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Crocodile confession: Meat-eating predators occasionally eat fruit

Date:
August 21, 2013
Source:
Wildlife Conservation Society
Summary:
A new study led by the Wildlife Conservation Society says that the American alligator and a dozen other crocodile species enjoy an occasional taste of fruit along with their normal meat-heavy diets of mammals, birds, and fish.

Please pass the fruit. A new study says American alligators (pictured) and 12 other crocodilians consume fruit, in addition to their usual meat heavy diets.
Credit: Phillip "Scooter" Trosclair

It turns out that alligators do not live on meat alone. Neither do Nile crocodiles. A new study led by the Wildlife Conservation Society says that the American alligator and a dozen other crocodile species enjoy an occasional taste of fruit along with their normal meat-heavy diets of mammals, birds, and fish.

The study gives new insight into the possible role that crocodilians, some of which have large territories, may play in forest regeneration through digesting and passing seeds from fruits.

The study appears in the July issue of the Journal of Zoology. Authors include: Steven Platt of the Wildlife Conservation Society; Ruth M. Elsey of the Louisiana Department of Wildlife and Fisheries; Hong Liu of Florida International University and the Fairchild Tropical Botanic Garden; Thomas R. Rainwater of the U.S. Fish and Wildlife Service; James C. Nifong of the University of Florida; Adam E. Rosenblatt and Michael R. Heithaus of Florida International University; and Frank J. Mazzotti of University of Florida.

The authors looked at 18 species of crocodilian ranging from the American alligator to the fearsome Nile crocodile and found 13 of the species consumed some form of fruit including a variety of berries, legumes, nuts, and grains.

While the authors say some of the fruit ingestion may have been incidental to prey capture, evidence shows that other fruit is consumed deliberately and in large quantities. Much remains to be learned about how crocodilians process carbohydrates and other plant-based nutrients, though studies suggests that fruit eating is likely to yield nutritional rewards for crocodilians.

"Although underreported, fruit eating appears widespread among crocodilians," said the study's lead author, Steven Platt of the Wildlife Conservation Society. "Given the biomass of crocodiles in many subtropical and tropical wetlands and their capacity for ingesting large numbers of fruits, we consider it likely that crocodilians function as significant seed dispersal agents in many freshwater ecosystems."


Story Source:

The above story is based on materials provided by Wildlife Conservation Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. S. G. Platt, R. M. Elsey, H. Liu, T. R. Rainwater, J. C. Nifong, A. E. Rosenblatt, M. R. Heithaus, F. J. Mazzotti. Frugivory and seed dispersal by crocodilians: an overlooked form of saurochory? Journal of Zoology, 2013; DOI: 10.1111/jzo.12052

Cite This Page:

Wildlife Conservation Society. "Crocodile confession: Meat-eating predators occasionally eat fruit." ScienceDaily. ScienceDaily, 21 August 2013. <www.sciencedaily.com/releases/2013/08/130821124333.htm>.
Wildlife Conservation Society. (2013, August 21). Crocodile confession: Meat-eating predators occasionally eat fruit. ScienceDaily. Retrieved September 23, 2014 from www.sciencedaily.com/releases/2013/08/130821124333.htm
Wildlife Conservation Society. "Crocodile confession: Meat-eating predators occasionally eat fruit." ScienceDaily. www.sciencedaily.com/releases/2013/08/130821124333.htm (accessed September 23, 2014).

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