Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin
The fire ant, Solenopsis invicta, is one of the most successful of the invasive eusocial invertebrates. The fire ant’s prolific reproductive capacity and its division of labor among five fertility castes are key factors to its successful invasion and global colonization across all continents except...
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ftusouthflorida:oai:digitalcommons.usf.edu:etd-10605 2023-07-30T03:59:18+02:00 Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin Masnjak, Alexis 2022-06-24T07:00:00Z application/pdf https://digitalcommons.usf.edu/etd/9408 https://digitalcommons.usf.edu/context/etd/article/10605/viewcontent/Masnjak_usf_0206M_17427.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/etd/9408 https://digitalcommons.usf.edu/context/etd/article/10605/viewcontent/Masnjak_usf_0206M_17427.pdf USF Tampa Graduate Theses and Dissertations Brood care Maternal investment Neurotransmitters Social insects Biology thesis 2022 ftusouthflorida 2023-07-13T23:08:58Z The fire ant, Solenopsis invicta, is one of the most successful of the invasive eusocial invertebrates. The fire ant’s prolific reproductive capacity and its division of labor among five fertility castes are key factors to its successful invasion and global colonization across all continents except Antarctica. Although the rate of self-care and brood care by sterile S. invicta workers is well known, little is known about the rate of self-care and brood care by the other four fertility castes. In this study, I quantified the frequency and duration of behaviors by alate males, alate queens, newly mated queens, older mature queens, and sterile workers over six-hour periods (n = 12 individuals per caste). I found that newly mated queens and sterile workers engaged in brood care for the longest durations and at the highest frequencies. In contrast, alate males, alate queens, and older mated queens spent the majority of their time engaged in self-care behaviors. The social hormones, oxytocin and vasopressin, are found across the full spectrum of animal species including mammals, birds, reptiles, amphibians, fish, insects, and annelids. Oxytocin homologs play an essential role in reproductive processes including pair-bonding, mate selection, the induction of contractions during egg-laying and live mammalian birth and extended maternal care of offspring after hatch or birth. Inotocin, a homolog of oxytocin-vasopressin, has been characterized in social insects, but yet to be identified in S. invicta. Here, the S. invicta inotocin precursor mRNA was amplified using reverse transcriptase polymerase chain reaction (PCR) and confirmed by DNA sequencing. Using quantitative PCR, S. invicta inotocin precursor mRNA was expressed in newly mated queens. These findings provide valuable information to further investigate the physiological mechanisms driving brood care in a highly invasive species. Thesis Antarc* Antarctica University of South Florida St. Petersburg: Digital USFSP |
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Open Polar |
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University of South Florida St. Petersburg: Digital USFSP |
op_collection_id |
ftusouthflorida |
language |
unknown |
topic |
Brood care Maternal investment Neurotransmitters Social insects Biology |
spellingShingle |
Brood care Maternal investment Neurotransmitters Social insects Biology Masnjak, Alexis Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin |
topic_facet |
Brood care Maternal investment Neurotransmitters Social insects Biology |
description |
The fire ant, Solenopsis invicta, is one of the most successful of the invasive eusocial invertebrates. The fire ant’s prolific reproductive capacity and its division of labor among five fertility castes are key factors to its successful invasion and global colonization across all continents except Antarctica. Although the rate of self-care and brood care by sterile S. invicta workers is well known, little is known about the rate of self-care and brood care by the other four fertility castes. In this study, I quantified the frequency and duration of behaviors by alate males, alate queens, newly mated queens, older mature queens, and sterile workers over six-hour periods (n = 12 individuals per caste). I found that newly mated queens and sterile workers engaged in brood care for the longest durations and at the highest frequencies. In contrast, alate males, alate queens, and older mated queens spent the majority of their time engaged in self-care behaviors. The social hormones, oxytocin and vasopressin, are found across the full spectrum of animal species including mammals, birds, reptiles, amphibians, fish, insects, and annelids. Oxytocin homologs play an essential role in reproductive processes including pair-bonding, mate selection, the induction of contractions during egg-laying and live mammalian birth and extended maternal care of offspring after hatch or birth. Inotocin, a homolog of oxytocin-vasopressin, has been characterized in social insects, but yet to be identified in S. invicta. Here, the S. invicta inotocin precursor mRNA was amplified using reverse transcriptase polymerase chain reaction (PCR) and confirmed by DNA sequencing. Using quantitative PCR, S. invicta inotocin precursor mRNA was expressed in newly mated queens. These findings provide valuable information to further investigate the physiological mechanisms driving brood care in a highly invasive species. |
format |
Thesis |
author |
Masnjak, Alexis |
author_facet |
Masnjak, Alexis |
author_sort |
Masnjak, Alexis |
title |
Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin |
title_short |
Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin |
title_full |
Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin |
title_fullStr |
Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin |
title_full_unstemmed |
Comparing Brood Care Behaviors Across Five Fertility Castes in The Invasive Fire Ant,Solenopsis invicta,and the Expression of Inotocin |
title_sort |
comparing brood care behaviors across five fertility castes in the invasive fire ant,solenopsis invicta,and the expression of inotocin |
publisher |
Digital Commons @ University of South Florida |
publishDate |
2022 |
url |
https://digitalcommons.usf.edu/etd/9408 https://digitalcommons.usf.edu/context/etd/article/10605/viewcontent/Masnjak_usf_0206M_17427.pdf |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
USF Tampa Graduate Theses and Dissertations |
op_relation |
https://digitalcommons.usf.edu/etd/9408 https://digitalcommons.usf.edu/context/etd/article/10605/viewcontent/Masnjak_usf_0206M_17427.pdf |
_version_ |
1772810065621811200 |