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

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

U2 - 10.1111/j.1365-2400.2010.00755.x

DO - 10.1111/j.1365-2400.2010.00755.x

M3 - Journal article

VL - 17

SP - 554

EP - 560

JO - Fisheries Management and Ecology

JF - Fisheries Management and Ecology

SN - 0969-997X

IS - 6

ER -