Sex ratio did not vary significantly with water hardness, pH, annual thermal units, or latitude. The possible adaptive significance of density-dependent sex determination in lampreys, however, remains elusive. It has been proposed that growth-promoting conditions might yield female-biased sex ratios ...
The operational sex ratio of river lamprey in spawning clusters changed between spawning phases, from domination by females during the nest‐building phase (male : female ratio, 1 : 3·46), to a preponderance of males during the spawning phase (male : female, 1 : 0·37), followed by a ...
Sex Ratio of Ammocœtes IN a previous communication 1 , it was suggested that variations in the sex ratio of adult brook lampreys ( L. planeri ) might be due to the effect of environmental factors on the course of differentiation in the so-called hermaphrodite ... MW Hardisty - 《Nat...
An ecological population study of lampreys in the Lotka-Volterra tertiary trophic level based on sex differences This study examines the adaptive changes in sex ratio on animal populations and its effects on ecosystem stability and interactions. The effects of sex rat... R Mao,Z Su,X Ma,......