How many animals needed to be brought aboard?
Doctors Morris and Whitcomb in their classic book, "The Genesis Flood," state that no more than 35,000 individual animals needed to go on the ark. In his well documented book, Noah's Ark: A Feasibility Study, John Woodmorappe suggests that far fewer animals would have been transported upon the ark. By pointing out that the word "specie" is not equivalent to the "created kinds" of the Genesis account, Woodmorappe credibly demonstrates that as few as 2,000 animals may have been required on the ark. To pad this number for error, he continues his study by showing that the ark could easily accommodate 16,000 animals.)
But, let's be generous and add on a reasonable number to include extinct animals. Then add on some more to satisfy even the most skeptical. Let's assume 50,000 animals, far more animals than required, were on board the ark, and these need not have been the largest or even adult specimens.
Remember there are really only a few very large animals, such as the dinosaur or the elephant, and these could be represented by young ones. Assuming the average animal to be about the size of a sheep and using a railroad car for comparison, we note that the average double-deck stock car can accommodate 240 sheep. Thus, three trains hauling 69 cars each would have ample space to carry the 50,000 animals, filling only 37% of the ark. This would leave an additional 361 cars or enough to make 5 trains of 72 cars each to carry all of the food and baggage plus Noah's family of eight people. The Ark had plenty of space.
The total cubic volume would have been 1,518,000 cubic feet [462,686.4 cubic meters] --that would be equal to the capacity of 569 modern railroad stock cars
http://www.christiananswers.net/q-eden/edn-c013.html
The following animals could have survived outside the ark (Whitcomb 1998, p.68):
25,000 species of fish
1,700 tunicates (mane chordates like sea squirts) found throughout the seas
600 echinoderms including star fish and sea urchins
107,000 mollusks such as mussels, clams and oysters
10,000 coelenterates like corals and sea anemones, jelly fish and hydroids
4,000 species of sponges
31,000 protozoan, the microscopic single-celled creatures.
Noah would not have to be concerned with the aquatic mammals such as the dolphins, whales, porpoises, sea lions, and walrus. There are also many aquatic reptiles that could survive outside of the ark. These would include many types of snakes, alligators, crocodiles, and sea turtles. There are almost a million species of arthropods that would survive the flood. Animals such as the following: shrimps, crabs, lobsters, and many other crustaceans. All of the insects could survive outside the ark. Mote than 35,000 species of worms and nematodes would also survive the flood.
In reality only a small percentage of the animals would have to be taken on board the ark. The vast majority of the animals that inhabit the earth either live in water and/or do not have "the breath of life."
How many animals did Noah's Ark carry?
Many writers on the subject of Noah's ark have different estimates for the amount of animals that the ark would have to carry. Doctors Morris and Whitcomb in their book, The Genesis Flood, estimate that approximately 35,000 animals were placed on board the ark. In another book written on the subject, Noah's Ark: A Feasibility Study, John Woodmorappe states that only about 2,000 animals would have to be on the ark. Being rather conservative he continues his study with the assumption that 16,000 animals could easily be cared for on the ark.
Let's be conservative and use the figure of 40,000 animals. This allows for extra animals to represent those that have gone extinct and those animals that have not been properly cataloged. This figure of 40,000 animals is 5,000 more than largest previously mentioned numbers. Based on our present understanding of the number of animals this figure should satisfy even the most skeptical.
Animal Space Calculations
Most animals are not very large. The average size of all animals, is the size of a sheep, some say a small rodent. One railroad stock car can carry about 240 sheep. This would mean that all 40,000 animals could fit in 167 railroad cars. The arks total capacity was 569 stock cars. The 40,000 animals would require less than 30% of the ark's space. In other words all the animals could fit on one of the ark's three decks. This would leave the other 70% of the ark's space for Noah's family, food, supplies, and baggage.
Dimension of the Ark: 300 cubits x 50 cubits x 30 cubits. If the cubit used is 18" then conversion gives us the following dimensions: 450 ft x 75 ft x 45 ft
Deck Area of the Ark: 450 ft x 75 ft x 3 decks = 101,250 ft2
Volume of the Ark: 450 ft x 75 ft x 45 ft = 1,518,750 ft3
Many biologists state that the average size of most vertebrates is the size of a sheep. Other sources state that the average size is about the size of a small rabbit. Since there is some doubt as to what is the average size of the animals that were brought into the ark, and this paper is a conservative analysis of the carrying capacity of the ark, we will use the larger sheep average.We will also base our calculation on four different occupancy estimates. The first is my own conservative estimate of 40,000. The second is the estimate of Whitcomb at 35,000. The final two figures of 16,000 and 2,000 are based on the work of Woodmorappe. The 16,000 figure is based on the biblical kind being equivalent to the taxonomic rank of genus. The second figure of 2,000 is based on the biblical kind being equivalent to the taxonomic rank of family.
Based on railroad industry figures a railroad stockcar can hold 240 sheep and each stock car has a capacity of 2670 ft3. Therefore each sheep requires 11.125 ft3. Most authorities on rabbit husbandry give the dimensions for a rabbit hutch as 3.0 ft3per animal. If the average animal size is indeed the size of a small rabbit the calculations shown below could be reduced by a factor of three.
The following calculations show the amount of the ark space that would be required to carry the stated number of animals, based on the average size of a sheep.
40,000 animals x 11.125 ft3 = 445,000 ft3 OR 445,000 ft 3
1,518,750 ft3 נ100 = 29% of the Ark's capacity
35,000 animals x 11.125 ft3 = 389,375 ft3 OR 389,375 ft3
1,518,750 ft3 נ100 = 25% of the Ark's capacity
16,000 animals x 11.125 ft3 = 178,000 ft3 OR
(kind = genus taxon) 178,000 ft3
1,518,750 ft3 נ100 = 11.7% of the Ark's capacity
2,000 animals x 11.125 ft3 = 22,250 ft3 OR
(kind = family taxon) 22,250 ft3
1,518,750 ft3 נ100 = 1.4% of the Ark's capacity
http://www.biblestudy.org/basicart/sizeark.html