With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Some species of mammal display reproductive behavior in which one female reproduces with multiple males.
text_B: In behavioral ecology , polyandry is a class of mating system where one female mates with several males in a breeding season .. behavioral ecology. behavioral ecology. mating system. mating system. Polyandry is often compared to the polygyny system based on the cost and benefits incurred by members of each sex .. Polygyny is where one male mates with several females in a breeding season -LRB- e.g. , lions , deer , some primates , and many systems where there is an alpha male -RRB- .. Polygyny. Polygyny. alpha male. Alpha ( biology ). A common example of polyandrous mating can be found in the field cricket -LRB- Gryllus bimaculatus -RRB- of the invertebrate order Orthoptera -LRB- containing crickets , grasshoppers , and groundhoppers -RRB- .. Gryllus bimaculatus. Gryllus bimaculatus. Polyandrous behavior is also prominent in many other insect species , including the red flour beetle and the species of spider Stegodyphus lineatus .. red flour beetle. red flour beetle. Stegodyphus lineatus. Stegodyphus lineatus. Polyandry also occurs in some primates such as marmosets , mammal groups , the marsupial genus ' Antechinus and bandicoots , around 1 % of all bird species , such as jacanas and dunnocks , insects such as honeybees , and fish such as pipefish .. Antechinus. Antechinus. pipefish. pipefish. Among the whales , polyandrous behavior has been noted among the bowhead , harbour porpoise -LRB- Phocoena phocoena -RRB- , and humpback whales .. bowhead. bowhead. harbour porpoise. harbour porpoise. humpback whales. humpback whales
related.