castell l (15 Ergebnisse)

paperback. Zustand: Very Good.

PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000.

Zustand: Good. 5th or later printing.

Zustand: Good. 5th or later printing.

Hardcover. Zustand: Very Good. No Jacket. Hardcover 1977 edition, vol 2. Library bound. Ex-library book with stamps and labels attached. Binding firm. Pages unmarked and clean. Covers and text in very good condition. [252 pages].

XIII, 454 p. Hardcover. Versand aus Deutschland / We dispatch from Germany via Air Mail. Einband bestoßen, daher Mängelexemplar gestempelt, sonst sehr guter Zustand. Imperfect copy due to slightly bumped cover, apart from this in very good condition. Stamped. Gestempelt. Sprache: Englisch.

Zustand: Very good.

Zustand: gebraucht; sehr gut. Einband leicht verfärbt (altersbedingt), Inhalt wie ungelesen.

Zustand: Bueno. Ed. Diputacion Provincial de Barcelona 1959. Rustica. 25x17. 54 pp. Ilustrado.

Paperback. Zustand: Good. 1st Edition. 250 p.

On an intertidal reef flat at Orpheus Island on the Great Barrier Reef, the gastropods Turbo brunneus and juvenile Trochus niloticus share the same habitat with the predatory gastropod Thais tuberosa. To determine if the two prey species differed in their antipredator behaviour and interactions with the predator, we examined: (1) the distributional pattern of the three species in the field; (2) the proportion of mortality attributable to non-crushing predators (i.e. Thais tuberosa) in T. brunneus and T. niloticus, determined by the frequency of freshly dead and undamaged shells; and (3) the response of T. brunneus and T. niloticus to T. tuberosa in laboratory and field experiments. We compared the responses of hatchery-reared and wild juvenile T. niloticus to determine if lack of previous exposure to the predator affected the behaviour of cultured juveniles. Finally, (4) we studied prey choice by Thais tuberosa. We found that: (1) the field distribution of all three species showed high overlap and prey and predator were often found in close proximity; (2) the proportion of recently-killed, undamaged shells was 28% for T. brunneus and 10% for T. niloticus; (3) T. brunneus and T. niloticus responded very differently to the predator: Turbo brunneus showed a conventional flight escape response, moving nine times faster than normal when close to T. tuberosa. The flight response was observed in all trials with T. brunneus in the laboratory, but only in 52% of trials in the field. In contrast, T. niloticus did not change speed but instead released a white mucus in the presence of the predator. Response in the field was also less intense than in the laboratory. Cultured and wild T. niloticus showed the same response when exposed to T. tuberosa. although cultured juveniles were, on average, slightly more active than wild juveniles. Lastly, (4) Thais tuberosa showed a strong preference for T. brunneus as prey. Food value, expressed as dry flesh weight, did not explain this preference. Capture rate of the preferred species T. brunneus fell to zero in water containing mucus released by T. niloticus. The results indicate that predation by T. tuberosa is more intense for T. brunneus than for T. niloticus and that a likely cause for this difference lies in the antipredator responses of the two prey species. The mucous response of T. niloticus appeared to be more effective for avoiding predation by T. tuberosa than was the flight response of T. brunneus. 15 pp., 3 figs, gr. 8.

Perfect Paperback. Zustand: gebraucht; wie neu. Ausgabe 1977, minimale Spuren, wie ungelesen.

T.R.O.U. N°8, Juin 2000, 38 p. non numérotées, bon état.

Zustand: Assez bon. EL PUNT EDHASA (illustrator).

John C. Winston Co., Toronto, 1903. 578 S. mit zahlr. Illustrationen. Hln.---Privateinband 750 Gramm.