{"id":468,"date":"2017-04-20T20:04:50","date_gmt":"2017-04-20T23:04:50","guid":{"rendered":"https:\/\/neoprego.wordpress.com\/?p=468"},"modified":"2017-04-20T20:04:50","modified_gmt":"2017-04-20T23:04:50","slug":"news-from-the-field-novidades-do-campo","status":"publish","type":"post","link":"https:\/\/www.neoprego.org\/pt_br\/news-from-the-field-novidades-do-campo\/","title":{"rendered":"News from the field | Novidades do campo"},"content":{"rendered":"
[texto em portugu\u00eas abaixo]<\/h6>\n

Field work can be surprising. Usually\u00a0in\u00a0good way, but occasionally\u00a0(more often than we would like) in bad ways. Even with all preparation, sometimes random and unexpected problems happens. In the case of field experiments<\/em>, the\u00a0unpredictability is multiplied by two or three!<\/p>\n

In the last field work at Serra da Capivara<\/a> we had a simple primary\u00a0aim: to give capuchin monkeys some oil palm nuts (Elaeis guineensis<\/em>) and let them crack those open with stones tools from different origins and materials, to then analyse the wear marks. Simple stuff for capuchin monkeys that use stones for\u00a0several\u00a0purposes like the Serra da Capivara population.<\/p>\n

As sometimes happen, we did not account for \"Falotico_T-9755\"
\nthe resolve\u00a0of the monkeys. When we presented the nuts, first intact and then already open, the monkeys examined, tasted the kernel, and even cracked open some, but after that, simply ignored the new food….. completely\u00a0disregard for\u00a0those oil nuts.<\/p>\n

We tried a few more times, but after some other monkeys attempt on tasting the nuts, it was clear to us\u00a0that those\u00a0monkeys do not like oil\u00a0palm nuts. As a field primatologist, I had to try the nuts, and I must\u00a0agree with the monkeys, those nuts are NOT good. They are bitter, maybe because of the oil. The other palm nuts capuchin monkeys crack and eat (eg. genus\u00a0Attalea<\/em> and Syagrus<\/em> nuts) are very tasty (yes, I ate\u00a0those as well).<\/p>\n

As we could not convince or force the monkeys to crack those nuts open, we choose an alternative plan, and return to S\u00e3o Paulo, hoping to do a modified version of the experiment with another\u00a0\"IMG_1947\"palm nut (Syagrus romanzoffiana<\/em>) and a group of capuchin monkey that we already knew beforehand processed this resource with stone tools.\u00a0\u00a0The group mentioned lives at\u00a0the Tiet\u00ea Ecological Park<\/a>, the first capuchin group that I worked with several years ago.<\/p>\n

\"Falotico_T-9662\"
Capuchin monkey cracking nut<\/figcaption><\/figure>\n

These semi-free ranging capuchins live on an urban park, and they were some of the first non-captive capuchins reported to spontaneous use stone tools.<\/p>\n

It is being interesting to work with those monkeys after so many years without visiting them. Lets hope they still like to nutcrack a lot!<\/p>\n

\n

—————————————————————————————————————————————–<\/p>\n

Trabalho de campo pode ser surpreendente. Muitas vezes de forma positiva, mas algumas vezes (mais do que gostar\u00edamos) de modo negativo. Mesmo com todo o planejamento, algumas vezes problemas aleat\u00f3rios e inesperados acontecem. E no caso de experimentos de campo<\/em>, o imprevisto\u00a0acontece em dobro ou triplo!<\/p>\n

No \u00faltimo trabalho de campo na Serra da Capivara<\/a> n\u00f3s t\u00ednhamos um simples objetivo prim\u00e1rio: dar aos macacos-prego alguns cocos de dend\u00ea (Elaeis guineensis<\/em>) e deixar que que eles os quebrassem com ferramentas de pedras de diferentes origens e materiais, para posteriormente analisar as marcas de uso. Coisa simples para macacos-prego que usam pedras para v\u00e1rios prop\u00f3sitos como a popula\u00e7\u00e3o da Serra da Capivara.<\/p>\n

Como as vezes acontece, n\u00e3o cont\u00e1vamos com a vontade dos macacos. Quando expostos aos cocos, primeiro intactos e depois j\u00e1 abertos, at\u00e9 chegaram a experimentar e quebrar alguns, mas depois simplesmente ignoraram o novo alimento…. completa indiferen\u00e7a pelos cocos de dend\u00ea.<\/p>\n

Tentamos mais algumas vezes, mas ap\u00f3s outros macacos experimentarem os cocos, estava claro para n\u00f3s que eles n\u00e3o gostaram dos cocos de dend\u00ea. Como um primat\u00f3logo de campo, eu tinha que\u00a0experimentar os cocos, e preciso dizer que concordo com os macacos, aqueles cocos N\u00c3O s\u00e3o bons. S\u00e3o amargos, talvez por causa do \u00f3leo presente no fruto. Os outros cocos que os macacos-prego quebram e comem (p.ex. cocos do g\u00eanero\u00a0Attalea<\/em> and Syagrus<\/em>) s\u00e3o bem saborosos (sim, eu comi esses tamb\u00e9m).<\/p>\n

Como n\u00e3o podemos convencer ou for\u00e7ar os macacos a quebrar aqueles cocos, escolhemos um plano alternativo, e retornamos \u00e0 S\u00e3o Paulo, esperando fazer um vers\u00e3o modificado do experimento com outro coco, o jeriv\u00e1 (Syagrus romanzoffiana<\/em>) e um grupo de macacos-prego que sab\u00edamos que processam esse recurso com ferramentas de pedra. O grupo em quest\u00e3o vive no\u00a0Tiet\u00ea Ecological Park<\/a>, o primeiro grupo de macacos-prego com qual trabalhei muitos anos atr\u00e1s.<\/p>\n

\"Researcher
Researcher Tiago Fal\u00f3tico observing a capuchin monkey cracking nuts<\/figcaption><\/figure>\n

Esses macacos semi-livres vivem em um parque urbano, e foram alguns dos primeiros macacos-prego n\u00e3o-cativos que foram registrados usando ferramentas de pedra espontaneamente.<\/p>\n

Est\u00e1 sendo interessante trabalhar novamente com esses macacos ap\u00f3s tantos anos sem visita-los. Esperamos que eles ainda gostem muito de quebrar cocos!<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Field work can be surprising.<\/p>","protected":false},"author":1,"featured_media":629,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4,16],"tags":[],"class_list":["post-468","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-field","category-serra-da-capivara"],"jetpack_featured_media_url":"https:\/\/www.neoprego.org\/wp-content\/uploads\/2017\/04\/falotico_t-9531-e1492724866278-scaled.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/posts\/468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/comments?post=468"}],"version-history":[{"count":0,"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/posts\/468\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/media\/629"}],"wp:attachment":[{"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/media?parent=468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/categories?post=468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.neoprego.org\/pt_br\/wp-json\/wp\/v2\/tags?post=468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}