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Developmental plasticity does not improve performance during a species interaction: Implications for species turnover.
Ecology
January 2025
Department of Biology, Centre for Biodiversity Dynamics (CBD), Norwegian University of Science and Technology (NTNU), Trondheim, Norway.
Species interactions can contribute to species turnover when the outcomes of the interactions are context dependent (e.g., change along environmental gradients).
View Article and Find Full Text PDFAlthough sex determination is a fundamental process in vertebrate development, it is very plastic. Diverse genes became major sex determinants in teleost fishes. Deciphering how individual sex-determining genes orchestrate sex determination can reveal new actors in sexual development.
View Article and Find Full Text PDFDiet and predation risk affect tissue and excretion nutrients of Trinidadian guppies: a field survey.
Sci Rep
December 2024
Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA.
Consumers vary in their excretion of nitrogen and phosphorus, altering nutrient cycles and ecosystem function. Traditional mass balance models that focus on dietary and tissue nutrients have poorly explained such variation in excretion. Here, we contrast diet and tissue nutrient models for nutrient excretion with predation risk, an often overlooked factor, using the Trinidadian guppy (Poecilia reticulata) as our model system.
View Article and Find Full Text PDFEnrichment effects on growth, health, and reproduction in a single clone of the asexual Amazon molly, .
PeerJ
December 2024
School of Biological Sciences, University of Oklahoma, Norman, Oklahoma, United States.
This study examines the impact of two types of environmental enrichment on the growth of the Amazon molly (), a clonal fish species. We investigated the effects of two welfare-related enrichment factors: physical enrichment (presence of a halfpipe PVC and gravel substrate, E) and social enrichment (presence of visible neighbor fish, N). Fish were divided into four treatment groups: (1) both physical and social enrichment (EN), (2) no physical enrichment but social enrichment (nEN), (3) physical enrichment without social enrichment (EnN,), and (4) no enrichment (nEnN).
View Article and Find Full Text PDFA new restricted-range Melanorivulus (Cyprinodontiformes: Rivulidae) from the upper rio Guaporé, Chapada dos Parecis, Brazil.
Zootaxa
August 2024
Universidade Federal do Amazonas; Departamento de Biologia; Av. Rodrigo Otávio; Japiim; 69077-000; Manaus; AM; Brazil.
A new species of Melanorivulus, belonging to the Melanorivulus zygonectes species group, is described from the rio Galera, a tributary of the right bank of the upper rio Guaporé, Amazon basin, Mato Grosso state, Brazil. It is diagnosed from congeners by the following combination of characters: absence of pelvic fins; presence of a black band along the entire caudal-fin margin in males, typically more conspicuous on dorsal and ventral portions; presence of a wide oblique bars anteriorly and wide chevron-like marks posteriorly to middle of flank. This is the first record of the genus Melanorivulus for the rio Madeira basin.
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