What fruit/nut are the duiker eating?
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by luca-chimp
Does anybody know, what kind of tree with its fruits is so interesting for duiker, monkey and chimp?
Posted
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by LirSam scientist
It looks like Irvingia (or forest mango)
Posted
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by MimiA scientist, moderator
Thanks @LirSam!!! 😄
Posted
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by luca-chimp
Oh yes, thanks a lot! mhm forest mango sounds yummie 😃
Posted
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by luca-chimp
Ah, just read the wiki. Is the seed of irvingia the "nut" (dika) our chimps are hammering?
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by MimiA scientist, moderator
as far as I know the nut species chimps are known to crack are:
Coula edulis, Parinari excelsa, Panda oleosa, Sacoglottis gabonensis, Elaeis guineensis and Detarium senegalensis
http://www.sciencedirect.com/science/article/pii/S0047248484710207
and http://www.issr-journals.org/links/papers.php?journal=ijias&application=pdf&article=IJIAS-15-011-02Posted
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by luca-chimp
Ah okay. It was only a thought, because obviously all the animals like theese fruits, and in Wiki is cited: "The seed coat has to be cracked open to get to the endosperm. " So I thought, maybe this is what our chimps are hammering on. But as Im no biologist, I cannot recognize the nut trees they sit under 😃
Now I first have to google all the nuts and read the article 😃 Thanks MimiA
Posted
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by luca-chimp
@LirSam: Sorry for nagging. I need help: Wiki says: Irvingia flowers from March to June and has two fruiting seasons: from April to July and from September to October.
I searched long, as to find the beginning of the sequenceIt says: 03-12-2015
What does that mean? 3. December or 12th March? And both are not fitting in the above fruiting seasons?Posted
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by MimiA scientist, moderator
I jump in before @LirSam answers 😉
With nuts like this, usually the animals first eat the fruit and then the nuts/seeds dry on the forest floor and then are consumed later.
For example, Parinari fruit are eaten in January (https://books.google.de/books?id=t7YhAwAAQBAJ&pg=PA185&lpg=PA185&dq=chimpanzee+parinari+fruit&source=bl&ots=R_qnD9B3GQ&sig=Eorf6RQF8XnHsxvZqsqjvqQnCp8&hl=en&sa=X&ved=0ahUKEwjT3q-59rnNAhVKD8AKHerXDX4Q6AEIJDAB#v=onepage&q=chimpanzee parinari fruit&f=false)
but the parinari nuts are cracked from June to October (http://www.eva.mpg.de/fileadmin/content_files/staff/boesch/pdf/behav_optim_nut-cracking.pdf)
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by LirSam scientist
Hey @luca-chimp!
first feel free to ask as many questions, no problemto add on to @MimiA
the chimps do feed on the Irvingia nuts but they do not use tools to crack the shell open. they just use their teeth.
second, about the fruiting season. I am not at all a botanist but I have already seen chimps feeding on Irvingia fruits in March and on other cases feeding on the nuts in January. Fruiting seasons can shift quite a bit, I assume depending on rainfall, sun exposure etc.. So it is not impossible 😃hope it helped!
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by AnLand moderator
To answer the date question - it's an American format MM-DD-YYYY (month - day - year), so it's March 12th, 2015
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by luca-chimp
Thanks at all! Yes, march may be the first of the fruits 😃 Lucky whose teeth are strong enough
@AnLand, what me confused with the time is, that sometimes there are other forms: I see most of the time the other way round, perhaps 2015-12-3 and so I was quite unsure, which format is meant.Posted