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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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