By J. D. Fish, S. Fish (auth.)

ISBN-10: 0045740445

ISBN-13: 9780045740444

ISBN-10: 9401158886

ISBN-13: 9789401158886

At one time or one other, we have now all been drawn through the fascination of the beach. For the vacation maker, the enjoyable day via the ocean usually seems to be a so much lucrative foray between rock swimming pools and dense canopies of seaweed; for naturalists and scholars, the shore is without doubt one of the so much difficult habitats. no matter what our pursuits and services, one among our first goals while confronted with the variety of plant and animal existence at the shore is to call the person specimens and we quick research that this is a tricky, even though profitable, profession. as soon as an organism has been pointed out, a couple of questions obviously stick to. what's its life-cycle? How does it feed and reproduce? How lengthy does it reside? The solutions to such questions supply an perception into the lives of the crops and animals of the shore and are one of many first steps in an comprehend­ ing of the complexity of the shore atmosphere. notwithstanding, the data required to reply to such questions isn't continually simply obtainable or even while it truly is recognized it's always scattered in a variety of books and examine journals making it tough and time eating to discover. even if various id keys and publications is obtainable, a few designed for the expert, others for the beginner, such texts in most cases provide little, if any, details at the biology of the organisms.

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Extra info for A Student’s Guide to the Seashore

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A. esculenta is a perennial, new growth being produced at the base of the frond. A. Agardh (Fig. 17a & b) Frond stiff; branched, irregular or dichotomous; branches with whorls of tiny branchlets. Disc-like holdfast. Characteristic dirty brown colour. Up to 250 mm in length . 45 A STUDENT'S GUIDE TO THE SEASHORE C. spongiosus is widely distributed in north-west Europe on rocks and in pools on the middle and lower shore. It sometimes supports dense tufts of the red seaweed, Jania rubens (p. 58). Dictyota dichotoma (Hudson) Lamouroux (Fig.

Soft and slug-like or leathery and cucumbershaped; creeping 1. Body soft and slug-like, head with tentacles. Surface may be covered with finger-like or branched outgrowths. Often very brightly coloured. In rock pools, among seaweed; sometimes on saltmarshes. Lower shore. Sea-slugs (Mollusca: Opisthobranchia) . page 184 BUT see Lamellaria perspicua (Mollusca: Prosobranchia) . page 216 2. Body cucumber- or sausageshaped; skin may be rough and leathery. Ring of branched tentacles at anterior end.

Jellyfishes (Cnidaria: Scyphozoa) . page 83 28 ILLUSTRATED GUIDE 3. Globular or thimble-shaped body. May have pair of long, trailing tentacles. Just below surface of sea. Sea-gooseberries (Ctenophora) .. page 122 Group 9. Fishes 1. Body varies in shape from eel- like to that of typical fish with conspicuous fins, gill covers, head and tail. In rock pools and under stones, also on sandy shores and in estuaries. Lower shore. Shore fishes (Chordata: Osteichthyes) .. page 394 29 Algae Seaweeds are one of the most conspicuous features of rocky shores and in areas where there is little wave action they may be present in such high densities that they dominate the shore.

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A Student’s Guide to the Seashore by J. D. Fish, S. Fish (auth.)

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