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| Figure 1: One of the two kinds of squid worked on the bigfin reef squid, Sepioteuthis Lessoniana |
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| Figure 2: Pygmy squid, Idiosepius paradoxus |
The pygmy squid was different from the bigfin reef squid. This time the researchers saw that the pygmy squid decreased in the amount they attacked. They found there was a 20% decrease in the proportion of pygmy squid that attacked their prey when exposed. They also saw that like the bigfin reef squid they were slower to attack their prey and changed body patterns more often. They also attacked their prey from farther away. Spady also found that both species showed increased activity when they were not hunting. He believes that they could be adversely altering their "energy budgets." Overall they found that the increased carbon had similar affects on the two squid species, suggesting that a variety of Cephalopods could be affected by the rising carbon levels in the oceans. This could cause massive problems in marine ecosystems. The next step in research is to determine how well these species and other marine species can adapt to the growing carbon in their environment.
Source for article and figure 1:
https://www.eurekalert.org/pub_releases/2018-03/acoe-hss032018.php
Source for figure 2:
https://alchetron.com/Idiosepius
It's neat comparing the different influence the elevated carbon levels had in the two different species. I think it's interesting that while the proportion of attacking squid stayed the same with the bigfin species, the pygmy species saw a decrease while both species slowed down. It makes me wonder if maybe, because of their size, the pygmy squid are just less tolerant of the elevated carbon and can't keep up? I would be interested in seeing whether these influences are true for other cephalopods like octopuses and cuttlefish, along with ways decreased predation may influence different habitats.
ReplyDeleteI find this article very interesting because I have read papers before on how elevated carbon levels affect many shelled species or fishes, but I have not read a paper on cephalopods until now. My question for you is how did these researches measure these feeding behaviors? Do they have any idea on how the rising carbon levels might affect other activities such as reproduction, respiration, movement, etc.?
ReplyDeleteIts interesting that they measured the changes in the behaviors of both species of squid. Do they plan on finding out why exactly the increased amount of carbon decreases their behavior? Do you think the increased carbon concentrations decreases their metabolic rates for some reason?
ReplyDeleteI found this article to be very interesting. I never thought about elevated carbon levels affecting cephalopods. My question is are there other behaviors besides feeding that the researchers could look at as well?
ReplyDeleteThis is interesting. My main question is: what other affects are occurring from land to ocean? I feel as though humans are blamed for a lot of things other than the carbon levels heightening. I also question what this will do in a span of the next 5-10 years.
ReplyDeleteI found this post particularly interesting, because it is not the first time that increasing carbon levels have affected marine life, including hunting strategies. A few years ago, for example, I read an article about how increased temperatures and carbon levels affect shark hunting. These increases make it hard for sharks to smell, ultimately affecting their hunting abilities, along with increasing their metabolism and need for food. Studies like these help open our eyes to just how influential and destructive our actions can be.
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