Results 201 to 210 of about 612,947 (307)

Virtual dissection of Aedes aegypti mosquito using phase‐contrast synchrotron microtomography

open access: yesJournal of Microscopy, EarlyView.
Abstract In this paper, in‐line phase‐contrast synchrotron microtomography was used to study the morphology of adult Aedes aegypti. These specimens are vectors of several arboviruses, causing dengue, chikungunya, Zika and yellow fever. The morphological details of this insect species are still incomplete and insufficient.
Gabriela Sena   +15 more
wiley   +1 more source

Impact of age, follicle stimulating hormone and Johnsen's score on successful sperm retrieval by microdissection testicular sperm extraction [PDF]

open access: gold, 2005
Akira Tsujimura   +11 more
openalex   +1 more source

Hybridization and gene expression: Beyond differentially expressed genes

open access: yesMolecular Ecology, EarlyView.
Abstract Gene expression has a key role in reproductive isolation, and studies of hybrid gene expression have identified mechanisms causing hybrid sterility. Here, we review the evidence for altered gene expression following hybridization and outline the mechanisms shown to contribute to altered gene expression in hybrids. Transgressive gene expression,
Anna Runemark   +2 more
wiley   +1 more source

Sexual Selection on Non‐Ornamental Traits Is Underpinned by Evidence of Genetic Constraints on Sex‐Biased Expression in Dusky Pipefish

open access: yesMolecular Ecology, EarlyView.
ABSTRACT Species lacking distinct secondary sex characteristics, such as differences in size or morphology, are often thought to experience lower levels of sex‐specific selection in comparison to highly sexually dimorphic organisms. However, monomorphism in classic visible traits could be a result of genetic or physiological constraints that prevent ...
Nicole M. Tosto   +4 more
wiley   +1 more source

Resolving the Population Structure and Demographic History of the European Anchovy in the Northeast Atlantic: Tracking Historical and Contemporary Environmental Changes

open access: yesMolecular Ecology, EarlyView.
ABSTRACT The spatial distribution of the European anchovy has expanded in the northern part of its range in the Northeast Atlantic in recent decades. However, whether this results from a northward range shift of southern conspecifics or the expansion of a local northern population is unknown. Using for the first time whole‐genome sequencing, we explore
José Martin Pujolar   +7 more
wiley   +1 more source

Expression of inhibin α, glial cell line-derived neurotrophic factor and stem cell factor in Sertoli cell-only syndrome: relation to successful sperm retrieval by microdissection testicular sperm extraction [PDF]

open access: bronze, 2005
Kazutoshi Fujita   +9 more
openalex   +1 more source

No Mate, No Problem: Molecular Mechanisms Involved in Parthenogenesis in the Cosmopolitan Earthworm Aporrectodea trapezoides (Annelida, Clitellata)

open access: yesMolecular Ecology, EarlyView.
ABSTRACT Approximately, 40% of earthworm species can reproduce by parthenogenesis. This is the case for the cosmopolitan species, Aporrectodea trapezoides, although sexual forms have been described sporadically. We analyse the genotypes and microbiomes of 30 individuals from four localities where both forms appear in order to understand the ...
Irene de Sosa   +9 more
wiley   +1 more source

Age as a Limiting Factor for Successful Sperm Retrieval in Nonmosaic Klinefelter Syndrome [PDF]

open access: bronze, 2005
Hiroshi Okada   +5 more
openalex   +1 more source

Smooth Muscle Mechanosensitivity Generates and Maintains Pressure Gradients Across the Intestine

open access: yesNeurogastroenterology &Motility, EarlyView.
Mechanosensitivity of the smooth muscle induces a positive‐feedback loop that spontaneously generates pressure gradients across gut segments and stabilizes initially applied pressure gradients. It can act jointly or compete with the pressure gradient induced by directional peristaltic waves.
Richard J. Amedzrovi Agbesi   +2 more
wiley   +1 more source

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