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IGB Profile: Ratna Karatgi

June 15, 2023

Investigating mechanisms behind variation in color of killifish

Growing up in South India, Ratna Karatgi found herself moving between cities as her dad relocated for work. Though living in the city meant she was not exposed much to wildlife early on, she quickly became interested in zoology after working as a volunteer at the Madras Crocodile Bank Trust, an educational outreach-focused reptile zoo. There, she says that presentations and experiments by visiting researchers lit the spark for her.


June 15, 2023


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Can parental care influence sperm-mediated effects in threespine sticklebacks?

October 11, 2021

Animals can influence their offspring through multiple signals starting from fertilization to after birth. However, researchers have seldom looked at how these different signals work together to influence behavior. In a new study, postdoctoral researcher Jennifer Hellmann in the Bell lab investigated how changes in sperm and paternal care influence the offspring of threespine sticklebacks.


October 11, 2021


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In darters, male competition drives evolution of flashy fins, bodies

August 1, 2018

Scientists once thought that female mate choice alone accounted for the eye-catching color patterns seen in some male fish. But for orangethroat darters, male-to-male competition is the real force behind the flash, a new study finds.

The research, reported in the Royal Society journal Proceedings B, suggests that separate populations of orangethroat darters are evolving differing color patterns as a result of the males’ ability to distinguish their own from other species.


August 1, 2018


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