Feeding ecomorphologies in the fish genus Herichthys (Perciformes: Cichlidae) based on stomach content and lower pharyngeal jaw shape

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F19%3A43899333" target="_blank" >RIV/60076658:12310/19:43899333 - isvavai.cz</a>

Result on the web

<a href="https://www.researchgate.net/publication/333668772_Feeding_ecomorphologies_in_the_fish_genus_Herichthys_Perciformes_Cichlidae_based_on_stomach_content_and_lower_pharyngeal_jaw_shape" target="_blank" >https://www.researchgate.net/publication/333668772_Feeding_ecomorphologies_in_the_fish_genus_Herichthys_Perciformes_Cichlidae_based_on_stomach_content_and_lower_pharyngeal_jaw_shape</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Feeding ecomorphologies in the fish genus Herichthys (Perciformes: Cichlidae) based on stomach content and lower pharyngeal jaw shape

Original language description

Speciation is a multifactorial process with factors acting at different scales of space and time. Trophic niche segregation has promoted the diversification of cichlids fishes in lentic (lacustrine) environments, whether this is also the case in lotic (riverine) systems remains unknown. Herichthys is the genus of cichlids with the most boreal distribution in the Americas comprising 12 currently recognized species, most micro-endemic and only two with a wide distribution. In the present work, we analyzed the stomach content and lower pharyngeal jaw morphologies of the species of the genus to evaluate the possible role of feeding ecology in the diversification of the group. Trophic strategies varied widely, including omnivores, piscivores, invertivores, molluskivores, detritivores, herbivores and algivores. Low values of Pianka&apos;s index of niche overlap were found in the sympatric micro-endemic species, while in the widely distributed species the indices ranged from low to very high. The analysis of lower pharyngeal jaw morphologies allowed discriminating a shape associated with piscivorous species from other foraging groups. The results of this study suggest that trophic niche segregation is a factor that could promotes diversification within the genus Herichthys although additional studies need to be performed to fully understand the speciation process in this group of Neotropical cichlid fishes.

Czech name

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Czech description

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Type

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

CEP classification

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OECD FORD branch

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

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

Revista de Biología Tropical

ISSN

0034-7744

e-ISSN

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Volume of the periodical

67

Issue of the periodical within the volume

3

Country of publishing house

CR - COSTA RICA

Number of pages

11

Pages from-to

643-653

UT code for WoS article

000484818000023

EID of the result in the Scopus database

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