By Mary N. Arai (auth.)
Scyphozoa have attracted the eye of many sorts of individuals. Naturalists watch their sleek locomotion. Fishermen may well dread the swarms that could hinder fishing or consume larval fish. Bathers retreat from the water in the event that they are stung. humans from a few Asiatic nations consume the medusae. Comparative physiologists study them as probably uncomplicated versions for the functioning of assorted platforms. This e-book integrates information from these and different investigations right into a practical biology of scyphozoa. it's going to emphasize the big variety of adaptive responses attainable in those morphologically fairly uncomplicated animals. The e-book will pay attention to the examine of the final 35 years, in part simply because there was a swift enlargement of data in the course of that interval, and in part simply because a lot of the former paintings used to be summarized via books released among 1961 and 1970. Bibliographies of papers on scyphozoa have been incorporated in Mayer (1910) and Kramp (1961). Taxonomic diagnoses also are incorporated in these monographs, in addition to in a monograph at the scyphomedusae of the USSR released by means of Naumov (Naumov, 1961). such a lot impor tantly, a genenttion of scyphozoan staff has used as its 'bible' the monograph through F.S.Russell (1970) The Medusae of the British Isles. regardless of its restrictive name, his publication experiences many of the info at the biology of scyphozoa as much as that date.
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Extra info for A Functional Biology of Scyphozoa
It is considered that the latter are probably the sensory cells because they bear paired cilia which face the mesoglea rather than the exterior in the adult, and because they make synaptic connections with neurons (Yamasu and Yoshida, 1973; Pollmans and Hiindgen, 1981). In A. aurita examined with freeze-fracture, these putative sensory cells of the oral ocellus show intramembranous particles similar to those of photoreceptors in higher animals (Takasu and Yoshida, 1984). In the aboral ocellus of A.
1982; Anderson, Moosler and Grimmelikhuijzen, 1992). 5 Nervous system of polyps Less is known about the nervous system in polyps than in medusae. , 1965; Korn, 1966; Loeb and Hayes, 1981; Chia, Amerongen and Peteya, 1984; Hofmann and Hellman, 1995). There is a concentration of neurons at the base of the tentacles. Ciliated sensory cells are also present in the tentacles (Westfall, 1973; Chia, Amerongen and Peteya, 1984). 4). , 1965; Schwab, 1977a). In the polyp of the coronate Atorella japonica a more dense nerve plexus forms a ring on the upper column below the tentacles (Matsuno and Kawaguti, 1991).
M. 7 Radial section through a marginal sense organ of the medusa of Paraphyllina intermedia. ex = exumbrellar epithelium; h = hood; I = lens of ocellus; s = statocyst; t = touch plate. M. and James, 1973; Pollmans and Hiindgen, 1981). On the exumbrellar surface of the bell above the base of the rhopalium is another sensory pit, which is shallow, with radial folds (Maaden, 1939; Russell, 1970). The exumbrellar sensory epithelium overlies a thick layer of nervous and ganglion cells (Pollmans and Hiindgen, 1981).
A Functional Biology of Scyphozoa by Mary N. Arai (auth.)