Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin
Abstract In a recent study of the hemlock looper ( HL ), L ambdina fiscellaria ( G uenée) ( L epidoptera: G eometridae), long exposure of early‐diapausing eggs to high temperatures considerably reduced their ability to hatch. This finding raised the possibility that adults could also be negatively a...
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crwiley:10.1111/eea.12469 2024-06-02T08:10:46+00:00 Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin Delisle, Johanne Bernier‐Cardou, Michèle Laroche, Ghislaine Canadian Forest Service of Natural Resources Canada 2016 http://dx.doi.org/10.1111/eea.12469 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feea.12469 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eea.12469 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Entomologia Experimentalis et Applicata volume 161, issue 3, page 219-231 ISSN 0013-8703 1570-7458 journal-article 2016 crwiley https://doi.org/10.1111/eea.12469 2024-05-03T11:52:43Z Abstract In a recent study of the hemlock looper ( HL ), L ambdina fiscellaria ( G uenée) ( L epidoptera: G eometridae), long exposure of early‐diapausing eggs to high temperatures considerably reduced their ability to hatch. This finding raised the possibility that adults could also be negatively affected by increasing temperatures if they reproduced too early in the season in response to global warming. To investigate this hypothesis, newly formed HL pupae from three populations of eastern Canada ‐ Quebec ( QC ), Newfoundland ( NL ), and Labrador (LB) ‐ were submitted to four constant temperatures (10, 15, 20, or 25 °C) during pupal and adult development. The effect of population origin on HL reproduction was generally negligible. Mating probability was high at 15 and 20 °C (0.86 and 0.83, respectively), quite low at 10 °C (0.53), and even lower at 25 °C (0.38). Mating started earlier in the night and lasted longer as temperature decreased. Both productivity and absolute fecundity increased when temperature increased from 10 to 15 °C and then decreased slowly as temperature increased further. Over populations and temperatures, relative fecundity averaged 0.95, indicating that females had enough time to lay most of their eggs before they died. High temperatures had a deleterious effect on egg fertility: between 10 and 20 °C, relative fertility was about 0.90, but it dropped to 0.51 at 25 °C. The average proportion of fertile eggs declined from 0.88 in the first quarter of the egg‐laying period to 0.57 in the last quarter, suggesting lower sperm count or viability, or deterioration of the oocytes as the egg‐laying period progresses. Based on these findings, we argue that the production of an additional fifth instar among HL populations of southern origin can be viewed as an adaptive mechanism allowing adults to postpone reproduction or the egg‐laying period in order to mitigate the detrimental effect of high temperatures on their probability of mating successfully or that of laying fertile eggs. Article in Journal/Newspaper Newfoundland Wiley Online Library Canada Newfoundland Entomologia Experimentalis et Applicata 161 3 219 231 |
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English |
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Abstract In a recent study of the hemlock looper ( HL ), L ambdina fiscellaria ( G uenée) ( L epidoptera: G eometridae), long exposure of early‐diapausing eggs to high temperatures considerably reduced their ability to hatch. This finding raised the possibility that adults could also be negatively affected by increasing temperatures if they reproduced too early in the season in response to global warming. To investigate this hypothesis, newly formed HL pupae from three populations of eastern Canada ‐ Quebec ( QC ), Newfoundland ( NL ), and Labrador (LB) ‐ were submitted to four constant temperatures (10, 15, 20, or 25 °C) during pupal and adult development. The effect of population origin on HL reproduction was generally negligible. Mating probability was high at 15 and 20 °C (0.86 and 0.83, respectively), quite low at 10 °C (0.53), and even lower at 25 °C (0.38). Mating started earlier in the night and lasted longer as temperature decreased. Both productivity and absolute fecundity increased when temperature increased from 10 to 15 °C and then decreased slowly as temperature increased further. Over populations and temperatures, relative fecundity averaged 0.95, indicating that females had enough time to lay most of their eggs before they died. High temperatures had a deleterious effect on egg fertility: between 10 and 20 °C, relative fertility was about 0.90, but it dropped to 0.51 at 25 °C. The average proportion of fertile eggs declined from 0.88 in the first quarter of the egg‐laying period to 0.57 in the last quarter, suggesting lower sperm count or viability, or deterioration of the oocytes as the egg‐laying period progresses. Based on these findings, we argue that the production of an additional fifth instar among HL populations of southern origin can be viewed as an adaptive mechanism allowing adults to postpone reproduction or the egg‐laying period in order to mitigate the detrimental effect of high temperatures on their probability of mating successfully or that of laying fertile eggs. |
author2 |
Canadian Forest Service of Natural Resources Canada |
format |
Article in Journal/Newspaper |
author |
Delisle, Johanne Bernier‐Cardou, Michèle Laroche, Ghislaine |
spellingShingle |
Delisle, Johanne Bernier‐Cardou, Michèle Laroche, Ghislaine Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin |
author_facet |
Delisle, Johanne Bernier‐Cardou, Michèle Laroche, Ghislaine |
author_sort |
Delisle, Johanne |
title |
Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin |
title_short |
Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin |
title_full |
Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin |
title_fullStr |
Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin |
title_full_unstemmed |
Reproductive performance of the hemlock looper, Lambdina fiscellaria, as a function of temperature and population origin |
title_sort |
reproductive performance of the hemlock looper, lambdina fiscellaria, as a function of temperature and population origin |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/eea.12469 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feea.12469 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eea.12469 |
geographic |
Canada Newfoundland |
geographic_facet |
Canada Newfoundland |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Entomologia Experimentalis et Applicata volume 161, issue 3, page 219-231 ISSN 0013-8703 1570-7458 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eea.12469 |
container_title |
Entomologia Experimentalis et Applicata |
container_volume |
161 |
container_issue |
3 |
container_start_page |
219 |
op_container_end_page |
231 |
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1800756692527349760 |