Results 51 to 60 of about 1,744 (163)

Unexpected trophic diversity in the endemic fish Orestias chungarensis in a high‐altitude freshwater ecosystem, Lake Chungará (4520 m), northern Chile

open access: yesJournal of Fish Biology, Volume 107, Issue 3, Page 837-850, September 2025.
Abstract Orestias chungarensis Vila & Pinto, 1986 is a small‐bodied (max fork length = 120 mm) cyprinodontiform fish with a very restricted global distribution. The species is limited to a single, small (283 km2), high‐altitude (4520 m) catchment located in the Altiplano of northern Chile. Until the late 20th century, O.
Karina González   +2 more
wiley   +1 more source

Historical biogeography of aplocheiloid killifishes (Teleostei: Cyprinodontiformes)

open access: yesVertebrate Zoology, 2013
Aplocheiloid killifishes, a diversified group of primary freshwater fishes occurring in tropical and subtropical regions of the Americas, Africa and south-eastern Asia, have been the focus of debates among biogeographers using dispersal and vicariance approaches.
openaire   +1 more source

Spatial Organization of Fish Assemblages and Its Relation to Environmental Factors in the Lower Yalong River, China

open access: yesEcology and Evolution, Volume 15, Issue 8, August 2025.
Obvious variations were found in fish assemblages depending on the stream order. There were three site groups, one covering the tributaries of the Anning River, one covering the Anning River, and one covering the lower Yalong River. From low‐ to high‐order rivers, the alterations of key species within the fish communities exhibited a turnover pattern ...
Huijun Ru   +5 more
wiley   +1 more source

Aphyosemion pamaense, a new killifish species (Cyprinodontiformes: Nothobranchiidae) from Cameroon.

open access: yesZootaxa, 2013
Aphyosemion panaense sp. nov. is described from the Pama River, a small tributary of the Nyong, in the surroundings of Pama, Cameroon. It belongs to the subgenus Chromaphyosenion Radda, 1971 and is distinguished from its relatives by a unique/diagnostic combination of characters: orange unpaired fins, an anal fin without spots, an orange throat and ...
/Agnèse, Jean-François   +3 more
openaire   +3 more sources

Low‐Effort eDNA Sampling Reveals Fish Community Patterns in a Neotropical River Basin

open access: yesEnvironmental DNA, Volume 7, Issue 4, July–August 2025.
Low eDNA sampling effort (< 10 sample sites) using a portable on‐site kit with syringe filters and a modest water volume (< 500 mL per site) provided a rapid and robust snapshot of fish biodiversity. Environmental DNA based species richness increases along the upstream‐downstream gradient showing a significant negative correlation with river elevation ...
Daniel Cardoso Carvalho   +4 more
wiley   +1 more source

Otolith‐based species identification in the killifish Aphaniops (Teleostei; Cyprinodontiformes; Aphaniidae) using both morphometry and wavelet analysis

open access: yesActa Zoologica, Volume 106, Issue 3, Page 291-308, July 2025.
Abstract The killifish genus Aphaniops consists of nine species distributed in Eastern Africa and the Middle East. However, distinguishing these species from each other based on morphological traits is challenging. Here we investigate the utility of otoliths (sagittae) in distinguishing between A. dispar, A. ginaonis, A. hormuzensis, A.
Eleni A. Charmpila   +2 more
wiley   +1 more source

Karyosystematics of Kol tooth-carp, Aphanius darabensis (Teleostei: Cyprinodontidae)

open access: yesInternational Journal of Aquatic Biology, 2016
The karyological and cytological characteristics of an endemic cyprinodont fish of Iran, Aphanius darabensis Esmaeili, Teimori, Gholami & Reichenbacher, 2014 have been investigated for the first time by examining metaphase chromosomes spreads obtained ...
Azam Mansoori   +3 more
doaj  

Ictiofauna dulceacuícola y estuarina de la cuenca del golfo de Paria, Venezuela: composición y relaciones biogeográficas con la cuenca del Orinoco

open access: yesBiota Colombiana, 2010
The Paria Gulf Basin ichthyofauna comprises 218 species arranged in 14 orders and 50 families. Among these, 155 species are considered strictly freshwater and 63 species are euryhaline.
Carlos A. Lasso   +2 more
doaj   +1 more source

Pseudobrânquia do guaru Poecilia reticulata (Peter, 1859): análise estrutural, morfométrica e histoquímica para detecção de glicoconjugados

open access: yesPesquisa Veterinária Brasileira, 2013
A morfologia, os parâmetros citomorfométricos e os glicoconjugados presentes na pseudobrânquia de guaru, Poecilia reticulata Peter, 1859 (Cyprinodontiformes: Poeciliidae), foram investigados por microscopia de luz acoplada ao sistema de captura e análise
Thiago L. Rocha   +2 more
doaj   +1 more source

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