Directory enquiries rder cumadin Sharks live a long time and take many years to mature, which is one reason why they are extremely vulnerable to overfishing. Evidence that sharks utilize the same nursery areas across generations underscores the critical importance of preserving local nursery habitats and can provide strong input in designating inshore marine reserves that would protect sharks of future generations. The fact that some sharks are tightly connected to certain places as opposed to being ocean wanderers also indicates that individual countries or cooperative groups of neighboring countries can take action themselves to protect sharks that are, in a sense, theirs. 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])