Results 41 to 50 of about 4,488 (220)

The Effects of Diet on the Expression of Male Dimorphic Colouration and Weaponry in a Species of Neotropical Katydid

Ecology and Evolution, Volume 15, Issue 12, December 2025.
Male alternative reproductive tactics are widespread, often involving distinct morphs influenced by genetics or the environment. This study confirms two male morphs in the bush cricket Satizabalus jorgevargasi—larger, more colourful majors and smaller, duller minors—and tests how diet affects their development.
Lewis B. Holmes, Carl D. Soulsbury, Fernando Montealegre‐Z   +2 more
wiley   +1 more source

Parasitic diversity of a wild Satanoperca jurupari population, an ornamental cichlid in the Brazilian Amazon [PDF]

Acta Amazonica, 2017
Assessment of biodiversity is fundamental for the understanding of ecological interactions, but fish parasites were neglected in biodiversity estimates for a long time.
Marcos TAVARES-DIAS, Marcos Sidney Brito OLIVEIRA, Raissa Alves GONÇALVES, Lígia Rigor NEVES   +3 more
doaj   +1 more source

Potential mechanism of sound production in Oreochromis niloticus(Cichlidae) [PDF]

Journal of Experimental Biology, 2009
SUMMARY Although acoustic communication is an integral part of cichlid behaviour,its mechanism has never been identified before. In the present study, a combination of approaches was used to investigate the sound-producing mechanism of Oreochromis niloticus. Synchronisation of high-speed video data (500 frames s–1) and cineradiographies (
Nicolas, Longrie, Sam, Van Wassenbergh, Pierre, Vandewalle, Quentin, Mauguit, Eric, Parmentier   +4 more
openaire   +3 more sources

Vertical and temporal niche partitioning in Amazonian butterflies: implications for the evolution of thermal tolerance

Oikos, Volume 2025, Issue 12, December 2025.
Closely related species living in sympatry are often partitioned into divergent ecological niches. Such specialization can be enabled by the evolution of divergent traits enhancing adaptation to different niches. In this study, we investigate the partitioning of closely related butterfly species into different forest strata and daily activity time and ...
Titouan Bouinier, Charline Smadi, Violaine Llaurens   +2 more
wiley   +1 more source

Incidences of taillessness in Acanthopagrus arabicus and Oreochromis niloticus collected from the Shatt al-Arab River, Basrah, Iraq

Fisheries & Aquatic Life
Taillessness (the absence of the caudal fin and some of the caudal peduncle) is described in Acanthopagrus arabicus Iwatsuki and Oreochromis niloticus (L.) specimens collected from the Shatt al-Arab River, Basrah, Iraq.
Abed Jassim M., Jawad Laith A., Ankush Mujtaba A.   +2 more
doaj   +1 more source

The influence of salinity increasing on the fish communities in the east of Al-Hammar marsh- southern Iraq

المجلة العراقية للاستزراع المائي, 2019
The study included the effect of the advancement of the saline front on the composition of the fish catchment of the East Hamar marsh for the period from January 2018 to December 2018.
Ghassan, A. Al-Najjar
doaj   +1 more source

The ichthyofauna in the influence area of the Lajeado reservoir, Tocantins state, Brazil [PDF]

Check List, 2017
Five rivers and 13 streams in the influence area of the Lajeado reservoir (upper-middle Tocantins River) were sampled in 5 expeditions. A total of 194 fish species were recorded and with the Characiformes and Siluriformes predominant, following the ...
Renata Bartolette, Carolina Vieira, amille Santos, Carlos Santos, Jefferson Luduvice, Tamires Passos, Thiago D’avilla, Bruna Nascimento, Dário Ernesto, Fernando Argolo, Alexandre Aguiar, Fernanda Argolo, Marlene Pereira, Tainara Santos, Marcelo Brito   +14 more
doaj   +3 more sources

A new species of Gymnogeophagus from the río Negro and río Tacuarí basins, Uruguay (Teleostei: Perciformes)

Neotropical Ichthyology
The new cichlid species Gymnogeophagus tiraparae is described from the río Negro and río Tacuarí basins (Uruguay). The new species is distinguished from other Gymnogeophagus species by the unique presence of the following characters: adipose hump on head
Iván González-Bergonzoni, Marcelo Loureiro, Sebastián Oviedo   +2 more
doaj   +1 more source

Ecto- and endo-parasitic monogeneans (Platyhelminthes) on cultured freshwater exotic fish species in the state of Morelos, South-Central Mexico

ZooKeys, 2018
An extensive parasitological study of 365 freshwater exotic fish specimens belonging to 13 species of seven families (Cichlidae, Cyprinidae, Osphronemidae, Pangasidae, Poeciliidae, Characidae, and Loricariidae) collected from 31 Aquaculture Production ...
Edgar F. Mendoza-Franco, Juan Manuel Caspeta-Mandujano, Marina Tapia Osorio   +2 more
doaj   +3 more sources

A Baseline of Fish Species Richness Through eDNA Metabarcoding in an Understudied Tropical Mangrove Coast of Java, Indonesia

Environmental DNA, Volume 7, Issue 6, November–December 2025.
This study demonstrates the use of environmental DNA metabarcoding of fish in a highly diverse but poorly described tropical mangrove ecosystem along the North coast of Java, Indonesia. Our results indicate eDNA metabarcoding can capture temporal differences and provide a baseline for fish diversity for future (eDNA metabarcoding) biodiversity studies ...
Lara Jansen, Eline Loos, Restiana Wisnu Ariyati, Lestari L. Widowati, Sri Rejeki, Adolphe O. Debrot, Reindert Nijland   +6 more
wiley   +1 more source