Results 1 to 10 of about 197 (102)

Alarm cue induces an antipredator morphological defense in juvenile Nicaragua cichlids Hypsophrys nicaraguensis

open access: goldCurrent Zoology, 2010
Olfactory cues that indicate predation risk elicit a number of defensive behaviors in fishes, but whether they are sufficient to also induce morphological defenses has received little attention. Cichlids are characterized by a high level of morphological
Maria E. ABATE, Andrew G. ENG, Les KAUFMAN
doaj   +5 more sources

In search of new brain biomarkers of stress [PDF]

open access: yesResearch Results in Pharmacology, 2021
The aim: of the study was to investigate the level of ghrelin in various brain structures during a stress response in Zebrafish to a predator, to evaluate this indicator as a potential biomarker of stress, and the effect of a benzodiazepine tranquilizer (
Petr D. Shabanov   +4 more
doaj   +7 more sources

Morphology and efficiency of a specialized foraging behavior, sediment sifting, in neotropical cichlid fishes. [PDF]

open access: yesPLoS ONE, 2014
Understanding of relationships between morphology and ecological performance can help to reveal how natural selection drives biological diversification.
Hernán López-Fernández   +5 more
doaj   +2 more sources

Similarities in biological processes can be used to bridge ecology and molecular biology. [PDF]

open access: yesEvol Appl, 2020
Abstract Much of the research in biology aims to understand the origin of diversity. Naturally, ecological diversity was the first object of study, but we now have the necessary tools to probe diversity at molecular scales. The inherent differences in how we study diversity at different scales caused the disciplines of biology to be organized around ...
Hallin J   +6 more
europepmc   +2 more sources

Larval development of Hypsophrys nicaraguensis (Pisces: Cichlidae) under laboratory conditions

open access: diamondRevista de Biología Tropical, 2010
The cichlid Hypsophrys nicaraguensis is a popular fish known as butterfly, and despite its widespread use as pets, little is known about its reproductive biology. In order to contribute to this knowledge, the study describes the relevant larval development characteristics, from adult and larval cultures in captivity.
Alex Molina Arias
openalex   +8 more sources

Relationships of the New World cichlid genus Hypsophrys Agassiz 1859 (Teleostei: Cichlidae), with diagnoses for the genus and its species

open access: greenZootaxa, 2007
Two monotypic Neotropical cichlid genera, Hypsophrys Agassiz 1859 and Neetroplus Günther 1867, are well known but poorly diagnosed. The possession of a single supraneural (versus two for most Middle American species), a strongly rounded snout with a small and slightly subterminal mouth (versus straight snout profiles with terminal mouth) provide ...
Prosanta Chakrabarty, John S. Sparks
  +4 more sources

Ecological and evolutionary consequences of selective interspecific information use [PDF]

open access: yesEcology Letters, Volume 26, Issue 4, Page 490-503, April 2023., 2023
Recent work has shown that animals frequently use social information from individuals of their own species as well as of other species, yet the consequences of social information use remain poorly understood. Furthermore, information users may be selective in their social information use, deciding from whom and how to use information, but this has been
Reetta Hämäläinen   +5 more
wiley   +4 more sources

Diversity in visual sensitivity across Neotropical cichlid fishes via differential expression and intraretinal variation of opsin genes

open access: yesMolecular Ecology, Volume 30, Issue 8, Page 1880-1891, April 2021., 2021
Abstract The visual system of vertebrates has greatly contributed to our understanding of how different molecular mechanisms shape adaptive phenotypic diversity. Extensive work on African cichlid fishes has shown how variation in opsin gene expression mediates diversification as well as convergent evolution in colour vision.
Julián Torres‐Dowdall   +3 more
wiley   +1 more source

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