TY - JOUR

T1 - A novel length back-calculation approach accounting for ontogenetic changes in the fish length - otolith size relationship during the early life of sprat (Sprattus sprattus)

A1 - Guenther,Claudia C.

A1 - Temming,Axel

A1 - Baumann,Hannes

A1 - Huwer,Bastian

A1 - Moellmann,Christian

A1 - Clemmesen,Catriona

A1 - Herrmann,Jens-Peter

AU - Guenther,Claudia C.

AU - Temming,Axel

AU - Baumann,Hannes

AU - Huwer,Bastian

AU - Moellmann,Christian

AU - Clemmesen,Catriona

AU - Herrmann,Jens-Peter

PB - N R C Research Press

PY - 2012

Y1 - 2012

N2 - An individual-based length back-calculation method was developed for juvenile Baltic sprat (Sprattus sprattus), accounting for ontogenetic changes in the relationship between fish length and otolith length. In sprat, metamorphosis from larvae to juveniles is characterized by the coincidence of low length growth, strong growth in body height, and maximal otolith growth. Consequently, the method identifies a point of metamorphosis for an individual as the otolith radius at maximum increment widths. By incorporating this information in our back-calculation method, estimated length growth for the early larval stage was more than 60% higher compared with the result of the biological intercept model. After minimal length growth during metamorphosis, we found the highest increase in length during the early juvenile stage. We thus located the strongest growth potential in the early juvenile stage, which is supposed to be critical in determining recruitment strength in Baltic sprat.

AB - An individual-based length back-calculation method was developed for juvenile Baltic sprat (Sprattus sprattus), accounting for ontogenetic changes in the relationship between fish length and otolith length. In sprat, metamorphosis from larvae to juveniles is characterized by the coincidence of low length growth, strong growth in body height, and maximal otolith growth. Consequently, the method identifies a point of metamorphosis for an individual as the otolith radius at maximum increment widths. By incorporating this information in our back-calculation method, estimated length growth for the early larval stage was more than 60% higher compared with the result of the biological intercept model. After minimal length growth during metamorphosis, we found the highest increase in length during the early juvenile stage. We thus located the strongest growth potential in the early juvenile stage, which is supposed to be critical in determining recruitment strength in Baltic sprat.

KW - cellular growth

KW - metamorphosis

KW - ontogenetic change

KW - Pisces Vertebrata Chordata Animalia (Animals, Chordates, Fish, Nonhuman Vertebrates, Vertebrates) - Osteichthyes [85206] Sprattus sprattus species Baltic sprat common larva, immature

KW - 04500, Mathematical biology and statistical methods

KW - 10515, Biophysics - Biocybernetics

KW - 20004, Sense organs - Physiology and biochemistry

KW - 25502, Development and Embryology - General and descriptive

KW - Computational Biology

KW - Sensory Reception

KW - otolith sensory system

KW - back-calculation model mathematical and computer techniques

KW - biological intercept model mathematical and computer techniques

KW - Development

KW - Models and Simulations

KW - Sense Organs

UR - http://www.nrcresearchpress.com.globalproxy.cvt.dk/doi/pdf/10.1139/f2012-054

U2 - 10.1139/F2012-054

DO - 10.1139/F2012-054

JO - Canadian Journal of Fisheries and Aquatic Sciences

JF - Canadian Journal of Fisheries and Aquatic Sciences

SN - 0706-652X

IS - 7

VL - 69

SP - 1214

EP - 1229

ER -