Effects of short-term fasting on energy reserves of vampire bats (Desmodus rotundus)

Freitas, Mariella Bontempo; Passos, Cejana B.C.; Vasconcelos, Rosângela Batista de; Pinheiro, Eliana C.

doi:10.1016/j.cbpc.2004.09.023

Cited by 18 publications

(18 citation statements)

References 7 publications

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“…Plasma glucose levels in both male and female fed bats, for instance, were similar to those reported for other bat species (Freitas et al, 2005;Pinheiro et al, 2006) or other mammals also fed with HP diets (Kettelhut et al, 1980;Opazo et al, 2004). Despite this similarity, Molossus molossus responses to fasting differed significantly between sexes.…”

Section: Discussionsupporting

confidence: 76%

“…This unique mammal consumes his blood meal every night, but shows severe hypoglycemia when submitted to fasting, not being able to keep plasma glucose concentrations compatible to life for after only 12 hours of fasting, which characterises the species, unlike the others also fed on protein diets, as highly susceptible to fasting. This pattern seem to be shaped mainly due to its limited ability to store energy fuels when food is available and/or mobilise existing stores when food is scarce (Freitas et al, 2003(Freitas et al, , 2005(Freitas et al, , 2006.…”

Section: Introductionmentioning

confidence: 99%

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Energy metabolism and fasting in male and female insectivorous bats Molossus molossus (Chiroptera: Molossidae)

et al. 2010

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Metabolic adaptations induced by 24 and 48 hours of fasting were investigated in male and female insectivorous bats (Molossus molossus Pallas, 1766). For this purpose, plasma glucose, non esterified fatty acids (NEFA), glycogen, protein and lipids concentrations in liver and muscles were obtained. Data presented here demonstrate that fed bats showed plasma glucose levels similar to those reported for other mammal species. In response to fasting, glycemia was decreased only in 48 hours fasted females. Plasma NEFA levels were similar in both sexes, and did not exhibit any changes during fasting. Considering the data from energy reserve variations, fed females presented an increased content of liver glycogen as well as higher breast muscle protein and limbs lipids concentrations, compared to fed males. In response to fasting, liver and muscle glycogen levels remained unchanged. Considering protein and lipid reserves, only females showed decreased values following fasting, as seen in breast, limbs and carcass lipids and breast muscle protein reserves, but still fail to keep glucose homeostasis after 48 hours without food. Taken together, our data suggest that the energy metabolism of insectivorous bats may vary according to sexual differences, a pattern that might be associated to different reproduction investments and costs between genders.Keywords: plasma glucose, glycogen, insectivorous bats, metabolism, Molossus molossus.Metabolismo energético e resposta ao jejum em morcegos insetívoros Molossus molossus (Chirpotera: Molossidae) ResumoAs adaptações metabólicas induzidas pelo jejum foram investigadas em morcegos insetívoros machos e fêmeas (Molossus molossus Pallas, 1766) alimentados e submetidos ao jejum por 24 e 48 horas. Para este propósito, análises plasmáticas de glucose, ácidos graxos livres, glicogênio, proteína e lipídios do fígado e músculos foram analisados. Os dados obtidos demonstraram que o nível de glicose plasmática em morcegos alimentados foi similar ao apresentado por outras espécies de mamíferos. No entanto, em resposta ao jejum, a glicemia de fêmeas diminuiu significativamente após 48 horas, enquanto os níveis circulantes de machos permaneceram constantes. Os níveis de ácidos graxos não esterificados no plasma foram similares em ambos os sexos, e não houve mudança durante o jejum. Em relação às reservas energéticas, fêmeas alimentadas apresentaram maior teor de glicogênio no fígado, de proteína armazenada no músculo peitoral e lipídios nos músculos dos membros anteriores e posteriores, em comparação aos machos alimentados. Em resposta ao jejum, somente as fêmeas mostraram diminuição de algumas reservas energéticas, como a reserva lipídica dos músculos dos membros anteriores e posteriores, da carcaça e da reserva proteica do músculo peitoral. Apesar desta mobilização, as fêmeas, diferentemente dos machos, demonstraram uma incapacidade de manter a homeostase da glicose após 48 horas sem o alimento. Nossos dados sugerem que o metabolismo energético de morcegos insetívoros varia de acordo c...

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Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Energy metabolism and fasting in male and female insectivorous bats Molossus molossus (Chiroptera: Molossidae)

et al. 2010

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“…However, adult bats that are well fed will also regurgitate to bats in need. This situation occurs regularly because 18% of bats fail to obtain a blood meal [68] and unfed bats are susceptible to starvation owing to their limited ability to store energy [72,73]. By receiving regurgitations, a hungry bat can regain 20% of its mass lost from 24 h of fasting [68,74].…”

Section: Food Sharingmentioning

confidence: 99%

Non-kin cooperation in bats

Wilkinson

Carter

Bohn

et al. 2016

Phil. Trans. R. Soc. B

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One contribution of 18 to a theme issue 'The evolution of cooperation based on direct fitness benefits'. Many bats are extremely social. In some cases, individuals remain together for years or even decades and engage in mutually beneficial behaviours among non-related individuals. Here, we summarize ways in which unrelated bats cooperate while roosting, foraging, feeding or caring for offspring. For each situation, we ask if cooperation involves an investment, and if so, what mechanisms might ensure a return. While some cooperative outcomes are likely a by-product of selfish behaviour as they are in many other vertebrates, we explain how cooperative investments can occur in several situations and are particularly evident in food sharing among common vampire bats (Desmodus rotundus) and alloparental care by greater spear-nosed bats (Phyllostomus hastatus). Fieldwork and experiments on vampire bats indicate that sharing blood with non-kin expands the number of possible donors beyond kin and promotes reciprocal help by strengthening long-term social bonds. Similarly, more than 25 years of recapture data and field observations of greater spearnosed bats reveal multiple cooperative investments occurring within stable groups of non-kin. These studies illustrate how bats can serve as models for understanding how cooperation is regulated in social vertebrates.

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“…Estudos realizados com morcegos hematófagos Desmodus rotundus no Cerrado (Freitas et al 2003(Freitas et al , 2005(Freitas et al , 2006 (Fahrig, 2003;Viana et al, 1997;Wilcove et al, 1986).…”

Section: Efeito Da Fragmentação Sobre Morcegosunclassified

“…Esse morcego é hematófago e seu comportamento metabólico e dieta são muito particulares (Freitas et al, 2006(Freitas et al, , 2005(Freitas et al, , 2003.…”

Section: Efeito Da Fragmentação Sobre Morcegosunclassified

Avaliação fisiológica de morcegos frugívoros neotropicais e estruturação da assembleia causado pela alteração de habitat no cerrado

Amaral¹

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Effects of short-term fasting on energy reserves of vampire bats (Desmodus rotundus)

Cited by 18 publications

References 7 publications

Energy metabolism and fasting in male and female insectivorous bats Molossus molossus (Chiroptera: Molossidae)

Energy metabolism and fasting in male and female insectivorous bats Molossus molossus (Chiroptera: Molossidae)

Non-kin cooperation in bats

Avaliação fisiológica de morcegos frugívoros neotropicais e estruturação da assembleia causado pela alteração de habitat no cerrado

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