Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus
Food-associated calls are widespread among primates. Its main function is to attract conspecifics to food sources, and callers may benefit from an increase in their inclusive fitness and by diluting predation risks. Conversely, food calls may increase competition over resources. In cooperative br...
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Comunicação vocal Socialidade em primatas Comportamento alimentar Cuidado aloparental |
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Comunicação vocal Socialidade em primatas Comportamento alimentar Cuidado aloparental Silva, Débora Louise da Cruz Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus |
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Food-associated calls are widespread among primates. Its main function is to attract
conspecifics to food sources, and callers may benefit from an increase in their inclusive fitness
and by diluting predation risks. Conversely, food calls may increase competition over resources.
In cooperative breeders, these calls may indicate their high proactivity in sharing resources with
other group members, especially when infant care is necessary. In the absence of infants,
individuals possibly adopt compensatory strategies to offset infant care costs and increase
energy intake. We aimed at investigating Callithrix jacchus vocal behavior in feeding contexts,
jointly addressing their cooperative care and intragroup competition. Thus, we performed a
series of experiments in which marmosets would encounter food with diverse quantity and
quality, both in periods where infants were present and not. We evaluated the latency to call,
time feeding before calling, and the number of calls emitted before others’ arrival by the first
animal to find the food. Finally, we analyzed the effects of marmosets’ social status, presence
of infants, and different experimental conditions on these behavioral variables. We observed
greater participation of helpers in all sessions. In infants' presence, male helpers had a faster
vocal response, decreased food consumption, and an increased food call production. In the
absence of infants, however, opposite results were found, corroborating greater proactivity and
willingness to share when infant care is necessary. Regarding different experimental conditions,
female helpers showed an increase in their calling latency and food consumption for small
amounts of food, which may indicate a lower propensity to share limited resources. In contrast,
males exhibited a decrease in latency and food consumption only for high-quality resources.
Our results are consistent with Callithrix jacchus social dynamics and reinforce male helpers’
proactive prosociality and their crucial role in infant care, whereas subordinate females engage
in a more competitive and less cooperative behavioral profile. |
| author2 |
http://lattes.cnpq.br/7728353162533373 |
| author_facet |
http://lattes.cnpq.br/7728353162533373 Silva, Débora Louise da Cruz |
| format |
masterThesis |
| author |
Silva, Débora Louise da Cruz |
| author_sort |
Silva, Débora Louise da Cruz |
| title |
Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus |
| title_short |
Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus |
| title_full |
Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus |
| title_fullStr |
Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus |
| title_full_unstemmed |
Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus |
| title_sort |
should i call or should i hold? factors affecting food-associated calls in wild callithrix jacchus |
| publisher |
Universidade Federal do Rio Grande do Norte |
| publishDate |
2021 |
| url |
https://repositorio.ufrn.br/handle/123456789/33003 |
| work_keys_str_mv |
AT silvadeboralouisedacruz shouldicallorshouldiholdfactorsaffectingfoodassociatedcallsinwildcallithrixjacchus |
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1773962624430505984 |
| spelling |
ri-123456789-330032021-08-27T16:54:38Z Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus Silva, Débora Louise da Cruz http://lattes.cnpq.br/7728353162533373 Burkart, Judith Yamamoto, Maria Emilia Oliveira, Maria Adelia Borstelmann de Comunicação vocal Socialidade em primatas Comportamento alimentar Cuidado aloparental Food-associated calls are widespread among primates. Its main function is to attract conspecifics to food sources, and callers may benefit from an increase in their inclusive fitness and by diluting predation risks. Conversely, food calls may increase competition over resources. In cooperative breeders, these calls may indicate their high proactivity in sharing resources with other group members, especially when infant care is necessary. In the absence of infants, individuals possibly adopt compensatory strategies to offset infant care costs and increase energy intake. We aimed at investigating Callithrix jacchus vocal behavior in feeding contexts, jointly addressing their cooperative care and intragroup competition. Thus, we performed a series of experiments in which marmosets would encounter food with diverse quantity and quality, both in periods where infants were present and not. We evaluated the latency to call, time feeding before calling, and the number of calls emitted before others’ arrival by the first animal to find the food. Finally, we analyzed the effects of marmosets’ social status, presence of infants, and different experimental conditions on these behavioral variables. We observed greater participation of helpers in all sessions. In infants' presence, male helpers had a faster vocal response, decreased food consumption, and an increased food call production. In the absence of infants, however, opposite results were found, corroborating greater proactivity and willingness to share when infant care is necessary. Regarding different experimental conditions, female helpers showed an increase in their calling latency and food consumption for small amounts of food, which may indicate a lower propensity to share limited resources. In contrast, males exhibited a decrease in latency and food consumption only for high-quality resources. Our results are consistent with Callithrix jacchus social dynamics and reinforce male helpers’ proactive prosociality and their crucial role in infant care, whereas subordinate females engage in a more competitive and less cooperative behavioral profile. Vocalizações associadas a alimentos são de comum ocorrência em primatas, possuindo por principal função a atração de coespecíficos para fontes alimentares, que podem beneficiar os emissores através do aumento da aptidão inclusiva e diluição do risco de predação. Em contrapartida, eleva as chances de competição por recursos. Em primatas reprodutores cooperativos, essas vocalizações podem sinalizar uma maior proatividade para partilhar recursos quando há infantes no grupo. Já na ausência de infantes, os indivíduos podem adotar estratégias para compensar os custos associados ao cuidado à prole e aumentar o ganho energético. Dessa forma, nós avaliamos o comportamento vocal de Callithrix jacchus em contexto alimentar, sob a ótica do cuidado cooperativo e da competição intragrupo. Assim, realizamos uma série de experimentos onde os saguis encontravam alimentos variáveis em quantidade e qualidade, durante períodos com e sem infantes no grupo. Considerando o primeiro animal a descobrir o alimento, avaliamos a latência para vocalizar, o tempo de alimentação até emitir o primeiro chamado, e a taxa de emissão de chamados antes da chegada dos demais. Analisamos ainda os efeitos que o status social, a presença de infantes e as diferentes condições experimentais apresentaram nessas variáveis comportamentais. Em geral, observamos uma maior participação dos ajudantes em todos os experimentos. Os machos ajudantes, na presença de infantes, tiveram uma resposta vocal mais rápida, um menor tempo de ingestão e um aumento na produção de chamados alimentares. Na ausência de infantes, observamos o resultado inverso, evidenciando uma maior proatividade e motivação para partilhar quando o cuidado à prole é necessário. Quanto às diferentes condições experimentais, as fêmeas ajudantes mostraram um aumento na latência para vocalizar e um maior consumo para condições com pouco alimento, o que pode indicar uma menor propensão para partilhar recursos limitados. Enquanto machos exibiram menor latência e consumo apenas para alimentos de alta qualidade. Nossos resultados refletem a dinâmica social de grupos de Callithrix jacchus e corroboram uma maior prosocialidade proativa dos machos ajudantes e o papel crucial desses no cuidado dos infantes, e um perfil mais competitivo e menos cooperativo por parte das fêmeas subordinadas. 2021-08-04T15:35:02Z 2021-08-04T15:35:02Z 2021-06-21 masterThesis SILVA, Débora Louise da Cruz. Should I call or should I hold? Factors affecting food-associated calls in wild Callithrix jacchus. 2021. 90f. Dissertação (Mestrado em Psicobiologia) - Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, 2021. https://repositorio.ufrn.br/handle/123456789/33003 pt_BR Acesso Aberto application/pdf Universidade Federal do Rio Grande do Norte Brasil UFRN PROGRAMA DE PÓS-GRADUAÇÃO EM PSICOBIOLOGIA |