Dissertações em Zoologia (Mestrado) - PPGZOOL/ICB

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/2344

O Mestrado Acadêmico foi criado em 1985 e pertence ao Programa de Pós-Graduação em Zoologia (PPGZOOL) do Instituto de Ciências Biológicas (ICB) foi consolidado como um convênio entre Universidade Federal do Pará (UFPA) e Museu Paraense Emílio Goeldi (MPEG).

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Acesso aberto (Open Access)
Aprendizado espaço-tempo no forrageamento de abelhas sem ferrão amazônicas (Apidae, Meliponini)
(Universidade Federal do Pará, 2012) JESUS, Thiago Nazareno Conceição Silva de; VENTURIERI, Giorgio Cristino; http://lattes.cnpq.br/7180149611727426; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/3815182976544230
Acesso aberto (Open Access)
Aptidão reprodutiva e acasalamentos em condições artificiais na abelha sem ferrão Melipona flavolineata Friese (Hymenoptera, Apidae, Meliponini)
(Universidade Federal do Pará, 2015) VEIGA, Jamille Costa; MENEZES, Cristiano; http://lattes.cnpq.br/9845970576214577; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/3815182976544230
Acesso aberto (Open Access)
Dieta, área de uso e transporte de girinos de Ameerega trivittata (Spix, 1824) (Anura: Dendrobatidae) em uma região de floresta de terra firme na Amazônia Oriental
(Universidade Federal do Pará, 2012) LUIZ, Luciana Frazão; OLIVEIRA, Selvino Neckel de; http://lattes.cnpq.br/1315649023145433; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/3815182976544230
Acesso aberto (Open Access)
Ecologia urbana de uma abelha nativa: respostas comportamentais de colônias de uruçu amarela (Melipona flavolineata, Apidae, Meliponini) às variações climáticas em um gradiente de urbanização
(Universidade Federal do Pará, 2020-02) GATTY, Dora Carmela Ramirez; VEIGA, Jamille Costa; http://lattes.cnpq.br/2287525928643401; HTTPS://ORCID.ORG/0000-0001-7554-2785; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/0888006271965925; https://orcid.org/0000-0002-7078-5048
Urbanization can generate changes in the structure of the environment, also affecting physical- chemical processes. These changes over time have caused the loss of habitats and with them the reduction of populations of stingless bees, which are a group of insects important for the maintenance of ecosystems. Stingless bee populations, unlike the Apis genus, are at risk of reducing their population because they are not very flexible to changes and their possibility of adapting to urbanized areas is very low. For this reason, our study aimed to know the urban ecology of the stingless bee species Melipona flavolineata, measuring their responses in foraging behavior and posture to climatological parameters in environments with different degrees of urbanization (agroforestry-semi- urban and urban). We observed 12 colonies of M. flavolineata for five months. The observations were weekly, alternating internal and external activity. The rate of foraging (weekly average) was evaluated from 7:00 am to 11:00 am (time of greatest foraging) and bees were counted back to the colony, parallel to this process, data of temperature, relative humidity, luminosity and barometric pressure were recorded. The laying rate (weekly average) was assessed for four consecutive days in the corresponding week. The results showed that the climatological parameters had a high variation in the three collection points, affecting the performance of the bees. Barometric pressure and relative humidity had a positive and significant effect on pollen collection. Relative humidity and temperature had a positive and significant effect with the nectar foraging; barometric pressure had a negative, non- significant effect. The laying rate was higher as the relative humidity was added, showing a positive relationship; barometric pressure had a positive, but not significant, effect. The relationships between the foraging rate and the laying rate; as well as the relationship between the pollen foraging rate and the nectar foraging rate, were positive and significant and did not differ between environments, just by the amplitude of the data. Thus, we conclude that the stingless bee M. flavolineata is a species that is not tolerant of completely urbanized areas, and its capacity to adapt to environments with unfavorable environmental conditions is very limited, as its activities are restricted by high climatic variations and probably by the scarcity of food resources. In this sense, it would be good to implement studies of the urban ecology of smaller species, and to add in the studies of responses to climatic factors the barometric pressure parameter which, according to our results, affects the behavior of stingless bees
Acesso aberto (Open Access)
Efeitos da orfandade sobre o comportamento e longevidade de operárias de Scaptotrigona aff. postica (Hymenoptera: Apidae, Meliponini)
(Universidade Federal do Pará, 2018-04-02) LOPES, Bárbara dos Santos Conceição; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/0888006271965925
The death of the physogastric queen may imply the behavioral disorganization of eusocial bees workers, where they can assume diverse reproductive and behavioral strategies. For the worker longevity is related to the physiological effort exerted during their lifetime, but the colony's internal conditions also affect longevity, such as the presence or absence of a queen. In this sense, the objective of the study was to study the behavior and longevity of the population of stingless bee workers in orphaned colonies, comparing them with colonies with the present laying queen. In this sense, the objective of the study was to study the behavior and longevity of the population of stingless bee workers in orphaned colonies, comparing them with colonies with the present physogastric queen. For this, eight colonies of Scaptotrigona aff. postica were used, of those eight there were four colonies with a queen and four without a queen. Each colony had a total of 1.200 workers marked with different colors by day of birth (age zero), thus obtaining age groups. For 100 days, we observed the colonial foraging activity, the age of the workers who attending brood cells, age of foraging and longevity in all colonies, queenright (QR) and queenless (QL). Over time in QR colonies the foraging activity decreased slightly; however, the QL colonies presented a greater reduction in the number of foragers (X2 = 48.874; df = 1; p <0.001). In orphaned colonies we observe that over time, besides the young workers, the older workers also construct the brood cells; in the colonies with queen, the workers who participated in the construction of new brood cells were only those of young age (X2 = 116.11, df = 1, p < 0.001). In both colonies, QR and QL, the age of foraging increased over time, but in QL colonies we observed foragers with very advanced age (X2 = 66.546; df = 1; p < 0.001). The maximum longevity found for colonies workers with queen was 54 days of age and for orphaned workers was 79 days of age. Kaplan-Meier survival curves indicated significant differences between colonies QR and QL (p < 0.001). Thus, we conclude that (1) workers of S. aff. postica in colonies without queen actually decrease the external activity over time; (2) advanced orphan female workers continue to perform breeding cell construction, probably to try to produce males; (3) it is possible that the workers QL colonies start to avoid the foraging and perform this task only occasionally or they tend to perform this activity later; (4) the selfish behavior of reproducing itself, avoiding foraging and its risks, and thus staying longer in the colony can prolong the longevity of S. aff. postica in orphaned colonies.
Acesso aberto (Open Access)
Relação entre longevidade e forrageio em operárias de Melipona fasciculata Smith, 1854 (Apidae, Meliponini) em ambiente tropical
(Universidade Federal do Pará, 2013) GOMES, Rafael Leandro Corrêa; MENEZES, Cristiano; http://lattes.cnpq.br/9845970576214577; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/3815182976544230

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