The best way for dinosaurs to not escape is to make them have enough room.
In isla Matenceros, there are no storms and blue skies, so it will help to focus on dinosaur requirements.
Like your triceratops, if you have a triceratops in your park, you could select that dinosaur and see their stats.
• Hunger
• Thirst
• Comfort (40%)
• Forest (631 m²)
• Grassland (2,418 m²)
• Wetland (0 m²)
• Social (1-6)
• Population (1-16)
The game will show you also what these requirements are in the information part of the dinosaur stats if you ever get confused.
So you need to build a big enough enclosure that the grassland need is met and not in the red. Once done, use the forest tool to fill the forest need, but the more forest need you meet with the forest tool, the less grassland the dinosaur will have. So you could either increase the size of the enclosure or use the scenery trees to add some forest without losing grassland.
Then the social and population, the triceratops could live happily with up to 5 other members of the family without issue, but you may see them square off from time to time. This means that they are either competing for the Alpha position or that they are at their social limit, so any more triceratops (like 7, 8, 9 etc), and they will start fighting each other and may attempt to breakout as their comfort gets lowered.
Population is one where you could make a mistake, it is what I sometimes miscalculate from time to time. The triceratops is comfortable with 16 dinosaurs, including herself, in her exhibit. So you could have for example: 4 triceratops, 6 Edmontosaurus, and 6 struthiomimus. 4+6+6=16.
But if you make additional dinosaurs, like 4 triceratops, 6 Edmontosaurus, and 8 struthiomimus. It will be 4+6+8=18. Which is greater than her population limit. She will not show it at first but she will get angry as her comfort level gets lower over time. When her comfort has reaches below 40%, then she is uncomfortable, and will attempt to break out. To fix this, you could either separate the dinosaurs into different exhibits, or sell some unwanted dinosaurs.
So when making mixed exhibits, get to know your dinosaurs before mixing them together. The struthiomimus has a population limit of 25, The edmontosaurus has a population limit of 25, and the triceratops has a population limit of 16. So if you wish to have these 3 together, you have to make sure the triceratops is happy as she is more likely to get uncomfortable due to overpopulation.
Later on, you will unlock more dinosaurs that have different requirements for exhibit sizes, trees, populations, and social. So I recommend in your first playthrough to separate the dinosaurs you incubated first and learn what they like and dislike, then you could group them together if they re compatible. Later on, dinosaurs like velociraptor require at least 2 members to be happy as they are pack animals, or the ankylosaurus could only be with 7 other dinosaurs as they dislike crowds.
I hope this helps!