TY  - JOUR
A1  - Korniienko, Yevheniia
A1  - Nguyen, Linh
A1  - Baumgartner, Stephanie
A1  - Vater, Marianne
A1  - Tiedemann, Ralph
A1  - Kirschbaum, Frank
T1  - Intragenus F1-hybrids of African weakly electric fish (Mormyridae: Campylomormyrus tamandua male x C. compressirostris female) are fertile
JF  - Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology
N2  - Hybridization is widespread in fish and constitutes an important mechanism in fish speciation. There is, however, little knowledge about hybridization in mormyrids. F1-interspecies hybrids betweenCampylomormyrus tamandua male x C. compressirostris female were investigated concerning: (1) fertility; (2) survival of F2-fish and (3) new gene combinations in the F2-generation concerning the structure of the electric organ and features of the electric organ discharge. These F1-hybrids achieved sexual maturity at about 12-13.5 cm total length. A breeding group comprising six males and 13 females spawned 28 times naturally proving these F1-fish to be fertile. On average 228 eggs were spawned, the average fertilization rate was 47.8%. Eggs started to hatch 70-72 h after fertilization, average hatching rate was 95.6%. Average mortality rate during embryonic development amounted to 2.3%. Average malformation rate during the free embryonic stage was 27.7%. Exogenous feeding started on day 11. In total, we raised 353 normally developed larvae all of which died consecutively, the oldest specimen reaching an age of 5 months. During survival, the activities of the larval and adult electric organs were recorded and the structure of the adult electric organ was investigated histologically.
KW  - mormyridae
KW  - campylomormyrus
KW  - F1-hybrids
KW  - F2-hybrids
KW  - fertility
Y1  - 2020
U6  - https://doi.org/10.1007/s00359-020-01425-7
SN  - 0340-7594
SN  - 1432-1351
VL  - 206
IS  - 4
SP  - 571
EP  - 585
PB  - Springer
CY  - Heidelberg
ER  -