No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)

Locally-adapted subpopulations of Atlantic cod are found in both the northwest and northeast Atlantic and exhibit differences in morphology, behavior and physiological characteristics. We conducted experiments to determine if demonstrable differences were evident in egg buoyancy and antifreeze glyco...

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Published in:Fisheries Research
Main Authors: Clapp, Amanda R., Smith, Todd R., Kovach, Adrienne I., Berlinsky, David L.
Format: Text
Language:unknown
Published: University of New Hampshire Scholars' Repository 2013
Subjects:
Online Access:https://scholars.unh.edu/nhaes/46
https://doi.org/10.1016/j.fishres.2012.05.005
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spelling ftuninhampshire:oai:scholars.unh.edu:nhaes-1045 2023-05-15T15:27:18+02:00 No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua) Clapp, Amanda R. Smith, Todd R. Kovach, Adrienne I. Berlinsky, David L. 2013-04-01T07:00:00Z https://scholars.unh.edu/nhaes/46 https://doi.org/10.1016/j.fishres.2012.05.005 unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/nhaes/46 http://dx.doi.org/10.1016/j.fishres.2012.05.005 © 2012 Elsevier B.V. All rights reserved. New Hampshire Agricultural Experiment Station Publications Scientific Contribution Number 2484 Aquaculture and Fisheries text 2013 ftuninhampshire https://doi.org/10.1016/j.fishres.2012.05.005 2023-01-30T21:27:47Z Locally-adapted subpopulations of Atlantic cod are found in both the northwest and northeast Atlantic and exhibit differences in morphology, behavior and physiological characteristics. We conducted experiments to determine if demonstrable differences were evident in egg buoyancy and antifreeze glycoprotein production between captive populations of genetically divergent winter and spring-spawning cod from the Gulf of Maine. Fertilized eggs (<24 h post-spawning) were collected from both populations on 3 dates and transferred to 3 controlled-temperature rooms (5, 10, and 12 degrees C). Egg buoyancy was determined in triplicate samples, at each temperature, in seawater ranging from 28 to 35 ppt with 0.5 ppt increments. No significant differences in mean neutral buoyancy (similar to 1.024 g/mL) were found between stocks or treatment temperatures. Antifreeze glycoprotein (AFGP) production was examined in captive-bred cod juveniles (13-24 cm) from both populations held at 0 degrees C for periods ranging from 20 to 35 days. AFGP were first produced on day 30, although no differences were found in AFGP production in either population. Our results do not support the hypothesis that physiological differences in egg buoyancy and anti-freeze protein product exist between these two cod populations. The similarity in expression of these traits may reflect the high level of nutrition that both broodstock populations received, and the common juvenile size during cold-water exposure. (C) 2012 Elsevier B.V. All rights reserved. Text atlantic cod Gadus morhua Northeast Atlantic University of New Hampshire: Scholars Repository Fisheries Research 141 130 135
institution Open Polar
collection University of New Hampshire: Scholars Repository
op_collection_id ftuninhampshire
language unknown
topic Scientific Contribution Number 2484
Aquaculture and Fisheries
spellingShingle Scientific Contribution Number 2484
Aquaculture and Fisheries
Clapp, Amanda R.
Smith, Todd R.
Kovach, Adrienne I.
Berlinsky, David L.
No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)
topic_facet Scientific Contribution Number 2484
Aquaculture and Fisheries
description Locally-adapted subpopulations of Atlantic cod are found in both the northwest and northeast Atlantic and exhibit differences in morphology, behavior and physiological characteristics. We conducted experiments to determine if demonstrable differences were evident in egg buoyancy and antifreeze glycoprotein production between captive populations of genetically divergent winter and spring-spawning cod from the Gulf of Maine. Fertilized eggs (<24 h post-spawning) were collected from both populations on 3 dates and transferred to 3 controlled-temperature rooms (5, 10, and 12 degrees C). Egg buoyancy was determined in triplicate samples, at each temperature, in seawater ranging from 28 to 35 ppt with 0.5 ppt increments. No significant differences in mean neutral buoyancy (similar to 1.024 g/mL) were found between stocks or treatment temperatures. Antifreeze glycoprotein (AFGP) production was examined in captive-bred cod juveniles (13-24 cm) from both populations held at 0 degrees C for periods ranging from 20 to 35 days. AFGP were first produced on day 30, although no differences were found in AFGP production in either population. Our results do not support the hypothesis that physiological differences in egg buoyancy and anti-freeze protein product exist between these two cod populations. The similarity in expression of these traits may reflect the high level of nutrition that both broodstock populations received, and the common juvenile size during cold-water exposure. (C) 2012 Elsevier B.V. All rights reserved.
format Text
author Clapp, Amanda R.
Smith, Todd R.
Kovach, Adrienne I.
Berlinsky, David L.
author_facet Clapp, Amanda R.
Smith, Todd R.
Kovach, Adrienne I.
Berlinsky, David L.
author_sort Clapp, Amanda R.
title No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)
title_short No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)
title_full No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)
title_fullStr No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)
title_full_unstemmed No differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of Gulf of Maine Atlantic Cod (Gadus morhua)
title_sort no differences in egg buoyancy and anti-freeze protein production in genetically divergent subpopulations of gulf of maine atlantic cod (gadus morhua)
publisher University of New Hampshire Scholars' Repository
publishDate 2013
url https://scholars.unh.edu/nhaes/46
https://doi.org/10.1016/j.fishres.2012.05.005
genre atlantic cod
Gadus morhua
Northeast Atlantic
genre_facet atlantic cod
Gadus morhua
Northeast Atlantic
op_source New Hampshire Agricultural Experiment Station Publications
op_relation https://scholars.unh.edu/nhaes/46
http://dx.doi.org/10.1016/j.fishres.2012.05.005
op_rights © 2012 Elsevier B.V. All rights reserved.
op_doi https://doi.org/10.1016/j.fishres.2012.05.005
container_title Fisheries Research
container_volume 141
container_start_page 130
op_container_end_page 135
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