J 2024

Oogenesis, spermatogenesis and spermiation structures in Lake Tanganyika Synodontis species (Mochokidae, Telostei: Siluriformes)

DYKOVÁ, Iva, Jakub ŽÁK, Radim BLAŽEK, Holger ZIMMERMANN, Matej POLAČIK et. al.

Basic information

Original name

Oogenesis, spermatogenesis and spermiation structures in Lake Tanganyika Synodontis species (Mochokidae, Telostei: Siluriformes)

Authors

DYKOVÁ, Iva (203 Czech Republic, guarantor, belonging to the institution), Jakub ŽÁK (203 Czech Republic, belonging to the institution), Radim BLAŽEK (203 Czech Republic, belonging to the institution), Holger ZIMMERMANN, Matej POLAČIK, Veronika BARTÁKOVÁ and Martin REICHARD (203 Czech Republic, belonging to the institution)

Edition

Journal of Vertebrate Biology, Institute of Vertebrate Biology, Czech Academy of Sciences, 2024, 2694-7684

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10613 Zoology

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 1.500 in 2022

Organization unit

Faculty of Science

DOI

UT WoS

001209054100001

Keywords in English

cuckoo catfish; gonad histology; ovaries; testes

Tags

Tags

International impact, Reviewed
Změněno: 24/5/2024 08:41, Mgr. Marie Šípková, DiS.

Abstract

V originále

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.