Results 31 to 40 of about 275 (141)

The opportunistic feeding and reproduction strategies of the annual fish Cynopoecilus melanotaenia (Cyprinodontiformes: Rivulidae) inhabiting ephemeral habitats on southern Brazil

open access: yesNeotropical Ichthyology
Most Rivulidae fishes are popularly known as annual fishes which live in ephemeral environments such as pools, that obligatorily dry out seasonally causing the death of adult individuals.
Cristina da Silva Gonçalves   +2 more
doaj   +1 more source

Nutrients on the move: Investigating large scale fatty acid exports from European ponds via emerging insects

open access: yesLimnology and Oceanography, Volume 70, Issue 10, Page 2844-2857, October 2025.
Abstract Permanent ponds are key landscape units that supply various ecosystem services. Notably, the export of aquatic subsidies to land via emerging insects may significantly influence terrestrial food webs. Polyunsaturated fatty acids (PUFA), which enhance consumer fitness, are among the essential exported components.
Lena Fehlinger   +30 more
wiley   +1 more source

Effects of flood regime on the diet of Triportheus curtus (Garman, 1890) in an Amazonian floodplain lake

open access: yesNeotropical Ichthyology, 2011
We analyzed the diet of Triportheus curtus in Lake Amapá on the Acre River (AC - Brazil), during three distinct phases of the hydrological cycle (pre-flooding, flooding, and post-flooding stages).
Jardely de Oliveira Pereira   +3 more
doaj  

Where Do You Fly From? Assessing Aerial Dispersal in Temporary Rivers Using Stable Isotopes

open access: yesFreshwater Biology, Volume 70, Issue 10, October 2025.
ABSTRACT Dispersal is a crucial ecological process that facilitates gene flow and species exchange within ecosystems. In temporary rivers (TRs), dispersal is a key driver of community assembly because it determines the ability of the organisms to adapt to seasonal drying and maintain stable populations.
José María Fernández‐Calero   +6 more
wiley   +1 more source

HOMOLOGIES IN ELEMENTS OF THE LARVAL LABRUM IN CHAOBORIDAE AND CULICIDAE (DIPTERA) [PDF]

open access: yesAustralian Journal of Entomology, 1979
AbstractA scheme of homology is proposed under which the so‐called “labrum” of Chaoborus larvae becomes an apical lobe of the labrum proper and homologous with the midpalatal lobe of Culicidae. Some phylogenetic implications are noted.
openaire   +1 more source

Impact of CO2‐Induced Aquatic Acidification on Environmental DNA and RNA Shedding and Persistence

open access: yesEnvironmental DNA, Volume 7, Issue 4, July–August 2025.
We conducted mesocosm experiments to determine the shedding and decay rate constants of eDNA and eRNA in Pacific oysters (Crassostrea gigas) at various partial CO2 pressures in seawater. To our knowledge, this is the first study manipulating seawater pH using CO2.
Mark Louie D. Lopez   +6 more
wiley   +1 more source

Hydroacoustic assessment of fish and Chaoborus (Diptera-Chaoboridae) distribution in three Neotropical lakes Avaliação hidroacústica da distribuição de peixes e Chaoborus sp. (Diptera-Chaoboridae) em três lagos neotropicais

open access: yesActa Limnologica Brasiliensia, 2012
AIM: This study aims to demonstrate the potential of hydroacoustics in the study of behavior of the invertebrate Chaoborus and fish in neotropical water environments; METHODS: Synoptic campaigns were conducted in May and June-2008 in Dom Helvécio and ...
José Fernandes Bezerra-Neto   +3 more
doaj  

Length–Dry Mass Relationships of Aquatic Insects: Geographic and Taxonomic Variation in a Digital Database

open access: yesFreshwater Biology, Volume 70, Issue 7, July 2025.
ABSTRACT Aquatic insects are an abundant, yet declining, taxonomically heterogeneous group with special importance in both aquatic and terrestrial ecosystems. Accurate estimations of insect biomass during their aquatic life stages are essential to advance our fundamental knowledge about insects, their roles in ecosystems, and their vulnerability to ...
Casper H. A. van Leeuwen   +4 more
wiley   +1 more source

Estimating Rapid Diversity Changes During Acute Herbicide Contamination Using Environmental DNA

open access: yesEnvironmental DNA, Volume 7, Issue 1, January–February 2025.
This study evaluates the use of environmental DNA metabarcoding to examine rapid changes in aquatic invertebrate communities following exposure to glyphosate‐based herbicide (GBH) in mesocosms under contrasted nutrient levels. We show a shift in community composition induced by GBH, and different impacts on zooplankton and insect family richness.
Alessandra Loria   +8 more
wiley   +1 more source

Comparing two biological indexes using benthic macroinvertebrates: positive and negative aspects of water quality assessment

open access: yesActa Limnologica Brasiliensia
: Aim The aim of the present study, was to apply two biological indexes based on benthic macroinvertebrates (BMWP and ICB RES-P) using as model the Itupararanga Reservoir to know what the advantages and disadvantages of the application of each index in ...
Vinicius Moraes Rodrigues   +3 more
doaj   +1 more source

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