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The South
American water rat is a polygynous mammal in which males will increase their home range in attempt to mate with many females to produce the most offspring possible. Although males tend to be sexually active all year long, seasonal breeding patterns are suggested since females have a higher
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is an omnivorous mammal with a diet ranging from fruits and leaves to insects and small fish. The South
American water rat tends to feed more often after the end of the wet season, when food is in abundance. Many newborn water rats will grow bigger during this time period, because they have access
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When swimming and searching for food, the South
American water rat is able to detect objects under water and lift them above the surface in order to inspect to see if the object is edible or not using olfaction and sight. When hunting on land it is able to secure prey but pouncing and grasping with
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The South
American water rat inhabits elevations from sea level to around 2,000 m, in areas from the northern coast of South America to Brazil, Argentina and the western slope of the Andes. Almost all of these mammals are found a small (2 m) distance from tropical forest streams and rivers. They
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Gestation periods last around 30 days and young have an average body length between 10-11 grams, with litters as small as 1 offspring and as large as 7. Males are generally absent when raising the altricial young, so the female is responsible for feeding and caring for their young.
620:
Maia, V.; Yonenaga-Yassuda, Y.; Freitas, T. R. O.; Kasahara, S.; Suñe-Mattevi, M.; Oliveira, L. F.; Galindo, M. A.; Sbalqueiro, I. J. (1984). "Supernumerary chromosomes, Robertsonian rearrangement and variability of the sex chromosomes inNectomys squamipes (Cricetidae, Rodentia)".
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have a larger skull that occupies well-developed supraorbital ridges and lambdoidal crests, giving the mammal great attachments for jaw muscles and a strong bite. This strong bite is shown useful with its large, strong incisors that are greatly curved.
369:, which causes the disease Schistosomiasis. This disease is caused by parasitic worms found in freshwater, which may have been consumed by the South American water rat. Studies focus in endemic areas of Brazil that have large populations of
574:
Gentile, Rosana; Costa-Neto, Sócrates F; Gonçalves, Margareth ML; Bonecker, Simone T; Fernandes, Fabiano A; Garcia, Juberlan S; Barreto, Magali G M; Soares, Marisa S; D'Andrea, Paulo S; Peralta, José M; Rey, Luis (October 2006).
278:. This pelage is made up of wool hairs and guard hairs and is darker dorsally and tends to be lighter grey on its sides and ventrally. The tail is much less covered in hair, and length is around 75% of the body length.
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based on their size and morphology of their hindfeet. They are the largest of the family (average of 216g) and have long hind legs with partially webbed feet to aid in swimming and have completely scaled heels.
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Nests are generally built that are similar to those of birds and consists of dry twigs and leaves woven together. They are built inside dead trees alongside streams and under dense vegetation for protection.
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pregnancy rate during the wet season, which is August to
November in South America. This will produce offspring that have an abundant food source when born, resulting in greater growth and larger populations.
266:
is derived from Greek words meaning "mouse" and "swimming". One unique morphological characteristic is the distinct primitive cuspidate pattern of their cheekteeth, which have
373:, in attempt to find a correlation between the water rat and disease in residents of endemic areas. A great correlation between species presence and disease has been shown.
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is a solitary mammal that is active during the night. The males have a much less defined home range and tend to roam, while the females are very territorial.
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577:"An ecological field study of the water-rat Nectomys squamipes as a wild reservoir indicator of Schistosoma mansoni transmission in an endemic area"
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are very good swimmers and climbers, which act as short-term defenses against predation. Their darkened dorsal pelage may also act as camouflage.
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495:
D'Andrea, P.S.; Horta, C.; Cerqueira, R.; Rey, L. (1 October 1996). "Breeding of the water rat ( Nectomys squamipes ) in the laboratory".
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molars, teeth crowned earlier in life and the outer fold of the upper molars tend to be more isolated as enamel islands. The
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tend to prefer the moist habitats in forested areas such as swamps or marshes, and are sometimes found inhabiting caves
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A systematic review of the
Neotropical water rats of the genus Nectomys (Cricetinae)
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The South
American water rat has mainly one predator, the barn owl (
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tends to have relatively longer, less hairy ears and a glossy, long
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257:, or the South American water rat can be distinguished from other
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Mammal
Species of the World: A Taxonomic and Geographic Reference
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Vieira, E.; Bonvicino, C.R.; D'elia, G.; Pardinas, U (2017) .
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242:— found primarily near forest rivers and streams in the
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is commonly studied as a reservoir for the organism
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322:to more food than those born during drier periods.
532:Ernest, Kristina A. (1986). "Nectomys squamipes".
651:"Nectomys squamipes (South American water rat)"
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481:Learn how and when to remove this message
444:This article includes a list of general
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7:
2649:IUCN Red List least concern species
717:IUCN Red List of Threatened Species
581:Memórias do Instituto Oswaldo Cruz
450:it lacks sufficient corresponding
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223:, is a semiaquatic insectivorous
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594:10.1590/S0074-02762006000900018
681:Johns Hopkins University Press
1:
326:Life history and reproduction
2659:Fauna of the Atlantic Forest
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665:; Carleton, M. D. (2005).
509:10.1258/002367796780739835
406:Musser & Carleton 2005
2679:Mammals described in 1827
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189:
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74:Scientific classification
72:
50:
41:
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673:; Reeder, D. M. (eds.).
289:Distribution and habitat
217:South American water rat
213:Atlantic Forest nectomys
557:Hershkovitz, P (1944).
465:more precise citations.
358:Transmission of disease
667:"Superfamily Muroidea"
221:scaly-footed water rat
18:Scaly-footed water rat
2580:Paleobiology Database
724:: e.T14475A115122358.
2664:Mammals of Argentina
2332:Ekbletomys hypenemus
866:A. praeuniversitatis
655:Animal Diversity Web
587:(suppl 1): 111–117.
211:, also known as the
2674:Mammals of Paraguay
367:Schistosoma mansoni
44:Conservation status
2389:Nectomys squamipes
2359:Nectomys squamipes
710:Nectomys squamipes
635:10.1007/BF00605896
497:Laboratory Animals
394:Vieira et al. 2016
363:Nectomys squamipes
344:Nectomys squamipes
319:Nectomys squamipes
308:Nectomys squamipes
255:Nectomys squamipes
208:Nectomys squamipes
193:Nectomys squamipes
36:Nectomys squamipes
2669:Rodents of Brazil
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2567:Open Tree of Life
2351:Taxon identifiers
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759:Species of tribe
690:978-0-8018-8221-0
534:Mammalian Species
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272:Nectomys squamipe
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175:N. squamipes
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27:Species of rodent
16:(Redirected from
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1950:O. longicaudatus
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998:D. albimaculatus
948:C. maracajuensis
827:A. galapagoensis
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683:. p. 1133.
679:(3rd ed.).
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1384:M. transitorius
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2172:R. primigenus
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2167:
2165:
2163:
2162:
2156:
2150:
2149:
2145:
2144:
2142:
2140:
2139:
2138:Pseudoryzomys
2134:
2128:
2127:
2122:
2121:
2119:
2117:
2116:
2110:
2104:
2103:
2102:O. peninsulae
2099:
2097:
2096:
2095:O. palustris
2092:
2090:
2089:
2084:
2082:
2081:
2077:
2075:
2074:
2073:O. dimidiatus
2070:
2068:
2067:
2063:
2061:
2060:
2059:O. antillarum
2055:
2053:
2052:
2051:O. albiventer
2048:
2047:
2045:
2043:
2042:
2037:
2031:
2030:
2026:
2025:
2023:
2021:
2020:
2015:
2009:
2008:
2003:
2001:
2000:
1996:
1994:
1993:
1992:O. stramineus
1989:
1987:
1986:
1982:
1980:
1979:
1975:
1973:
1972:
1968:
1966:
1965:
1961:
1959:
1958:
1954:
1952:
1951:
1947:
1945:
1944:
1940:
1938:
1937:
1936:O. fulvescens
1933:
1931:
1930:
1926:
1924:
1923:
1922:O. flavescens
1919:
1917:
1916:
1915:O. destructor
1912:
1910:
1909:
1908:O. chacoensis
1905:
1903:
1902:
1898:
1896:
1895:
1891:
1889:
1888:
1884:
1883:
1881:
1879:
1878:
1873:
1867:
1866:
1865:O. trinitatis
1862:
1860:
1859:
1855:
1853:
1852:
1848:
1846:
1845:
1841:
1839:
1838:
1834:
1832:
1831:
1827:
1825:
1824:
1820:
1818:
1817:
1813:
1811:
1810:
1806:
1804:
1803:
1799:
1797:
1796:
1792:
1790:
1789:
1785:
1783:
1782:
1778:
1776:
1775:
1774:O. catherinae
1771:
1769:
1768:
1764:
1762:
1761:
1760:O. auyantepui
1757:
1756:
1754:
1752:
1751:
1746:
1740:
1739:
1734:
1733:
1731:
1729:
1728:
1722:
1716:
1715:
1711:
1709:
1708:
1704:
1702:
1701:
1697:
1695:
1694:
1693:N. indefessus
1689:
1687:
1686:
1681:
1680:
1678:
1676:
1675:
1670:
1664:
1663:
1659:
1657:
1656:
1655:N. pectoralis
1652:
1650:
1649:
1645:
1643:
1642:
1638:
1636:
1635:
1634:N. meridensis
1631:
1629:
1628:
1624:
1622:
1621:
1617:
1615:
1614:
1610:
1608:
1607:
1603:
1601:
1600:
1596:
1594:
1593:
1589:
1587:
1586:
1585:N. auriventer
1582:
1580:
1579:
1575:
1574:
1572:
1570:
1569:
1564:
1558:
1557:
1553:
1551:
1550:
1546:
1544:
1543:
1539:
1537:
1536:
1532:
1530:
1529:
1525:
1524:
1522:
1520:
1519:
1514:
1508:
1507:
1503:
1501:
1500:
1496:
1494:
1493:
1489:
1487:
1486:
1482:
1480:
1479:
1475:
1473:
1472:
1468:
1466:
1465:
1461:
1459:
1458:
1454:
1453:
1451:
1449:
1448:
1443:
1437:
1436:
1432:
1431:
1429:
1427:
1426:
1421:
1415:
1414:
1410:
1408:
1407:
1406:M. altissimus
1403:
1402:
1400:
1398:
1397:
1392:
1386:
1385:
1381:
1380:
1378:
1376:
1375:
1370:
1364:
1363:
1359:
1357:
1356:
1355:M. robustulus
1352:
1350:
1349:
1345:
1344:
1342:
1340:
1339:
1334:
1328:
1327:
1322:
1320:
1319:
1314:
1312:
1311:
1306:
1304:
1303:
1302:M. curazensis
1298:
1296:
1295:
1290:
1289:
1287:
1285:
1284:
1278:
1272:
1271:
1267:
1266:
1264:
1262:
1261:
1256:
1250:
1249:
1245:
1243:
1242:
1238:
1236:
1235:
1234:H. perenensis
1231:
1229:
1228:
1224:
1222:
1221:
1217:
1215:
1214:
1210:
1208:
1207:
1203:
1202:
1200:
1198:
1197:
1192:
1186:
1185:
1181:
1179:
1178:
1174:
1172:
1171:
1167:
1166:
1164:
1162:
1161:
1156:
1150:
1149:
1148:H. saturatior
1145:
1143:
1142:
1138:
1136:
1135:
1131:
1129:
1128:
1124:
1122:
1121:
1117:
1115:
1114:
1110:
1108:
1107:
1103:
1101:
1100:
1096:
1095:
1093:
1091:
1090:
1085:
1079:
1078:
1074:
1072:
1071:
1067:
1065:
1064:
1060:
1058:
1057:
1053:
1051:
1050:
1046:
1044:
1043:
1039:
1038:
1036:
1034:
1033:
1028:
1022:
1021:
1017:
1016:
1014:
1012:
1011:
1006:
1000:
999:
995:
994:
992:
990:
989:
984:
978:
977:
973:
971:
970:
966:
964:
963:
959:
957:
956:
952:
950:
949:
945:
943:
942:
938:
936:
935:
931:
930:
928:
926:
925:
920:
914:
913:
908:
907:
905:
903:
902:
896:
890:
889:
885:
884:
882:
880:
879:
878:Amphinectomys
874:
868:
867:
862:
860:
859:
854:
853:
851:
849:
848:
842:
836:
835:
831:
829:
828:
824:
823:
821:
819:
818:
813:
807:
806:Sigmodontinae
803:
801:
797:
795:
791:
789:
785:
783:
779:
777:
773:
772:
769:
765:
754:
749:
747:
742:
740:
735:
734:
731:
723:
719:
718:
713:
711:
704:
700:
696:
692:
686:
682:
678:
677:
672:
671:Wilson, D. E.
668:
664:
663:Musser, G. G.
660:
656:
652:
648:
644:
640:
636:
632:
628:
624:
618:
614:
610:
605:
600:
595:
590:
586:
582:
578:
572:
568:
567:2027.42/56303
564:
560:
555:
551:
547:
543:
539:
535:
530:
526:
522:
518:
514:
510:
506:
502:
498:
493:
492:
485:
482:
474:
471:December 2020
464:
460:
454:
453:
447:
442:
433:
432:
426:
419:
414:
411:
407:
402:
399:
395:
390:
388:
386:
382:
376:
374:
372:
368:
364:
357:
355:
351:
347:
345:
338:
336:
332:
325:
323:
320:
313:
311:
309:
305:
297:
295:
288:
286:
283:
279:
277:
273:
269:
265:
260:
259:Sigmodontinae
256:
249:
247:
245:
241:
237:
233:
230:. It is from
229:
226:
222:
218:
214:
210:
209:
196:
194:
188:
185:
184:Binomial name
181:
177:
176:
171:
168:
167:
164:
163:
159:
156:
155:
152:
151:Sigmodontinae
149:
146:
145:
142:
139:
136:
135:
132:
129:
126:
125:
122:
119:
116:
115:
112:
109:
106:
105:
102:
99:
96:
95:
92:
89:
86:
85:
80:
75:
71:
65:
60:
59:Least Concern
49:
45:
40:
37:
33:
30:
19:
2596:
2358:
2329:
2308:
2301:
2293:Zygodontomys
2291:
2279:
2274:T. bolivaris
2272:
2262:
2250:
2240:
2230:S. aphrastus
2228:
2221:
2211:
2199:
2192:
2182:
2170:
2159:
2146:
2136:
2124:
2113:
2100:
2094:
2086:
2078:
2071:
2064:
2057:
2049:
2039:
2029:O. balneator
2027:
2017:
2005:
1997:
1990:
1985:O. rupestris
1983:
1976:
1969:
1962:
1955:
1948:
1943:O. griseolus
1941:
1934:
1927:
1920:
1913:
1906:
1899:
1892:
1885:
1877:Oligoryzomys
1875:
1863:
1856:
1849:
1844:O. speciosus
1842:
1835:
1828:
1821:
1814:
1807:
1800:
1795:O. flavicans
1793:
1786:
1779:
1772:
1765:
1758:
1748:
1738:N. vespuccii
1736:
1725:
1712:
1705:
1698:
1691:
1683:
1672:
1662:N. pirrensis
1660:
1653:
1646:
1639:
1632:
1625:
1618:
1611:
1604:
1597:
1592:N. caracolus
1590:
1583:
1576:
1566:
1556:N. squamipes
1555:
1554:
1547:
1540:
1533:
1526:
1516:
1504:
1497:
1490:
1483:
1476:
1469:
1462:
1455:
1445:
1433:
1423:
1411:
1404:
1396:Microryzomys
1394:
1382:
1372:
1360:
1353:
1346:
1336:
1324:
1318:M. georginae
1316:
1308:
1300:
1292:
1281:
1268:
1258:
1246:
1239:
1232:
1225:
1218:
1211:
1204:
1194:
1182:
1177:H. chacarius
1175:
1168:
1158:
1146:
1141:H. rostratus
1139:
1132:
1127:H. melanotis
1125:
1118:
1111:
1104:
1097:
1087:
1075:
1068:
1061:
1054:
1047:
1040:
1032:Euryoryzomys
1030:
1018:
1010:Eremoryzomys
1008:
996:
986:
974:
969:C. subflavus
967:
960:
953:
946:
941:C. langguthi
939:
932:
922:
910:
901:Carletonomys
899:
886:
876:
864:
856:
847:Agathaeromys
845:
832:
825:
815:
721:
715:
709:
675:
654:
626:
622:
584:
580:
558:
536:(265): 1–5.
533:
500:
496:
477:
468:
449:
413:
401:
371:N. squamipes
370:
366:
362:
361:
352:
348:
343:
342:
333:
329:
318:
317:
307:
303:
301:
292:
282:N. squamipes
281:
280:
271:
263:
254:
253:
220:
216:
212:
207:
206:
205:
192:
190:
174:
173:
161:
35:
29:
2450:iNaturalist
2383:Wikispecies
2310:Z. brunneus
2194:S. melanops
2019:Oreoryzomys
1978:O. nigripes
1964:O. microtis
1894:O. arenalis
1851:O. superans
1816:O. phaeotis
1809:O. paricola
1788:O. concolor
1674:Nesoryzomys
1648:N. nimbosus
1542:N. palmipes
1528:N. apicalis
1506:N. tenuipes
1499:N. spinosus
1435:M. hammondi
1294:M. audreyae
1248:H. yunganus
1213:H. laticeps
1184:H. sciureus
1134:H. rhabdops
1120:H. intectus
1113:H. fuscatus
1106:H. chapmani
1089:Handleyomys
1077:E. russatus
1042:E. emmonsae
988:Drymoreomys
955:C. marinhus
858:A. donovani
804:Subfamily:
763:(rice rats)
761:Oryzomyini
463:introducing
250:Description
246:ecoregion.
147:Subfamily:
2643:Categories
2612:Q109646712
2252:S. angouya
2242:Sooretamys
2148:P. simplex
2126:P. nivalis
2115:Pennatomys
2088:O. nelsoni
2080:O. gorgasi
1999:O. vegetus
1971:O. moojeni
1929:O. fornesi
1901:O. brendae
1887:O. andinus
1837:O. rutilus
1830:O. roberti
1802:O. mamorae
1781:O. cleberi
1767:O. bicolor
1727:Noronhomys
1714:N. swarthi
1685:N. darwini
1620:N. levipes
1568:Nephelomys
1535:N. grandis
1485:N. paracou
1478:N. musseri
1471:N. minutus
1464:N. guianae
1457:N. dubosti
1413:M. minutus
1362:M. zunigae
1270:L. molitor
1227:H. oniscus
1206:H. acritus
1160:Holochilus
1099:H. alfaroi
1070:E. nitidus
1056:E. legatus
934:C. goytaca
924:Cerradomys
888:A. savamis
817:Aegialomys
800:Cricetidae
604:1807/56919
446:references
377:References
141:Cricetidae
2223:S. alfari
2066:O. couesi
2007:O. victus
1641:N. moerex
1613:N. keaysi
1606:N. devius
1599:N. childi
1549:N. rattus
1492:N. pictus
1338:Melanomys
1326:M. luciae
1283:Megalomys
1196:Hylaeamys
1020:E. polius
962:C. scotti
912:C. cailoi
774:Kingdom:
304:Tyto alba
298:Predation
268:hypsodont
232:Argentina
169:Species:
97:Kingdom:
91:Eukaryota
2654:Nectomys
2606:Wikidata
2520:13000731
2468:10595053
2374:Q1770124
2368:Wikidata
2184:Scolomys
2161:Reigomys
2041:Oryzomys
1518:Nectomys
1447:Neacomys
1425:Mindomys
1260:Lundomys
1241:H. tatei
1049:E. lamia
976:C. vivoi
798:Family:
794:Rodentia
788:Mammalia
782:Chordata
780:Phylum:
776:Animalia
699:62265494
643:11108912
623:Genetica
613:17308757
525:36149115
339:Behavior
264:Nectomys
240:Paraguay
162:Nectomys
137:Family:
131:Rodentia
121:Mammalia
111:Chordata
107:Phylum:
101:Animalia
87:Domain:
64:IUCN 3.1
2626:9483947
2559:1610075
2507:1002596
2442:5219856
2429:1179937
1750:Oecomys
792:Order:
786:Class:
550:3503779
517:8938625
459:improve
228:species
157:Genus:
127:Order:
117:Class:
62: (
2585:236805
2572:885389
2481:633159
1823:O. rex
697:
687:
641:
611:
548:
523:
515:
448:, but
276:pelage
238:, and
236:Brazil
225:rodent
2546:85768
2533:29117
2494:14475
2463:IRMNG
2455:44771
2416:6S7HG
2403:73341
669:. In
639:S2CID
546:JSTOR
521:S2CID
219:, or
2621:GBIF
2554:OBIS
2528:NCBI
2489:IUCN
2476:ITIS
2437:GBIF
2398:BOLD
722:2016
695:OCLC
685:ISBN
609:PMID
513:PMID
314:Diet
2515:MSW
2502:MDD
2424:EoL
2411:CoL
631:doi
599:hdl
589:doi
585:101
563:hdl
538:doi
505:doi
2645::
2623::
2608::
2582::
2569::
2556::
2543::
2530::
2517::
2504::
2491::
2478::
2465::
2452::
2439::
2426::
2413::
2400::
2385::
2370::
720:.
714:.
693:.
653:.
637:.
627:63
625:.
607:.
597:.
583:.
579:.
561:.
544:.
519:.
511:.
501:30
499:.
384:^
234:,
215:,
2334:"
2330:"
2328:†
2169:†
2158:†
2123:†
2112:†
2085:†
2056:†
2004:†
1735:†
1724:†
1690:†
1682:†
1323:†
1315:†
1307:†
1299:†
1291:†
1280:†
909:†
898:†
863:†
855:†
844:†
752:e
745:t
738:v
712:"
708:"
701:.
657:.
645:.
633::
615:.
601::
591::
569:.
565::
552:.
540::
527:.
507::
484:)
478:(
473:)
469:(
455:.
420:.
408:.
396:.
66:)
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
