Results 31 to 40 of about 393 (167)

Terminal Filament Bundling Underlies the Development of Ovariole Number Dimorphism Between Queen and Worker Ants

Evolution &Development, Volume 28, Issue 3, September 2026.
We trace the formation of the cell structures known to determine ovariole number in the model insect Drosophila melanogaster, called terminal filaments. By investigating the formation of terminal filaments and ovarioles during queen and worker development in ants, we confirm the existence of terminal filament bundling (white arrows) and show that it ...
Claire Ramsay, Paul Lasko, Ehab Abouheif
wiley   +1 more source

Meat Acquisition Skill and Male Reproductive Success in Guinea Baboons

American Journal of Biological Anthropology, Volume 190, Issue 4, August 2026.
ABSTRACT Objectives In human foraging societies, hunting skill is often interpreted as a signal of male quality linked to reproductive success through his ability to provision his family and community. Similarly, in some bird and insect species, males offer mates food to indicate their quality as a provider.
William J O'Hearn, Federica Dal Pesco, Roger Mundry, Julia Fischer   +3 more
wiley   +1 more source

Mito‐Nuclear Discordance and Species Boundaries in the Freshwater Fish Genus Cyprinion Revealed by Genome‐Wide SNPs

Ecology and Evolution, Volume 16, Issue 8, August 2026.
The cyprinid genus Cyprinion exhibits complex and contentious species boundaries across western Asia due to extensive morphological overlap and shallow mitochondrial divergence. Using integrated COI and genome‐wide SNP analyses, we identified distinct genomic clusters among several taxa despite shared mitochondrial haplotypes, revealing signatures of ...
Iraj Hashemzadeh Segherloo, Matthias F. Geiger, Eric Normandeau, Jörg Freyhof   +3 more
wiley   +1 more source

Ontogeny and Homology of the Shoulder Joint and Forelimb Muscles in Frogs and Toads (Lissamphibia: Anura)

Journal of Morphology, Volume 287, Issue 8, August 2026.
The ontogenetic development, innervation, and morphology of the shoulder joint and forelimb muscles were investigated in 11 anuran species. The results reveal largely conserved splitting patterns of the dorsal and ventral pre‐muscle masses, alongside interspecific variation in muscle subdivision and morphology.
Robin Saulnier Masson, Karolin Engelkes
wiley   +1 more source

Sanitation felling against the European spruce bark beetle: A matter of intensity and forest type Tagli fitosanitari contro il bostrico tipografo: una questione di intensità e tipologia forestale

Agricultural and Forest Entomology, Volume 28, Issue 3, Page 382-397, August 2026.
We assess the effect of sanitation felling performed in 2022 in North‐Eastern Italy on bark beetle damage that occurred in 2023 across eight spruce forest types, as evaluated using multispectral satellite imagery. Bark beetle damage was reduced only at very high or very low sanitation felling rates.
Aurora Bozzini, Michele Missoni, Giacomo Santoiemma, Iris Bernardinelli, Rinaldo Comino, Massimo Faccoli   +5 more
wiley   +1 more source

Expected years ever married

Demographic Research, 2018
Background: In the second half of the 20th century, remarkable marriage changes were seen: a great proportion of never married population, high average age at first marriage, and large variance in first marriage timing.
Ryohei Mogi, Vladimir Canudas-Romo
doaj   +1 more source

Study on Life History Strategies of Anurans in Tropical Rainforest: Lifespan and Age at Sexual Maturity

Ecology and Evolution, Volume 16, Issue 7, July 2026.
This study presents the first comprehensive analysis of lifespan and age at sexual maturity in seven common anuran species from Hainan Island's tropical rainforest, filling a critical gap in tropical amphibian ecology. The results reveal significant interspecific variation in lifespan (5 ~ 9 years) and maturity age (3 ~ 5 years), indicating a “slow ...
Rui Guo, Li Zhu, Longhui Zhao, Xiaofei Zhai, Tongliang Wang, Jichao Wang   +5 more
wiley   +1 more source

Global analysis of annual survival among shorebirds reveals a negative effect of migration distance and a decline in recent decades

Oikos, Volume 2026, Issue 7, July 2026.
Annual survival is a key demographic parameter driving population trends in wildlife populations. However, despite numerous species‐specific or regional studies, global reviews of the factors affecting the survival of declining taxa remain scarce. Here, we investigated annual survival of fledged immature and adult shorebirds, a globally‐distributed and
Guillaume Dillenseger, Christopher H. J. Sparkes, Tamás Székely, Brett K. Sandercock, Robert P. Freckleton, Vojtěch Kubelka   +5 more
wiley   +1 more source

Fertility Decline in Malawi: A Decomposition Analysis

Populasi
Fertility in Malawi has been declining since the late 1980s. Total Fertility Rate is reported to have declined by 1.1 children per woman from 5.7 in 2010 to 4.6 in 2015. This reduction indicates a continuing rapid decline in fertility in the country.
Martin Enock Palamuleni
doaj   +1 more source

A new species of inseminating catfish of the genus Tympanopleura (Siluriformes: Auchenipteridae) from the Ituxi River, Amazon River basin, northern Brazil, revealed by integrative taxonomy

Journal of Fish Biology, Volume 109, Issue 1, Page 520-530, July 2026.
Abstract A new species of the genus Tympanopleura is described from the Iquiri River, a tributary of the Ituxi River, a right‐bank tributary to the Purus River, Amazon River, northern Brazil. The new species is distinguished from all its congeners by a combination of features, such as the presence of an intensely pigmented square‐shaped blotch on the ...
Frank Raynner V. Ribeiro, Cárlison Silva‐Oliveira, Valdenor Magalhães, Lucas Gama, Lúcia H. Rapp Py‐Daniel   +4 more
wiley   +1 more source