Impact of lack of fauna on an industrialized society
Related to a previous question which focused more on surviving on such a world.
This presumes a significant advancement in technologies - that is, to 1940s-1950s level technology. There are some differences, primarily in aircraft, but assumptions about historic tech can generally be presumed to hold true to this tech.
The planet has no significant surface animal life. There is significant aquatic life, so fishing is a source of some food, although nutritional value of native foods may vary. At this point, such food problems are solved via farming and processing and other methods. Rabbits, Mice, and Pythons are also around, being brought through some form of a plot device. Rabbits and Mice have been genetically modified to consume the native life, but pythons have been not. Pythons are thus the "House Pet" of choice and are generally not eaten. Rabbits and Mice, being specifically modified for that purpose, are freely eaten. (This question is not focusing on what the impact of the introduction of these species would have - that's an entirely different question which I intend on asking later).
Plant life is assumed to have at least some sort of tree equivalent so that we can have a wood equivalent and paper equivalent, etc.
In addition to this, the geography of the world, ease of transporting food, and other factors have caused society to become significantly reliant on seafaring. Recent and "recent" technology such as trains and aircraft are reducing it, but as the inland areas outside of rivers and easily accessible waterways are largely uninhabited except where important resources are found. Gravity is higher (Approximately 1.3G) and sea level air pressure is lower (About 80% of Earth's). Again, these are not the focus of the question but may be relevant.
Now, for the Actual Question:
What impact would a lack of ground/air-based life larger than insect size have on an industrialized, 1940s-1950s era society be, if any?
Update for Humans
Humans have arrived some years ago via space travel - However, they weren't prepared to be colonists so weren't able to take their technology with them. They had to start fairly primitive - How primitive is largely irrelevant to the story as the story starts at the 1940s-1950s tech level. This question is not on how the technology would have progressed to this level, it's specifically intended to be how a lack of fauna changes 1940s to 1950s tech regardless of how this tech level was achieved.
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