Photoperiod In Gammarus Setosus

The abiotic factor that we plan to investigate and study is the light intensity. The length of the photoperiod in a Gammarus setosus’s habitat is linked to them being able to successfully grow and reproduce (Steele & Steele, 1970). The Gammarus setosus contain modified cilia, which are the primary sensory receptors in several photoreceptors (Steele, 1986). There have also been studies that show that the reproductive cycle of a female Gammarus setosus can be faster or slowed down by the photoperiod (Steele, Steele, & MacPherson, 1977). Furthermore, there is also evidence that photoperiod has an influence on the timing of the reproductive cycle (Steele et al., 1977). The less exposure to a specific amount of photoperiod (light) leads to an increase