Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus
Many Antarctic notothenioid species endemic to the Seasonal Pack-ice Zone have converged on adult blood serum freezing points that are several tenths of a degree above the freezing point of seawater. While these fishes share high adult serum freezing points, the development of their freeze avoidance...
Published in: | Polar Biology |
---|---|
Main Authors: | , |
Format: | Text |
Language: | unknown |
Published: |
Montclair State University Digital Commons
2010
|
Subjects: | |
Online Access: | https://digitalcommons.montclair.edu/biology-facpubs/486 https://doi.org/10.1007/s00300-010-0828-6 |
id |
ftmontclairstuni:oai:digitalcommons.montclair.edu:biology-facpubs-1485 |
---|---|
record_format |
openpolar |
spelling |
ftmontclairstuni:oai:digitalcommons.montclair.edu:biology-facpubs-1485 2024-09-30T14:23:20+00:00 Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus Bilyk, Kevin T. DeVries, Arthur L. 2010-05-31T07:00:00Z https://digitalcommons.montclair.edu/biology-facpubs/486 https://doi.org/10.1007/s00300-010-0828-6 unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/biology-facpubs/486 doi:10.1007/s00300-010-0828-6 Department of Biology Faculty Scholarship and Creative Works Antarctic fish Antifreeze Glycoprotein Chaenocephalus aceratus Channichthyidae Development Freeze avoidance Notothenioidei text 2010 ftmontclairstuni https://doi.org/10.1007/s00300-010-0828-6 2024-09-12T23:39:01Z Many Antarctic notothenioid species endemic to the Seasonal Pack-ice Zone have converged on adult blood serum freezing points that are several tenths of a degree above the freezing point of seawater. While these fishes share high adult serum freezing points, the development of their freeze avoidance during ontogeny has not been studied. We investigated this in wild caught juveniles of one such species, Chaenocephalus aceratus (family Channichthyidae), using blood serum antifreeze activity as a proxy for their freeze avoidance. Juvenile serum antifreeze activity was significantly below that of adults through the oldest year 2+ specimens collected. This increased at an estimated rate of 0.368 × 10-3 ± 0.405 × 10-4°C day-1 which, if sustained, would leave C. aceratus below their adult serum antifreeze activity levels of 0.57 ± 0.08°C until 4.2 years after hatching. Underlying the 2.7-fold increase in their serum antifreeze activity from late year 0+ juveniles to adults was an even greater 10.4-fold increase in the concentration of their serum antifreeze glycopeptides, which increased proportionally across all of their serum AFGP size isoforms. With insufficient antifreeze activity to avoid freezing in the ice-laden surface waters, both adult and juvenile C. aceratus are most likely restricted to the year round ice-free waters where a metastable supercooled state can be maintained. © 2010 Springer-Verlag. Text Antarc* Antarctic Icefish Montclair State University Digital Commons Antarctic The Antarctic Polar Biology 33 10 1387 1397 |
institution |
Open Polar |
collection |
Montclair State University Digital Commons |
op_collection_id |
ftmontclairstuni |
language |
unknown |
topic |
Antarctic fish Antifreeze Glycoprotein Chaenocephalus aceratus Channichthyidae Development Freeze avoidance Notothenioidei |
spellingShingle |
Antarctic fish Antifreeze Glycoprotein Chaenocephalus aceratus Channichthyidae Development Freeze avoidance Notothenioidei Bilyk, Kevin T. DeVries, Arthur L. Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus |
topic_facet |
Antarctic fish Antifreeze Glycoprotein Chaenocephalus aceratus Channichthyidae Development Freeze avoidance Notothenioidei |
description |
Many Antarctic notothenioid species endemic to the Seasonal Pack-ice Zone have converged on adult blood serum freezing points that are several tenths of a degree above the freezing point of seawater. While these fishes share high adult serum freezing points, the development of their freeze avoidance during ontogeny has not been studied. We investigated this in wild caught juveniles of one such species, Chaenocephalus aceratus (family Channichthyidae), using blood serum antifreeze activity as a proxy for their freeze avoidance. Juvenile serum antifreeze activity was significantly below that of adults through the oldest year 2+ specimens collected. This increased at an estimated rate of 0.368 × 10-3 ± 0.405 × 10-4°C day-1 which, if sustained, would leave C. aceratus below their adult serum antifreeze activity levels of 0.57 ± 0.08°C until 4.2 years after hatching. Underlying the 2.7-fold increase in their serum antifreeze activity from late year 0+ juveniles to adults was an even greater 10.4-fold increase in the concentration of their serum antifreeze glycopeptides, which increased proportionally across all of their serum AFGP size isoforms. With insufficient antifreeze activity to avoid freezing in the ice-laden surface waters, both adult and juvenile C. aceratus are most likely restricted to the year round ice-free waters where a metastable supercooled state can be maintained. © 2010 Springer-Verlag. |
format |
Text |
author |
Bilyk, Kevin T. DeVries, Arthur L. |
author_facet |
Bilyk, Kevin T. DeVries, Arthur L. |
author_sort |
Bilyk, Kevin T. |
title |
Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus |
title_short |
Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus |
title_full |
Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus |
title_fullStr |
Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus |
title_full_unstemmed |
Delayed onset of adult antifreeze activity in juveniles of the Antarctic icefish Chaenocephalus aceratus |
title_sort |
delayed onset of adult antifreeze activity in juveniles of the antarctic icefish chaenocephalus aceratus |
publisher |
Montclair State University Digital Commons |
publishDate |
2010 |
url |
https://digitalcommons.montclair.edu/biology-facpubs/486 https://doi.org/10.1007/s00300-010-0828-6 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Icefish |
genre_facet |
Antarc* Antarctic Icefish |
op_source |
Department of Biology Faculty Scholarship and Creative Works |
op_relation |
https://digitalcommons.montclair.edu/biology-facpubs/486 doi:10.1007/s00300-010-0828-6 |
op_doi |
https://doi.org/10.1007/s00300-010-0828-6 |
container_title |
Polar Biology |
container_volume |
33 |
container_issue |
10 |
container_start_page |
1387 |
op_container_end_page |
1397 |
_version_ |
1811637168186064896 |