Answers are grounded in this paper and cite their sources.
Totally, 330 (125 females, 205 males) red foxes Vulpes vulpes (Linnaeus, 1758) killed during predator control operations (January to April 1992) in central Italy, were dissected. Their kidneys, spleen, heart, liver, and adrenal glands were weighed and related to body mass, age, sex, and kidney fat index.
No takes yet. Share an insight, caveat, or question.
Paolo Cavallini (1997) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: