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Interpopulational variation in mating system and reproductive success of Manogea porracea (Araneae, Araneidae), a spider with amphisexual care

Grant number: 17/14196-5
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): March 01, 2018
Effective date (End): February 18, 2020
Field of knowledge:Biological Sciences - Zoology - Animal Behavior
Principal Investigator:João Vasconcellos Neto
Grantee:Rafael Rios Moura
Host Institution: Instituto de Biologia (IB). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil


The first case of extended male care in solitary spiders was described to the spider Manogea porracea at the Fazenda Nova Monte Carmelo, Estrela do Sul, MG. Males can remove humidity from egg sacs after raining, repair webs when they are damaged by wind, rain or other stochastic factors, avoiding egg sacs to fall on the ground and to be attacked by predators, and protect offspring against araneophagic spiders. This Neotropical spider species occurs from Panama to Brazil. Although there is little evidence of inter-population variation in parental behaviors of animals, it is possible that species with a wide range geographical distribution, like M. porracea, could be subject to different conditions affecting male care (e.g., predation risk and mate availability). Preliminary observations suggest that some important parental traits vary between the population of Estrela do Sul and another population, located in Reserva Natural Vale, Linhares, ES. In the population of Linhares, males were also observed caring for offspring. They apparently offer food to females and spiderlings, although these behaviors were not observed in the population of Estrela do Sul. Males may become more selective and stay for longer on the web of a single partner, due to these additional investments. Consequently, mating system must be more strongly monogamous, and males may have greater reproductive success compared to males of the population of Estrela do Sul. In this project, we will describe male care in the M. porracea population of Linhares and its effects on offspring survival. We will also draw microsatellite markers to this spider aiming to compare mating system and the paternity percentage of males caring for offspring in both populations. Therefore, we intend to describe the inter-population variation in the recently discovered paternal behaviors of M. porracea and to evaluate its implications to mating system and male reproductive success of both population. To do these measures, we will apply genetic analysis to field observations and experimentations. These works, therefore, bring important innovations to studies about sexual selection and parental care in spiders and to my training as ecologist.

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Scientific publications (15)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MOURA, RAFAEL R.; GONZAGA, MARCELO O.. Spatial variation in sex ratio and density explains subtle changes in the strength of size-assortative mating in Edessa contermina (Hemiptera: Pentatomidae). ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY, v. 95, p. 86-92, . (17/14196-5)
SEGOVIA, JULIO M. G.; MOURA, RAFAEL RIOS; WILLEMART, RODRIGO H.. Starvation decreases behavioral consistency in a Neotropical harvestman. ACTA ETHOLOGICA, v. 22, n. 3, p. 203-208, . (17/14196-5, 14/19191-3)
MOURA, RAFAEL RIOS; VASCONCELLOS-NETO, JOAO; GONZAGA, MARCELO OLIVEIRA. Female sexual maturity as a determining factor of size-assortative pairing in the protandrous spider Manogea porracea (Araneae, Araneidae). ZOOLOGISCHER ANZEIGER, v. 284, p. 1-6, . (17/14196-5)
XAVIER, GABRIEL MAXIMO; MOURA, RAFAEL RIOS; GONZAGA, MARCELO DE OLIVEIRA. Towards simplicity and accuracy: Assessing traditional and new estimators of orb-web capture thread length. Behavioural Processes, v. 173, . (17/14196-5)
ALVES DE DEUS, JEAN PABLO; ARAUJO, GUI; TUNES BUSCHINI, MARIA LUISA; MOURA, RAFAEL RIOS. Habitat types in the Atlantic Forest differently influence community structure and species interaction of cavity-nesting Hymenoptera and their natural enemies. JOURNAL OF INSECT CONSERVATION, v. 27, n. 1, p. 12-pg., . (17/14196-5)
MOURA, RAFAEL RIOS; OLIVEIRA, ISABELLA DIAS; VASCONCELLOS-NETO, JOAO; GONZAGA, MARCELO OLIVEIRA. "Where ignorance is bliss, 'tis folly to be wise": Indiscriminate male care in a neotropical spider. Ethology, v. 127, n. 3, p. 8-pg., . (17/14196-5)
SOBCZAK, JOBER FERNANDO; XAVIER, GABRIEL MAXIMO; GONZAGA, MARCELO OLIVEIRA; PENTEADO-DIAS, ANGELICA MARIA. Host size selection and progeny sex determination in Hymenoepimecis bicolor (Hymenoptera, Ichneumonidae, Pimplinae). Ethology, v. 129, n. 6, p. 8-pg., . (17/14196-5, 14/50940-2)
PITILIN, RENAN B.; MOURA, RAFAEL R.; GONZAGA, MARCELO O.. Population and individual trophic niche of two sympatric cobweb spiders, Nihonhimea tesselata and Tidarren haemorrhoidale (Araneae: Theridiidae). JOURNAL OF ARACHNOLOGY, v. 48, n. 1, p. 59-66, . (17/14196-5)
RIOS MOURA, RAFAEL; OLIVEIRA GONZAGA, MARCELO; SILVA PINTO, NELSON; VASCONCELLOS-NETO, JOAO; REQUENA, GUSTAVO S.. Assortative mating in space and time: patterns and biases. ECOLOGY LETTERS, v. 24, n. 5, . (17/14196-5)
XAVIER, GABRIEL MAXIMO; QUERO, ADILSON; MOURA, RAFAEL RIOS; VIEIRA, CAMILA; MEIRA, FELIPE ANDRE; GONZAGA, MARCELO OLIVEIRA. Influence of web traits, height, and daily periods of exposition on prey captured by orb-weaver spiders. Behavioural Processes, v. 193, . (17/14196-5)
MOURA, RAFAEL RIOS; OLIVEIRA, ISABELLA DIAS; VASCONCELLOS-NETO, JOAO; GONZAGA, MARCELO OLIVEIRA. ``Where ignorance is bliss, `tis folly to be wise{''}: Indiscriminate male care in a neotropical spider. Ethology, v. 127, n. 3, . (17/14196-5)
MOURA, RAFAEL R.; PITILIN, RENAN B.; BUSCHINI, MARIA L. T.. Specialisation in prey capture drives coexistence among sympatric spider-hunting wasps. ECOLOGICAL ENTOMOLOGY, v. 44, n. 5, p. 639-647, . (17/14196-5, 14/50940-2)
CHAVES GARCIA, FREDERICO ALEKHINE; MOURA, RAFAEL RIOS; OGAWA, CYNTHIA YURI; SGOBARO ZANETTE, LORENZO ROBERTO; FEITOSA SILVA, JOSE ROBERTO; REZENDE, CARLA FERREIRA. Never forget where you came from: Microhabitat of origin influences boldness and exploration in the hermit crab Clibanarius symmetricus (Diogenidae). Journal of Experimental Marine Biology and Ecology, v. 527, . (17/14196-5)
MEIRA, FELIPE ANDRE; MOURA, RAFAEL RIOS; GONZAGA, MARCELO OLIVEIRA. Araneophagy as an alternative foraging tactic to kleptoparasitism in two Argyrodinae (Araneae: Theridiidae) species. Behavioural Processes, v. 189, . (17/14196-5)

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