Abstract

GONZALEZ-SOLORZANO, Mariana; GOMEZ-TORRES, Monserrat A.; LOPEZ-LUNA, Marco A.  and  ESCOBEDO-GALVAN, Armando H.. Saurochory in crocodiles does not favor seed dispersai and viability. Acta biol.Colomb. [online]. 2022, vol.27, n.1, pp.131-134.  Epub Feb 18, 2022. ISSN 0120-548X.  https://doi.org/10.15446/abc.v27n1.88615.

Seed dispersal by reptiles (saurochory) has recently received attention, and the consumption of fruits and seeds has been reported in crocodilians despite being mainly carnivores, acting as potential seed dispersers. We evaluate whether saurochory by Crocodylus acutus and C. moreletii affect the seed viability of three species of plants (Delonix regia, Inga sp., and Citrullus lanatus). We performed feeding trials, using three juvenile individuals of each species of crocodile, and fed them 22 seeds per plant species for a total of 66 seeds per enclosure (132 for both species). Seeds were combined with the usual diet each week. The unconsumed and excreted seeds were collected and planted in soil treated with compost to evaluate the relative germination rate. A total of 99 seeds were consumed, of which only 14 seeds of C. lanatus were recovered from the faeces, and only one of those germinated (7.14 %) with respect to 50 % in the control group. The results indicate that saurochory by C. acutus and C. moreletii has a negative effect on seed viability and germination of the plant species studied, as found in other studies using different species.

Keywords : Crocodylia; endozoochory; frugivory; plant-animal interaction; Reptilia.

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