The rate of aragonite deposition varies diurnally and seasonally. In addition, temperature fluctuations can vary greatly in these systems, both diurnally and seasonally. Brown bullheads are typically nocturnal feeders, but have been reported to feed diurnally. They may also hunt diurnally, however. The emissions occur diurnally or throughout the day, even when the vehicle is parked. Males tend to incubate the eggs diurnally and females, mostly nocturnally. Species are diurnally mesopelagic, migrating into surface waters during the night. It is mostly nocturnal, only active diurnally during the rainy season. Post-migrant larvae are benthic, foraging up- and downstream diurnally with a nocturnal activity peak. The larvae rest on the upper surface of the foliage, and feed diurnally. The temperature range is narrow both seasonally and diurnally, while air moisture is relatively high. They are typically active diurnally in cooler weather and nocturnally during hot weather "C. viridis". SST changes diurnally, like the air above it, but to a lesser degree. Salticids hunt diurnally as a rule, which is consistent with their highly developed visual system.