The eggs

OK, so I'm going to set aside the whole thing about a cryptozoologist who isn't interested in studying an undiscovered species, and is hell-bent on driving the last remaining dinosaurs on earth to extinction, despite what it would mean for science...

My question is: If there are fertilized Nessie eggs hatching in a nest, wouldn't there have to be a male plesiosaur somewhere?

Was this plot hole possibly left open to give the producers the option of a sequel if this movie had been successful? Or was it just bad filmmaking (like the rest of the film)?