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1. Dynamic modulation of reproductive strategies in a simultaneous hermaphrodite and preference for the male role

Author:
Lorenzi, Maria Cristina,   et al.   ; Santi, Massimiliano; Picchi, Laura;     Show all 3 Authors
Source:
Animal behaviour 2018 v.146 pp. 87-96
ISSN:
0003-3472
Subject:
Polychaeta; aggression; animal behavior; animals; egg production; eggs; females; hermaphroditism; males; mating behavior; mating competitiveness; population structure; progeny; reproductive traits; sex allocation; social environment; spermatozoa
Abstract:
... Reproductive traits are often tightly linked to variations in the social environment. In animals with separate sexes, producing male or female offspring results in different fitness gains depending on population structure. In simultaneous hermaphrodites, allocating a given proportion of resources to the two sexes results in fitness gains that depend on mating opportunities, and extremely plastic h ...
DOI:
10.1016/j.anbehav.2018.10.004

2. Appeasing their hosts: a novel strategy for parasite brood

Author:
Lorenzi, Maria Cristina,   et al.   ; Elia, Marta; Khalil, Alix; Bagnères, Anne-Geneviève;     Show all 4 Authors
Source:
Animal behaviour 2018 v.146 pp. 123-134
ISSN:
0003-3472
Subject:
Polistes atrimandibularis; aggression; alkenes; hosts; larvae; nestmate recognition; parasites; pupae; social wasps
Abstract:
... Brood and social parasites exploit the parental care of their host and often integrate into host colonies using different strategies at different moments during their life cycle. In social wasps, the obligate social parasite Polistes atrimandibularis, using chemical mimicry and chemical insignificance, avoids detection by its host, Polistes biglumis, which has an efficient nestmate recognition sys ...
DOI:
10.1016/j.anbehav.2018.10.011

3. Vibratory signals predict rank and offspring caste ratio in a social insect

Author:
Lorenzi, Maria Cristina,   et al.   ; Mignini, Michele;     Show all 2 Author
Source:
Behavioral ecology and sociobiology 2015 v.69 no.10 pp. 1739-1748
ISSN:
0340-5443
Subject:
Polistes; caste determination; larvae; larval development; parasites; population; progeny; reproductives; social insects; social structure
Abstract:
... In complex societies, communication signals function as fine tools for regulating social structure and coordinating activities, while enabling groups to adjust their strategies flexibly in response to ecological conditions. Social wasps of the genus Polistes perform vibratory movements, which are expressed by dominant individuals mainly during adult-larva feeding interactions. Recent investigation ...
DOI:
10.1007/s00265-015-1986-x

4. Multiple paternity and mate competition in non-selfing, monogamous, egg-trading hermaphrodites

Author:
Lorenzi, Maria Cristina,   et al.   ; Schleicherová, Dáša; Sella, Gabriella;     Show all 3 Authors
Source:
Acta ethologica 2014 v.17 no.3 pp. 173-179
ISSN:
0873-9749
Subject:
Polychaeta; animal behavior; animals; cocoons; egg masses; eggs; females; genetic markers; group size; males; mating competitiveness; monogamy; paternity; progeny; sex allocation; spermatozoa
Abstract:
... In animals in which the two sexes invest relatively similar amounts of resources in their young, the number of mates is expected to affect male and female reproductive success similarly and gender conflicts on the number of mates may not arise. Correspondingly, in non-selfing, simultaneous hermaphrodites with long-term monogamy, the two partners are expected to alternate repeatedly their sexual ro ...
DOI:
10.1007/s10211-013-0169-x

5. Population Diversity in Cuticular Hydrocarbons and mtDNA in a Mountain Social Wasp

Author:
Lorenzi, Maria Cristina,   et al.   ; Bonelli, Mariaelena; Christidès, Jean-Philippe; Dupont, Simon; Bagnères, Anne-Geneviève;     Show all 5 Authors
Source:
Journal of chemical ecology 2015 v.41 no.1 pp. 22-31
ISSN:
0098-0331
Subject:
Polistes; biochemical polymorphism; ecology; geographical variation; haplotypes; hydrocarbons; mitochondrial DNA; mountains; nestmate recognition; phylogeography; social insects; Alps region
Abstract:
... Nestmate recognition is a common phenomenon in social insects that typically is mediated by cuticular hydrocarbons. Geographical variation in cuticular hydrocarbons has been observed, although the pattern of variation is not consistent across species and is usually related to the biology and ecology of the different species. Polistes biglumis (Hymenoptera: Vespidae) is a social wasp that lives in ...
DOI:
10.1007/s10886-014-0531-0
PubMed:
25516225

6. Functional males in pair-mating outcrossing hermaphrodites

Author:
LORENZI, MARIA CRISTINA,   et al.   ; DI BONA, VALERIA; SELLA, GABRIELLA;     Show all 3 Authors
Source:
Biological journal of the Linnean Society 2010 v.100 no.2 pp. 451-456
ISSN:
0024-4066
Subject:
sex allocation
Abstract:
... In the mating system of simultaneously hermaphroditic animals, sexual allocation is predicted to vary as a function of the number of potential mates. According to the Hermaphrodite's Dilemma, sexual conflict over the preferred sexual role in hermaphroditic animals is resolved by reciprocity (i.e. by alternating sexual roles), accompanied by the animals' occasional cheating in the preferred role at ...
DOI:
10.1111/j.1095-8312.2010.01435.x

7. Cleptoparasites, social parasites and a common host: Chemical insignificance for visiting host nests, chemical mimicry for living in

Author:
Lorenzi, Maria Cristina,   et al.   ; Uboni, Alessia; Bagnères, Anne-Geneviève; Christidès, Jean-Philippe;     Show all 4 Authors
Source:
Journal of insect physiology 2012 v.58 no.9 pp. 1259-1264
ISSN:
0022-1910
Subject:
Mutillidae; Polistes atrimandibularis; alkanes; hosts; insect colonies; nestmate recognition; nests; parasitic wasps; social insects
Abstract:
... Social insect colonies contain attractive resources for many organisms. Cleptoparasites sneak into their nests and steal food resources. Social parasites sneak into their social organisations and exploit them for reproduction. Both cleptoparasites and social parasites overcome the ability of social insects to detect intruders, which is mainly based on chemoreception. Here we compared the chemical ...
DOI:
10.1016/j.jinsphys.2012.06.013
PubMed:
22759412

8. The chemical strategies used by Polistes nimphus social wasp usurpers (Hymenoptera Vespidae)

Author:
LORENZI, MARIA CRISTINA,   et al.   ; CALDI, MARCO; CERVO, RITA;     Show all 3 Authors
Source:
Biological journal of the Linnean Society 2007 v.91 no.3 pp. 505-512
ISSN:
0024-4066
Subject:
Polistes dominula; social parasitism
Abstract:
... Polistes foundresses can behave as facultative social parasites when, instead of founding their own nest, they usurp colonies of the same or a different species and temporary use the host workforce to raise their own brood. Conspecific usurpation appears to be common among Polistes wasps, but nothing is known about the mechanisms that these facultative social parasites use to have themselves accep ...
DOI:
10.1111/j.1095-8312.2007.00815.x

9. Increased sperm allocation delays body growth in a protandrous simultaneous hermaphrodite

Author:
Lorenzi, Maria Cristina,   et al.   ; Sella, Gabriella;     Show all 2 Author
Source:
Biological journal of the Linnean Society 2003 v.78 no.1 pp. 149-154
ISSN:
0024-4066
Subject:
Polychaeta; adolescents; eggs; environmental factors; males; protandry; sex allocation; spermatozoa
Abstract:
... Sex allocation theory for simultaneous hermaphrodites predicts that hermaphrodites have a fixed amount of reproductive resources to allocate to both sex functions and that they trade off their allocation to both sexes depending on environmental conditions. Ophryotrocha diadema is a simultaneous hermaphroditic polychaete worm which has a protandrous phase prior to the hermaphroditic phase. The abil ...
DOI:
10.1046/j.1095-8312.2003.00167.x