The role of the pineal gland in the photoperiodic control of bird song frequency and repertoire in the house sparrow, Passer domesticus

Wang, Gang; Harpole, Clifford E.; Paulose, Jiffin K.; Cassone, Vincent M.

doi:10.1016/j.yhbeh.2014.02.008

Cited by 13 publications

(10 citation statements)

References 53 publications

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“…ALAN can also affect reproduction status in birds by interfering with the male copulatory vocalization that advances ovarian maturation and female nesting behavior (Brockway 1969;Hinde & Steel 1978). Indeed, photoperiodic information may regulate the activity of the high vocal center nucleus responsible for controlling vocal behavior in male birds, 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 probably because of the involvement of the pineal gland (Wang et al 2014). Moreover, we found significant differences in disease severity scores for FM and KS between ALAN exposed birds and controls.…”

Section: Discussionmentioning

confidence: 99%

Bright artificial light at night is associated with increased body mass, poor reproductive success and compromised disease tolerance in Australian budgerigars (Melopsittacus undulatus)

Malek

Haim

2019

Integrative Zoology

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Artificial light at night (ALAN) can cause circadian disruption and result in adverse behavioral and ecological effects in free‐living birds, but studies on captive pet birds as companion animals have been infrequent. We studied the effects of exposure to bright ALAN on body mass, melatonin sulfate levels, reproduction and disease severity in Australian budgerigars (Melopsittacus undulatus) kept in captivity. During the experiment, birds were kept under outdoor temperature, humidity and natural photoperiod from September to December. A total of 48 birds were equally split into 4 groups (6 mating pairs each) and concurrently exposed to ALAN of 200 lux with different duration (0, 30, 60 and 90 min). Monthly observations were recorded for all dependent parameters. ALAN exposure increased mass gain and suppressed melatonin levels in a dose‐dependent manner, especially during December. In addition, ALAN exposure in all duration groups decreased egg production and reduced hatchability from 61% ± 14% in the ALAN‐unexposed control group to 0% in the ALAN‐exposed birds. Disease severity was also found to increase in line with the duration of ALAN exposure. In captive M. undulatus, ALAN exposure was demonstrated to affect photoperiodic regulation with subsequent excess mass gain and reproduction impairment, and increased susceptibility to infections plausibly through duration dose‐dependent suppression of melatonin. To the best of our knowledge, this is the first study to demonstrate a possible association between acute bright ALAN of increasing duration and both natural development of infections as well as reproductive cessation in captive birds. Our findings could be used to improve breeding conditions of captive birds.

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Section: Discussionmentioning

confidence: 99%

Bright artificial light at night is associated with increased body mass, poor reproductive success and compromised disease tolerance in Australian budgerigars (Melopsittacus undulatus)

Malek

Haim

2019

Integrative Zoology

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“…There could, of course, be unmeasured variables that contribute to beak shape differences. Among the other factors known to cause beak shape differences, phylogenetic inertia (Shao et al 2016) is unlikely because it is a within-species comparison, and if divergent song preferences (Huber and Podos 2006;Badyaev et al 2008) would cause beak morphology to differ from the ecological optimum, we could expect sexual dimorphism because males are more frequently vocalizing and are the only sex expressing song motifs (Wang et al 2014). Because we do not find significant sexual dimorphism, selection on song is probably not strongly affecting the beak shape in these sparrow populations.…”

Section: Discussionmentioning

confidence: 99%

Genomic Contingencies and the Potential for Local Adaptation in a Hybrid Species

Runemark

Fernández

Eroukhmanoff

et al. 2018

The American Naturalist

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Hybridization is increasingly recognized as a potent evolutionary force. Although additive genetic variation and novel combinations of parental genes theoretically increase the potential for hybrid species to adapt, few empirical studies have investigated the adaptive potential within a hybrid species. Here, we address whether genomic contingencies, adaptation to climate, or diet best explain divergence in beak morphology using genomically diverged island populations of the homoploid hybrid Italian sparrow Passer italiae from Crete, Corsica, and Sicily. Populations vary significantly in beak morphology both between and within islands of origin. Temperature seasonality best explains population divergence in beak size. Interestingly, beak shape along all significant dimensions of variation was best explained by annual precipitation, genomic composition, and their interaction, suggesting a role for contingencies. Moreover, beak shape similarity to a parent species correlates with proportion of the genome inherited from that species, consistent with the presence of contingencies. In conclusion, adaptation to local conditions and genomic contingencies arising from putatively independent hybridization events jointly explain beak morphology in the Italian sparrow. Hence, hybridization may induce contingencies and restrict evolution in certain directions dependent on the genetic background.

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“…Robertson et al, 2014). The pathways for this direct effect may well operate through melatonin (Wang et al, 2014). If so they are again "indirect" and we are still looking for a true direct impact of day length on neural machinery.…”

Section: Seasonality Within the Brain Itselfmentioning

confidence: 99%

“Seasonal changes in the neuroendocrine system”: Some reflections

Follett

2015

Frontiers in Neuroendocrinology

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The role of the pineal gland in the photoperiodic control of bird song frequency and repertoire in the house sparrow, Passer domesticus

Cited by 13 publications

References 53 publications

Bright artificial light at night is associated with increased body mass, poor reproductive success and compromised disease tolerance in Australian budgerigars (Melopsittacus undulatus)

Bright artificial light at night is associated with increased body mass, poor reproductive success and compromised disease tolerance in Australian budgerigars (Melopsittacus undulatus)

Genomic Contingencies and the Potential for Local Adaptation in a Hybrid Species

“Seasonal changes in the neuroendocrine system”: Some reflections

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