Life history trait variation of Greenland lumpfish (Cyclopterus lumpus) along a 1600 km latitudinal gradient

Rasmus Berg Hedeholm, Søren Post, Peter Grønkjær

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Lumpfish (Cyclopterus lumpus) is a highly commercial semi-pelagic fish found throughout the North Atlantic. In West Greenland, lumpfish are distributed along
a 1600 km continuous north–south gradient, and is an ideal candidate for studying the effects of latitude and environment on key life history traits (LHT). We describe the spatial variation in length-weight relationships, size-at-age
and age-at-maturity in pre-spawning adult males and females in six areas from south (60.7N, area 1) to north (72.8N, area 6) and estimate the reproductive output of females as a product of fecundity and individual egg energy content. All the studied LHT varied significantly among areas. The average age of both sexes was approximately three years in the areas 1–3 and gradually increased
to approximately four years in area 6. Fecundity and individual egg energy content increased from area 2 to area 5 and then decreased in area 6. Consequently, the relative reproductive output (kJ gonad/kg fish) ranged from
1.21 ± 0.38 in area 6 to 2.53 ± 0.84 in area 5. These spatial differences are hypothetically explained by variations in secondary production and temperature
Original languageEnglish
JournalPolar Biology
Pages (from-to)1-10
ISSN0722-4060
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Energy allocation
  • Habitat suitability
  • Latitudinal gradient
  • Lumpsucker
  • Reproductive output

Cite this

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title = "Life history trait variation of Greenland lumpfish (Cyclopterus lumpus) along a 1600 km latitudinal gradient",
abstract = "Lumpfish (Cyclopterus lumpus) is a highly commercial semi-pelagic fish found throughout the North Atlantic. In West Greenland, lumpfish are distributed alonga 1600 km continuous north–south gradient, and is an ideal candidate for studying the effects of latitude and environment on key life history traits (LHT). We describe the spatial variation in length-weight relationships, size-at-ageand age-at-maturity in pre-spawning adult males and females in six areas from south (60.7N, area 1) to north (72.8N, area 6) and estimate the reproductive output of females as a product of fecundity and individual egg energy content. All the studied LHT varied significantly among areas. The average age of both sexes was approximately three years in the areas 1–3 and gradually increasedto approximately four years in area 6. Fecundity and individual egg energy content increased from area 2 to area 5 and then decreased in area 6. Consequently, the relative reproductive output (kJ gonad/kg fish) ranged from1.21 ± 0.38 in area 6 to 2.53 ± 0.84 in area 5. These spatial differences are hypothetically explained by variations in secondary production and temperature",
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Life history trait variation of Greenland lumpfish (Cyclopterus lumpus) along a 1600 km latitudinal gradient. / Hedeholm, Rasmus Berg; Post, Søren; Grønkjær, Peter.

In: Polar Biology, 2017, p. 1-10.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Life history trait variation of Greenland lumpfish (Cyclopterus lumpus) along a 1600 km latitudinal gradient

AU - Hedeholm, Rasmus Berg

AU - Post, Søren

AU - Grønkjær, Peter

PY - 2017

Y1 - 2017

N2 - Lumpfish (Cyclopterus lumpus) is a highly commercial semi-pelagic fish found throughout the North Atlantic. In West Greenland, lumpfish are distributed alonga 1600 km continuous north–south gradient, and is an ideal candidate for studying the effects of latitude and environment on key life history traits (LHT). We describe the spatial variation in length-weight relationships, size-at-ageand age-at-maturity in pre-spawning adult males and females in six areas from south (60.7N, area 1) to north (72.8N, area 6) and estimate the reproductive output of females as a product of fecundity and individual egg energy content. All the studied LHT varied significantly among areas. The average age of both sexes was approximately three years in the areas 1–3 and gradually increasedto approximately four years in area 6. Fecundity and individual egg energy content increased from area 2 to area 5 and then decreased in area 6. Consequently, the relative reproductive output (kJ gonad/kg fish) ranged from1.21 ± 0.38 in area 6 to 2.53 ± 0.84 in area 5. These spatial differences are hypothetically explained by variations in secondary production and temperature

AB - Lumpfish (Cyclopterus lumpus) is a highly commercial semi-pelagic fish found throughout the North Atlantic. In West Greenland, lumpfish are distributed alonga 1600 km continuous north–south gradient, and is an ideal candidate for studying the effects of latitude and environment on key life history traits (LHT). We describe the spatial variation in length-weight relationships, size-at-ageand age-at-maturity in pre-spawning adult males and females in six areas from south (60.7N, area 1) to north (72.8N, area 6) and estimate the reproductive output of females as a product of fecundity and individual egg energy content. All the studied LHT varied significantly among areas. The average age of both sexes was approximately three years in the areas 1–3 and gradually increasedto approximately four years in area 6. Fecundity and individual egg energy content increased from area 2 to area 5 and then decreased in area 6. Consequently, the relative reproductive output (kJ gonad/kg fish) ranged from1.21 ± 0.38 in area 6 to 2.53 ± 0.84 in area 5. These spatial differences are hypothetically explained by variations in secondary production and temperature

KW - Energy allocation

KW - Habitat suitability

KW - Latitudinal gradient

KW - Lumpsucker

KW - Reproductive output

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DO - 10.1007/s00300-017-2160-x

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