MadSci Network: Zoology |
Hi Eric, Salt water crocs are pretty mean! In fact, a salt water crocodile is the *only* living animal that considers people to be on the menu. Given the chance, they'll grab you from the river bank and drown you; and eat you later. Across Northern Australia, crocs do move out of rivers and into the sea for a few different reasons. Naturally, the croc may encounter sharks of different species and sizes, but it is unlikely that either would engage each other. Sharks are attracted to blood in the water, and tend to take on easy targets. Crocodiles also prefer easy targets, and because they can slow their metabolism right down, so if conditions or prey is not "just right", they'll kick back and wait for better pickings tomorrow...or the next day; or even the next month. There's never any hurry to eat being a crocodile. However, if, by chance, a large tiger shark and a large crocodile did have a go at each other, I guess I'd still put my money on the croc. Having worked with crocs, I reckon the crocodile has better resources at its disposal. But it difficult to decide. Crocs are ambush predators (ie. sit and wait for an attack), sharks are opportunist predators that charge at targets. Sorry that I haven't answered your question directly. Crocodiles and sharks can occaisionaly move into each other's territory. But they are only visitors to each other's area and don't really "co-exist", as such. It is VERY unlikely that similar sized, healthy animals would take each other on, and even harder to predict the outcome. Big, male crocs (bulls) don't tolerate other male crocs in their areas and will often fight really really hard. But I think a large male croc would hardly bother with a shark entering his territory. Sharks, on the other hand, are much less territorial, and I doubt that they would seek to evict a travelling crocodile. Great Whites are extremely unlikely to ever encounter a crocodile - Great Whites live in temperate waters - crocodiles are tropical animals (they need warmth to get their muscles moving. They're very sluggish in cold weather). Tiger sharks may occaisionaly bounce into a croc, but I don't think they'd notice each other. Bull Sharks do sometimes work their way into estuaries (crocodile habitat), but I still feel that a crocodile would be more concerned with what his rival crocodiles are up to, and what is paddling along the bank (ie. possible food) than a shark in his river. Hope this helps. cheers, Alastair
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