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Multimammate Mouse

Observada: 3 de octubre de 2009 Por: Robert Taylor
Sea Fish AtlasSeaKeys
Reputación de Robert Taylor en MammalsReputación de Robert Taylor en MammalsReputación de Robert Taylor en Mammals
rodents 054
rodents 065
rodents 060

Only caught at night in both grasslands and thicket (added as a separate record).

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Such a pity

You didn't keep records - body, tail length, underside pic, feet pic, etc?!

(I'd really like to count her nipples - if she's a she). Hell, that doesn't read so well ..!

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Unfortunatly not

It was a small project that we did in undergrad looking at giving-up-densities of foraging rodents. No one used the species data, I figured it shouldn't go to waste so posted it here. Sorry for the lack of morphometrics.

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Zoology 323

That is a module I never took. So I have no clue what 'giving-up-densities' are, but I am intrigued. Would you mind to briefly enlighten?


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Behavioral Ecology

The Giving-Up-Density (GUD) quantifies the amount of food that remains in a patch when a forager moves to a new patch. Shows the foraging preference of an animal/population/community and indicates the combined effects of habitat preference, predation risk and competition. Where a forager perceives it is safe it will likely have greater competition while in perceived unsafe areas are likely to have greater rewards due to lessened competition (it was all mixed up in Optimal Foraging Theory and Marginal Value Theory).
Trays of favoured food in a matrix (to make it difficult to forage e.g. sand, stone, or wire mesh) spread evenly across the study site (a grid reference representing each tray) can be used to map foraging preferences on arcGIS.
First used by Brown and Kotler who did several experiments on rodent foraging. They had an aviary to which they added 3 nocturnal rodent species. One species foraged in the open and the others under plant cover. They tossed in an owl, all species then foraged under cover. Then they pulled the owl out and tucked a snake under a bush and all the rodents fed in the open. They then tossed the owl back in…
It has since had some application in pest control and livestock safety where rhino poachers choose to forage...
We fed sunflower seeds to the rodents on the farm for several weeks to get them habituated to the trays then added sand matrix. We compared foraging behavior of rodents in burnt and unburnt grassland and burnt and unburnt thicket. Traps were just to see which species we were working with.

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