Menu

Image of the Day: The Long and Short of It

For flycatchers, the attractiveness of male birds is tied to the length of their sperm.

Aug 20, 2018
Sukanya Charuchandra
Flycatcher sperm
MURIELLE ÅLUND

Researchers studying flycatcher birds have found that sperm morphology—and thus reproductive success—are linked with the age and attractiveness of males. The size of white patches on the birds’ foreheads, a measure of their sex appeal, as well as the shape of their sperm determined how many hatchlings among a mixed brood were a male’s own. For instance, male flycatchers with smaller forehead patches had longer sperm, probably to ensure the swimmers beat the competition, while males with larger patches were successful fathers even with shorter sperm. These findings were published August 9 in Behavioral Ecology.

M. Ålund et al., “Optimal sperm length for high siring success depends on forehead patch size in collared flycatchers,” Behav Ecol, doi:10.1093/beheco/ary115, 2018.

Clarification (August 21): We removed the word “several” from “several sperm morphology” in the first sentence for clarity.

September 2018

The Muscle Issue

The dynamic tissue reveals its secrets

Marketplace

Sponsored Product Updates

StemExpress LeukopakâNow Available in Frozen Format

StemExpress LeukopakâNow Available in Frozen Format

StemExpress, a Folsom, California based leading supplier of human biospecimens, announces the release of frozen Peripheral Blood Leukopaks. Leukopaks provide an enriched source of peripheral blood mononuclear cells (PBMCs) with low granulocyte and red blood cells that can be used in a variety of downstream cell-based applications.

New Antifade Mounting Media from Vector Laboratories Enhances Immunofluorescence Applications

New Antifade Mounting Media from Vector Laboratories Enhances Immunofluorescence Applications

Vector Laboratories, a leader in the development and manufacture of labeling and detection reagents for biomedical research, introduces VECTASHIELD® Vibrance™ – antifade mounting media that delivers significant improvements to the immunofluorescence workflow.

Best Practices for Sample Preparation and Lipid Extraction from Various Samples

Best Practices for Sample Preparation and Lipid Extraction from Various Samples

Download this white paper from Bertin Technologies to learn how to extract and analyze lipid samples from various models!

Bio-Rad Launches CHT Ceramic Hydroxyapatite XT Media and Nuvia HP-Q Resin for Process Protein Purification

Bio-Rad Launches CHT Ceramic Hydroxyapatite XT Media and Nuvia HP-Q Resin for Process Protein Purification

Bio-Rad Laboratories, Inc. (NYSE: BIO and BIOb), a global leader of life science research and clinical diagnostic products, today announced the launch of two new chromatography media for process protein purification: CHT Ceramic Hydroxyapatite XT Media and Nuvia HP-Q Resin.