Results 41 to 50 of about 4,870 (138)

Occurrence of multiple congenital anomalies in Potamotrygon amandae (Elasmobranchii, Potamotrygoninae) embryos, including the first report of bicephaly

open access: yesJournal of Fish Biology, EarlyView.
Abstract Reports of teratogenic embryos in elasmobranchs have been documented in multiple species, with proposed aetiologies including environmental disturbances, genetic mutations, predation, exposure to endocrine‐disrupting compounds and maternal stress.
Douglas de Castro Ribeiro   +2 more
wiley   +1 more source

Vegetative and Reproductive Allocation in an Aquatic Macrophyte: The Effects of Light, Nutrients, and Epiphytic Heterocytous Cyanobacteria

open access: yesLimnological Review
The study evaluated the vegetative growth and reproductive strategies of the macrophyte Pistia stratiotes under varying nutrient (carbon and nitrogen) and light (full sun and 70% shade) conditions, as well as its epiphytic association with heterocytous ...
Michel Biondi   +5 more
doaj   +1 more source

Time‐calibrated relationships of a rare cave catfish (Trichomycterus rubbioli): Shedding light on troglobitic lifestyle origin in the Brazilian caatinga

open access: yesJournal of Fish Biology, EarlyView.
Abstract Catfishes of the subfamily Trichomycterinae comprise the most diverse fish group with species adapted to live in Neotropical caves, but past evolutionary scenarios that have driven the origin of these troglobitic species remain unknown. We herein investigate the phylogenetic position of the cave‐restricted Trichomycterus rubbioli, endemic to ...
Wilson J. E. M. Costa   +6 more
wiley   +1 more source

Water availability shapes temporal patterns of extrafloral nectar secretion and ant visitation to a Neotropical legume

open access: yesPlant Biology, EarlyView.
Drought duration affects ant–plant interactions: extrafloral nectar quality initially increases and subsequently declines, and ant interaction patterns closely track these nectar dynamics. Abstract Mutualistic plants use non‐structural sugar (NSC) to produce carbon‐based resources to reward partners.
B. Melati   +3 more
wiley   +1 more source

Seasonality as a structuring factor of the dung beetle community in burned neotropical savannas

open access: yesEcological Entomology, Volume 51, Issue 2, Page 336-345, April 2026.
We tested the effects of fire, vegetation cover and seasonality on dung beetle communities, focusing on species richness, composition and co‐occurrence patterns in savannas. Fire did not affect species richness. However, seasonality was the dominant factor influencing species composition, followed by fire and vegetation cover.
Nayara Letícia Reis   +3 more
wiley   +1 more source

Abiotic drivers of co‐occurrence and diversity patterns of Calopterygidae species in Amazonian protected freshwaters

open access: yesEcological Entomology, Volume 51, Issue 2, Page 235-249, April 2026.
Species co‐occurrences rely on their ability to explore similar or distinct available resources, and possible niche overlap can prevent their presence and establishment in a given site Damselflies of the Calopterygidae family demonstrated negative co‐occurrences in streams inside and outside PAs, highlighting that their ecological similarity is ...
Joás Silva Brito   +13 more
wiley   +1 more source

Biology of Meccus pallidipennis (Hemiptera: Reduviidae) to Other Conditions than that Encountered in Their Native Habitat

open access: yesJournal of Arthropod-Borne Diseases, 2018
Background: Meccus pallidipennis (Hemiptera: Reduviidae) is only found in Mexico and is one of the most important vectors for Trypanosoma cruzi transmission there.
Edson Franzim-Junior   +8 more
doaj  

Stelletta ruetzleri sp. nov., a new ancorinid from the Southwestern Atlantic (Porifera, Astrophorida)

open access: yesScientia Marina, 2002
Stelletta ruetzleri sp. nov., a new ancorinid sponge from the Southwestern Atlantic (Porifera, Astrophorida), collected at 128 and 200 m depth off Rio Grande do Sul State coast, Brazil (31°20´-32°24´S/49°52´-50°15´W), is described and illustrated with ...
Beatriz Mothes, Carla Maria M. Silva
doaj   +1 more source

The role of habitat simplification and seasonality in shaping interactions between ants, plants and herbivores in a neotropical savanna

open access: yesEcological Entomology, Volume 51, Issue 2, Page 381-394, April 2026.
We evaluated how chronic anthropogenic disturbances (CAD) and seasonal variation influence interactions between ants and plants with extrafloral nectaries (EFN's), with emphasis on the responses of ants, herbivores, and plants. Ant and herbivore diversity remained stable across seasons in the preserved cerrado, whereas the pasture had higher ant ...
Edvânia Costa de Oliveira Sá   +6 more
wiley   +1 more source

Phytochemical and Biological Evaluation of Leaves, Stems, and Roots of Schinus weinmanniifolia Mart. Ex Engl.

open access: yesChemistry &Biodiversity, Volume 23, Issue 3, March 2026.
Ethanolic extracts from leaves, stems, and roots of Schinus weinmanniifolia Mart. ex Engl. were evaluated for phytochemical composition and biological activities. The extracts exhibited antioxidant, photoprotective, and antimicrobial activity, without hemolytic effects or cytotoxicity at active concentrations. Syringic acid, epicatechin, and rutin were
João Andrade   +14 more
wiley   +1 more source

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