Category: Animals

Posted on

Alien Invasions Causing Extinctions

Alien Invasions such as the Brown Tree Snake on Guam cause extinctions

New research published in the journal Frontiers in Ecology and the Environment on March 4, 2019, indicates that alien invasions are causing extinctions of native animals. Humans are mostly to blame.

When humans throw the world of plants and animals out of balance, the result is extinctions. We can destroy God’s designed balance when we introduce a non-native species into an environment. The introduced species without natural predators uses up local resources leaving native species without food. There are many examples.

One example is the brown tree snake (Boiga irregularis) which was accidentally introduced to Guam aboard a military cargo ship after World War II. Those snakes are native to Australia and Indonesia where natural predators control them. On Guam, they have decimated 50 percent of the native bird and lizard species and two of the three bat species on the island. The brown tree snakes considered those native species to be tasty treats, and the snakes had no predators to control them. The result was the extinction of many species, some of which existed nowhere else on Earth. Alien invasions of brown tree snakes forever changed the ecosystem of Guam.

In other cases, humans throw nature out of balance by their direct actions. An example of that is the over-hunting of sea otters. Sea otters kept the purple sea urchins in check. Steller’s sea cows (Hydrodamalis gigas)were giant relatives of manatees, and they lived on kelp. Without control by sea otters, the purple sea urchins ate so much of the kelp that Steller’s sea cows had no food, and they became extinct. However, the research project indicated that direct interference by humans in cases like this has less impact on extinctions than the alien invasions have.

Sometimes humans make the mistake of bringing in another non-native species to control the first one. That technique often makes the problems worse. Usually, by the time people discover the problem of alien invasions, it’s too late to fix it.

The research concludes that 25 percent of plant extinctions and 33 percent of animal extinctions were caused by alien invasions – the introduction of non-native species. The bottom line is that humans have not been good stewards of the planet God has given us to enjoy and protect. God gave humans the responsibility to have dominion over creation and “rule over the fish of the sea and the birds of the air and over every living creature that moves on the ground” (Genesis 1:28). Romans 13:1-4 indicates that those who rule over people have the responsibility to protect. We might say the same of us who rule over the creatures.

— Roland Earnst © 2019

Posted on

Guilty of Anthropomorphism

Guilty of Anthropomorphism - Smiling Chimp with Sunglasses

The Oxford English Dictionary defines anthropomorphism as “the attribution of human traits, emotions or intentions to non-human entities.” We are all guilty of anthropomorphism when we attribute the behavior of our pets to human emotions. The Oxford dictionary goes on to say that anthropomorphism “is considered to be an innate tendency of human psychology.”

When a dog is jumping around and barking and licking us, we assume that the behavior of the dog is because of joy. In reality, this is an instinctive behavior in animals when establishing dominance within the pack. When the same dog tucks its tail between its legs and slinks away, we assume it is feeling guilty when it is an act of submission for fear of being attacked.

Some scientists attempt to prove that humans are just animals acting out animal responses to various environments. They conduct experiments to show that animals do the things we think are unique to humans. An example is attempting to explain the human smile. For us humans, a smile is an expression of happiness, warmth, and friendliness. When an animal grins, it shows its teeth expressing terror or aggression. When you see a monkey or ape grin on a commercial, sitcom, or movie, there is a trainer behind the camera threatening it.

Human traits which are not seen in animals include worship, guilt, sympathy, and creativity in art and music. It is essential to look at other explanations when considering the behavior of animals. Recently people witnessed a female whale carrying her dead calf for nearly a week. Several newspaper articles were guilty of anthropomorphism by saying that the whale was expressing grief. Many times animals in the wild avoid the scavenging of a dead sibling or offspring by maintaining a vigil over the corpse. That instinctive action assures that the offspring is, in fact, dead, and avoids spreading the disease that killed the dead animal.

I remember a field trip I had in my NSF graduate workshop for science teachers. At an aquarium in Chicago, we watched a demonstration of natural selection. A hungry northern pike was placed in an aquarium with three small fish. One was a wounded and incapacitated minnow. Another was a slightly wounded but otherwise relatively healthy fish of the same species. The third was a healthy well-fed fish. The lesson plan said that the students should predict which of the three fish the pike would eat. Our group of teachers all agreed it would be the incapacitated minnow. For the next 30 minutes, we watched the pike tear up the aquarium trying to get the healthy minnow and avoiding the two wounded fish. We teachers debated as to why that happened, but the aquarium workers said it was frequently the case.

Humans are unique because we are created in the image of God. That allows us to do things that reflect that unique makeup. When we interpret animal behavior in human terms, we are guilty of anthropomorphism.

–John N. Clayton © 2019

For more on the data see Discover Magazine, April 2019, page 52 -57.

Posted on

Self-Awareness Test Passed by a Fish

Self-Awareness Test Passed by Cleaner Wrasse

One of the indicators that scientists use to measure evolutionary development is a test that determines whether an animal has an awareness of itself. The test involves placing a mirror in front of the organism and then observing the animal to see if it gives evidence that it recognizes that what it sees in the mirror is an image of itself. A recent report says that a fish can pass this self-awareness test.

Self-awareness has been used to categorize animals as having higher intelligence than others. Scientists have considered the mirror test to be the “gold standard.” Applying that test they have determined that great apes, bottlenose dolphins, killer whales, Eurasian magpies, and Asian elephants are all very intelligent and therefore highly evolved. Now a fish known as the cleaner wrasse passes the self-awareness test and must be added to the list.

Researchers in Germany placed a mark on the four-inch fish in a location that could only be seen in a mirror. The cleaner wrasses checked their reflection multiple times and then tried to remove the mark by rubbing their bodies on hard surfaces. With no mirrors, the fish didn’t try to remove the mark. When the mark was placed on the mirror, the fish ignored it.

We should note that the cleaner wrasse survives by inspecting larger fish for parasites and dead tissue. The larger fish waits patiently while the wrasse cleans it by eating what it finds. This mutual relationship protects the health of the larger fish while providing food for the wrasse. Symbiotic relationships like that can be more easily explained by design than by evolutionary theory. Since the wrasse is designed to look for unwanted detritus on the bodies of other fish, perhaps that is why it is keen to notice marks on its own body.

If self-awareness shows high intelligence, we must now add a fish to the list of intelligent mammals and birds. Dr. Alex Jordan reported that the fish “behaviorally fulfills all criteria of the mirror test.” Dr. Jordan says that either the species is self-aware or the gold standard test needs updating.

–John N. Clayton and Roland Earnst

Reference: The Week, March 1, 2019, page 20.

Posted on

Why Do Zebras Have Stripes?

Why do zebras have stripes?

I can remember that even as a child I wondered about zebras. They look like horses in just about every way except the stripes. Why do zebras have stripes?

When I raised that question in my high school biology class, I was told it was for camouflage. That explanation satisfied me until I was in the army where I was taught how to camouflage myself in combat. Our combat uniforms were striped. The leaders told us that the stripes would only work if there were movement around us, and if there wasn’t, we should stand perfectly still. Watching zebras in the wild, to me the stripes seemed like a flag saying “here I am.” I realized that a striped deer in the Michigan woods wouldn’t last very long during hunting season.

A good friend sent me a clipping of an AP report published in the February 23, 2019 issue of The Herald Bulletin in Anderson, Indiana. It finally answered my question of why do zebras have stripes? The article told about research by scientists at the University of Bristol and the University of California at Davis. They dressed horses in white striped coats. The striped horses had significantly fewer horseflies landing on them than the ordinary horses. The striped coats apparently disrupted the visual system of the horseflies. The leader of the research team said that when flies get close to the stripes, they tend to fly past them or bump into them.

In much of Africa, there is a fly that carries a parasite that causes “sleeping sickness” or Trypanosomiasis. The parasite is transmitted to humans and animals by a blood-sucking insect, the tsetse fly. For a zebra, the tsetse fly is the number-one enemy. A healthy zebra can outrun a lion, and most other threats to their survival are of minimal efficiency. Getting away from flies is virtually impossible.

The stripes are a design feature of zebras. In northern areas tsetse flies don’t exist, so deer and horses don’t have stripes. An animal’s external appearance is a genetically determined feature. Why do Zebras have stripes? They are a classic example of how a change in appearance can protect against various kinds of enemies.

This new area of research shows one more example of God’s design in producing a genome that allows animals and plants to survive in a world of constant change.

–John N. Clayton © 2019

Posted on

What Good Are Termites?

What Good Are Termites? Termite Mound

We have had the great pleasure of presenting our lectureships in Australia. One of the common questions from college groups has been, “What good are termites?” The termite mounds in some places we saw were over 10 feet (3 m) tall. People frequently complained that they couldn’t build structures out of wood. There were so many termites that the wood didn’t last long enough to make it cost effective.

Science News (February 16, 2019, page 4) carried an interesting article about termites. Kate Parr is a tropical ecologist from the University of Liverpool in England conducting research for the university and the Natural History Museum in London. She has been examining how ants and termites affect the decomposition and consumption of organic material in rainforests.

As they conducted their study, the research area went through a drought. During the drought, termite numbers doubled, and decomposition rates increased dramatically. They found that during the drought in areas where termites were not disturbed, and their numbers increased there was a greater amount of soil moisture, more nutrient mixing, and better seedling survival rates. Areas where the termites had been eliminated had massive die-offs of plants which affected the animal population. In times of normal moisture with no drought conditions, there was no difference in all these variables. What good are termites? It seems apparent that the termites allowed life to prosper during droughts. In places like the Australian outback, the presence of termites is apparently vital for the avoidance of drought die-offs.

One aspect of design in the cosmos is the fact that there always seem to be animals that serve a unique roll in an area when destructive agents threaten the balance of the ecology. The role of insects and small life-forms in the existence of life on Earth is an area that is very understudied. But new discoveries are coming fast and furious as we see the designs of God allowing life to exist even under the most severe environmental conditions.

–John N. Clayton © 2019

Posted on

BP Oil Spill Becomes Non-Newsworthy

BP oil spill becomes non-newsworthy

Most of us know about the 2010 British Petroleum Deepwater Horizon oil spill disaster because the media promoted it as “the largest ever.” We saw the pictures of the oil slicks, and the horrible images of sea birds and shore animals coated with oil. We saw the frantic attempts of workers trying to save them. We all pay attention until the media decides that the BP oil spill becomes non-newsworthy.

Once the pictures quit coming, and the stories about the consequences and causes of the explosion and the oil seeps quit making the front page, we stopped paying attention to this catastrophic event. The truth is that nothing has really changed. The location of the oil platform that caused the terrible leakage is 12 miles off the Louisiana coast. Since 2004 between 300 and 700 barrels of oil per day have been leaking from the platform. Hurricanes tend to increase the leakage, and oil slicks continue to create havoc all along the coast.

The Washington Post says that no effort is being made to cap the many leaking wells. Every year that they are not capped, over 180,000 barrels of oil leak into the ocean killing marine life and birds. What will be the ultimate effect of all this? The harvesting of seafood in the area around the wells is significantly reduced, and these effects are seen all over the Gulf of Mexico. The tourist industry has been affected as beaches are closed and the pollution curtails fishing. Multiple studies are looking to see what diseases may be caused or accelerated by the oil.

As the BP oil spill becomes non-newsworthy, we don’t hear about it. Reporting on it isn’t attractive to the media because it no longer sells. But as oil spills, plastic materials, and organic waste cause pollution to our bodies of water resulting in human pain and suffering, we need to let our fellow earthlings know what is going on and that God is not to blame.

–John N. Clayton © 2019

Data from The Week, November 2, 2018, page 16.

Posted on

DNA Barcodes Support Biblical Record

DNA Barcodes Support Biblical Record
Nearly every day the newspaper has an article that announces some new research on DNA. One of the recent applications of DNA research is to classify living things. Classification is an old issue, going back to Adam and Eve. In Genesis 2:19-20 God brought all kinds of living organisms before Adam so that he could name them. In 1 Kings 4:33 Solomon wrestled with the issue as well. Our current system of naming living things was brought into existence by Carl Linnaeus in the 1700s, but it is gradually being replaced by what is called DNA barcodes.

You can compare DNA barcodes to the barcodes we see when we shop for merchandise. Instead of bars, DNA barcodes are a string of DNA nucleotides. In 2003 scientists began to identify species by these nucleotides. Mitochondria are rod-shaped organelles that can be considered the power generators of the cell. They convert oxygen and nutrients into adenosine triphosphate (ATP), the chemical energy that powers the cell’s metabolic activities. There is one gene named cytochrome c oxidase subunit 1 (COX1) which is found in mitochondria. It is passed only from mother to offspring. The mixing of traits from the father and mother does not happen in this mitochondria, so the DNA nucleotides in mitochondria make it ideal to use in identifying species.

Studies by M.Y. Stoeckle and D.S. Thaler have involved analyzing the DNA barcodes from five million individual organisms which represent 100,000 different species. What they found was that barcode variations within a species vary by small amounts, and there are huge gaps between the species. What that means historically is that each species is essentially an island not connected to other species. If all species came from a common ancestor, you would not see this, but you would see a river from island to island.

The biblical record is very consistent in identifying the groupings of living things. In our materials, we have referred to these “islands” as being “trees in the forest of life.” First Corinthians 15:39 identifies these “islands” or “trees” in this way: “There is one kind of flesh of men, another flesh of beasts (mammals), another flesh of birds and another flesh of fish.” This same grouping is used consistently in the Bible with Genesis 1 & 2 in describing the creation of life, Genesis 7:14 describing what Noah took on the Ark, and 1 Kings 4:33.

There are many more trees or islands than the Bible describes, and they contain living things that may vary enormously. A major debate in science is whether the dinosaurs were birds or reptiles. DNA barcodes may answer that question, but the implications for the biblical record are not significant. The single “tree of evolution” which has been popular for a very long time does not fit the DNA bar code evidence, but the biblical system does. New research is leading to new understandings both scientifically and biblically. It is an exciting time to be alive and to learn from new scientific tools how accurate the biblical record is and how wise God has been in His creation techniques.
–John N. Clayton © 2019

For further information, go to this website: https://micro.magnet.fsu.edu/cells/mitochondria/mitochondria.html

Posted on

Best Animal Eye

Best Animal Eye
What is the best animal eye? Engineers at the University of Illinois have been researching that question. They have now built the world’s best camera by copying that animal. Their new camera could help military drones see camouflaged or shadowed targets. Their discovery also will allow surgeons to perform many kinds of operations more accurately. They have learned all this from the animal which possesses the best eye known to science. The best animal eye belongs to a small creature known as the mantis shrimp. Here are some of the ways the mantis shrimp’s eyes are superior to all others:

The eye of a mantis shrimp has a dozen different kinds of light receptor cells so they can sense properties of light invisible to other animals. Human eyes have only three types of light receptor cells.

The mantis shrimp eye can sense polarized light which has waves that undulate in one plane. Light reflecting off of a surface is always polarized. This ability allows the mantis shrimp to see objects that would otherwise be invisible because of blending into the background.

A mantis shrimp’s eyes are constructed so that each pixel has a rhabdom which is a rodlike structure made of light receptors. The rhabdoms have threadlike structures called microvilli alternately stacked at right angles. That means the shrimp has cells in the two hemispheres of the eye which are tilted 45 degrees to each other allowing their eyes to detect four polarization directions.

The eye of the mantis shrimp can detect an extensive range of light intensities of light to dark known as the dynamic range. This means that they can see clearly even when there is a very bright area next to a very dark area.

The mantis shrimp is the only animal that can sense a full spectrum of colors and can see the polarization of each color. That means that when there is a complicated background, the animal can still get a clear image.

Electrical and computer engineer Victor Gruev and his research team have already made a camera based on the best animal eye. It has a dynamic range which is about 10,000 times higher than today’s commercial cameras. Gruev and the team are working on a commercial version of their camera. Produced in bulk quantities the improved sensors would cost only $10 each.

There seems to be little doubt that this will be the camera of the future, and science has learned how to make it by studying the best animal eye of one of God’s smallest creatures.
–John N. Clayton © 2019

Data from Scientific American, February 2019, Page 12, or online HERE.
To see our earlier report on the mantis shrimp’s visual system click HERE.

Posted on

Human Wildlife Management

Human Wildlife Management of the Red Wolf
Environmentalists claim that animal species are becoming extinct and that we must preserve their DNA. The problem with this claim is that as the environment changes, animals may not be able to survive. An example is animals that have a very specialized diet, such as eating mostly on bamboo. If something wipes out the bamboo, what are these animals to do? We can save samples of their DNA, but moving them away from their natural habitat to a different place where bamboo is growing may not be the answer. It can expose them to predators and diseases that were not present in their original environment. We call this human wildlife management. While in some cases it can correct what humans have done, there are many cases where humans are not the cause. Massive investments may only delay the inevitable extinction of an animal.

The red wolf is a current example of human wildlife management. Red wolves were once common across a large region of Texas and Louisiana. The red wolf was classified as endangered in 1967 and extinct in 1980, although some were living in zoos and wildlife facilities. In the 1970s, the U.S. Fish and Wildlife Service bred red wolves and in 1986 introduced them to the wild in North Carolina. By 2006 there were over 100 wolves in North Carolina, but the population was not healthy. Many were killed by farmers and ranchers so that by April of 2018, fewer than 50 remained.

Recently a pack of red wolves was found on Galveston Island in Texas. At first, red wolf advocates were delighted. Then they became dismayed when scientists found that the Galveston wolves had DNA that was different from the original red wolves. The change in the DNA may be in part from coyotes in the area. We would suggest that God created red wolves to occupy a particular environmental niche. When that niche was changed, no matter what changed it, another design feature kicked in. That design feature which God has placed in living things is hybridization.

Hybridization is the interbreeding of two animals who are genetically close but not identical. The offspring produced by this mix of genes is often stronger and more resilient than either of the parents. When the Endangered Species Act was implemented in the 1970s hybridization was considered to be something to avoid. The reality is that God’s design allows animals to continue to prosper through hybridization.

Elizabeth Heppenheimer is a biologist from Princeton who has been studying the wolves on Galveston Island. She says, “Now we know hybridization is relatively common in natural systems and does not always have negative consequences, but the policy (of human wildlife management) hasn’t quite caught up with this notion.”

God’s methods work, and when humans try to replace God’s design with human judgments and controls, the results are frequently not what is best.
–John N. Clayton © 2019

Data from “DNA Discovery” by David Warren, Associated Press January 15, 2019.

Posted on

Ice Algae – Designed Polar Grass

Ice Algae
Have you ever wondered how animals that live near Earth’s North and South Poles survive? What do they eat, and how can any kind of food chain exist? The answer to this is ice algae.

Unlike most plants, algae do not have flowers, roots, stems, leaves, or vascular tissue. However, ice algae, like most plants, provide the starting point for a food chain. In this case, it is a food chain in very cold places. Tiny krill, penguins, seals, polar bears, and blue whales all depend on ice algae to survive. In 2016 Dr. Thomas Brown of the Scottish Association for Marine Science studied polar bears and found that 86% of the polar bears’ nutrition came from a food chain that originated with ice algae.

Ice algae have chlorophyll so they can use whatever light is available for photosynthesis. There are a variety of types of algae that live in different conditions. Some live on the surface of the ocean, some on the floor of the ocean, and some in or on the ice itself. Ice algae produce fatty acids which supply nutritional value for animals that live in what would otherwise be a nutritional void. Because there is ice algae, animal life is abundant under, in, and around the ice at both poles.

God has provided interesting food chains all over the planet. As we study global warming and its effect on life in places like the polar seas, we see more of His handiwork and learn why we need to take care of it. The admonition of Genesis 2:15 to “take care of the garden to dress it and keep it” applies as much to us today as it did to Adam and Eve.
–John N. Clayton © 2019

Data from National Wildlife, February/March 2019, pages 14-16.