Customize Consent Preferences

We use cookies to help you navigate efficiently and perform certain functions. You will find detailed information about all cookies under each consent category below.

The cookies that are categorized as "Necessary" are stored on your browser as they are essential for enabling the basic functionalities of the site. ... 

Always Active

Necessary cookies are required to enable the basic features of this site, such as providing secure log-in or adjusting your consent preferences. These cookies do not store any personally identifiable data.

No cookies to display.

Functional cookies help perform certain functionalities like sharing the content of the website on social media platforms, collecting feedback, and other third-party features.

No cookies to display.

Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics such as the number of visitors, bounce rate, traffic source, etc.

No cookies to display.

Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.

No cookies to display.

Advertisement cookies are used to provide visitors with customized advertisements based on the pages you visited previously and to analyze the effectiveness of the ad campaigns.

No cookies to display.

Tag Archive for "jellyfish"

I found some more depressive news about our oceans. According to an article on discovery.com we are seeing increasing amounts of jellyfish in our oceans. Researchers believe the reason for this is overfishing and global warming.

The amount of jellyfish is a good indicator of how life in oceans change. The larger species feed on jellyfish and when these species are becoming less numerous the jellyfish are able to grow. Jellyfish also compete with other species about food sources like small fish and zooplankton so when there are large number of jellyfish in the ocean it is able to hurt the regrowth of other species.
One other reason that jellyfish is getting the upper hand is the rising ocean temperature as jellyfish are able reproduce for a longer period of time.

The growing numbers of jellyfish has been observed all over the world and especially in parts of the oceans where there is heavy fishing going on, like off the coast of Namibia.
I have also observed unusually large numbers of jellyfish here in Northern Norway. I hope this is a part of their natural circle and not a sign of a failing ecosystem..

This could be some really bad news for the environment in Australia. According an article on cairns.com.au Roger Bradbury, a professor at Australian National University, predicts that if the over fishing at the Great Barrier Reef continues it will turn into a dead zone filled with slimy creatures. He says that the large marine species are keeping in check jellyfish and algae. If the large species were to disappear or the populations are heavily reduced “you get an ocean that’s like swarms of jellyfish, blooms of algae,” Roger Bradbury said.
The professor want to immediately phase out the commercial fishing at the Great Barrier Reef to save the remaining stocks, but of course those who decide are a bit skeptical to stop the fishing. Fishing = big money.

When I read this article I kept thinking about if this could happen here in Northern Norway too. Last year no big shoals of coalfish came into our fjord and that is the first year I have ever experienced that. Some fishermen claimed that this was because there was a big bloom of algae. Could it be that the bloom of algae was caused by over fishing? This spring I have also observed massive quantities of jellyfish swimming around which I find a bit worrying.
I hope this is not a sign of over fishing in my area.