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Insect Quiz (RV) - IPY

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Elzet
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Re: Insect Quiz (RV)

Unread postby Elzet » Mon Sep 13, 2010 10:25 pm

Millipedes.
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Re: Insect Quiz (RV)

Unread postby Imberbe » Thu Sep 23, 2010 9:29 pm

Elzet. :thumbs_up:
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Re: Insect Quiz (RV)

Unread postby Elzet » Thu Sep 23, 2010 10:26 pm

:dance: :dance: :dance:
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onewithnature
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Re: Insect Quiz (RV)

Unread postby onewithnature » Fri Sep 24, 2010 3:30 am

Apparently there are several species that do this. :thumbs_up:
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Re: Insect Quiz (RV)

Unread postby Elzet » Mon Oct 04, 2010 9:55 pm

Honey bees are able to count landmarks. Tell me more about this, the sameness rule and bees learning the inverse concept.
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Elzet
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Re: Insect Quiz (RV)

Unread postby Elzet » Sun Oct 17, 2010 10:59 pm

:whistle:
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Re: Insect Quiz (RV)

Unread postby oddesy » Mon Oct 18, 2010 3:49 am

Interesting question!

It has been found that bees are able to count landmarks and can distinguish between 1, 2, 3 and 4 however seem unable to comprehend greater numbers and 4 not so well. Scientists believe that being able to count assists the bees with navigation as when foraging they can move several kilometers away, thus being able to recognize landmarks would help them navigate more easily.

Bees have been shown to develop rules of sameness as well as the inverse concept. Basically what the sameness concept involves is the fact that when bees are confronted with a specific pattern or set of stimuli that yield high quality rewards they are able to consecutively choose the same pattern even if the set of stimuli is changed. So basically they are able to memorize the pattern.

The inverse concept is the complete opposite, where bees learn to choose the pattern that was not the sample, so they choose the odd one out, usually if the sample was of low reward quality. This has then been expanded to suggest that bees are capable of remembering individual human faces.

:shock: such amazing little animals! :dance: to think that insects have this kind of cognitive ability. For the past couple of weeks i have been doing a study on something very similar where we looked at the ability of the bees to make foraging decisions based on the flower color, reward quality and handling time associated with the flower. And we have some very nice results and they clearly show that bees are indeed capable of making decisions whether you argue this is on a conscious or sub-conscious level

Great Q E :thumbs_up:
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Re: Insect Quiz (RV)

Unread postby onewithnature » Mon Oct 18, 2010 9:08 am

Wonderful, and fascinating, info, Oddesy! :clap: :clap: I think we know so little about the wonders of nature that, as we discover more and more amazing things, we are filled with wonder and appreciation.
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Re: Insect Quiz (RV)

Unread postby Elzet » Mon Oct 18, 2010 9:41 pm

Sharp as a needle, Ods. :clap: :clap: :dance: :dance: And yes, indeed fab info coming through. Will look at bees a bit differently in future.


oddesy wrote:This has then been expanded to suggest that bees are capable of remembering individual human faces.


:shock: :big_eyes:
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Re: Insect Quiz (RV)

Unread postby oddesy » Mon Oct 18, 2010 10:05 pm

Thanks OWN, E :thumbs_up: :thumbs_up:

They are fascinating creatures! even if I did get stung twice at the same time and discover i am now allergic to bees :wall: :lol:

Ok sticking with bees: A bee like any other foraging animal is faced with decisions when it is out searching for food. Each decision leads to varying consequences in terms of their survival or reproductive ability.The primary principle behind foraging behavior is the idea of optimality. This means that each decision made by the forager involves costs and benefits and these need to be weighed up in order to result in the greatest fitness to the hive (most reward). Tell me about foraging bees and the relationship between the weight they will carry and flight and how scientists went about determining this.
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Elzet
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Re: Insect Quiz (RV)

Unread postby Elzet » Mon Oct 18, 2010 10:49 pm

Ods, so sorry to hear that you are allergic. So am I. And I'm sure bees are clever enough to know that too. :roll: :|


One of the striking features of honeybee foraging is the regulation of crop filling. When a foraging bee collects nectar from a food source that provides limited flow rate of sucrose solution, it does not fully fill the crop with nectar. Instead, it returns to the hive with the crop partially filled (Kacelnik et al. 1986; Kremer 1981; et al). This observation led to different hypotheses about the economics of honeybee foraging.

Moreover, Balderrama et al. (1992) found no clear dependence between metabolic rate and the load carried during the visit.

The hypothesis that it is the increased reward, not the heavier carried
crop load, which is the cause of the metabolic rate increase. With this purpose in mind, the metabolic rate of free flying individual foraging bees was measured with improved accuracy, sensitivity and time resolution.

Scientific device: respirometric chamber

http://www.springerlink.com/content/el7 ... lltext.pdf
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oddesy
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Re: Insect Quiz (RV)

Unread postby oddesy » Wed Oct 20, 2010 4:18 pm

:thumbs_up: :clap: Great Info, The paper I based my answer on looked at the relationship from the perspective that increased crop filling increases the energetic costs of flight which therefore means that increasing the distance from the hive results in a smaller load to maintain the most reward on cost. But that study does seem to make sense and i cant find anything wrong with their methodology!, very interesting, thanks E :thumbs_up: :thumbs_up:

Your IT :thumbs_up:
The beginning of knowledge is the discovery of something we do not understand.

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Elzet
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Re: Insect Quiz (RV)

Unread postby Elzet » Wed Oct 20, 2010 9:14 pm

Tx for allowing the other side of the coin, Ods.


I see Bosmama is around. I think she should take IT away. :twisted: :thumbs_up: :thumbs_up:
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Re: Insect Quiz (RV)

Unread postby Imberbe » Thu Nov 04, 2010 11:22 pm

First to post is IT!
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparksvolunteers.org


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oddesy
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Re: Insect Quiz (RV)

Unread postby oddesy » Fri Nov 05, 2010 9:00 am

As you all know mammals and birds are endotherms and creatures like shrews and humming birds are considered the limit to body size in those groups yet insects like some sphinx and hawk moths are considered temporal endotherms (This means that they act as ectotherms for some of the time and are endothermic at some point in time) and weigh less than either of those animals at <1g.

1:When do they act as endotherms, why and how do they achieve this?
2: what anatomical/physiological adaptation allows these insects to have a body size significantly smaller than mammals and still function as endotherms some of the time?
The beginning of knowledge is the discovery of something we do not understand.

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