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  1. Article: Beyond the prey: male spiders highly invest in silk when producing worthless gifts.

    Pavón-Peláez, Camila / Franco-Trecu, Valentina / Pandulli-Alonso, Irene / Jones, Therésa M / Albo, Maria J

    PeerJ

    2022  Volume 10, Page(s) e12757

    Abstract: ... In the ... ...

    Abstract In the spider
    Language English
    Publishing date 2022-01-05
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2703241-3
    ISSN 2167-8359
    ISSN 2167-8359
    DOI 10.7717/peerj.12757
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: The handsome liar: Male spiders offering worthless gifts can benefit increasing mating duration

    Pandulli‐Alonso, Irene / Tomasco, Ivanna H. / Albo, Maria J.

    Ethology. 2022 Mar., v. 128, no. 3

    2022  

    Abstract: Females of nuptial gift‐giving species are known to mate with several males, so that they secure multiple ejaculates and food via nuptial gifts. However, gifts may decrease females’ reproductive success, for instance, if they received non‐nutritive gifts ...

    Abstract Females of nuptial gift‐giving species are known to mate with several males, so that they secure multiple ejaculates and food via nuptial gifts. However, gifts may decrease females’ reproductive success, for instance, if they received non‐nutritive gifts (worthless). The gift‐giving mating system of the spider Paratrechalea ornata creates a scenario in which females may receive either a nutritive prey or a worthless inedible item wrapped in silk. The worthless gift tactic is expected to be less successful as females should prefer to mate and to mate for longer with males offering nutritive gifts. However, at the moment, the scarce information suggests that both mating tactics may have similar reproductive success. By exposing females to a double mating experimental design, we examined whether mating access and duration correlate with the gift type (nutritive‐worthless), mating order (first‐second), and male size, and additionally explored possible effects on female fitness (e.g., fecundity). We found that the females accepted to mate with courting males independently of gift type, mating order, or size. But, mating duration was positively correlated with male size, and longer when males offered worthless gifts. Furthermore, females’ fecundity increased with mating duration and female size. This demonstrated that males offering worthless gifts might enhance their reproductive success by transferring more sperm than those offering nutritive gifts. Thus, either due to female choice or male effort, male size might be a more relevant feature for reproductive success than gift type, which can explain the high frequencies of worthless gifts in the field.
    Keywords Paratrechalea ornata ; animal behavior ; experimental design ; fecundity ; females ; males ; reproductive success ; silk ; spermatozoa ; spiders
    Language English
    Dates of publication 2022-03
    Size p. 215-222.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note JOURNAL ARTICLE
    ZDB-ID 633469-6
    ISSN 0179-1613
    ISSN 0179-1613
    DOI 10.1111/eth.13258
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Characterization of four hypervariable microsatellite loci in a nuptial gift-giving spider and its prospect for paternity analyses

    Pandulli-Alonso, Irene / Germil, Mariana / Albo, María J / Tomasco, Ivanna H

    Arachnology. 2020 July 20, v. 18, no. 5

    2020  

    Abstract: In the gift-giving spider Paratrechalea ornata, females mate multiple times and apparently may bias the paternity according to the nuptial gift content (nutritive or worthless). Paternity studies using microsatellite markers would, therefore, be ideal ... ...

    Abstract In the gift-giving spider Paratrechalea ornata, females mate multiple times and apparently may bias the paternity according to the nuptial gift content (nutritive or worthless). Paternity studies using microsatellite markers would, therefore, be ideal for studying male fertilization success for female offspring. We genotyped four microsatellites previously reported in one species of the genus using 43 individuals from four different localities in Uruguay. We describe the allelic and genotypic variation in all loci, and compare the findings to the reported variation for the genus. Except for one locus, all loci showed significant departure from the Hardy-Weinberg equilibrium due to heterozygote deficit. This could possibly be explained by the mixed nature of the sample and the effect of the population structure. These loci, and especially those that are highly hypervariable, are an important tool for paternity assessment and would allow a better understanding of the role of post-copulatory processes in P. ornata.
    Keywords Paratrechalea ornata ; bias ; females ; genetic markers ; genetic variation ; genotyping ; heterozygosity ; loci ; males ; microsatellite repeats ; paternity ; population structure ; progeny ; Uruguay
    Language English
    Dates of publication 2020-0720
    Size p. 477-481.
    Publishing place British Arachnological Society
    Document type Article
    Note NAL-light
    ZDB-ID 2749540-1
    ISSN 2050-9936 ; 2050-9928
    ISSN (online) 2050-9936
    ISSN 2050-9928
    DOI 10.13156/arac.2020.18.5.477
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: Females of a gift-giving spider do not trade sex for food gifts: a consequence of male deception?

    Pandulli-Alonso, Irene / Quaglia, Agustín / Albo, Maria J

    BMC evolutionary biology

    2017  Volume 17, Issue 1, Page(s) 112

    Abstract: Background: Polyandry is commonly maintained by direct benefits in gift-giving species, so females may remate as an adaptive foraging strategy. However, the assumption of a direct benefit fades in mating systems where male gift-giving behaviour has ... ...

    Abstract Background: Polyandry is commonly maintained by direct benefits in gift-giving species, so females may remate as an adaptive foraging strategy. However, the assumption of a direct benefit fades in mating systems where male gift-giving behaviour has evolved from offering nutritive to worthless (non-nutritive) items. In the spider Paratrechalea ornata, 70% of gifts in nature are worthless. We therefore predicted female receptivity to be independent of hunger in this species. We exposed poorly-fed and well-fed females to multiple males offering nutritive gifts and well-fed females to males offering worthless gifts.
    Results: Though the treatments strongly affected fecundity, females of all groups had similar number of matings. This confirms that female receptivity is independent of their nutritional state, i.e. polyandry does not prevail as a foraging strategy.
    Conclusions: In the spider Pisaura mirabilis, in which the majority (62%) of gifts in nature are nutritive, female receptivity depends on hunger. We therefore propose that the dependence of female receptivity on hunger state may have evolved in species with predominantly nutritive gifts but is absent in species with predominantly worthless gifts.
    MeSH term(s) Animals ; Cannibalism ; Female ; Fertility ; Food ; Hunger ; Male ; Sexual Behavior, Animal ; Spiders/classification ; Spiders/physiology
    Language English
    Publishing date 2017-05-15
    Publishing country England
    Document type Journal Article
    ISSN 1471-2148
    ISSN (online) 1471-2148
    DOI 10.1186/s12862-017-0953-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Beyond the prey

    Camila Pavón-Peláez / Valentina Franco-Trecu / Irene Pandulli-Alonso / Therésa M. Jones / Maria J. Albo

    PeerJ, Vol 10, p e

    male spiders highly invest in silk when producing worthless gifts

    2022  Volume 12757

    Abstract: In the spider Paratrechalea ornata, males have two gift-giving mating tactics, offering either a nutritive (prey) or a worthless (prey leftovers) silk wrapped gift to females. Both gift types confer similar mating success and duration and afford males a ... ...

    Abstract In the spider Paratrechalea ornata, males have two gift-giving mating tactics, offering either a nutritive (prey) or a worthless (prey leftovers) silk wrapped gift to females. Both gift types confer similar mating success and duration and afford males a higher success rate than when they offer no gift. If this lack of difference in the reproductive benefits is true, we would expect all males to offer a gift but some males to offer a worthless gift even if prey are available. To test this, we allowed 18 males to court multiple females over five consecutive trials. In each trial, a male was able to produce a nutritive gift (a live housefly) or a worthless gift (mealworm exuviae). We found that, in line with our predictions, 20% of the males produced worthless gifts even when they had the opportunity to produce a nutritive one. However, rather than worthless gifts being a cheap tactic, they were related to a higher investment in silk wrapping. This latter result was replicated for worthless gifts produced in both the presence and absence of a live prey item. We propose that variation in gift-giving tactics likely evolved initially as a conditional strategy related to prey availability and male condition in P. ornata. Selection may then have favoured silk wrapping as a trait involved in female attraction, leading worthless gift-giving to invade.
    Keywords Deceptive tactics ; Gift-giving behaviour ; Male choice ; Silk wrapping investment ; Medicine ; R ; Biology (General) ; QH301-705.5
    Subject code 590
    Language English
    Publishing date 2022-01-01T00:00:00Z
    Publisher PeerJ Inc.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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