![]() ![]() ![]() “Her earlier work suggested that the reduced size and energy reserves of faster developing flies led to lower investment in mechanisms, by which males manipulate the females, leading to lowered sexual conflict levels. Sexual selection, a situation where some males obtain more matings than others, plays a big role in mediating higher sexual conflict, it added. Thus, there is often a co-evolutionary arms race type scenario, in which males evolve to maximise their reproductive success by manipulating the reproductive patterns of females, often to the detriment of the latter, while females in turn evolve ways to avoid such manipulation,” DST said. “In recent decades, there has been a great interest in understanding sexual conflict, which arises because male reproductive success is limited primarily by access to females, whereas female reproductive success is limited primarily by access to resources required to make eggs. Researchers from the JNCASR, an autonomous institution of the department of science and technology ( DST), who studied the evolutionary behaviour of fruit flies ( Drosophila) as a model organism, have found reduced levels of sexual selection in their laboratory populations selected for several hundred generations for rapid development from egg to adult, and for reproduction relatively early in life, when compared to their ancestral populations. ![]() BENGALURU: Scientists from Jawaharlal Nehru Advanced Centre for Research ( JNCASR) have found that sexual conflict in organisms can decrease as they evolve a shorter effective lifespan, reproducing early in life. ![]()
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