Divorce in monogamous birds has been seen to range from as low as 0% in waved albatrosses (Diomedea irrorata) to almost 100% in great blue herons (Ardea herodias). Photo via Adobe Stock As with humans, monogamous pair bonds are frequently observed in the animal kingdom and their long-term success varies just as ours does. Having known several married couples who have decided to call it quits, I can appreciate that humans don’t always get it
Welcome to Biology Class with Dr. B! This fall I am offering online tutoring in biology and environmental sciences. These tutoring sessions are perfect for students with a passion for science, or those who may benefit from science topics being presented in a new way. Parents who are anxious about homeschooling higher-level sciences can have the help of an expert! At the Surrey Science Fair Tutoring sessions are conveniently offered entirely online via Zoom in
Mother birds are able to alter the unique properties of their eggs based on the identity of the father. Paternal quality can play a huge role in a mother’s investment in his eggs. After all, not all male partners were created equally, and there is a myriad of ways in which females discern their most appropriate partner. The mating systems employed in the bird world are diverse and include varying levels of paternal care and
Guest post by Aurora Licensed from Adobe Stock (#254379436) With only 28% of women making up the science and engineering workforce, it’s no secret that women are underrepresented in these fields. It’s vital to get more girls into STEM at younger ages, and to reach gender equality isn’t the only reason. Here are three reasons it’s important to keep girls engaged in STEM throughout their lives. 1. Diversity Produces Better Results If you have a
Male fiddler crabs (Uca species) have one enlarged claw that is used for a waving courtship display. Females prefer males with large claws and fast waves. Photo via Adobe Stock Or so it was thought. Most research on the subject had been conducted under controlled conditions that isolated these traits. What happens when sex-selected characteristics are not isolated, and environmental variation comes into play? Fiddler crab vision is specialized to mudflat environments that are flat,
Misdirected courtship can lead to more serious consequences than the decreased biological success of a few individuals, as seen in the explosive breeding and “functional necrophilia” of an Amazonian frog. When invading species threaten the existence of native ones, reproductive interference can have dire consequences, many having to do with aggressive (invasive) males courting native females. Females Cannot Identify Males of the Same Species, But Still Need to Be Fertilized For example, populations of the
Although rare, there are three identified (so far) amphibian species where females can engage in either egg-laying (oviparity) or give birth to live young (viviparity). Zootoca Vivipara – The Viviparous Lizard The lizard Zootoca vivipara is one species that demonstrates this capability. Viviparous and oviparous populations are almost always geographically separated. Photo via Adobe Stock Viviparous females commonly have a larger body size. This makes sense considering that they will carry eggs with an increasing