1,969 research outputs found
A systematic study of the Mexican and Guatemalan gray squirrel, Sciurus aureogaster F. Cuvier (Rodentia: Sciuridae).
http://deepblue.lib.umich.edu/bitstream/2027.42/56381/1/MP137.pd
THE ALLOCATION OF LISA RESEARCH AND EXTENSION FUNDING
This article considers the political, economic, and environmental factors associated with the allocation of federal LISA (Low Input/Sustainable Agriculture) funds among states. A tobit model is estimated with LISA allocations as the dependent variable. Results indicate that pressure groups are important. LISA funding depends positively on membership in environmental organizations, the number of farms, and the size of the rural-nonfarm population, while it depends negatively on the size of the urban population. States with host LISA institutions receive significantly more funding, as do states with Senators in leadership positions on key congressional agricultural committees.Teaching/Communication/Extension/Profession,
U.S. Corn Producer’s Response to Increased Energy Prices: Evidence from Producer Surveys in 2001 and 2005
Crop Production/Industries, Risk and Uncertainty,
Evaluation of DSS-14 pedestal-review of top surface repair procedures
Proposed repair procedures for the top surface of the pedestal supporting the hydrostatic bearing runner for the 64m Antenna are presented. These procedures included: (1) removal of existing grout and concrete to approximately 8 in. below original concrete surface using a presplitting technique with expansive cement followed by secondary breaking; (2) preparation of exposed concrete surface including an epoxy bonding agent; and (3) replacement of material removed with 8 in. of new concrete surface including an epoxy bonding agent; and (4) replacement of material removed with 8 in. of new concrete and 4 in. of new grout
The glans penis in Neotropical cricetines (Family Muridae) with comments on classification of muroid rodents
http://deepblue.lib.umich.edu/bitstream/2027.42/56367/1/MP123.pd
AN EVALUATION OF INTEGRATED PEST MANAGEMENT WITH HETEROGENEOUS PARTICIPATION
Principal component analysis in employed to develop indices that distinguish between participants and nonparticipants in Integrated Pest Management (IPM) programs. Results of incorporating these indices into yield, net return, and production cost functions for cotton producers indicate that both yield and costs increase as the degree of producer participation in IPM increases. Although these results are inconsistent with previous research, they are consistent with the theoretical relationship between IPM and conventional input usage.Crop Production/Industries,
A NEW SPECIES OF \u3ci\u3eRHYNCHOMYS\u3c/i\u3e (MURIDAE) FROM THE PHILIPPINES
. . . Mr. Whitehead has made a most wonderful and unexpected discovery, that of a new and peculiar Mammal-fauna inhabiting the Luzon highlands, and, so far as is yet known, mostly isolated on a small plateau on the top of Monte Data, in the centre of Northern Luzon, at an altitude of from 7000 to 8000 feet. With this dramatic announcement, Oldfield Thomas (1898:377) introduced to naturalists the spectacular rats found by Whitehead: Crateromys schadenbergi, Carpomys melanurus, C. phaeurus, Batomys granti, Chrotomys whiteheadi, Celaenomys silaceus, and Rhynchomys soricoides. One of the most interesting of these to Thomas was R. soricoides, which he had previously named and briefly described in 1895. This shrew-rat is medium-sized with a very long muzzle, small eyes, short dense fur, dark brown upperparts, gray underparts, a short brown tail, and brown feet. Its very long and slender rostrum, small zygomatic plates, small white incisors, and tiny basined teeth indicated adaptations for special foods, possibly soft-bodied invertebrates. Nothing quite like Rhynchomys had been discovered before, either in the Philippines or elsewhere. Thomas based his description of R. soricoides on five individuals collected by Whitehead, all from Mount Data. Two others were obtained from Mount Data during 1946 and subsequently reported by Sanborn (1952). Rhynchomys was represented by these specimens until 1961, when an example was caught on Mount Isarog in the southeastern part of Luzon. That specimen, which forms the nucleus of our report, is significant because it indicates that Rhynchomys occurs on at least one other highland in Luzon, and because some of its morphological features fall outside the range of variation of the series taken on Mount Data. The differences in external and cranial characters between the two samples suggest to us that the specimen from Mount Isarog was drawn from a population that is reproductively isolated from that on Mount Data. We hypothesize that the specimen represents a new species, which we name Rhynchomys isarogensis (new species), and describe below
Murid rodents
p. 229-334 : ill., maps ; 26 cm.Includes bibliographical references (p. 330-334)."Four groups of murid rodents that were once included in Rattus are taken out of that genus: the Rattus niviventer-group from Southeast Asia and the Sunda Shelf, which is placed in the genus Niviventer; the Rattus sabanus-group, which comprises the genus Leopoldamys, also occurring in Southeast Asia, the Sunda Shelf, and the Mentawai Islands; Rattus ohiensis from Ceylon, which is placed in Srilankamys, new genus; and the Rattus beccarii-group of Sulawesi for which the new gneus, Margaretamys, is proposed not only for beccarii but also for the new species M. elegans and M. parvus. Anonymomys mindorensis, new genus and species, is proposed for an arboreal rat from Mindoro in the Philippines. The genera are diagnosed, described, compared with others, and their contents discussed. Their possible relationships to Lenothrix, Dacnomys, Chiromyscus, and Maxomys, groups that were either once considered to be part of Rattus or at least Rattus-like, are discussed in the context of their affinities relative to Rattus"--P. 229
Ricefield rat
30 p. : ill. ; 24 cm.Includes bibliographical references (p. 26-30)."In the present report I document the identity of Rattus pesticulus, a taxon named and described by Oldfield Thomas (1921) from one specimen obtained in northeastern Celebes, with the ricefield rat, R. argentiventer. The ricefield rat lives in grasslands and fields of rice and has a spotty geographic distribution that extends from the mainland of Southeast Asia to the Philippines and New Guinea. I also list and discuss the scientific names that apply to R. argentiventer and point out the zoogeographic significance of its occurrence on Celebes and New Guinea"--P. [1]
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