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@article{2402200,
author = {Dyková, Iva and Žák, Jakub and Blažek, Radim and Zimmermann, Holger and Polačik, Matej and Bartáková, Veronika and Reichard, Martin},
article_number = {24023},
doi = {http://dx.doi.org/10.25225/jvb.24023},
keywords = {cuckoo catfish; gonad histology; ovaries; testes},
language = {eng},
issn = {2694-7684},
journal = {Journal of Vertebrate Biology},
title = {Oogenesis, spermatogenesis and spermiation structures in Lake Tanganyika Synodontis species (Mochokidae, Telostei: Siluriformes)},
url = {https://doi.org/10.25225/jvb.24023},
volume = {73},
year = {2024}
}
TY - JOUR
ID - 2402200
AU - Dyková, Iva - Žák, Jakub - Blažek, Radim - Zimmermann, Holger - Polačik, Matej - Bartáková, Veronika - Reichard, Martin
PY - 2024
TI - Oogenesis, spermatogenesis and spermiation structures in Lake Tanganyika Synodontis species (Mochokidae, Telostei: Siluriformes)
JF - Journal of Vertebrate Biology
VL - 73
IS - 24023
SP - 1-32
EP - 1-32
PB - Institute of Vertebrate Biology, Czech Academy of Sciences
SN - 26947684
KW - cuckoo catfish
KW - gonad histology
KW - ovaries
KW - testes
UR - https://doi.org/10.25225/jvb.24023
N2 - Synodontis catfishes in Lake Tanganyika have undergone a modest radiation, with differences among species in reproductive strategies, including one species that has evolved to be an obligate brood parasite. Here, we provide insights into the reproductive traits and histology of male and female reproductive organs of five Lake Tanganyika Synodontis species (S. irsacae, S. melanostictus, S. multipunctatus, S. petricola and S. polli). We describe the structures employed in oogenesis, spermiogenesis and spermiation. We show that the shape and size of the urogenital papilla is a valuable trait for sex determination in all species except S. polli, where the imprecision reached > 20 %. From a histological perspective, the inter-specific structural differences associated with the type of reproductive strategy were not found in the ovaries. However, testicular histology indicated variations in spermiation structures among species, namely in S. multipunctatus and S. irsacae. The differences identified may be related to variation in reproductive strategies among species. In particular, weaker eosinophily of testicular secretions was found in S. multipunctatus than in other species, suggesting the possibility of a different composition. Experimental manipulation of environmental and hormonal stimuli represents a promising direction for further research into the structural and functional diversity of male gonads in Synodontis species from Lake Tanganyika.
ER -
DYKOVÁ, Iva, Jakub ŽÁK, Radim BLAŽEK, Holger ZIMMERMANN, Matej POLAČIK, Veronika BARTÁKOVÁ and Martin REICHARD. Oogenesis, spermatogenesis and spermiation structures in Lake Tanganyika Synodontis species (Mochokidae, Telostei: Siluriformes). \textit{Journal of Vertebrate Biology}. Institute of Vertebrate Biology, Czech Academy of Sciences, 2024, vol.~73, No~24023, p.~1-32. ISSN~2694-7684. Available from: https://dx.doi.org/10.25225/jvb.24023.
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