First Evidence of Secondary Sexual Dimorphism in the Freshwater Fish Family Botiidae: A Newly Recognised Synapomorphy of Loaches (Cypriniformes: Cobitoidea)

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985904%3A_____%2F25%3A00644532" target="_blank" >RIV/67985904:_____/25:00644532 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2410-3888/10/12/648" target="_blank" >https://www.mdpi.com/2410-3888/10/12/648</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/fishes10120648" target="_blank" >10.3390/fishes10120648</a>

Result language

angličtina

Original language name

First Evidence of Secondary Sexual Dimorphism in the Freshwater Fish Family Botiidae: A Newly Recognised Synapomorphy of Loaches (Cypriniformes: Cobitoidea)

Original language description

Within the freshwater fish order Cypriniformes, loaches form a monophyletic lineage comprising nine families with more than 1400 species. Secondary sexual dimorphism is widespread among loach families, most notably in the form of enlarged pectoral fins and tubercles or other hard structures on the pectoral fin in adult males. To date, the family Botiidae, phylogenetically sister to all other loach families, was reported to lack such sexually dimorphic structures, leading to the hypothesis that the common ancestor of loaches did not exhibit sexual dimorphism. Here, we report the presence of sexual dimorphism in eight species of Botiidae: Leptobotia bellacauda, L. guilinensis, L. microphthalma, L. taeniops, L. tchangi, Parabotia fasciatus, Sinibotia pulchra, and S. robusta. In all species, adult males possess longer pectoral fins than females. Additionally, males of L. guilinensis and L. tchangi exhibit larger pelvic fins, while males of L. microphthalma have larger anal fins. In L. bellacauda, L. microphthalma, and L. tchangi, portions of the dorsal surface of the pectoral fin bear rows of tubercles. The three genera displaying sexual dimorphism belong to two different subfamilies, demonstrating that sexual dimorphism is widespread across Botiidae and not restricted to a single genus or subfamily. Our results show that sexual dimorphism is present in the most basal family of loaches, suggesting that it represents a synapomorphy of loach fishes.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10602 - Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Fishes

ISSN

2410-3888

e-ISSN

2410-3888

Volume of the periodical

10

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

16

Pages from-to

648

UT code for WoS article

001647276000001

EID of the result in the Scopus database

2-s2.0-105025750385