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The Equivocal Relationship Between Territoriality and Scent Marking in Wild Saddleback Tamarins (Saguinus fuscicollis).

Lledo-Ferrer Y, Peláez F, Heymann EW - Int. J. Primatol. (2011)

Bottom Line: None of the predictions were confirmed.It appears that instead of defending a territory in the classic sense, the tamarins are optimizing signal transmission by depositing their scents where the probability of detection by neighbors is higher.ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10764-011-9516-9) contains supplementary material, which is available to authorized users.

View Article: PubMed Central - PubMed

ABSTRACT
Researchers have often assumed that scent marking serves a territorial function in callitrichines, although some controversy exists. To fulfill such a function, scent marks should 1) prevent intrusions, 2) ensure access to feeding resources, 3) enable avoidance of intergroup encounters, or 4) play an important role in the aggressive encounters between groups. We studied 13 saddleback tamarins (Saguinus fuscicollis) belonging to 3 free-ranging groups, which formed mixed-species troops with moustached tamarins (S. mystax) in the Amazonian rain forest of Peru. None of the predictions were confirmed. The tamarins used a border-marking strategy, marking more on the periphery of their territory. However, feeding trees in overlap and encounter areas received more scent marking but were still visited by neighboring groups. Intergroup encounters occurred more often than expected, and scent-marking frequency was not higher during them than when no other group was present. It appears that instead of defending a territory in the classic sense, the tamarins are optimizing signal transmission by depositing their scents where the probability of detection by neighbors is higher. Saddleback tamarins may use shared areas of their home ranges to exchange information with neighboring groups, perhaps regarding reproductive opportunities. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10764-011-9516-9) contains supplementary material, which is available to authorized users.

No MeSH data available.


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Distribution of scent-marking events (group 1).
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Fig2: Distribution of scent-marking events (group 1).

Mentions: We found an increase in SME in overlap areas vs. the exclusively used areas (Fig. 2; Table IV). Moreover, there was a significant interaction between sex and area (GLMM: F(1,8) = 16.48, p = 0.04), wherein females marked more than males in exclusive areas, whereas males marked more in overlap areas. The tamarins marked more in overlap areas than expected by the intensity of use (G1 2007: G = 56.29, df = 1, p < 0.001; G1 2008: G = 18.54, df = 1, p < 0.001; G2: G = 8.7, df = 1, p < 0.004; G3: G = 37.89, df = 1, p < 0.001). The intensity of scent marking was higher in overlap areas vs. exclusive areas. There was also a significant interaction between sex and area (GLMM: F(1,11) = 16.04, p = 0.002), with males marking more intensely in exclusive areas, whereas females marked more intensely in overlap areas.Fig. 2


The Equivocal Relationship Between Territoriality and Scent Marking in Wild Saddleback Tamarins (Saguinus fuscicollis).

Lledo-Ferrer Y, Peláez F, Heymann EW - Int. J. Primatol. (2011)

Distribution of scent-marking events (group 1).
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3139874&req=5

Fig2: Distribution of scent-marking events (group 1).
Mentions: We found an increase in SME in overlap areas vs. the exclusively used areas (Fig. 2; Table IV). Moreover, there was a significant interaction between sex and area (GLMM: F(1,8) = 16.48, p = 0.04), wherein females marked more than males in exclusive areas, whereas males marked more in overlap areas. The tamarins marked more in overlap areas than expected by the intensity of use (G1 2007: G = 56.29, df = 1, p < 0.001; G1 2008: G = 18.54, df = 1, p < 0.001; G2: G = 8.7, df = 1, p < 0.004; G3: G = 37.89, df = 1, p < 0.001). The intensity of scent marking was higher in overlap areas vs. exclusive areas. There was also a significant interaction between sex and area (GLMM: F(1,11) = 16.04, p = 0.002), with males marking more intensely in exclusive areas, whereas females marked more intensely in overlap areas.Fig. 2

Bottom Line: None of the predictions were confirmed.It appears that instead of defending a territory in the classic sense, the tamarins are optimizing signal transmission by depositing their scents where the probability of detection by neighbors is higher.ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10764-011-9516-9) contains supplementary material, which is available to authorized users.

View Article: PubMed Central - PubMed

ABSTRACT
Researchers have often assumed that scent marking serves a territorial function in callitrichines, although some controversy exists. To fulfill such a function, scent marks should 1) prevent intrusions, 2) ensure access to feeding resources, 3) enable avoidance of intergroup encounters, or 4) play an important role in the aggressive encounters between groups. We studied 13 saddleback tamarins (Saguinus fuscicollis) belonging to 3 free-ranging groups, which formed mixed-species troops with moustached tamarins (S. mystax) in the Amazonian rain forest of Peru. None of the predictions were confirmed. The tamarins used a border-marking strategy, marking more on the periphery of their territory. However, feeding trees in overlap and encounter areas received more scent marking but were still visited by neighboring groups. Intergroup encounters occurred more often than expected, and scent-marking frequency was not higher during them than when no other group was present. It appears that instead of defending a territory in the classic sense, the tamarins are optimizing signal transmission by depositing their scents where the probability of detection by neighbors is higher. Saddleback tamarins may use shared areas of their home ranges to exchange information with neighboring groups, perhaps regarding reproductive opportunities. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s10764-011-9516-9) contains supplementary material, which is available to authorized users.

No MeSH data available.


Related in: MedlinePlus