Pastor’s Notes: Alligator Gar

Alligator gars are ambush hunters and may lie very still at the top of the water waiting for smaller prey to come within range of their deadly jaws. They feed mainly on other fish but have been known to prey on birds, small mammals, turtles, and carrion. Alligator gars have been reported to attack duck decoys and eat injured waterfowl shot by hunters. This gar, in particular, is capable of delivering a serious bite to fisherman or swimmers but there are no documented cases of attacks on humans. All of God’s gars grow slowly and live, relatively speaking, long lives. Females of the species reach sexual maturity around age 11 and may live to be 50 years of age; males mature around age 6 and may live over 25 years. They easily reach 6 ½ ft and weigh over 100 lbs. Females are generally larger than males and have been reported at over 300 lbs. and 10 or more feet in length. The largest recorded alligator gar was taken from the St. Francis River in Arkansas (near Cathy’s old stomping grounds) during the 1930′s and weighed 350 lbs. Their eggs are poisonous, causing illness if consumed by humans. They have a highly vascularized (a good blood supply) swim bladder connected to the throat by a pneumatic duct. By gulping air, gars are able to survive in water with very low oxygen levels, i.e. sloughs. These characteristics provide the perfect design for living within slow moving rivers, reservoirs, oxbow lakes, bayous and bays. However, due to dredging, dams, dikes, and levees the large overflow floodplains that once existed have all but vanished in North America. Consequently, populations of this magnificent fish have in recent times been on the decline over virtually all of its range. For a number of years the Tennessee Wildlife resources Agency has been stocking alligator gar within the Hatchie and the Forked Deer river system in an effort to restore the balance that God intended these giant creatures to provide to the ecology of our river systems. I applaud these efforts as I am certain that we are called to be stewards of God’s creation. Genesis 7:3 makes plain God’s concern that the different kinds of animals would be preserved and Genesis 8:1 indicates that God had not forgotten Noah or the animals. Just as Noah and his family were God’s chosen servants for the preservation of animal life during the time of the flood. I would argue that we too are to preserve and protect what remains of His creation in our day…even the alligator gar.











From fish with four eyes to mammals with two thumbs I have been all over the place of late so I thought I may as well tell you of the curious pattern of reproduction that we see in one of our newest emigrants to the area. Barring no problems, the nine-banded armadillo (Dasypus novemcinctus) gives birth to four identical quadruplets with every birth. This is because the armadillo only produces a single egg, which separates into four separate cells after fertilization thereby producing four identical, same sex offspring (.monozygous quadruplets). As a biologist I always try to find the adaptive benefit of God’s design. Since armadillos don’t normally establish and defend individual territories and the young are not driven away (as is the case in many vertebrate species), it is possible that brother sister mating could present a problem. It may be that since the quadruplets are the same sex there is no danger of the litter mates inbreeding. Some creatures are designed to live within environments that frequently change. God has built into these creatures a high genetic diversity and consequently the ability for the species to adapt to the change taking place in their environment. It is also a possibility that armadillo are simply well adapted to a stable niche within the environment (one that changes very little) and God is diminishing genetic diversity within their populations by producing identical offspring. This would maintain a population of armadillos that are each one centering the purpose God put into them as His creatures and would help ensure their survival against environmental forces that naturally prey upon weakness.
Have you ever heard it said that someone was “all thumbs”? Well, with Vacation Bible School still fresh on my mind, I am reminded of the koala that we saw on the short films that we watched from Australia. While we were never able to see enough detail to pick it up on the films the koala is the mammal that perhaps best fits this description. I say this because they have two opposable digits (like our thumbs) on its front paw rather than the single one that we most often witness across the animal kingdom. I have yet to find a definitive answer as to why God gave them two on the front but it must certainly be a helpful adaptation for an animal that spends virtually all of its life in the trees. The back paw is equally curious though in a different fashion. Unlike the two opposable digits on the forefoot, the single opposable digit (big toe) on the hind foot is not clawed and the reason seems to be equally ambiguous. A third peculiarity concerning the digits of the koala is the fusion of the 2nd and 3rd digits (fingers) to form a single double clawed digit. It is thought to be used primarily for grooming, i.e. removing debris from the fur.
Anableps anableps is a species of fish from South and Central America that is often referred to as the “Four-eyed fish”. Though there really are not four eyes the reason for this nickname is evident. It is due to a unique division of its two eyes that allows this surface dweller to see clearly both above and below the surface of the water. A band of pigment divides the eye horizontally at the waterline and allows the fish to spot predatory fish within the water and predatory birds that might attack from the air. There is even a golden flap on the iris, just above and behind this line of pigment, which shields the “terrestrial” eye from the glare off the water. The portion of the lens behind the upper division of the eye is flattened and designed for light rays that travel through the atmosphere while the lens behind the lower portion of the pupil (opening though which light travels into the eye, i.e. the dark round circle of the human eye) is rounded and designed to bend and focus light rays that travel in water. Underwater images are focused by the lens on the upper portion of the retina (nervous layer at the back of the eye that sends “visual” impulses to the brain) while light from the terrestrial vision is focused on the lower half of the retina. Both images are inverted when they land on the retina and the fish‟s tiny brain must turn them right side up and around so that the fish can make appropriate movements to avoid predation (being eaten) or to capture its own food. What an amazing design God has provided for this creature!