466
H. STEINITZ: Fish Ecology of the Red Sea and Persian Gulf
data with controlled laboratory experiments. It is worth mentioning in this connection
that there are indications of a south-to-north trend in the Red Sea in the variation of
certain morphological characters of fishes, and that it has been claimed for certain invertebrates that the percentage of endemic species increases in a northward direction.
H. STEINITZ: Fish Ecology of the Red Sea and Persian Gulf
data with controlled laboratory experiments. It is worth mentioning in this connection
that there are indications of a south-to-north trend in the Red Sea in the variation of
certain morphological characters of fishes, and that it has been claimed for certain invertebrates that the percentage of endemic species increases in a northward direction.