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Adult sex ratio and male body condition affect alternative reproductive tactics in a spider

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F22%3A00554988" target="_blank" >RIV/60077344:_____/22:00554988 - isvavai.cz</a>

  • Alternative codes found

    RIV/60076658:12310/22:43905641

  • Result on the web

    <a href="https://academic.oup.com/beheco/article-abstract/33/1/271/6448809?redirectedFrom=fulltext" target="_blank" >https://academic.oup.com/beheco/article-abstract/33/1/271/6448809?redirectedFrom=fulltext</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1093/beheco/arab138" target="_blank" >10.1093/beheco/arab138</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Adult sex ratio and male body condition affect alternative reproductive tactics in a spider

  • Original language description

    Biases in adult sex ratios can alter the intensity of sexual selection by enhancing competition for mates. Under intense competition males increase their investment in behaviors to outcompete rivals (e.g., fighting). Yet, given that in male-biased environments mating opportunities are rare males may alternatively reduce costly courtship and/or adopt alternative reproductive tactics (ARTs). Males of the spider Pisaura mirabilis adopt different mating tactics, offering females genuine nuptial gifts (prey), nutritionally worthless gifts (prey leftovers), or no gifts. To test whether behavioral shifts between gift tactics are triggered by changes in the competitive environment, we established replicate spider populations under natural conditions at varying adult sex ratios (male-biased, female-biased and equal) and sampled gift tactics repeatedly over time. We additionally explored how male individual traits, such as body size and condition, affect the expression of ARTs. In male-biased populations males produced more gifts but of low quality, suggesting competition to trigger increased mating effort to ensure mate acquisition and fertilizations, but through a worthless gift tactic. Production of gifts and of genuine gifts was favored by high body condition, pointing to energetic limitations as being central for male reproductive capacity. We hence highlight two co-existing mechanisms at play to explain ARTs in this system, the competitive social environment where expression of gift tactics is based on optimal-decision making to overcome competition, and a conditional strategy linked to the individual’s energetic state.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10604 - Reproductive biology (medical aspects to be 3)

Result continuities

  • Project

    <a href="/en/project/LTAB19026" target="_blank" >LTAB19026: Animal personalities as drivers for intra- and inter-species interactions in natural arthropod communities</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2022

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Behavioral Ecology

  • ISSN

    1045-2249

  • e-ISSN

    1465-7279

  • Volume of the periodical

    33

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    9

  • Pages from-to

    271-279

  • UT code for WoS article

    000757960400028

  • EID of the result in the Scopus database

    2-s2.0-85126315644