I have always loved fish. The diversity in visual splendor and quirky behaviors drew me to them when watching ocean documentaries as a child. However, the explanation “because they’re awesome!” doesn’t cut it when you want to conduct research. Research costs money, and whether that money comes from private industry or the government, it’s essential that researchers can justify the use of their study organisms. Today, I’m going to break down the equation of why fish are worthy and need research funding.
There are at least 33k living species of fish, accounting for over half of living vertebrate species . This incredible diversity includes jawless lamprey, cartilaginous sharks, rare deep-sea coelacanths, colorful clownfish, and so much more (Fig. 1)! Fish around the world have adapted to all types of habitats, from the freezing waters of the Arctic to the deepest trenches of the ocean. There is much to learn from fish about how vertebrates were able to survive in changing and even inhospitable environments.
Figure 1. Can you name all these different fish?
Fish have inhabited the earth for over 500 million years (ancient and awesome). In this time, fish have become an integral part of the marine and aquatic food web (Fig. 2). Some fish feed directly on low-trophic level organisms like plankton, algae, and marine plants. These fish usually serve as food for larger fish and marine mammals. As a result, significant changes in fish abundances can cause a trophic cascade, affecting levels of prey (like algae, plankton, jellyfish) and/or predators (like tuna, swordfish, sharks). Maintaining healthy levels of fish is integral to maintaining a healthy ecosystem.
Figure 2. An example of an aquatic food web in Lake Superior (Source: NOAA Great Lakes). Make your own trophic cascade: pick a fish and trace all of the species that would be directly and indirectly affected if that species was removed from the ecosystem.
Worldwide coastal tourism was valued to be $161 billion in 2008 . Fish are beautiful to see in their natural habitat and also are a popular target for people who like to eat delicious and nutritious food. Tourism concerning marine and aquatic ecosystems includes recreational fishing, snorkeling/scuba diving, and boating (Fig 3). It is difficult to know what percentage of this is attributable to fish. Even so, consider that even if fish are not what people came to see while on vacation, fish are likely to affect local animals (prey for birds, sea lions), habitat (cleaner of corals), and even quality of beach sand under your feet (see parrotfish poop).
Figure 3. Snorkeling is one of my favorite ways of feeling close to the ocean. There’s nothing like looking a fish in the eye to take your breath away! (CC0 Public Domain)
In 2012, fish products contributed $137.7 billion in aquaculture and $129.2 billion in exports worldwide . Many people in developed countries greatly enjoy the taste and nutrition that fish provide. In developing countries, catching fish is a way of putting food on the table or providing for your family. Fish are an incredibly important source of protein for the world. The global population is predicted to increase to 9.6 billion people by 2050, meaning that we must continue developing methods and technologies to produce enough food to feed all those mouths. Fish are a natural food source, but they are by no means unlimited. Implementing sustainable fishing practices and maintaining healthy ecosystems worldwide will be essential to foster productive populations of fish. You can read more about sustainable seafood here and learn how anyone can contribute toward building this food source for the future.
Last but not least, evolution’s gift to me: there is a cowfish, and it has horns (Fig 4).
Figure 4. Couldn’t help myself. Look at that cutie! (CC0 Public Domain)
Let’s add up the value of fish research:
33,200 + 500,000,000 + 161,000,000,000 + 266,900,000,000 + 1 = 267,561,033,201
(Please send in the form of a fish-shaped check to the poor graduate student fund (my bank account)!)
Fish are a vital part of ecosystems and economies around the world. Therefore, it is important to support scientific research to understand and maintain an environment that sustains healthy fish populations. Go fish!
 Hastings, Philip A., Walker H. J., and Galland Grantly R. Fishes: A Guide to Their Diversity. University of California Press, 2014. http://www.jstor.org/stable/10.1525/j.ctt9qh2k9.
 An Overview of the State of the World’s Fresh and Marine Waters 2008. http://www.unep.org/dewa/vitalwater/article168.html
 FAO. 2014. The State of World Fisheries and Aquaculture 2014. Rome. 223 pp. http://www.fao.org/3/a-i3720e.pdf
More From Thats Life [Science]
- Finding wildfire’s niche in the Anthropocene
- The Earth is a blue marble (and the world is green)
- Four Unexpected Ways that Living in Cities Affects Wildlife
- Celebrating 117 Years of Christmas Bird Counts · 'Tis the Season for Citizen Science
- Why fish deserve our research money · Fish are friends AND food
- Integrating knowledge of microbial ecology into building architecture. · Building with Microbes (In Mind)
- Halloween Tales from the Ocean · A thorny, venomous creature is terrorizing coral reefs
- The magic of in-between places along the Appalachian Trail · Walking through Transitions
- How are forest insect outbreaks like wildfires?
- Sharing the ecosystem with wildlife - why getting outside is more important than ever
- How Mercury in Fish Could End Up in Your Dish · The Mercurial Path of Mercury to Aquatic Ecosystems
- Nicotine Dreams - Baby Birds Protected by Cigarettes
- A reflection about the value of water and the forest · Drinking from the rivers and eating from the forests
- Good intentions sometimes lead to unfortunate outcomes · 4 ways humans harm the environment (when they are trying to help)
- Catch-and-release anglers catalyze conservation for the prized golden dorado fish · Fishing Towards Conservation
- Marvel at Larval - An Appreciation for Young and Developing Fish
- Some Australians consider kangaroos to be pests. Surprised? So was I.
- A World without Birdsong
- A closer look at species diversity in the tropics · It's Standing Room Only At The Equator
- More ›