Spawning energetics and otolith microchemistry provide insights into the stock structure of bonga shad Ethmalosa fimbriata
Julian Döring
Carola Wagner
Maik Tiedemann
Patrice Brehmer
Werner Ekau
Abstract
The gross energy content of spawning batches and the microchemistry of sagittal otoliths in individual female bonga shad Ethmalosa fimbriata were compared between contrasting sampling sites at the Senegalese southern coast and inside the hypersaline Sine Saloum Estuary. Results show that females spawning in the estuary's middle reaches invested almost three times more energy into reproduction (115 ± 65 J g−1 body mass) than their neritic counterparts (39 ± 34 J g−1 body mass). Also, female otolith levels of Ba:Ca, Sr:Ca and Zn:Ca either differed significantly between study sites or could be linked to heterogeneous environmental variables. A quadratic discriminant function analysis provided evidence of segregated spawning populations of E. fimbriata in southern Senegalese waters.
Döring J., Wagner C., Tiedemann M., Brehmer P. and Ekau W. (2018) Spawning energetics and otolith microchemistry provide insights into the stock structure of bonga shad Ethmalosa fimbriata. Journal of Fish Biology 94(2): 241-250. 10.1111/jfb.13881
@article{Döring2018,
Title = {Spawning energetics and otolith microchemistry provide insights into the stock structure of bonga shad Ethmalosa fimbriata},
Author = {Döring, Julian and Wagner, Carola and Tiedemann, Maik and Brehmer, Patrice and Ekau, Werner},
Editor = {},
Journal = {Journal of Fish Biology},
Year = {2018},
Pages = {241-250},
Volume = {94},
Doi = {10.1111/jfb.13881},
Abstract = {The gross energy content of spawning batches and the microchemistry of sagittal otoliths in individual female bonga shad Ethmalosa fimbriata were compared between contrasting sampling sites at the Senegalese southern coast and inside the hypersaline Sine Saloum Estuary. Results show that females spawning in the estuary's middle reaches invested almost three times more energy into reproduction (115 ± 65 J g−1 body mass) than their neritic counterparts (39 ± 34 J g−1 body mass). Also, female otolith levels of Ba:Ca, Sr:Ca and Zn:Ca either differed significantly between study sites or could be linked to heterogeneous environmental variables. A quadratic discriminant function analysis provided evidence of segregated spawning populations of E. fimbriata in southern Senegalese waters.},
}
TY - JOUR
AU - Döring, Julian
AU - Wagner, Carola
AU - Tiedemann, Maik
AU - Brehmer, Patrice
AU - Ekau, Werner
TI - Spawning energetics and otolith microchemistry provide insights into the stock structure of bonga shad Ethmalosa fimbriata
T2 - Journal of Fish Biology
PY - 2018
SP - 241-250
VL - 94
DO - 10.1111/jfb.13881
AB - The gross energy content of spawning batches and the microchemistry of sagittal otoliths in individual female bonga shad Ethmalosa fimbriata were compared between contrasting sampling sites at the Senegalese southern coast and inside the hypersaline Sine Saloum Estuary. Results show that females spawning in the estuary's middle reaches invested almost three times more energy into reproduction (115 ± 65 J g−1 body mass) than their neritic counterparts (39 ± 34 J g−1 body mass). Also, female otolith levels of Ba:Ca, Sr:Ca and Zn:Ca either differed significantly between study sites or could be linked to heterogeneous environmental variables. A quadratic discriminant function analysis provided evidence of segregated spawning populations of E. fimbriata in southern Senegalese waters.
ER -
