Zoology
Biology of the Invertebrates
By Dr. Ruchi Sharma, Dr. Priyanka Kumari, Edited by J.A. Kim
Invertebrates, comprising over 95% of all animal species, represent a vast and diverse group of organisms that lack a vertebral column or backbone. This group includes animals such as insects, mollusks, crustaceans, worms, jellyfish, and many others, occupying nearly every habitat on Earth-from deep oceans to terrestrial environments. The biology of invertebrates encompasses their structure, function, ecology, reproduction, and evolutionary history, offering key insights into the complexity and adaptability of life forms. Invertebrates display an incredible variety of body plans, from the simple, soft-bodied forms of sponges and cnidarians to the highly segmented and specialized structures of arthropods and annelids. Their modes of nutrition range from filter-feeding and scavenging to predation and parasitism. Reproductive strategies are equally diverse, including sexual and asexual reproduction, with many species exhibiting complex life cycles involving metamorphosis. Studying invertebrates is crucial for understanding ecosystems, as many serve essential roles such as pollinators, decomposers, and key links in food webs. Additionally, their evolutionary relationships provide important clues to the origin of vertebrates. The biology of invertebrates thus represents a foundational field in zoology, ecology, and evolutionary biology. Biology of the Invertebrates explores the vast diversity, anatomy, physiology, and ecological significance of animals without backbones, revealing their essential role in Earth's ecosystems. Contents: 1. Introduction, 2. Invertebrate Larvae, 3. Coelenterata, 4. Classification of Phylum Annelida, 5. Mollusca, 6. Parasitic Worms (Helminths), 7. Primitive Invertebrates, 8. Internal Anatomy and Physiology, 9. Zoological Nomenclature in Invertebrates, 10. Systematics Biology
About the Authors
Dr. Ruchi Sharma is an Assistant Professor in the Department of Zoology at Dhanauri PG College, Dhanauri, Haridwar, Uttarakhand. She holds a Ph.D. in Zoology, with her doctoral research focused on Investigations on Helminth Parasites of Freshwater Fish Fauna of Muzaffarnagar (with special reference to the morphological and ecological aspects). Her academic interests include parasitology, fish biology, aquatic ecology, and environmental studies. Dr. Sharma's research offers critical insights into the biodiversity and ecological dynamics of freshwater ecosystems, particularly concerning parasitic infestations and their effects on fish health. She has published 16 research papers in reputed national and international journals and is actively involved in guiding students in zoological studies. With a strong commitment to both fieldwork and laboratory analysis, she contributes significantly to aquatic parasitology. Dr. Sharma also regularly participates in academic seminars and workshops, further strengthening her profile in higher education and scientific research. Dr. Priyanka Kumari is an Assistant Professor in the Department of Zoology at Dhanouri PG College, Dhanauri, Haridwar, Uttarakhand. She holds a Ph.D. in Zoology, with her research focused on "Photobiological Studies on Fish Barilius bendelisis in the Presence of Selected Photosensitizers." Her academic and research interests include fisheries science, environmental toxicology, biodiversity conservation, and photobiology, showcasing her multidisciplinary expertise in life sciences. Dr. Kumari has published more than 14 research papers in reputed national and international journals and has presented her work at various academic forums across India and abroad. Her commitment to scientific research and environmental sustainability reflects in both her teaching and fieldwork. She is actively involved in mentoring students and contributing to the scientific community through ongoing research and collaborative initiatives. Her work aims to bridge academic knowledge with ecological conservation, making her a valuable asset to the academic and research landscape.