High salinity tolerance in eggs and fry of a brackish Esox lucius population

Anders T Jørgensen, Benni Winding Hansen, L Jacobsen, C Skov, S Berg, D Bekkevold

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Knowledge on the biology and physiology of pike, Esox lucius L., populations inhabiting saline environments is scarce. An experimental setup was used to examine egg development and fry behaviour and growth under varying salinity levels in a brackish-water pike population from the western Baltic Sea. Eggs and fry developed at 8.5 psu, which is higher than hitherto reported for other populations. Fry exhibited stress behaviour and reduced growth when subjected to salinities above 13 psu. This indicates that early life stages of E. lucius tolerate ambient salinity conditions equivalent to the natural environment in its nursery area in the Stege Nor lagoon. The population should therefore not be dependent on access to freshwater environments during spawning. However, the results also suggest that the population’s natural environment is on the margin of its physiological capacity. The results have significance for management of brackish-water E. lucius populations, e.g. in relation to stocking strategies
OriginalsprogEngelsk
TidsskriftFisheries Management and Ecology
Vol/bind17
Udgave nummer6
Sider (fra-til)554-560
ISSN0969-997X
DOI
StatusUdgivet - 2010

Emneord

    Citer dette

    Jørgensen, Anders T ; Hansen, Benni Winding ; Jacobsen, L ; Skov, C ; Berg, S ; Bekkevold, D. / High salinity tolerance in eggs and fry of a brackish Esox lucius population. I: Fisheries Management and Ecology. 2010 ; Bind 17, Nr. 6. s. 554-560.
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    title = "High salinity tolerance in eggs and fry of a brackish Esox lucius population",
    abstract = "Knowledge on the biology and physiology of pike, Esox lucius L., populations inhabiting saline environments is scarce. An experimental setup was used to examine egg development and fry behaviour and growth under varying salinity levels in a brackish-water pike population from the western Baltic Sea. Eggs and fry developed at 8.5 psu, which is higher than hitherto reported for other populations. Fry exhibited stress behaviour and reduced growth when subjected to salinities above 13 psu. This indicates that early life stages of E. lucius tolerate ambient salinity conditions equivalent to the natural environment in its nursery area in the Stege Nor lagoon. The population should therefore not be dependent on access to freshwater environments during spawning. However, the results also suggest that the population’s natural environment is on the margin of its physiological capacity. The results have significance for management of brackish-water E. lucius populations, e.g. in relation to stocking strategies",
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    High salinity tolerance in eggs and fry of a brackish Esox lucius population. / Jørgensen, Anders T; Hansen, Benni Winding; Jacobsen, L; Skov, C; Berg, S; Bekkevold, D.

    I: Fisheries Management and Ecology, Bind 17, Nr. 6, 2010, s. 554-560.

    Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

    TY - JOUR

    T1 - High salinity tolerance in eggs and fry of a brackish Esox lucius population

    AU - Jørgensen, Anders T

    AU - Hansen, Benni Winding

    AU - Jacobsen, L

    AU - Skov, C

    AU - Berg, S

    AU - Bekkevold, D

    PY - 2010

    Y1 - 2010

    N2 - Knowledge on the biology and physiology of pike, Esox lucius L., populations inhabiting saline environments is scarce. An experimental setup was used to examine egg development and fry behaviour and growth under varying salinity levels in a brackish-water pike population from the western Baltic Sea. Eggs and fry developed at 8.5 psu, which is higher than hitherto reported for other populations. Fry exhibited stress behaviour and reduced growth when subjected to salinities above 13 psu. This indicates that early life stages of E. lucius tolerate ambient salinity conditions equivalent to the natural environment in its nursery area in the Stege Nor lagoon. The population should therefore not be dependent on access to freshwater environments during spawning. However, the results also suggest that the population’s natural environment is on the margin of its physiological capacity. The results have significance for management of brackish-water E. lucius populations, e.g. in relation to stocking strategies

    AB - Knowledge on the biology and physiology of pike, Esox lucius L., populations inhabiting saline environments is scarce. An experimental setup was used to examine egg development and fry behaviour and growth under varying salinity levels in a brackish-water pike population from the western Baltic Sea. Eggs and fry developed at 8.5 psu, which is higher than hitherto reported for other populations. Fry exhibited stress behaviour and reduced growth when subjected to salinities above 13 psu. This indicates that early life stages of E. lucius tolerate ambient salinity conditions equivalent to the natural environment in its nursery area in the Stege Nor lagoon. The population should therefore not be dependent on access to freshwater environments during spawning. However, the results also suggest that the population’s natural environment is on the margin of its physiological capacity. The results have significance for management of brackish-water E. lucius populations, e.g. in relation to stocking strategies

    KW - Baltic Sea

    KW - embryo development

    KW - local adaptation

    KW - pike

    KW - salinity stress

    KW - stenohaline fish

    KW - stocking

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