Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG
Antarctic krill inhabit areas of the Southern Ocean that can exceed 4.0°C, yet they preferentially inhabit regions with temperatures of −1.5 to ≤1.5°C. Successful embryonic development and hatching are key to their life cycle, but despite the rapid climatic warming seen across their main spawning ar...
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ftpurdueuniv:oai:figshare.com:article/12545210 2023-05-15T13:36:46+02:00 Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG Frances A. Perry (7037123) So Kawaguchi (201865) Angus Atkinson (448584) Sévrine F. Sailley (7037126) Geraint A. Tarling (6688109) Daniel J. Mayor (157391) Cathy H. Lucas (7041068) R. King (8686524) A. Cooper (3537281) 2020-06-23T04:10:45Z https://doi.org/10.3389/fmars.2020.00501.s002 unknown https://figshare.com/articles/Image_2_Temperature_Induced_Hatch_Failure_and_Nauplii_Malformation_in_Antarctic_Krill_JPEG/12545210 doi:10.3389/fmars.2020.00501.s002 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic krill hatching success nauplii malformation temperature Image Figure 2020 ftpurdueuniv https://doi.org/10.3389/fmars.2020.00501.s002 2020-06-25T10:16:16Z Antarctic krill inhabit areas of the Southern Ocean that can exceed 4.0°C, yet they preferentially inhabit regions with temperatures of −1.5 to ≤1.5°C. Successful embryonic development and hatching are key to their life cycle, but despite the rapid climatic warming seen across their main spawning areas, the effects of elevated temperatures on embryogenesis, hatching success, and nauplii malformations are unknown. We incubated 24,483 krill embryos in two independent experiments to investigate the hypothesis that temperatures exceeding 1.5°C have a negative impact on hatching success and increase the numbers of malformed nauplii. Field experiments were on krill collected from near the northern, warm limit of their range and embryos incubated soon after capture, while laboratory experiments were on embryos from krill acclimated to laboratory conditions. The hatching success of embryo batches varied enormously, from 0 to 98% (mean 27%). Both field and laboratory experiments showed that hatching success decreased markedly above 3.0°C. Our field experiments also showed an approximate doubling of the percentage of malformed nauplii at elevated temperatures, reaching 50% at 5.0°C. At 3.0°C or below, however, temperature was not the main factor driving the large variation in embryo hatching success. Our observations of highly variable and often low success of hatching to healthy nauplii suggest that indices of reproductive potential of female krill relate poorly to the subsequent production of viable krill larvae and may help to explain spatial discrepancies between the distribution of the spawning stock and larval distribution. Still Image Antarc* Antarctic Antarctic Krill Southern Ocean Purdue University: e-Pubs Antarctic Southern Ocean |
institution |
Open Polar |
collection |
Purdue University: e-Pubs |
op_collection_id |
ftpurdueuniv |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic krill hatching success nauplii malformation temperature |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic krill hatching success nauplii malformation temperature Frances A. Perry (7037123) So Kawaguchi (201865) Angus Atkinson (448584) Sévrine F. Sailley (7037126) Geraint A. Tarling (6688109) Daniel J. Mayor (157391) Cathy H. Lucas (7041068) R. King (8686524) A. Cooper (3537281) Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Antarctic krill hatching success nauplii malformation temperature |
description |
Antarctic krill inhabit areas of the Southern Ocean that can exceed 4.0°C, yet they preferentially inhabit regions with temperatures of −1.5 to ≤1.5°C. Successful embryonic development and hatching are key to their life cycle, but despite the rapid climatic warming seen across their main spawning areas, the effects of elevated temperatures on embryogenesis, hatching success, and nauplii malformations are unknown. We incubated 24,483 krill embryos in two independent experiments to investigate the hypothesis that temperatures exceeding 1.5°C have a negative impact on hatching success and increase the numbers of malformed nauplii. Field experiments were on krill collected from near the northern, warm limit of their range and embryos incubated soon after capture, while laboratory experiments were on embryos from krill acclimated to laboratory conditions. The hatching success of embryo batches varied enormously, from 0 to 98% (mean 27%). Both field and laboratory experiments showed that hatching success decreased markedly above 3.0°C. Our field experiments also showed an approximate doubling of the percentage of malformed nauplii at elevated temperatures, reaching 50% at 5.0°C. At 3.0°C or below, however, temperature was not the main factor driving the large variation in embryo hatching success. Our observations of highly variable and often low success of hatching to healthy nauplii suggest that indices of reproductive potential of female krill relate poorly to the subsequent production of viable krill larvae and may help to explain spatial discrepancies between the distribution of the spawning stock and larval distribution. |
format |
Still Image |
author |
Frances A. Perry (7037123) So Kawaguchi (201865) Angus Atkinson (448584) Sévrine F. Sailley (7037126) Geraint A. Tarling (6688109) Daniel J. Mayor (157391) Cathy H. Lucas (7041068) R. King (8686524) A. Cooper (3537281) |
author_facet |
Frances A. Perry (7037123) So Kawaguchi (201865) Angus Atkinson (448584) Sévrine F. Sailley (7037126) Geraint A. Tarling (6688109) Daniel J. Mayor (157391) Cathy H. Lucas (7041068) R. King (8686524) A. Cooper (3537281) |
author_sort |
Frances A. Perry (7037123) |
title |
Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG |
title_short |
Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG |
title_full |
Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG |
title_fullStr |
Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG |
title_full_unstemmed |
Image_2_Temperature–Induced Hatch Failure and Nauplii Malformation in Antarctic Krill.JPEG |
title_sort |
image_2_temperature–induced hatch failure and nauplii malformation in antarctic krill.jpeg |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00501.s002 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Southern Ocean |
op_relation |
https://figshare.com/articles/Image_2_Temperature_Induced_Hatch_Failure_and_Nauplii_Malformation_in_Antarctic_Krill_JPEG/12545210 doi:10.3389/fmars.2020.00501.s002 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2020.00501.s002 |
_version_ |
1766083560767225856 |