Reproduction and Development in Mollusca

T. J. Pandian (Madurai Kamaraj University, Tamilnadu, India)

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English

CRC Press
31 March 2021

Developmental biology; Marine biology; Molluscs

Series: Reproduction and Development in Aquatic Invertebrates

This book is perhaps the first attempt to comprehensively project the uniqueness of molluscs, covering almost all aspects of reproduction and development from aplacophorans to vampyromorphic cephalopods. Molluscs are unique for the presence of protective external shell, defensive inking, geographic distribution from the depth of 9,050 m to an altitude of 4,300 m, gamete diversity, the use of nurse eggs and embryos to accelerate the first few mitotic divisions in embryos, the natural occurrence of androgenics in a couple of bivalves, viable induced tetraploids, gigantism induced by elevated ploidy, the complementary role played by mitochondrial genome in sex determination by nuclear genes and the uptake and accumulation of steroid hormone from surrounding waters. In molluscs, sexuality comprises of gonochorism (< 75 %) and hermaphroditism, which itself includes simultaneous (> 24%), protandry (< 1 %), Marian and serial. In them, the presence of shell affords iteroparity and relatively longer life span in prosobranchs and bivalves but its absence semelparity and short life span in opisthobranchs and cephalopods. Within semelparity, gonochorism facilitates faster growth and larger body size but hermaphroditism small body size. In them, sex is irrevocably determined at fertilization by a few unknown genes and is not amenable to any environmental influence. However, the sex determining mechanism is more a family trait in bivalves. Primary sex differentiation is also fixed and not amenable to environmental factor but secondary differentiation is labile, protracted and amenable to environmental factors. Both sex differentiation and reproductive cycle are accomplished and controlled solely by neurohormones. In these processes, the role of steroid hormones may be alien to molluscs.

By: T. J. Pandian (Madurai Kamaraj University Tamilnadu India)
Imprint: CRC Press
Country of Publication: United Kingdom
Dimensions: Height: 234mm, Width: 156mm,
Weight: 435g
ISBN: 9780367782061
ISBN 10: 0367782065
Series: Reproduction and Development in Aquatic Invertebrates
Pages: 320
Publication Date: 31 March 2021
Audience: Professional and scholarly , Undergraduate
Format: Paperback
Publisher's Status: Active

Introduction. Shell and reproduction. Sexual reproduction. Regeneration and asexual reproduction. Aestivation. Sex determination. Sex differentiation. Ocean acidification. Uniqueness of molluscs. References.

T.J. Pandian: Visiting Professor, CAS Marine Biology, Annamalai University, Tamil Nadu, India.

Reviews for Reproduction and Development in Mollusca

""The author provides a thorough scholarly apparatus, including an exhaustive reference list along with separate author, species, and subject indices. The figures are clean, and the hundreds of tables are useful synopses of the material being discussed. Most references are from 1990 to 2010. Having them in one volume will be valuable to graduate students or faculty who use the work as a reference book."" --L. T. Spencer, emeritus, Plymouth State University, CHOICE August 2018