Hilaire, both in varieties and in species, that when any part or organ is repeated many times in the structure of the same individual (as the vertebrae in snakes, and the stamens in polyandrous
flowers) the number is variable; whereas the number of the same part or organ, when it occurs in lesser numbers, is constant.
Multiple paternity in polyandrous
Barn Owls (Tyto alba).
Monogamy is strictly practiced in Cofan, Kichwa and Secoya communities, (18) and it is the norm among the Shuar, although they occasionally practice polygamy as well; (19) polygamous, polyandrous
and monogamous mating schemes are all acceptable among the Waorani.
However, females in the Asian glow-worm firefly Pyrocoelia pectoralis were also found to be highly polyandrous
, mating with up to 7 different males (Fu et al.
I shall begin by tracing some of the basic features of polyandrous
marriage as it is practiced on the Tibetan plateau.
The number of yearlings was higher for polyandrous
females for three of the four species.
Contrast polygynous or polyandrous
marriage with group marriage, where each spouse is married to every other spouse.
He does this in terms of how bees respond to stimuli in their environment, but also shows how polyandrous
mating on the part of queen bees contributes to genetic variation and thereby stimulus-response variation.
While most bird species are monogamous, females are often polyandrous
, breeding with two males at once.
On the other hand, Bombacaceae exhibits tree habit, have polyandrous
flowers with unilocular anthers and smooth pollen [14,48,28].
All cultures have marriage, but some cultures are polygamous, some at least nominally monogamous, and a very few, under special conditions, are polyandrous
Females are polyandrous
, and agonistic male-male interactions are common, suggesting direct competition for mates or mating territories (DeMartini, 1988).