Banca de DEFESA: JEAN PATRICK DA SILVA JORGE

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JEAN PATRICK DA SILVA JORGE
DATE: 06/03/2020
TIME: 14:30
LOCAL: sala de videoconferência POP-Rn NO CENTRO DE CONVIVÊNCIA DA UFRN.
TITLE:

INDIVIDUAL AND INTERACTIVE EFFECTS OF PREDATION RISK, RESOURCE AVAILABILITY AND HABITAT SIZE ON THE BEHAVOIR OF OVIPOSITION HABITAT SELECTION OF THE MOSQUITO AEDES AEGYPTI (LINNAEUS; CULICIDAE)


KEY WORDS:

behavior, habitat selection, oviposition, mosquitoes, Aedes aegypti, trade-off, predation risk


PAGES: 36
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

ABSTRACT. Oviposition habitat selection is a crucial process for species with complex life cycle, such as the dengue mosquito, Aedes aegypti. The choice of gravid female searching for oviposition site depends on the quality of available habitat. Quality assessment made by the female is based on the physical and chemical habitat caracteristics, wich lately indicate the expected fitness. Based on the assessment of the habitats emanating cues females must respond in order to select the most suitable habitats for survival, growth and development of offspring. Natural selection tends to favor oviposition strategies that maximize parental fitness. In an environment with quality habitats varying in multiple factors, female mosquitoes must perform complex integration of cues and respond to this variation through trade-off. However, there is still little knowledge of how multiple interacting factors affect the assessment of the habitat quality and the females laying eggs response. In order to assess the individual and interactive effects of predation risk, habitat size and resource availability on oviposition habitat selection behavior for Aedes aegypti mosquito, a laboratory experiment with a 2 × 2 × 2 design was carried out. Using artificial containers, the absence or presence of cues from the predator Poecilia vivípara, greater or lesser habitat size (depth) and high or low availability of resources were crossed. Females oviposited more frequently and in greater quantity in habitats considered to be of higher quality (without risk, larger and with high resource). The qualitative decision, denoted by the proportion of oviposited replicas per female, was affected by the risk × resource interaction. Only resource and habitat size had a significant individual effect on this variable. The quantitative decision, denoted by the proportion of the total number of eggs laid per female, was significantly affected by the interactions between risk × resource and resource × habitat size. Again, only resource and habitat size had a significant individual effect. These results confirm that females of Aedes aegypti in search of oviposition sites prefer habitats considered of better quality for oviposit, depositing eggs more frequently and in greater quantity. Such a response proves to be quite complex and seems to be influenced by a trade-off between the predation risk and resource availability and, also, between resource availability and habitat size. This demonstrates that there is an interdependence between the factors that indicate habitat quality in conducting oviposition habitat selection.ion. These findings are relevant for the development of more effective population control strategies for mosquitoes that carry disease and for understanding the patterns of distribution and abundance of species that use temporary aquatic habitats.


BANKING MEMBERS:
Presidente - 1434166 - LUCIANA SILVA CARNEIRO
Interno - 1714892 - ADRIANO CALIMAN FERREIRA DA SILVA
Externo à Instituição - RAFAEL DETTOGNI GUARIENTO - UFMS
Notícia cadastrada em: 27/02/2020 17:12
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