By H. Abdul Jaffar Ali, M. Tamilselvi
This ebook addresses the desires and beginner taxonomists as regards to ascidians in Asia. this can be the 1st e-book of its variety and contours colour illustrations performed through the authors in Asia. This e-book offers a short evaluation of ascidians as well as either the taxonomy and distribution of ascidians alongside India’s southern coast. It additionally opens a brand new area for marine researchers within the box of ascidians in Asia. This booklet is the result of the authors’ 15 years of study adventure within the box of ascidians, making it very necessary for researchers, coastal planners, port specialists and the correct administration of coastal thermal vegetation and atomic strength plants.
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Additional resources for Ascidians in Coastal Water: A Comprehensive Inventory of Ascidian Fauna from the Indian Coast
Were employed. 3 Identiﬁcation With experience, some species of ascidian can be identiﬁed in situ and others were collected, photographed and transferred in a container ﬁlled with sea water. The collected specimens were narcotized and then preserved in 8 % formalin with seawater. 3 Identiﬁcation 49 Fig. 4 Substrata a Bivalve b Molluscan shell c Oyster d Coral piece e Partly embedded rock f Calcareous stone g Harbour installation h Rope 50 9 Inventory of Ascidians of Southern India collected after noting the structure and dimension of the whole colony.
1 Class: Ascidiacea 17 Family 4: Corellidae Lahille, 1887 (= Rhodosomatidae Hartmeyer, 1908) Exclusively solitary. Gut loop is partly below, partly at the right side of the branchial sac. The branchial sac has inner longitudional vessels and without secondary papillae. Epicardia are present. Gonads in gut-loop and both ducts open near the anus. Genera: Corella, Rhodosoma, Chelyosoma, and some imperfectly known abyssal genera. Family 5: Ascidiidae Herdman, 1880 Exclusively solitary forms. The gut-loop is entirely on the left side of the branchial sac.
Generally, solitary species reproduce sexually whereas the compound ascidian reproduces sexually by internal fertilization and incubating the larvae in brood sac and asexually by budding and fragmentation. The fragmented colony has the ability to again reattach to the substrates facilitating the dispersal rates of species in a variety of habitats. Many ascidian species are capable of regenerating zooids from basal stolons and this occurs in Ecteinascidia turbinata. A solitary sessile tunicate, Ciona intestinalis spawns approximately 500 eggs per day and its larvae undergo metamorphosis in 1–5 days.