Aquatic ecology and Biodiversity

Unit 3- Population ecology

3.17. Population interactions
Main population interactions are

• Symbiosis – None of the partner affected
• Competition – Both partners inhabited (Paramecium)
• Predation – Predator benefited, prey is harmed (Loin and Deer)
• Parasitism – Parasite benefited, host harmed (Ascaris and Mary)
• Commensalism – One partner benefitted other partner is neither harmed nor benefitted (Shark and sucker fish)
• Mutualism – Both partners are benefitted. Eg: Hermit crab and sea anemone
  

Types of interactions
1) Interspecific – Between species
2) Intraspecific – Within the species