Seasonal dynamics of fecundity and recruitment of Temora longicornis in the Baltic Sea

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Standard

Seasonal dynamics of fecundity and recruitment of Temora longicornis in the Baltic Sea. / Dutz, J; van Beusekom, JEE; Hinrichs, R.

In: Marine Ecology - Progress Series Online, Vol. 462, 2012, p. 51-66.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Harvard

APA

CBE

MLA

Vancouver

Author

Dutz, J; van Beusekom, JEE; Hinrichs, R / Seasonal dynamics of fecundity and recruitment of Temora longicornis in the Baltic Sea.

In: Marine Ecology - Progress Series Online, Vol. 462, 2012, p. 51-66.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{a0e4ccc7e79548ffaa9903da1616d316,
title = "Seasonal dynamics of fecundity and recruitment of Temora longicornis in the Baltic Sea",
publisher = "Inter-Research",
author = "J Dutz and {van Beusekom}, JEE and R Hinrichs",
year = "2012",
doi = "10.3354/meps09830",
volume = "462",
pages = "51--66",
journal = "Marine Ecology - Progress Series Online",
issn = "1616-1599",

}

RIS

TY - JOUR

T1 - Seasonal dynamics of fecundity and recruitment of Temora longicornis in the Baltic Sea

A1 - Dutz,J

A1 - van Beusekom,JEE

A1 - Hinrichs,R

AU - Dutz,J

AU - van Beusekom,JEE

AU - Hinrichs,R

PB - Inter-Research

PY - 2012

Y1 - 2012

N2 - The seasonal cycle of reproduction in Temora longicornis was investigated in the Bornholm Basin, Baltic Sea, from March 2002 to May 2003. Variations in egg production of the population (EPR) and spawning females (sfEPR, ~ clutch size), proportion of spawning females (%FS), egg hatching success (HS), female prosome length (PL) and weight-specific egg production (spEPR) were compared with the seasonal variations in temperature, salinity, and food concentration and composition. Females reproduced year round with maxima of 9.8 to 12.3 eggs female−1 d−1 in spring and low to moderate egg production during the remaining seasons. PL was maximal during spring, and %FS, sfEPR and spEPR paralleled egg production. HS was low during winter and increased in spring. The statistical analyses showed that mean egg production correlated with both sfEPR and %FS. While %FS was significantly related to food concentration, sfEPR was dependent on both food availability and PL, which in turn was inversely related to temperature. Salinity had no effect on the seasonal variation in egg production because females maintained their vertical position in water with low seasonal amplitudes in salinity and temperature, presumably to avoid high energetic costs due to osmoregulation under fluctuating salinity. Nevertheless, the costs due to osmoregulation during development likely resulted in small female PL, and thus indirectly affected reproduction. Using empirical non-linear regression, 80% of the seasonal variation in egg production of T. longicornis was explained by female length and food concentration. However, despite the pronounced seasonal variation in egg production, the recruitment of nauplii was continuously high except throughout the productive season, indicating that a low reproductive success was offset by female abundance.

AB - The seasonal cycle of reproduction in Temora longicornis was investigated in the Bornholm Basin, Baltic Sea, from March 2002 to May 2003. Variations in egg production of the population (EPR) and spawning females (sfEPR, ~ clutch size), proportion of spawning females (%FS), egg hatching success (HS), female prosome length (PL) and weight-specific egg production (spEPR) were compared with the seasonal variations in temperature, salinity, and food concentration and composition. Females reproduced year round with maxima of 9.8 to 12.3 eggs female−1 d−1 in spring and low to moderate egg production during the remaining seasons. PL was maximal during spring, and %FS, sfEPR and spEPR paralleled egg production. HS was low during winter and increased in spring. The statistical analyses showed that mean egg production correlated with both sfEPR and %FS. While %FS was significantly related to food concentration, sfEPR was dependent on both food availability and PL, which in turn was inversely related to temperature. Salinity had no effect on the seasonal variation in egg production because females maintained their vertical position in water with low seasonal amplitudes in salinity and temperature, presumably to avoid high energetic costs due to osmoregulation under fluctuating salinity. Nevertheless, the costs due to osmoregulation during development likely resulted in small female PL, and thus indirectly affected reproduction. Using empirical non-linear regression, 80% of the seasonal variation in egg production of T. longicornis was explained by female length and food concentration. However, despite the pronounced seasonal variation in egg production, the recruitment of nauplii was continuously high except throughout the productive season, indicating that a low reproductive success was offset by female abundance.

U2 - 10.3354/meps09830

DO - 10.3354/meps09830

JO - Marine Ecology - Progress Series Online

JF - Marine Ecology - Progress Series Online

SN - 1616-1599

VL - 462

SP - 51

EP - 66

ER -