31. The mating system of the gray hawk is monogamous. 32. Studies have illustrated the fluidity of dunnock mating systems . 33. The mating system of the white-throated woodrat is polygynous. 34. Palmer studies fiddler crabs, a species whose mating system clearly is affected by the moon's phases. 35. Assessments of the mating system of this species have found that outcrossing rates vary between populations. 36. This may suggest a more promiscuous mating system , where females mate with more than one male. 37. Testes mass of various species of Primates in relation to their body size and mating system . 38. Inbreeding depression seems to be present in most groups of organisms, but varies across mating systems . 39. This is often seen within lek mating systems . 40. Researchers have observed a mixed mating system of monogamy and polygyny in the European pied flycatcher.
