skip to content
Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages Preview this item
ClosePreview this item
Checking...

Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages

Author: E A Trippel; Canada. Department of Fisheries and Oceans. Biological Station (St. Andrews, N.B.); et al
Publisher: St. Andrews, N.B. : Fisheries and Oceans Canada, 2011.
Series: Canadian technical report of fisheries and aquatic sciences (Online), 2925.
Edition/Format:   eBook : Document : National government publication : EnglishView all editions and formats
Summary:
Mariculture of Atlantic cod (Gadus morhua) in the Bay of Fundy was initiated in the early 2000s and early maturation has been a persistent problem since its inception. The objectives of the present study were to evaluate, over separate two-year periods, whether 20 and 24 h light exposure compared to natural photoperiod in sea cages will (i) increase body growth, (ii) halt or delay sexual maturation, (iii) influence  Read more...
Rating:

(not yet rated) 0 with reviews - Be the first.

Subjects
More like this

 

Find a copy online

Links to this item

Find a copy in the library

&AllPage.SpinnerRetrieving; Finding libraries that hold this item...

Details

Additional Physical Format: Print version:
Effects of Extended Photoperiods and Light Intensities on Growth, Sexual Maturation and Tissue Water Content of Atlantic Cod (Gadus Morhua) in Sea Cages.
St. Andrews, N.B. : Fisheries and Oceans Canada, 2011
(OCoLC)742363988
Material Type: Document, Government publication, National government publication, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: E A Trippel; Canada. Department of Fisheries and Oceans. Biological Station (St. Andrews, N.B.); et al
OCLC Number: 794618755
Language Note: Includes abstract in French.
Notes: "This is the two thousand nine hundred and twenty fifth technical report of the Biological Station, St. Andrews, NB".
Distributed by the Government of Canada Depository Services Program (Weekly checklist 2012-17).
Reproduction Notes: Electronic reproduction. [S.l.] : HathiTrust Digital Library, 2011. MiAaHDL
Description: 1 online resource.
Details: Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002.
Series Title: Canadian technical report of fisheries and aquatic sciences (Online), 2925.
Responsibility: by E.A. Trippel ... [et al.].

Abstract:

Mariculture of Atlantic cod (Gadus morhua) in the Bay of Fundy was initiated in the early 2000s and early maturation has been a persistent problem since its inception. The objectives of the present study were to evaluate, over separate two-year periods, whether 20 and 24 h light exposure compared to natural photoperiod in sea cages will (i) increase body growth, (ii) halt or delay sexual maturation, (iii) influence investment in reproductive tissue as reflected in gonad weight, and (iv) affect seasonal levels of water content in muscle and liver tissue of Atlantic cod. A positive growth response to extended daylength (20 and 24 h light) was observed, though these light treatments did not influence the incidence of sexual maturation of either sex. The greater light intensity used at the Fundy site (4.8 kHz) compared to Kelly Cove (1.6 kHz) also did not reduce incidence of maturity. Proportion of fish sampled that were mature was often>90%. Immature cod of each gender were reported to grow at slower rates than mature cod and this trend was consistent across all treatments and multiple years. Implementation of extended daylength did, however, result in delaying attainment of sexual maturation by 3 months. Of particular note is the lower reproductive investment (i.e., female GSI values) observed after two years of 20 h daily illumination. Water content of fillet muscle was surprisingly quite constant throughout the study with only minor variation. In the Fundy site, percent water content of muscle tissue of adult females commonly ranged from 78-83%, regardless of light treatment. Water content of muscle of immature females ranged from 80-83%. Spawning females occasionally exhibited the highest water content over other adult females (+5-10% at Kelly Cove; +2-3% at Fundy site). Hepatosomatic index was greatest during the winter/spring period and for pre-spawning fish. Investment in liver tissue was lowest for immature fish. Water content of liver tissue ranged from 25-50%. Our results suggest the use of extended daylength to improve growth and change the timing and investment in reproduction holds some promise for Atlantic cod mariculture. Light measurements verified the inability of artificial light to equal the much stronger ambient light cycle further indicating the difficulty in influencing fish physiological cycles compared to lab experiments with light tight lids.

Reviews

User-contributed reviews
Retrieving GoodReads reviews...
Retrieving DOGObooks reviews...

Tags

Be the first.
Confirm this request

You may have already requested this item. Please select Ok if you would like to proceed with this request anyway.

Linked Data


Primary Entity

<http://www.worldcat.org/oclc/794618755> # Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages
    a schema:Book, schema:CreativeWork, schema:MediaObject ;
    library:oclcnum "794618755" ;
    library:placeOfPublication <http://experiment.worldcat.org/entity/work/data/949933969#Place/st_andrews_n_b> ; # St. Andrews, N.B.
    library:placeOfPublication <http://id.loc.gov/vocabulary/countries/nkc> ;
    schema:about <http://dewey.info/class/333.95/a14/> ;
    schema:about <http://id.loc.gov/authorities/subjects/sh86002088> ; # Fishes--Effect of light on
    schema:about <http://id.worldcat.org/fast/820182> ; # Atlantic cod
    schema:about <http://experiment.worldcat.org/entity/work/data/949933969#Topic/morue_canada> ; # Morue--Canada
    schema:about <http://id.worldcat.org/fast/1204310> ; # Canada.
    schema:about <http://experiment.worldcat.org/entity/work/data/949933969#Topic/poissons_effets_de_la_lumiere_sur_les> ; # Poissons--Effets de la lumière sur les
    schema:about <http://id.worldcat.org/fast/926439> ; # Fishes--Effect of light on
    schema:about <http://experiment.worldcat.org/entity/work/data/949933969#Topic/atlantic_cod_canada> ; # Atlantic cod--Canada
    schema:bookFormat schema:EBook ;
    schema:contributor <http://viaf.org/viaf/138297883> ; # Canada. Department of Fisheries and Oceans. Biological Station (St. Andrews, N.B.)
    schema:contributor <http://experiment.worldcat.org/entity/work/data/949933969#Person/trippel_e_a_edward_alexander_1957> ; # Edward Alexander Trippel
    schema:datePublished "2011" ;
    schema:description "Mariculture of Atlantic cod (Gadus morhua) in the Bay of Fundy was initiated in the early 2000s and early maturation has been a persistent problem since its inception. The objectives of the present study were to evaluate, over separate two-year periods, whether 20 and 24 h light exposure compared to natural photoperiod in sea cages will (i) increase body growth, (ii) halt or delay sexual maturation, (iii) influence investment in reproductive tissue as reflected in gonad weight, and (iv) affect seasonal levels of water content in muscle and liver tissue of Atlantic cod. A positive growth response to extended daylength (20 and 24 h light) was observed, though these light treatments did not influence the incidence of sexual maturation of either sex. The greater light intensity used at the Fundy site (4.8 kHz) compared to Kelly Cove (1.6 kHz) also did not reduce incidence of maturity. Proportion of fish sampled that were mature was often>90%. Immature cod of each gender were reported to grow at slower rates than mature cod and this trend was consistent across all treatments and multiple years. Implementation of extended daylength did, however, result in delaying attainment of sexual maturation by 3 months. Of particular note is the lower reproductive investment (i.e., female GSI values) observed after two years of 20 h daily illumination. Water content of fillet muscle was surprisingly quite constant throughout the study with only minor variation. In the Fundy site, percent water content of muscle tissue of adult females commonly ranged from 78-83%, regardless of light treatment. Water content of muscle of immature females ranged from 80-83%. Spawning females occasionally exhibited the highest water content over other adult females (+5-10% at Kelly Cove; +2-3% at Fundy site). Hepatosomatic index was greatest during the winter/spring period and for pre-spawning fish. Investment in liver tissue was lowest for immature fish. Water content of liver tissue ranged from 25-50%. Our results suggest the use of extended daylength to improve growth and change the timing and investment in reproduction holds some promise for Atlantic cod mariculture. Light measurements verified the inability of artificial light to equal the much stronger ambient light cycle further indicating the difficulty in influencing fish physiological cycles compared to lab experiments with light tight lids."@en ;
    schema:exampleOfWork <http://worldcat.org/entity/work/id/949933969> ;
    schema:genre "Government publication"@en ;
    schema:genre "National government publication"@en ;
    schema:inLanguage "en" ;
    schema:isPartOf <http://experiment.worldcat.org/entity/work/data/949933969#Series/canadian_technical_report_of_fisheries_and_aquatic_sciences_online> ; # Canadian technical report of fisheries and aquatic sciences (Online) ;
    schema:isPartOf <http://experiment.worldcat.org/entity/work/data/949933969#Series/canadian_technical_report_of_fisheries_and_aquatic_sciences> ; # Canadian technical report of fisheries and aquatic sciences ;
    schema:isSimilarTo <http://www.worldcat.org/oclc/742363988> ;
    schema:name "Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages"@en ;
    schema:productID "794618755" ;
    schema:publication <http://www.worldcat.org/title/-/oclc/794618755#PublicationEvent/st_andrews_n_b_fisheries_and_oceans_canada_2011> ;
    schema:publisher <http://experiment.worldcat.org/entity/work/data/949933969#Agent/fisheries_and_oceans_canada> ; # Fisheries and Oceans Canada
    schema:url <http://publications.gc.ca/collections/collection_2012/mpo-dfo/Fs97-6-2925-eng.pdf> ;
    schema:url <http://catalog.hathitrust.org/api/volumes/oclc/742363988.html> ;
    schema:url <http://epe.lac-bac.gc.ca/100/201/301/weekly_checklist/2012/internet/w12-17-U-E.html/collections/collection_2012/mpo-dfo/Fs97-6-2925-eng.pdf> ;
    schema:url <http://www.dfo-mpo.gc.ca/Library/343736.pdf> ;
    schema:url <https://central.bac-lac.gc.ca/.item?id=Fs97-6-2925-eng&op=pdf&app=Library> ;
    wdrs:describedby <http://www.worldcat.org/title/-/oclc/794618755> ;
    .


Related Entities

<http://experiment.worldcat.org/entity/work/data/949933969#Agent/fisheries_and_oceans_canada> # Fisheries and Oceans Canada
    a bgn:Agent ;
    schema:name "Fisheries and Oceans Canada" ;
    .

<http://experiment.worldcat.org/entity/work/data/949933969#Person/trippel_e_a_edward_alexander_1957> # Edward Alexander Trippel
    a schema:Person ;
    schema:birthDate "1957" ;
    schema:familyName "Trippel" ;
    schema:givenName "Edward Alexander" ;
    schema:givenName "E. A." ;
    schema:name "Edward Alexander Trippel" ;
    .

<http://experiment.worldcat.org/entity/work/data/949933969#Place/st_andrews_n_b> # St. Andrews, N.B.
    a schema:Place ;
    schema:name "St. Andrews, N.B." ;
    .

<http://experiment.worldcat.org/entity/work/data/949933969#Series/canadian_technical_report_of_fisheries_and_aquatic_sciences> # Canadian technical report of fisheries and aquatic sciences ;
    a bgn:PublicationSeries ;
    schema:hasPart <http://www.worldcat.org/oclc/794618755> ; # Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages
    schema:name "Canadian technical report of fisheries and aquatic sciences ;" ;
    .

<http://experiment.worldcat.org/entity/work/data/949933969#Series/canadian_technical_report_of_fisheries_and_aquatic_sciences_online> # Canadian technical report of fisheries and aquatic sciences (Online) ;
    a bgn:PublicationSeries ;
    schema:hasPart <http://www.worldcat.org/oclc/794618755> ; # Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages
    schema:name "Canadian technical report of fisheries and aquatic sciences (Online) ;" ;
    .

<http://experiment.worldcat.org/entity/work/data/949933969#Topic/poissons_effets_de_la_lumiere_sur_les> # Poissons--Effets de la lumière sur les
    a schema:Intangible ;
    schema:name "Poissons--Effets de la lumière sur les"@fr ;
    .

<http://id.loc.gov/authorities/subjects/sh86002088> # Fishes--Effect of light on
    a schema:Intangible ;
    schema:name "Fishes--Effect of light on"@en ;
    .

<http://id.worldcat.org/fast/1204310> # Canada.
    a schema:Place ;
    schema:name "Canada." ;
    .

<http://id.worldcat.org/fast/820182> # Atlantic cod
    a schema:Intangible ;
    schema:name "Atlantic cod"@en ;
    .

<http://id.worldcat.org/fast/926439> # Fishes--Effect of light on
    a schema:Intangible ;
    schema:name "Fishes--Effect of light on"@en ;
    .

<http://viaf.org/viaf/138297883> # Canada. Department of Fisheries and Oceans. Biological Station (St. Andrews, N.B.)
    a schema:Organization ;
    schema:name "Canada. Department of Fisheries and Oceans. Biological Station (St. Andrews, N.B.)" ;
    .

<http://www.worldcat.org/oclc/742363988>
    a schema:CreativeWork ;
    rdfs:label "Effects of Extended Photoperiods and Light Intensities on Growth, Sexual Maturation and Tissue Water Content of Atlantic Cod (Gadus Morhua) in Sea Cages." ;
    schema:description "Print version:" ;
    schema:isSimilarTo <http://www.worldcat.org/oclc/794618755> ; # Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages
    .

<http://www.worldcat.org/title/-/oclc/794618755>
    a genont:InformationResource, genont:ContentTypeGenericResource ;
    schema:about <http://www.worldcat.org/oclc/794618755> ; # Effects of extended photoperiods and light intensities on growth, sexual maturation and tissue water content of Atlantic cod (Gadus morhua) in sea cages
    schema:dateModified "2018-04-23" ;
    void:inDataset <http://purl.oclc.org/dataset/WorldCat> ;
    .

<https://central.bac-lac.gc.ca/.item?id=Fs97-6-2925-eng&op=pdf&app=Library>
    rdfs:comment "For holdings see LAC's Electronic Collection." ;
    .


Content-negotiable representations

Close Window

Please sign in to WorldCat 

Don't have an account? You can easily create a free account.