Results 31 to 40 of about 6,927 (172)

Warming‐Mediated Decreases in Nectar Quality Translate Into Lower Energy Reserves of the Monarch Butterfly (Danaus plexippus)

open access: yesGlobal Change Biology Communications, EarlyView.
Warming caused a significant decrease in monarch fat mass, likely due to an observed reduction in sucrose concentration caused by warming of the nectar. Since sucrose fuels fall migration and overwintering, our results suggest climate warming may reduce migration success and overwinter survival.
Katherine Peel   +3 more
wiley   +1 more source

Aromatic plants, nest bacterial diversity, and nestling condition in Corsican blue tits

open access: yesOikos, EarlyView.
According to the ‘nest protection hypothesis', some passerines incorporate fresh aromatic plants into their nests which reduce pathogens that can negatively affect nestlings. We experimentally evaluated the effect of five aromatic plant species on the nest bacterial microbiota of Corsican blue tits Cyanistes caeruleus.
Hélène Dion‐Phénix   +5 more
wiley   +1 more source

High migratory potential of fall armyworm in West Africa despite stable temperatures and widely available year‐round habitats

open access: yesInsect Science, EarlyView.
Despite the minimal annual temperature variation and the widespread distribution of potential year‐round habitats in Ghana, the migratory potential of the local fall armyworm remains strong and is indistinguishable from that of the fall armyworm in China, which undergo seasonal migration.
Fan‐Qi Gao   +5 more
wiley   +1 more source

Some aspects on the reproductive cycle of European conger eel, Conger conger (Linnaeus, 1758) (Osteichthyes, Anguilliformes, Congridae) captured from Western Algerian coasts: a histological description of spermatogenesis [PDF]

open access: yesBiodiversity Journal, 2011
The aim of this work was to study the annual reproductive cycle of European conger eel (Conger conger,Linnaeus, 1758) through analysis and description of spermatogenesis.
Abi-ayad Sidi-Mohammed El-Amine
doaj  

Molecular mechanisms of sex determination in Lepidoptera: current status and perspectives

open access: yesInsect Science, EarlyView.
The genetic basis of sex determination in Lepidoptera was discovered in 2014 in the silkworm Bombyx mori. In this model species, the W chromosome‐derived small piRNA called Fem piRNA downregulates the expression of a Z‐linked gene, Masculinizer (Masc), which leads to the default female‐specific splicing of the doublesex gene (dsxF) and thus to female ...
František Marec   +2 more
wiley   +1 more source

“Semillas Ambientales” en el Instituto Pedagógico Arturo Ramírez Montúfar (IPARM) de la Universidad Nacional de Colombia – Sede Bogotá.

open access: yesBio-grafía, 2009
Se promueven actitudes en los aspectos cognitivos, afectivos y comportamentales hacia la conservación de los hábitats en los cuales se desarrollan los insectos, a partir del estudio de la Mariposa Monarca (Danaus plexippus) y su planta nutricia la ...
Nubia Torres Guerra   +1 more
doaj   +1 more source

A long-awaited guest in the Bulgarian fauna, Danaus chrysippus (Linnaeus, 1758) (Lepidoptera), is already here

open access: yesHistoria naturalis bulgarica
The first report of the migratory species Danaus chrysippus (Linnaeus, 1758) from the territory of Bulgaria, from Varna, is presented. Comments on the distribution of the species, its biology, as well as illustrative material are also included.
Stanislav Abadjiev   +2 more
doaj   +1 more source

Common milkweed gardens increase occupancy by monarch butterflies and other specialist herbivores towards an urban centre

open access: yesInsect Conservation and Diversity, EarlyView.
We surveyed 119 stands of common milkweed (Asclepias syriaca) across an urbanisation gradient to investigate how restored garden habitat might ameliorate the negative effects of urbanisation on specialist herbivores. Surprisingly, we found most herbivores (including the monarch butterfly) had greater occupancy on common milkweed towards an urban centre.
Graydon J. Gillies   +2 more
wiley   +1 more source

Northern cod (Gadus morhua) movement: insights from acoustic telemetry and genomics

open access: yesJournal of Fish Biology, EarlyView.
Abstract Knowledge of the timing and diversity of fish movements within a commercially exploited stock complex is required to ensure the sustainability of fisheries. Although migration can be driven by environmental factors, genomic mechanisms also play an important role in this complex life‐history trait. The northern cod (Gadus morhua) stock complex,
M. Lisette Delgado   +10 more
wiley   +1 more source

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