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000067881 005 __20140607191144.0
000067881 024 8_ $9 artpubuab $9 driver $a oai:ddd.uab.cat:67881
000067881 024 7_ $2 doi $a 10.1073/pnas.0813385106
000067881 041 __ $a eng
000067881 100 __ $a Köhler, Meike $u Institució Catalana de Recerca i Estudis Avançats (ICREA) $u Institut Català de Paleontologia
000067881 245 1_ $a Slow life history and physiological plasticity : survival strategies of a large mammal in a resource-poor environment
000067881 500 __ $a Premi a l'excel·lència investigadora. 2010
000067881 520 3_ $a Because of their physiological and life history characteristics, mammals exploit adaptive zones unavailable to ectothermic reptiles. Yet, they perform best in energyrich environments because their high and constant growth rates and their sustained levels of resting metabolism require continuous resource supply. In resource-limited ecosystems such as islands, therefore, reptiles frequently displace mammals because their slow and flexible growth rates and low metabolic rates permit them to operate effectively with low energy flow. An apparent contradiction of this general principle is the long- term persistence of certain fossil large mammals on energy-poor Mediterranean islands. The purpose of the present study is to uncover the developmental and physiological strategies that allowed fossil large mammals to cope with the low levels of resource supply that characterize insular ecosystems. Long-bone histology of Myotragus, a Plio-Pleistocene bovid from the Balearic Islands, reveals lamellarzonal tissue throughout cortex, a trait exclusive to ectothermic reptiles. The bone microstructure indicates that Myotragus grew unlike any other mammal but similar to crocodiles at slow and flexible rates, ceased growth periodically, and attained somatic maturity extremely late by about 12 years. This developmental pattern denotes that Myotragus, much like extant reptiles, synchronized its metabolic requirements with fluctuating resource levels. Our results suggest that developmental and physiological plasticity was crucial to the survival of this and, perhaps, other large mammals on resource-limited Mediterranean Islands, yet it eventually led to their extinction through a major predator, Homo sapiens.
000067881 540 __ $a Tots els drets reservats $u http://www.europeana.eu/rights/rr-f/
000067881 546 __ $a Anglès.
000067881 599 __ $a recerca
000067881 653 1_ $a PREI 2010
000067881 653 1_ $a Paleohistology
000067881 653 1_ $a Mammals
000067881 653 1_ $a Myotragus
000067881 653 1_ $a Physiology
000067881 653 1_ $a Life history
000067881 655 _4 $a info:eu-repo/semantics/article
000067881 655 _4 $a info:eu-repo/semantics/submittedVersion
000067881 700 __ $a Moyà-Solà, Salvador $u Institució Catalana de Recerca i Estudis Avançats (ICREA) $u Institut Català de Paleontologia
000067881 773 __ $g Vol. 106, Núm. 48 (2009), p. 1-18 $t PNAS. Proceedings of the National Academy of Sciences of the United States of America $x 
000067881 856 40 $p 18 $s 5131316 $u http://ddd.uab.cat/pub/artpub/2009/67881/PREI2010_pnasv106n48.pdf $z Pre-print
000067881 973 __ $f 0001 $l 18 $m  $n 48 $v 106 $x v106n48 $y 2009
000067881 980 __ $a ARTPUB $b UAB $b PREI