Results 41 to 50 of about 5,773 (139)

The Effect of Familiarity Among Social Partners on the Jumping Behavior of Amazon Mollies

Ethology, EarlyView.
Pairs of familiar or nonfamiliar clonal Amazon mollies were tested in individual bowls, from which they could only escape from by jumping. Familiar pairs remained together significantly more than non‐familiar ones. Other behavioral aspects, such as timing and direction of jumps was not affected by familiarity.
Fritz A. Francisco, Ayla L. Kesim, David Bierbach   +2 more
wiley   +1 more source

Sex group composition, social interaction, and metabolism in the fish Nile tilapia

Brazilian Journal of Biology
We tested whether the fish Nile tilapia (Oreochromis niloticus) in a monosex male group spends more energy and displays an agonistic profile, differently from males in male-female groups.
TB. Carvalho, E. Gonçalves-de-Freitas
doaj   +1 more source

Behavioural Diversity of Fishes: Concepts, Drivers and Its Role in Conservation and Management

Fish and Fisheries, EarlyView.
ABSTRACT Human activity has altered nearly all ecosystems on Earth, contributing to substantial biodiversity loss across taxonomic, genetic and functional dimensions, from the intraspecific to the ecosystem scale. Yet some components of biodiversity remain hidden or underappreciated, including behavioural diversity.
Marie Prchalová, Robert Arlinghaus, Samuel Westrelin, Ivan Jarić, Michael G. Bertram, Josep Alós, Henrik Baktoft, Jack A. Brand, Tomas Brodin, Adolfo Cordero‐Rivera, Carlina Feldmann, Ryo Futamura, Stefan Hont, Pascal Klamser, Cecilie Iden Nilsen, Johann Mourier, Karl Øystein Gjelland, Esben Moland Olsen, Polona Pengal, Rubén Rabaneda‐Bueno, Milan Říha, Theresa Rueger, Holger Schielzeth, Marco Signaroli, Marija Smederevac‐Lalić, Christopher T. Monk   +25 more
wiley   +1 more source

Age, growth and sexual dimorphism of the monkeyface prickleback (Cebidichthys violaceus)

Journal of Fish Biology, EarlyView.
Abstract Accurate estimates of age, growth and maturation are fundamental to fisheries assessment, conservation and the development of emerging aquaculture species. However, life‐history parameters can vary within species and may be influenced by factors such as sexual dimorphism, which is often poorly quantified in non‐commercial or understudied ...
Kevin D. Hinterman, Matthew R. Hoehn, Luke D. Gardner, Scott L. Hamilton   +3 more
wiley   +1 more source

Spot the difference: Turbidity‐driven plasticity and variation in spotted grunter (Pomadasys commersonnii) spot patterns

Journal of Fish Biology, EarlyView.
Abstract Animal body markings such as spots, stripes and patterns play important roles in camouflage and visual communication. This study investigated phenotypic plasticity in the spot patterns of spotted grunter Pomadasys commersonnii, an estuarine‐dependent haemulid species.
Vivienne Coetzee, Denham Parker, Stephen Lamberth, Sven Kerwath   +3 more
wiley   +1 more source

Social context shapes acoustic signalling in the territorial damselfish Stegastes fuscus

Journal of Fish Biology, EarlyView.
Abstract Acoustic communication plays an important role in social interactions in reef fishes, but how signals vary with behavioural context remains poorly understood for many species. We characterised the acoustic repertoire of the Brazilian damselfish Stegastes fuscus using synchronised underwater audio–video recordings and tested how sound features ...
Aléxia A. Lessa, Viviane Barroso, Fábio C. Xavier, Carlos E. L. Ferreira, Eric Parmentier   +4 more
wiley   +1 more source

Metabolic adjustments in Satanoperca aff. jurupari (Perciformes: Cichlidae)

Genetics and Molecular Biology, 2003
In this paper, we describe the enzyme levels and isozyme distribution in skeletal and heart muscle of Satanoperca aff. jurupari, (Cichlidae, subgroup Geophaginae). LDH and CS were measured in skeletal and heart muscle. Starch gel electrophoresis was used
Chippari-Gomes Adriana R., Leitão Marco Aurélio B., Paula-Silva Maria de Nazaré, Mesquita-Saad Lenise S. B. de, Almeida-Val Vera Maria F.   +4 more
doaj  

Socio‐Economic and Ecological Drivers of the Spread of Non‐Native Tilapia (Oreochromis niloticus) Species in Kenya

Aquaculture, Fish and Fisheries, Volume 6, Issue 5, October 2026.
ABSTRACT Nile tilapia (Oreochromis niloticus) is the dominant non‐native fish species in Kenya's inland waters, but its spread reflects a coupled socioecological process rather than a simple biological invasion. This review examines the socio‐economic, governance and ecological drivers of its expansion within a socioecological systems and invasion ...
Otieno Kashim Oginga, Robert Maina Waruiru, Finnan Okoth Ageng'o, Callen Onura, Caroline Jepkorir Kibet   +4 more
wiley   +1 more source

Neuroanatomical diversity in Teleocichla with new volumetric and histological insights into the encephalon of Teleocichla monogramma Kullander 1988

The Anatomical Record, Volume 309, Issue 10, Page 2897-2912, October 2026.
Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis, Keila Xavier Magalhães, Thiago Nilton A. Pereira, Janice Muriel‐Cunha, Alberto Akama   +4 more
wiley   +1 more source

Pronounced expression of extracellular matrix proteoglycans regulated by Wnt pathway underlies the parallel evolution of lip hypertrophy in East African cichlids

eLife
Cichlid fishes inhabiting the East African Great Lakes, Victoria, Malawi, and Tanganyika, are textbook examples of parallel evolution, as they have acquired similar traits independently in each of the three lakes during the process of adaptive radiation.
Nagatoshi Machii, Ryo Hatashima, Tatsuya Niwa, Hideki Taguchi, Ismael A Kimirei, Hillary DJ Mrosso, Mitsuto Aibara, Tatsuki Nagasawa, Masato Nikaido   +8 more
doaj   +1 more source