D a kitching (6 resultados)

No Binding. Condición: Very Good. ORIGINAL1948 reprint/offprint of journal article; no covers issued; light browning of leaves; o/w in very good condition. Journal.

Soft cover. Condición: VG+. No Dustwrapper. 1st. By Authors.

1. The bed of the Lough Ine Rapids is covered by large laminarian seaweeds, mainly Saccorhiza bulbosa. The fronds form a dense canopy, which has a typical fauna associated with it. 2. A study has been made of the speed of the water current at the level of the canopy throughout the tidal cycle (12 1/2 hr.) at a series of selected stations. The total lengths of water-columns passing and the maximal speed of the current at each station are given in Table 1. The various stations range, in maximal speed of current, from a very low value up to 2 1/2 m./sec. 3. An investigation has been made of the distribution of animals associated with the canopy. This investigation comprises both general observations made throughout the Rapids area and a detailed study of samples of Saccorhiza collected at the stations mentioned above. Of the animals studied six species (three polyzoans and three gastropods) were confined to situations where they were exposed to weak currents only, that is, on the fronds of Saccorhiza at stations of quiet water and in some cases in the shelter of the crenulated margins (`frills') of the stipes at stations of stronger current. Two species (the polyzoan Membranipora membranacea and the limpet Patina pellucida) favoured moderate current and were less abundant in weak or strong current. Two species (the amphipod Jassa falcata and the hydroid Tubularia bellis) favoured proximity to strong current but not direct exposure to it. 4. In experiments with the gastropod Gibbula cineraria it was shown that the adult animal was washed off Saccorhiza by strong currents. 5. There are many ways in which current may directly or indirectly influence the distribution of animals in an area such as the Lough Ine Rapids. Moreover, it may act differently at different stages of the life histories of these animals. Although current is no doubt of paramount importance in the Lough Ine Rapids, the interpretation of the complex interaction of its many effects upon the animals must await much more experimental evidence and must be approached with great caution. 22 pp., 14 figs, gr. 8.…

Paperback. Condición: Brand New. 253 pages. 9.25x6.10x0.59 inches. In Stock.

Hardcover. Condición: Very Good. 1st Edition. These five volumes have been bound together in light-brown buckram, with gilt lettering on spine; has pictorial bookplate of the late paleontologist Farish A. Jenkins, Jr., who laid a corrected version of volume 7's figure 26 atop the original version; front wrapper of vol. 6 has small partial abrasion at left of title; a few pages have minor soil; otherwise tight, text clean. 117; 182; 121; 150; 83 p., with in-text illustrations and plates. Contents: v. 6. fossil rhinoceroses from limeworks cave, makapansgat; new skeleton of thrinaxodon liorhinus; whaitsiids and moschorhinids; two new gorgonopsian skulls; cranio-osteological studies in dicynodon grimbeeki; small thecodont from red beds of stormberg series -- v. 7. new cercopithecoid specimens from makapansgat, south africa; further revision of fossil elephantidae of southern africa; mammalian microfauna in pleistocene deposits of caves in transvaal system; new type of primitive cynodont; on small therocephalians -- v. 8. fossil reptilia of karroo age; nouvelle espece de scaloposauridae; bauria cynops broom; new skull f procynosuchid cynodont leavachia duvenhagei broom; two cynodonts from ntawere formation in luangwa valley of northern rhodesia; notes on new diademodon specimens in price institute; fossil pocketw and bone beds in cynognathus-zone in burghersdorp and lady frere districts; fossil orycterpus from limeworks quarry, makapansgat, potgietersrus -- v. 9. rubidge collection of fossil karroo vertebrates; fossil and subfossil primates from limestone deposity at taung, bolt's farm and witkrans, south africa; chalicothere remains from makapansgat; nomenklatur und verbreitung des genus dinofelis zdansky, 1924; new giant hyracoid from limeworks quarry, makapansgat; new gomphodont cynodont from cynognathus-zone of south africa; on two new specimens of lystrosaurus-zone cynodonts; new large bauriamorph from cynognathus-zone of south africa; new ictidosuchid (scaloposauria) from lystrosaurus-zone; miospore zones in karroo sediments of tanzania -- v. 10. general review of devonian fossil plants in cape system of south africa. Large, heavy volume. [otob: 33r]. …

Condición: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Heliothis ( Bull worm ) species are one of the major pests of field crops worldwide, including sorghum, tomatoes, lettuce, and cotton. Pest problems have intensified over the years as the total area given to agricultural host plants has increased. Th.…