Scientific Research Heavily Favours Vertebrates While Neglecting Invertebrates, Studies Show

Birds and mammals dominate ecological and evolutionary research even though they make up less than one per cent of animal biodiversity on Earth. Two recent studies examined over 1.3 million research papers worldwide and found that vertebrates appear in 53.9 per cent of all papers in this field, despite representing only 4.7 per cent of animal biodiversity.

Research Bias

Scientists from the University of New South Wales in Australia reviewed 1,383,803 papers and discovered that invertebrate groups like arachnids and insects receive far less scientific attention and often end up in specialised journals with narrower readerships. Vertebrate studies frequently appear in higher impact journals, receive more media mentions, and get more citations. Parasites only appear in literature when they link to vertebrates.

Underlying Causes

Researchers attribute this bias, known as taxonomic chauvinism, to logistical ease, societal relevance, peer networks, and early career exposure. Emotional factors and cultural influences also shape research choices. Lead author Pietro Pollo noted that popular culture, such as the movie Finding Nemo, encourages people to pursue scientific careers. Biology professor Divya Uma from Azim Premji University added that humans are visual creatures who focus on larger, charismatic mammals and subjects that directly affect human health and diseases.

Context

Taxonomic chauvinism in science can slow down medical and engineering innovations by limiting the scope of biological research. Addressing this imbalance requires supporting neglected species through outreach and diverse research experiences.