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  1. Article ; Online: Parasitism in viviparous vertebrates: an overview.

    Palacios-Marquez, Juan J / Guevara-Fiore, Palestina

    Parasitology research

    2023  Volume 123, Issue 1, Page(s) 53

    Abstract: The reproductive mode of viviparity has independently evolved in various animal taxa. It refers to the condition in which the embryos or young develop inside the female's body during gestation, providing advantages such as protection, nutrition, and ... ...

    Abstract The reproductive mode of viviparity has independently evolved in various animal taxa. It refers to the condition in which the embryos or young develop inside the female's body during gestation, providing advantages such as protection, nutrition, and improved survival chances. However, parasites and diseases can be an evolutionary force that limit the host's resources, leading to physiological, morphological, and behavioral changes that impose additional costs on both the pregnant female and her offspring. This review integrates the primary literature published between 1980 and 2021 on the parasitism of viviparous hosts. We describe aspects such as reproductive investment in females, offspring sex ratios, lactation investment in mammals, alterations in birth intervals, current reproductive investment, variations between environments, immune system activity in response to immunological challenges, and other factors that can influence the interaction between viviparous females and parasites. Maintaining pregnancy incurs costs in managing the mother's resources and regulating the immune system's responses to the offspring, while simultaneously maintaining an adequate defense against parasites and pathogens. Parasites can significantly influence this reproductive mode: parasitized females adjust their investment in survival and reproduction based on their life history, environmental factors, and the diversity of encountered parasites.
    MeSH term(s) Female ; Animals ; Pregnancy ; Vertebrates ; Biological Evolution ; Lactation ; Nutritional Status ; Reproduction ; Mammals
    Language English
    Publishing date 2023-12-15
    Publishing country Germany
    Document type Journal Article ; Review
    ZDB-ID 284966-5
    ISSN 1432-1955 ; 0932-0113 ; 0044-3255
    ISSN (online) 1432-1955
    ISSN 0932-0113 ; 0044-3255
    DOI 10.1007/s00436-023-08083-z
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  2. Article ; Online: Transmission dynamics of ectoparasitic gyrodactylids (Platyhelminthes, Monogenea): An integrative review.

    Tepox-Vivar, Natalia / Stephenson, Jessica F / Guevara-Fiore, Palestina

    Parasitology

    2022  , Page(s) 1–13

    Abstract: Parasite transmission is the ability of pathogens to move between hosts. As a key component of the interaction between hosts and parasites, it has crucial implications for the fitness of both. Here, we review the transmission dynamics of Gyrodactylus ... ...

    Abstract Parasite transmission is the ability of pathogens to move between hosts. As a key component of the interaction between hosts and parasites, it has crucial implications for the fitness of both. Here, we review the transmission dynamics of Gyrodactylus species, which are monogenean ectoparasites of teleost fishes and a prominent model for studies of parasite transmission. Particularly, we focus on the most studied host–parasite system within this genus: guppies, Poecilia reticulata, and G. turnbulli/G. bullatarudis. Through an integrative literature examination, we identify the main variables affecting Gyrodactylus spread between hosts, and the potential factors that enhance their transmission. Previous research indicates that Gyrodactylids spread when their current conditions are unsuitable. Transmission depends on abiotic factors like temperature, and biotic variables such as gyrodactylid biology, host heterogeneity, and their interaction. Variation in the degree of social contact between hosts and sexes might also result in distinct dynamics. Our review highlights a lack of mathematical models that could help predict the dynamics of gyrodactylids, and there is also a bias to study only a few species. Future research may usefully focus on how gyrodactylid reproductive traits and host heterogeneity promote transmission and should incorporate the feedbacks between host behaviour and parasite transmission.
    Language English
    Publishing date 2022-04-19
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 207627-5
    ISSN 1469-8161 ; 0031-1820
    ISSN (online) 1469-8161
    ISSN 0031-1820
    DOI 10.1017/S0031182022000361
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  3. Article ; Online: Male sexual behaviour and ethanol consumption from an evolutionary perspective: A comment on "Sexual Deprivation Increases Ethanol Intake in Drosophila".

    Guevara-Fiore, Palestina / Endler, John A

    Fly

    2015  Volume 8, Issue 4, Page(s) 234–236

    Abstract: Shohat-Ophir et al. (1) demonstrate a connection between sexual behaviour and ethanol consumption in male Drosophila flies, and how the neuropeptide F system regulates ethanol preference. Their results are rightly discussed only in a physiological ... ...

    Abstract Shohat-Ophir et al. (1) demonstrate a connection between sexual behaviour and ethanol consumption in male Drosophila flies, and how the neuropeptide F system regulates ethanol preference. Their results are rightly discussed only in a physiological context, but this has facilitated erroneous anthropomorphic interpretations by the media. Here we discuss the link between male sexual behaviour and ethanol consumption from an evolutionary perspective, providing a broader context to interpret their results.
    MeSH term(s) Animals ; Behavior, Animal ; Drosophila Proteins/metabolism ; Drosophila melanogaster/physiology ; Ethanol/administration & dosage ; Female ; Male ; Neuropeptides/metabolism ; Receptors, Neuropeptide/metabolism ; Sexual Behavior, Animal
    Chemical Substances Drosophila Proteins ; Neuropeptides ; Receptors, Neuropeptide ; Ethanol (3K9958V90M)
    Language English
    Publishing date 2015-05-13
    Publishing country United States
    Document type Journal Article ; Comment
    ISSN 1933-6942
    ISSN (online) 1933-6942
    DOI 10.1080/19336934.2015.1045694
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  4. Article ; Online: Elevation and blood traits in the mesquite lizard: Are patterns repeatable between mountains?

    González-Morales, Juan C / Fajardo, Víctor / de la Vega-Pérez, Anibal Helios Díaz / Barrios-Montiel, Rodrigo / Quintana, Eréndira / Moreno-Rueda, Gregorio / Rivera-Rea, Jimena / Guevara-Fiore, Palestina / Bastiaans, Elizabeth

    Comparative biochemistry and physiology. Part A, Molecular & integrative physiology

    2022  Volume 276, Page(s) 111338

    Abstract: Ecogeographical patterns describe predictable variation in phenotypic traits between ecological communities. For example, high-altitude animals are expected to show elevated hematological values as an adaptation to the lower oxygen pressure. Mountains ... ...

    Abstract Ecogeographical patterns describe predictable variation in phenotypic traits between ecological communities. For example, high-altitude animals are expected to show elevated hematological values as an adaptation to the lower oxygen pressure. Mountains act like ecological islands and therefore are considered natural laboratories. However, the majority of ecophysiological studies on blood traits lack replication that would allow us to infer if the pattern reported is a local event or whether it is a widespread pattern resulting from larger-scale ecological processes. In lizards, in fact, the increase of hematological values at high altitudes has received mixed support. Here, for the first time, we compare blood traits in lizards along elevational gradients with replication. We tested the repeatability of blood traits in mesquite lizards between different elevations in three different mountains from the Trans-Mexican Volcanic Belt. We measured hematocrit, hemoglobin concentration, mean corpuscular hemoglobin concentration, and erythrocyte size in blood samples of low, medium, and high-elevation lizards. We obtained similar elevational patterns between mountains, but the blood traits differed among mountains. Middle-altitude populations had greater oxygen-carrying capacity than lizards from low and high altitudes. The differences found between mountain systems could be the result of phenotypic plasticity or genetic differentiation as a consequence of abiotic factors not considered.
    MeSH term(s) Animals ; Prosopis ; Lizards/physiology ; Altitude ; Hematocrit ; Oxygen
    Chemical Substances Oxygen (S88TT14065)
    Language English
    Publishing date 2022-11-04
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 121246-1
    ISSN 1531-4332 ; 0300-9629 ; 1095-6433
    ISSN (online) 1531-4332
    ISSN 0300-9629 ; 1095-6433
    DOI 10.1016/j.cbpa.2022.111338
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  5. Article: Male sexual behaviour and ethanol consumption from an evolutionary perspective: A comment on “Sexual Deprivation Increases Ethanol Intake in Drosophila”

    Guevara-Fiore, Palestina / Endler, John A

    Fly. 2014 Oct. 2, v. 8, no. 4

    2014  

    Abstract: Shohat-Ophir et al.¹ demonstrate a connection between sexual behaviour and ethanol consumption in male Drosophila flies, and how the neuropeptide F system regulates ethanol preference. Their results are rightly discussed only in a physiological context, ... ...

    Abstract Shohat-Ophir et al.¹ demonstrate a connection between sexual behaviour and ethanol consumption in male Drosophila flies, and how the neuropeptide F system regulates ethanol preference. Their results are rightly discussed only in a physiological context, but this has facilitated erroneous anthropomorphic interpretations by the media. Here we discuss the link between male sexual behaviour and ethanol consumption from an evolutionary perspective, providing a broader context to interpret their results.
    Keywords Drosophila ; alcohol drinking ; ethanol ; males ; neuropeptides ; sexual behavior
    Language English
    Dates of publication 2014-1002
    Size p. 234-236.
    Publishing place Taylor & Francis
    Document type Article
    Note NAL-light
    ISSN 1933-6942
    DOI 10.1080/19336934.2015.1045694
    Database NAL-Catalogue (AGRICOLA)

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  6. Article ; Online: A Mountain or a Plateau? Hematological Traits Vary Nonlinearly with Altitude in a Highland Lizard.

    González-Morales, Juan Carlos / Beamonte-Barrientos, Rene / Bastiaans, Elizabeth / Guevara-Fiore, Palestina / Quintana, Erendira / Fajardo, Victor

    Physiological and biochemical zoology : PBZ

    2017  Volume 90, Issue 6, Page(s) 638–645

    Abstract: High-altitude organisms exhibit hematological adaptations to augment blood transport of oxygen. One common mechanism is through increased values of blood traits such as erythrocyte count, hematocrit, and hemoglobin concentration. However, a positive ... ...

    Abstract High-altitude organisms exhibit hematological adaptations to augment blood transport of oxygen. One common mechanism is through increased values of blood traits such as erythrocyte count, hematocrit, and hemoglobin concentration. However, a positive relationship between altitude and blood traits is not observed in all high-altitude systems. To understand how organisms adapt to high altitudes, it is important to document physiological patterns related to hypoxia gradients from a greater variety of species. Here, we present an extensive hematological description for three populations of Sceloporus grammicus living at 2,500, 3,400, and 4,300 m. We did not find a linear increase with altitude for any of the blood traits we measured. Instead, we found nonlinear relationships between altitude and the blood traits erythrocyte number, erythrocyte size, hematocrit, and hemoglobin concentration. Erythrocyte number and hematocrit leveled off as altitude increased, whereas hemoglobin concentration and erythrocyte size were highest at intermediate altitude. Additionally, lizards from our three study populations are similar in blood pH, serum electrolytes, glucose, and lactate. Given that the highest-altitude population did not show the highest levels of the variables we measured, we suggest these lizards may be using different adaptations to cope with hypoxia than lizards at low or intermediate altitudes. We discuss future directions that research could take to investigate such potential adaptations.
    MeSH term(s) Adaptation, Physiological ; Altitude ; Animals ; Cell Size ; Erythrocyte Count/veterinary ; Erythrocyte Indices ; Erythrocytes/cytology ; Hematocrit/veterinary ; Hemoglobins/physiology ; Lizards/blood ; Lizards/physiology ; Oxygen/blood
    Chemical Substances Hemoglobins ; Oxygen (S88TT14065)
    Language English
    Publishing date 2017-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1473845-4
    ISSN 1537-5293 ; 1522-2152
    ISSN (online) 1537-5293
    ISSN 1522-2152
    DOI 10.1086/694833
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  7. Article: Inbreeding level does not induce female discrimination between sibs and unrelated males in guppies

    Guevara-Fiore, Palestina / Rosenqvist, Gunilla / Watt, Penelope J

    Behavioral ecology and sociobiology. 2010 Oct., v. 64, no. 10

    2010  

    Abstract: Significant empirical evidence has demonstrated the importance of discriminative mate choice as a mechanism to avoid inbreeding. Incestuous mating can be avoided by recognition of kin. The guppy, Poecilia reticulata, is a livebearer with a polygamous ... ...

    Abstract Significant empirical evidence has demonstrated the importance of discriminative mate choice as a mechanism to avoid inbreeding. Incestuous mating can be avoided by recognition of kin. The guppy, Poecilia reticulata, is a livebearer with a polygamous mating system and active female choice. Despite potential inbreeding costs in the guppy, Viken et al. (Ethology 112:716-723, 2006) and Pitcher et al. (Genetica 134:137-146, 2008) have found that females do not discriminate between sibs and unrelated males. However, populations experiencing different inbreeding histories can have different levels of inbreeding avoidance, and it is possible that the lack of inbreeding avoidance observed in guppies is a consequence of using outbred fish only. Here we tested the preference of female guppies with different inbreeding coefficients, for olfactory cues of males that were either unrelated but had the same inbreeding coefficient, or were related (i.e. brother) with the same inbreeding coefficient. We found no evidence that female guppies preferred unrelated males with the same inbreeding coefficient. Moreover, inbreeding level did not influence female preference for unrelated males, suggesting that inbreeding history in a population has no influence on female discrimination of unrelated males in guppies.
    Keywords sexual selection ; odors
    Language English
    Dates of publication 2010-10
    Size p. 1601-1607.
    Publisher Springer-Verlag
    Publishing place Berlin/Heidelberg
    Document type Article
    ZDB-ID 194510-5
    ISSN 1432-0762 ; 0340-5443
    ISSN (online) 1432-0762
    ISSN 0340-5443
    DOI 10.1007/s00265-010-0973-5
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    Z 78/731: Show issues

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  8. Article: Mating effort and female receptivity: how do male guppies decide when to invest in sex

    Guevara-Fiore, Palestina / Stapley, Jessica / Watt, Penelope J

    Behavioral ecology and sociobiology. 2010 Oct., v. 64, no. 10

    2010  

    Abstract: Males vary in the degree to which they invest in mating. Several factors can explain this variation, including differences in males' individual condition and the fact that males allocate their energy depending on the context they face in each mating ... ...

    Abstract Males vary in the degree to which they invest in mating. Several factors can explain this variation, including differences in males' individual condition and the fact that males allocate their energy depending on the context they face in each mating attempt. Particularly, female quality affects male reproductive success. Here, we studied whether male guppies (Poecilia reticulata) strategically allocated more mating effort, in terms of mating behaviour and male-male competition, when they were matched with a receptive (R) female than a non-receptive one. In accordance with our prediction, we found that males increased their mating behaviour when they were with a receptive female. Even though male guppies can inseminate non-receptive females, we only found high levels of courtship between males that were with a receptive female rather than a non-receptive one. Although there was little affect of female receptivity on male-male competition, we found that males chased and interrupted courtships more with receptive females than with non-receptive females regardless of odour. Finally, we also studied whether the sexual pheromone produced by receptive female guppies is a cue that males use in order to increase their mating effort. We found that males were more attracted to a female when they perceived the sexual pheromone, but only increased their mating and aggressive behaviours when females showed receptive behaviour. This strategic increase in mating effort could result in higher male reproductive success because mating attempts towards receptive females are likely to be less costly and males could have a greater probability of fertilisation.
    Keywords sexual selection ; Poeciliidae
    Language English
    Dates of publication 2010-10
    Size p. 1665-1672.
    Publisher Springer-Verlag
    Publishing place Berlin/Heidelberg
    Document type Article
    ZDB-ID 194510-5
    ISSN 1432-0762 ; 0340-5443
    ISSN (online) 1432-0762
    ISSN 0340-5443
    DOI 10.1007/s00265-010-0980-6
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