN 0161-8202
    DOI 10.1636/0161-8202-48.1.43
    Datenquelle NAL Katalog (AGRICOLA)

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  7. Artikel: Deciphering the diet of a wandering spider (

    Sierra Ramírez, Diego / Guevara, Giovany / Franco Pérez, Lida Marcela / van der Meijden, Arie / González-Gómez, Julio César / Carlos Valenzuela-Rojas, Juan / Prada Quiroga, Carlos Fernando

    Ecology and evolution

    2021  Band 11, Heft 11, Seite(n) 5950–5965

    Abstract: Arachnids are the most abundant land predators. Despite the importance of their functional roles as predators and the necessity to understand their diet for conservation, the trophic ecology of many arachnid species has not been sufficiently studied. In ... ...

    Abstract Arachnids are the most abundant land predators. Despite the importance of their functional roles as predators and the necessity to understand their diet for conservation, the trophic ecology of many arachnid species has not been sufficiently studied. In the case of the wandering spider,
    Sprache Englisch
    Erscheinungsdatum 2021-03-06
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2635675-2
    ISSN 2045-7758
    ISSN 2045-7758
    DOI 10.1002/ece3.7320
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  8. Artikel ; Online: Prey and Venom Efficacy of Male and Female Wandering Spider,

    Valenzuela-Rojas, Juan Carlos / González-Gómez, Julio César / van der Meijden, Arie / Cortés, Juan Nicolás / Guevara, Giovany / Franco, Lida Marcela / Pekár, Stano / García, Luis Fernando

    Toxins

    2019  Band 11, Heft 11

    Abstract: Spiders rely on venom to catch prey and few species are even capable of capturing vertebrates. The majority of spiders are generalist predators, possessing complex venom, in which different toxins seem to target different types of prey. In this study, we ...

    Abstract Spiders rely on venom to catch prey and few species are even capable of capturing vertebrates. The majority of spiders are generalist predators, possessing complex venom, in which different toxins seem to target different types of prey. In this study, we focused on the trophic ecology and venom toxicity of
    Mesh-Begriff(e) Animals ; Central America ; Female ; Host-Parasite Interactions ; Male ; Predatory Behavior ; Spider Venoms/toxicity ; Spiders/parasitology ; Vertebrates/parasitology
    Chemische Substanzen Spider Venoms
    Sprache Englisch
    Erscheinungsdatum 2019-10-27
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2518395-3
    ISSN 2072-6651 ; 2072-6651
    ISSN (online) 2072-6651
    ISSN 2072-6651
    DOI 10.3390/toxins11110622
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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