Always so spot on.
So sharks are great at seeking out certain chemical cues in the water. Some examples include blood or chemicals in certain prey items guts that sharks can use to track them down. Great White Sharks can even sense 1 drop of blood in 100 L of water.
Knowing this, you’d probably assume that the higher concentration of a chemical cue the quicker the reaction to the cue.
Interestingly, a 2010 study showed that this is not the case - the most important factor is actually which side of the shark picks the cue up - one side generally has a faster reaction time. It was also shown that this difference was less pronounced in hammerhead sharks.
Ernst Haeckel has some absolutely amazing drawings in his Kunstformen der Natur - Artforms in Nature.
Above are some radiolarians, nudibranchs and cnidarians.
The IPCC recently drew their meeting in Stockholm to a close. So what did they conclude?
- There’s a 95-100% certainty that humans are to blame for the current global warming trend.
- There’s been a 0.89 c mean temperature increase across the whole planet since 1901.
- By the end of this century it’s likely to rise another degree.
- In the polar regions temperatures will probably rise 2 degrees by the end of the century.
- The oceans are 26% more acidic now than they were in 1901.
Scariest of all: If current greenhouse gas emissions continue at the same rate, we’ll probably see the first ice free arctic summer in 2050.
Read the IPCC press release here
There’s gonna be a short decline in activity over the next week and a half or so while i go to Bermuda and do marine biology related things. I’ll try and post some stuff while i’m there, but i can’t make any promises!
(if nothing else there’ll be a massive amount of Bermuda related posts when i get back)
This 6 clawed lobster was caught a couple of days ago off the coast of Maine. Something about that claw just makes me uneasy..
It’s now living at the Maine State Aquarium if you feel like visiting.
Corals don’t only exist in shallow water reefs in the tropics. These corals are known as cold water or deep water corals and can be found at most ocean depths and temperatures. They generally have a hard exoskeleton of calcium carbonate (as opposed to some of their soft bodied shallow water counterparts). The increased deep sea cable laying and bottom trawling over the last few decades has put deep sea coral habitats at risk. Still, there’s no reason to be too worried yet - the deep sea is the largest habitat on earth.
This Tomopteris, a deep sea planktonic worm. When disturbed (by man or a predator) it becomes displays some beautiful bioluminescence.
The venus flytrap anemone (Actinoscyphia aurelia). It captures small prey floating in the water column by closing “mouth” and is a major part of sea floor communities at around 1500 m depth.
For being so cute, pufferfish are very poisonous.
A popular dish in japan just because it is so poisonous, supposedly eating it causes dizziness and numbness of the lips. Sounds delicious.