Harvestmen are a major arachnid order that has experienced a dramatic increase in
biological knowledge in the 21st century. The publication of the book Harvestmen: The …

The ecosystem services provided by dung beetles are well known and valued. Dung beetles
bury dung for feeding and breeding, and it is generally thought that the process of burying …

Males often strategically adjust the number of available sperm based on the social context
(ie sperm priming response), but it remains unclear how environmental and genetic factors …

There is growing evidence that the environment experienced by one generation can
influence phenotypes in the next generation via transgenerational plasticity (TGP). One of …

Highlights•The two male morphs of Maevia inclemens (tufted and striped) look and behave
differently.•For tufted males, we manipulated tuft lengths using false eyelashes.•For striped …

Fight outcomes often affect male fitness by determining their access to mates. Thus,“winner-
loser” effects, where winners often win their next contest while losers tend to lose, can …

In some squids, such as those in the family Loliginidae, upon copulation, females receive
and store male-delivered sperm capsules, spermatangia, at two different body locations: the …

Several predictions of sperm competition theory are not well supported empirically. One
potential reason is that most current theory and empirical research ignore how the social …

Male–male contests for access to females or breeding resources are critical in determining
male reproductive success. Larger males and those with more effective weaponry are more …

Fish often spawn eggs with ovarian fluids that have been hypothesized to support the sperm
of some males over others (cryptic female choice). Alternatively, sperm reactions to ovarian …