Update. In the field of oil pollution research, "female authors accounted for about 32% of the total authors…were significantly underrepresented in most of the African countries [and in] the UK and Norway…Gender variation in oil pollution publications was discovered to be influenced by religion in Africa; Islam had the mean highest rank when compared with Christianity."
https://doi.org/10.4314/jasem.v29i11.22
The Variation in Authorship between Male and Female Researchers in Oil Pollution Publications in Ten (10) Countries