▁ ▁M igration ▁sched ules ▁differ ▁between ▁sex es ▁which ▁eventually ▁leads ▁to ▁season al ▁changes ▁in ▁the ▁OS R . ▁For ▁example , ▁if ▁males ▁arrive ▁first ▁to ▁the ▁migration ▁site , ▁then ▁for ▁a ▁certain ▁amount ▁of ▁time ▁the ▁population ▁would ▁have ▁a ▁male ▁bi ased ▁OS R . ▁ ▁Sp atial ▁distribution ▁can ▁also ▁cause ▁bi ased ▁in ▁the ▁OS R . ▁So ▁if ▁there ▁is ▁a ▁wide ▁spatial ▁distribution ▁difference ▁between ▁the ▁sex es ▁one ▁would ▁see ▁a ▁bi ased ▁in ▁the ▁OS R ▁depending ▁on ▁what ▁area ▁was ▁being ▁observed . ▁There ▁might ▁be ▁more ▁males ▁than ▁females ▁in ▁one ▁location ▁causing ▁a ▁male ▁bi ased ▁OS R ▁in ▁that ▁particular ▁location . ▁ ▁Mort ality ▁can ▁also ▁change ▁the ▁OS R ▁of ▁a ▁population . ▁For ▁example , ▁if ▁there ▁is ▁a ▁high ▁mort ality ▁rate ▁in ▁males ▁of ▁a ▁specific ▁species ▁one ▁would ▁most ▁likely ▁observe ▁a ▁female ▁bi ased ▁OS R . ▁ ▁Tem per ature ▁can ▁play ▁a ▁large ▁part ▁in ▁OS R ▁of ▁a ▁population . ▁In ▁many ▁re pt iles , ▁sex ▁determ ination ▁is ▁dependent ▁on ▁temperature ▁of ▁the ▁environment ▁during ▁emb ry onic ▁development . ▁Cons ist ently ▁warm ▁or ▁cool ▁environments ▁can ▁result ▁in ▁large ▁bi ases ▁in ▁sex ▁ratio ▁of ▁a ▁population . ▁ ▁References ▁ ▁O ▁Category : E col ogy ▁* ▁Category : Re production <0x0A> </s> ▁" Press ure " ▁is ▁a ▁song ▁by ▁English ▁rock ▁band ▁Muse . ▁It ▁was ▁released ▁as ▁the ▁fifth