200,902 research outputs found
Mirnapis ohloweni Packer and Dumesh, new species with notes on M. inca Urban (Hymenoptera: Apidae: Eucerini)
No full textPacker, Laurence, Dumesh, Sheila (2012): Mirnapis ohloweni Packer and Dumesh, new species with notes on M. inca Urban (Hymenoptera: Apidae: Eucerini). Zootaxa 3478: 113-122, DOI: 10.5281/zenodo.20940
Feedlot and Packer Pricing Behavior: Implications for Competition Research
No full textSeldom are observed losing bids available in industry data. A special workshop of the Fed Cattle Market Simulator was designed to capture bids for each pen of cattle traded. Data enabled identifying buyer and seller behavior in the price discovery process, both before and after imposed mergers of the two largest and two smallest packer teams. Highest losing bids also were estimated with packer bid functions and compared with observed highest losing bids. An estimated price discovery model indicated market structure as measured by number of buyers was more important than simply the number of bids or size of transactions.Buyer behavior, Competition, Fed cattle, Marketing, Pricing, Seller behavior, Livestock Production/Industries,
FIGURE 3 in Mirnapis ohloweni Packer and Dumesh, new species with notes on M. inca Urban (Hymenoptera: Apidae: Eucerini)
No full textFIGURE 3. Terminalia of male Mirnapis, ventral views. A and C, M. ohloweni (S7–S8 and genital capsule respectively); B and D, M. inca (S7–S8 and genital capsule respectively).Published as part of Packer, Laurence & Dumesh, Sheila, 2012, Mirnapis ohloweni Packer and Dumesh, new species with notes on M. inca Urban (Hymenoptera: Apidae: Eucerini), pp. 113-122 in Zootaxa 3478 on page 116, DOI: 10.5281/zenodo.20940
FIGURES 8A–M. Chilicola granulosa Packer, n in Fifteen new species of Chilicola (Hymenoptera: Apoidea; Colletidae)
No full textFIGURES 8A–M. Chilicola granulosa Packer, n. sp. Head of male: A. frontal view, B. lateral view. C. frontal view of female head. Male: D. labrum. E. pronotum. F. Hind leg. G–I. Male terminalia. G. S7. H. S8. I. genital capsule. Dorsal views are to the left. J–L. Sting apparatus of female: J. hemitergite 7, K. hemitergite 8, L. First and second valvifer with gonostylus. M. sting shaft. Stippling in A indicates pale colouration, elsewhere it indicates membranous regions.Published as part of Packer, Laurence & Genaro, Julio A., 2007, Fifteen new species of Chilicola (Hymenoptera: Apoidea; Colletidae), pp. 1-55 in Zootaxa 1468 on page 24, DOI: 10.5281/zenodo.17662
FIGURES 3A–M. Chilicola obesifrons Packer, n in Fifteen new species of Chilicola (Hymenoptera: Apoidea; Colletidae)
No full textFIGURES 3A–M. Chilicola obesifrons Packer, n. sp. Male head: A. frontal view, B. lateral view. Female head: C. frontal view, D. lateral view. E. pronotum of male. F. surface sculpture of pronotum, mesoscutum and scutellum of female. G. Hind leg of male. H–J. Terminalia of male: H. S7, I. S8, J. genital capsule. Dorsal views are to the left, ventral to the right. K–M. Sting apparatus of female: K. hemitergite 7, L. hemitergite 8, M. first and second valvifers with sting shaft. Stippling in A and G shows areas of pale colouration, in H it refers to dark colouration on a translucent background, in J and M it indicates membranous regions; dotted lines in A and C show outline of swollen, impunctate areas.Published as part of Packer, Laurence & Genaro, Julio A., 2007, Fifteen new species of Chilicola (Hymenoptera: Apoidea; Colletidae), pp. 1-55 in Zootaxa 1468 on page 7, DOI: 10.5281/zenodo.17662
Power Packer Sheepsfoot Roller Model M-50, Lt8 16884
No full textPhotograph of the Power Packer Sheepsfoot Roller Model M-50. LeTourneau introduced its first diesel-electric, self-powered sheepsfoot roller in March 1959, according to author Eric Orlemann
Contract Pricing and Packer Competition in Fed Cattle Market
No full textWe use a game-theoretical framework to analyze the coexistence of spot and contract markets in the cattle industry. A duopsony scenario with two packers and N feeders is used to reflect the reality in the cattle industry. Our main contribution is to incorporate the risk components and the pricing of hedonic attributes of cattle quality. Our preliminary results show that packers have an incentive to transform bidding strategies in spot markets when a series of hedonic characteristics play some significant roles in establishing cattle prices in contract market. That is, we will show that the effectiveness of contract with TOMP clauses on packer competition in a spot market depends on whether there is a correlation between spot price and hedonic characteristics. The results may shed light on understanding potential effects of captive supplies on market power and may aid in the assessment of the policies designed to enhance competition in the cattle industry.Marketing,
Geodiscelis (Nazcoediscelis) Packer and Dumesh, new subgenus
No full textGeodiscelis (Nazcoediscelis) Packer and Dumesh, new subgenus urn:lsid:zoobank.org:act:0249B 978 - 22 A 9-4919 - 95 D 9 -A 54 EE 618 DE 33 Type species. Geodiscelis nazcalinea Packer & Dumesh sp. nov. Here designated. Diagnosis. The combination of metasoma with pale subapical transverse bands, maxillary palpus with all 6 palpomeres similarly robust and malar space at least 3 X as long as the basal depth of the mandible is sufficient to identify any colletid bee as belonging to this subgenus. Additionally, the males have S 6 obtusely angulate or with a spine apicomedially. Description. Lower paraocular area black. Male protibia entirely or almost entirely yellow. Metasomal terga with pale subapical integumental bands, basal bands of appressed squamose pubescence present, minute silvery hairs absent. Clypeus and lower paraocular area dull due to imbricate microsculpture. Frontal area with interspaces equal to or greater than puncture diameters. Mesoscutum somewhat shiny, microsculpture imbricate; punctures transversely effaced. Galeal comb teeth absent. Mandible with subapical tooth small to absent. Malar space enormous, at least three time as long as basal depth of mandible. Anterior tentorial pit elongate, almost attaining apex of clypeus. Supraclypeal area mostly flat. Metasternum between metacoxae very narrow, width subequal to MOD. First abscissa of M+Cu of hind wing shorter than 2 nd abscissa. Male hindleg unmodified, narrow; both sexes with two metatibial spurs. Horizontal surface of metapostnotum subequal in length to scutellum. Sclerotized portion of proctiger undivided medially. Male S 6 with apex angulate or spinose. S 7 apicodorsal lobe simple, flat. S 8 apical process narrowing to apex; posterior margin of lateral lobe narrowly concave, posterior convexity laterad. Gonobase with apicoventral rim lacking a median process. Gonoforceps with subapical medial angulation. Gonostylus short, narrow; retrorse lobe broad, rounded. Female sternal scopa well developed. Included species. Geodiscelis longiceps Packer, 2005, G. nazcalinea Packer & Dumesh, sp. nov. and G. phisquiri Packer & Dumesh sp. nov. Etymology. The name is derived from that of the type species, which was first found very near to the famous Nazca lines in Peru, combined with Oediscelis. Comments. This subgenus is known only from west of the peaks of the Andes mountains and occurs from the coastal plains of Peru to moderate altitude on the western slopes of the mountains in Chile. The enormously elongate head is undoubtedly related to the need to obtain nectar from Boraginaceae with deep nectaries. Similarly elongate heads are known in a few species of Xeromelissa where additional mouthpart elongation arises primarily through lengthening of the maxillary palpus. In contrast, the maxillary palpi of Geodiscelis (Nazcoediscelis) are unmodified, as is the case in all xeromelissine genera except Xeromelissa (although they are elongate in some species of Chilicola (Hylaeosoma)); Geodiscelis (Nazcoediscelis) have the cardines, stipites and prementum all extremely elongate. While three subgenera may seem excessive for a genus containing only 5 species at present, the enormous diversity found within these few species would seem to justify recognizing them at this rank. It is perhaps worth noting that there are 170 monotypic subgenera, and almost 100 monotypic genera, among the bees (Ascher & Pickering, 2013). All Geodiscelis species have been found associated with flowers of Heliotropium or Tiquilia, both members of the Boraginaceae. There are numerous species in this group of plants in the region encompassed by known records of Geodiscelis and additional searching among their flowers will undoubtedly result in the discovery of more undescribed bees. Following more exhaustive searches for these interesting little bees and the discovery of more species, a formal biogeographic analysis might be of interest. Currently, the two short headed subgenera are from Argentina whereas species of the long headed subgenus are from west of the Andes.Published as part of Packer, Laurence & Dumesh, Sheila, 2014, Two new species of Geodiscelis Michener & Rozen (Hymenoptera: Apoidea: Colletidae) with a phylogenetic analysis and subgeneric classification of the genus, pp. 275-291 in Zootaxa 3857 (2) on page 288, DOI: 10.11646/zootaxa.3857.2.7, http://zenodo.org/record/22550
FIGURES 17A–R. Chilicola aenigma Packer, n in Fifteen new species of Chilicola (Hymenoptera: Apoidea; Colletidae)
No full textFIGURES 17A–R. Chilicola aenigma Packer, n. sp. Head of male: A. frontal view, B. lateral view. Head of female: C. lateral view, D. frontal view. E. male pronotum. F. Male hind femur and tibia. G. Female hind femur and tibia. H. Male T6, T7 and apex of S6. I. Lateral view of male metasomal venter. J–M. Male terminalia. J. S7. K. S8. L. genital capsule, dorsal views are at the left. M. Genital capsule, lateral view. N–R. Sting apparatus of female: N. hemitergite 7, O. hemitergite 8, P–Q. Furcula, dorsal and lateral views respectively. R. First and second valvifer with sting shaft. Stippling in A and B indicates pale colouration, in R a membranous region.Published as part of Packer, Laurence & Genaro, Julio A., 2007, Fifteen new species of Chilicola (Hymenoptera: Apoidea; Colletidae), pp. 1-55 in Zootaxa 1468 on page 53, DOI: 10.5281/zenodo.17662
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