Consulta: subjectFacets:"Madagascar"
Registros recuperados: 49
Data/hora: 06/06/2024 04:49:45

Monitoring Impacts of Natural Resource Extraction on Lemurs of the Masoala Peninsula, Madagascar
Provedor de dados: 7
Autores: Merenlender, Adina; University of California, Berkeley; adina@nature.berkeley.edu; Kremen, Claire; Center for Conservation Biology and Wildlife Conservation Society; ckremen@leland.Stanford.EDU; Rakotondratsima, Marius; Wildlife Conservation Society, Madagascar; mphrl@ukc.ac.uk; Weiss, Andrew; Center for Conservation Biology; aweiss@bing.stanford.edu.
Monitoring the influence of human actions on flagship species is an important part of conserving biodiversity, because the information gained is crucial for the development and adaptation of conservation management plans. On the Masoala Peninsula in Madagascar, we are monitoring the two largest prosimian species, Eulemur fulvus albifrons and Varecia variegata rubra, at disturbed and undisturbed forest sites to determine if extraction of forest resources has a significant impact on the population viability of these species. To test the sensitivity of lemur species to routine extraction of natural resources by local villagers, we compared population demography and density for both species across six study sites, using a new census technique. Three of the...
Tipo: Peer-Reviewed Reports
Palavras-chave: Biodiversity; Buffer zone; Census techniques; Conservation; Eulemur fulvus albifrons; GIS; Lemurs; Madagascar; National park; Natural resource extraction; Primate; Protected area management; Varecia variegata rubra.
Ano: 1998

Accounting for the Ecological Dimension in Participatory Research and Development: Lessons Learned from Indonesia and Madagascar
Provedor de dados: 7
Autores: Pfund, Jean-Laurent; International Center for Forestry Research (CIFOR); j.pfund@cgiar.org.
Tipo: Peer-Reviewed Reports
Palavras-chave: Ecological dimension; Indonesia; Madagascar; Management of natural resources; Multiple stakeholders; Participatory research and development; Tropical forest landscapes.
Ano: 2008

A Multisector Framework for Assessing Community-Based Forest Management: Lessons from Madagascar
Provedor de dados: 7
Autores: Raik, Daniela B; Cornell University; dbr23@cornell.edu; Decker, Daniel J; Cornell University; djd6@cornell.edu.
Community-based forest management has proliferated throughout Africa as national governments have decentralized the administration of public forestry.  Community-based forestry has taken multiple forms, depending on the assortment of land-tenure systems, forest-use norms, wood demand, and social organization, among others factors. Nature, Wealth, and Power is an analytical framework that has been developed from experiences in natural resource management in Africa. In this paper, we amend the framework to People, Nature, Wealth, and Power (PNWP), and propose it as an analytical lens for community-based forest management initiatives.  We use the PNWP framework to assess the responsiveness of contractual forest management in the Menabe region of Madagascar to...
Tipo: Peer-Reviewed Insight
Palavras-chave: Community-based forest management; Decentralization; Forestry; Madagascar.
Ano: 2007

Not All Roads Lead to Resilience: a Complex Systems Approach to the Comparative Analysis of Tortoises in Arid Ecosystems
Provedor de dados: 7
Autores: Leuteritz, Thomas E. J.; Redlands Institute; thomas_leuteritz@redlands.edu; Ekbia, Hamid R.; Redlands Institute;.
The concept of resilience has been widely used in the study of social-ecological systems, with its key components identified as resistance, latitude, and precariousness. We use this concept to examine the differences among three semi-arid regions in terms of these three components. We do this by examining the status of tortoises that occur in the dry spiny forest Madagascar, the Karoo of South Africa, and the Mojave Desert of the United States as an indicator of the health and resilience of their respective ecosystems. Our findings demonstrate the tight coupling between societal development and ecosystem dynamics, the role of diversity in enhancing resilience, and the significance of local communal knowledge in sustaining it. Our findings also suggest that...
Tipo: Peer-Reviewed Synthesis
Palavras-chave: Collective variable; Control parameter; Latitude; Madagascar; Panarchy; Precariousness; Resistance; Social-ecological systems; South Africa; United States.
Ano: 2008

Shear velocity structure of the crust and upper mantle of Madagascar derived from surface wave tomography
Provedor de dados: 5
Autores: Pratt, Martin J.; Wysession, Michael E.; Aleqabi, Ghassan; Wiens, Douglas A.; Nyblade, Andrew A.; Shore, Patrick; Rambolamanana, Gerard; Andriampenomanana, Fenitra; Rakotondraibe, Tsiriandrimanana; Tucker, Robert D.; Barruol, Guilhem; Rindraharisaona, Elisa.
The crust and upper mantle of the Madagascar continental fragment remained largely unexplored until a series of recent broadband seismic experiments. An island-wide deployment of broadband seismic instruments has allowed the first study of phase velocity variations, derived from surface waves, across the entire island. Late Cenozoic alkaline intraplate volcanism has occurred in three separate regions of Madagascar (north, central and southwest), with the north and central volcanism active until &lt;1 Ma, but the sources of which remains uncertain. Combined analysis of three complementary surface wave methods (ambient noise, Rayleigh wave cross-correlations, and two-plane-wave) illuminate the upper mantle down to depths of 150 km. The phase-velocity...
Tipo: Text
Palavras-chave: Surface wave; Ambient noise; Tomography; Madagascar; Intraplate volcanism.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00600/71182/69528.pdf

Spatial imprints of plate tectonics on extant richness of terrestrial vertebrates
Provedor de dados: 5
Autores: Descombes, Patrice; Leprieur, Fabien; Albouy, Camille; Heine, Christian; Pellissier, Loic.
Aim  In interaction with past climate changes, it is likely that plate tectonics contributed to the shaping of current global species diversity, but so far this has not been statistically quantified at the global level. Here, we tested whether plate tectonics since the breakup of Gondwana left an imprint on current patterns of species richness of amphibians, birds and mammals. Location  Global. Methods  We reconstructed the absolute positions of continental plates since the Early Cretaceous and used this information to derive variables of latitudinal shifts and potential exchanges among landmasses that could have modulated species richness. Using a multi-model inference approach combining both contemporary and historical variables, we quantified the...
Tipo: Text
Palavras-chave: Amphibian; Bird; Continental drift; Diversity; Indo-Pacific; Madagascar; Mammal; Plate tectonics; Southeast Asia; Wallace line.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00373/48413/48711.pdf

Densification of the Ground-Based GNSS Observation Network in the Southwest Indian Ocean: Current Status, Perspectives, and Examples of Applications in Meteorology and Geodesy
Provedor de dados: 5
Autores: Bousquet, Olivier; Lees, Edouard; Durand, Jonathan; Peltier, Aline; Duret, Anne; Mekies, Dominique; Boissier, Patrice; Donal, Thomas; Fleischer-dogley, Frauke; Zakariasy, Lova.
In the frame of the research project IOGA4MET, a new ground-based GNSS network is being deployed in the Southwest Indian Ocean (SWIO) since November 2017. This new network opens up for new research opportunities in geodesics and atmospheric sciences in this area regularly exposed to natural hazards, and significantly expands the International GNSS System (IGS) network, which only includes eight stations so far in the SWIO. After a description of the current status of IOGA4MET, several examples of regional applications in meteorology (climatology and numerical modeling) and geodesy (monitoring of ground deformations) are presented using data collected in northern Madagascar and small neighboring islands in 2018–2020. The observed water vapor cycle is shown...
Tipo: Text
Palavras-chave: Southwest Indian Ocean; GNSS - Global Navigation Satellite System; Water vapor cycle; Madagascar; Mayotte; Geodesy; NWP (numerical weather prediction); AROME Indian Ocean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00651/76324/77302.pdf

When is an aster not an aster? A new deep-sea Discorhabdella (Demospongiae, Poecilosclerida) with asters, from the Mozambique Channel
Provedor de dados: 5
Autores: Vacelet, Jean; Cardenas, Paco.
Discorhabdella pseudaster n. sp. is an incrusting sponge from the upper bathyal zone of the 'Banc du Geyser', north of Madagascar, Mozambique Channel This new species is described only from a single specimen but it is remarkable by the presence of spicules similar to euasters, a type of microsclere unknown in Poecilosclerida. These spicules are in fact a new example of homoplasy, being derivatives of the typical Discorhabdella pseudoastrose acanthostyles, which are here reduced to the aster-like tyles. The isochelae with a large lamella on the shaft are also quite unique in Poeciloclerida.
Tipo: Text
Palavras-chave: Porifera; New species; Madagascar; Bathyal; Homoplasy.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00688/79995/82965.pdf

Estimating fishing effort in small-scale fisheries using GPS tracking data and random forests
Provedor de dados: 5
Autores: Behivoke, Faustinato; Etienne, Marie-pierre; Guitton, Jérôme; Randriatsara, Roddy Michel; Ranaivoson, Eulalie; Léopold, Marc.
During the last decade spatial patterns of industrial fisheries have been increasingly characterized using tracking technologies and machine learning analytical algorithms. In contrast, for small-scale fisheries, fishers’ behaviour for estimating and mapping fishing effort has only been anecdotally explored. Following a comparative approach, we conducted a boat tracking survey in a small-scale reef fishery in Madagascar and investigated the performance of a learning random forest algorithm and a speed threshold for estimating and mapping fishing effort. We monitored the movements of a sample of 31 traditional sailing fishing boats at around 45 s time interval using small GPS trackers. A total of 306 daily tracks were recorded among five gear types (beach...
Tipo: Text
Palavras-chave: Boat movement; Fishery map; GPS track; Madagascar; Spatial data; Speed threshold.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00669/78059/80289.pdf

Biologie et pêche traditionnelle des crevettes pénéides dans l'embouchure d'un fleuve en milieur semi-aride (sud-ouest de Madagascar)
Provedor de dados: 5
Autores: Laroche, Jean; Benoely,; Siaviri, A.
Traditional fishing using beach seines was studied over a period of one year at the mouth of the Onilahy river. The catches/efforts were recorded on a daily basis, biological sampling and the measurement of hydrological parameters being carried out twice a month. The moderate variations of salinity and temperature (14 &lt; salinity &lt; 35; 25 degrees C &lt; temperature &lt; 30 degrees C) which were observed in the estuary can be explained by the semiarid climate of the area. Four species of penaeid shrimps are to be found on the Onilahy: Metapenaeus monoceros, Panaeus indicus, Penaeus monodon and Penaeus japonicus, which were mainly caught at the subadult/adult stage with a Carapace length between 10 and 50 mm. The presence of these important sizes at the...
Tipo: Text
Palavras-chave: Pêche; Estuaire; Dynamique population; Croissance; Taille corporelle; Cycle évolutif; Zone semi aride; Madagascar; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Metapenaeus monoceros; Rivière Onilahy; Afrique; Milieu saumâtre; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata; Fishing; Estuaries; Population dynamics; Growth; Body size; Life history; Semi arid zone; Malagasy Republic; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Africa; Brackish water environment; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 1995
URL: http://archimer.ifremer.fr/doc/00097/20828/42822.pdf

Pleuronectidae de l'île de la Réunion et de Madagascar. I. Poecilopsetta
Provedor de dados: 5
Autores: Quero, Jean-claude; Hensley, D; Mauge, A.
Among specimens of Poecilopsettinae (pleuronectidae) recently collected from the waters of Réunion Island and Madagascar is one species new to science (Poecilopsetta vaynei). Other species represented in the collections are Poecilopsetta natalensis and a postlarva of a Poecilopsetta species. A key to Indo-Pacific species of Poecilopsetta is presented. NOT CONTROLLED OCR
Tipo: Text
Palavras-chave: Taxonomy; Malagasy Rep.; Reunion Island; ISW; Poecilopsetta sp.; Poecilopsetta vaynei n. sp.; Poecilopsetta natalensis; Pleuronectidae; Taxonomie; Madagascar; Ile de la Réunion; ISW; Poecilopsetta sp.; Poecilopsetta vaynei n. sp.; Poecilopsetta natalensis; Pleuronectidae.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-3766.pdf

Development of the shrimp industry in the Western Indian Ocean - a holistic approach of vertical integration, from domestication and biosecurity to product certification
Provedor de dados: 5
Autores: Le Groumellec, Marc; Rigolet, Vincent; Panchayuthapani, Duraisamy; Vandeputte, Marc; Rao, Vemulapalli Manavendra.
The shrimp farming industry in the western Indian Ocean started with Aqualma’s project in 1989, and now several companies farm shrimp in the Mozambique Channel. Despite the remoteness of these projects and their high investment and operating costs, they compete in the global marketplace by efficiently producing high value quality products. To address sustainability and biosecurity issues, Aqualma developed domesticated specific pathogenfree (SPF) broodstock of Penaeus monodon from western Indian Ocean stocks, which have been its exclusive source of post-larvae since 2003. Specific molecular diagnostic tools have been developed for each endemic pathogen detected since 1996, and these are used for routine surveillance of Aqualma’s shrimp stocks along with...
Tipo: Text
Palavras-chave: Shrimp; Madagascar; Domestication; Biosecurity; Certification.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00099/20980/18604.pdf

Crustal seismic structure and anisotropy of Madagascar and south-eastern Africa using receiver function harmonics: interplay of inherited local heterogeneities and current regional stress
Provedor de dados: 5
Autores: Tsang-hin-sun, Eve; Evain, Mikael; Julia, J; Lamarque, G; Schnurle, Philippe.
This study investigates the seismic structure and anisotropy in the crust beneath Madagascar and south-eastern Africa, using receiver functions. The understanding of seismic anisotropy is essential for imaging past and present deformation in the lithosphere-asthenosphere system. In the upper mantle, seismic anisotropy mainly results from the orientation of olivine, which deforms under tectonic (fossil anisotropy) or flow processes (in the asthenosphere). In the crust, the crystallographic alignment of amphiboles, feldspars(plagioclase) or micas or the alignment of heterogeneities such as fractures, add to a complex geometry, which results in challenges to understanding the Earth's shallow structure. The decomposition of receiver functions into back-azimuth...
Tipo: Text
Palavras-chave: Crustal seismic anisotropy; Inherited structural heterogeneities; Crustal stress; Receiver function harmonics; Madagascar; Africa; EARS.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00686/79843/82668.pdf

Composition and antimicrobial activity of essential oils of Cinnamosma fragrans
Provedor de dados: 5
Autores: Randrianarivelo, Roger; Sarter, Sarnira; Odoux, Eric; Brat, Pierre; Lebrun, Marc; Romestand, Bernard; Menut, Chantal; Andrianoelisoa, Hanitriniaina Sahondra; Raherimandimby, Marson; Danthu, Pascal.
Essential oil samples of Cinnamosma fragrans from two regions in Madagascar, Tsaramandroso (38 samples) and Mariarano (30 samples), were analysed by GC/MS. Fifty-seven components were identified, accounting from 88.3% to 99.4% of the oils' composition. The major components were linalool (72.5 +/- 23.3%) in Tsaramandroso and 1,8-cineole (47.3 +/- 10.2%) in Mariarano. Samples B8 (95.8% linalool) from Tsaramandroso and B143 (71.6% 1,8-cineole) from Mariarano containing the highest proportions of the two main components identified, were selected to determine antimicrobial activities against 10 microbial strains. Bacillus subtilis and Staphylococcus aureus were the most sensitive strains to both oils. Minimum inhibitory concentration (MIC) values were lower for...
Tipo: Text
Palavras-chave: Madagascar; 1.8 Cineole; Linalool; Antimicrobial activity; Essential oil; Cinnamosma fragrans.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6242.pdf

Envenomation by the Malagasy colubrid snake Langaha madagascariensis
Provedor de dados: 80
Autores: D'Cruze,NC.
This report documents a case of envenomation by a Malagasy opisthoglyphous snake, Langaha madagascariensis. The snake bit the finger of a healthy adult man who was attempting to record its morphological measurements as part of a biodiversity survey which was being conducted in the extreme north of Madagascar. Symptoms of this case included severe local pain accompanied by observable swelling which lasted for several days. The present observations indicate that bite by L. madagascariensis potentially causes notable physiological effects in humans although the snake is generally calm and reluctant to bite unless provoked.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Madagascar; Colubrid; Langaha madagascariensis; Envenomation; Opisthoglyph; Duvernoy's glands.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000300014

Potential envenomation by the aglyphous pseudoxyrhophiine snake Leioheterodon madagascariensis and description of its dentition
Provedor de dados: 80
Autores: Razafimahatratra,Bertrand; Wang,Cynthia; Mori,Akira; Glaw,Frank.
Abstract We report on a case of potential envenomation caused by multiple bites by the aglyphous opisthodont snake Leioheterodon madagascariensis in the left thumb of a healthy adult man, which is among the most serious snakebites hitherto reported from Madagascar. The adult snake (total length &gt; 1 meter) was unusually aggressive before and during capture. The symptoms included extensive bleeding, severe local pain, and substantial swelling of the hand and the distal part of the lower arm. The swelling disappeared entirely after five days, but pain in the thumb (when moved) was recognizable even longer. Although L. madagascariensis is widespread and common in anthropogenic habitats in eastern and western Madagascar, this case report seems to be the...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Madagascar; Lamprophiidae; Pseudoxyrhophiinae; Leioheterodon madagascariensis; Envenomation; Dentition; Microcomputed tomography.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100413

Envenomation by the madagascan colubrid snake, Ithycyphus miniatus
Provedor de dados: 80
Autores: Mori,A.; Mizuta,T.
We report two cases of envenomation by a Madagascan opisthoglyphous snake, Ithycyphus miniatus. In both cases, the snake bit the finger of a human who was preparing an experiment by tying a string around the snake body. Symptoms of the first case included temporal severe local pain and extensive bleeding. In the second case, severe pain accompanying obvious local swelling was caused and lasted for several hours. The present observations indicate that bite by I. miniatus potentially causes serious physiological effects in humans although the snake is basically calm and reluctant to bite.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Madagascar; Colubrid; Ithycyphus miniatus; Envenomation; Opisthoglyph; Duvernoy's glands.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992006000300013

A new species of the genus Phaenocarpa Foerster from Madagascar (Hymenoptera: Braconidae: Alysiinae)
Provedor de dados: 16
Autores: Achterberg, C. van.
A new species of the genus Phaenocarpa Foerster (Hymenoptera: Braconidae: Alysiinae) with a short ovipositor, P. vanbruggeni spec. nov., from Madagascar is described and illustrated.
Tipo: Article / Letter to the editor
Palavras-chave: Hymenoptera; Braconidae; Alysiinae; Alysiini; Phaenocarpa; Afrotropical; Madagascar; 42.75.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/311946

Hydraires semi-profonds de Madagascar, (Coelenterata Hydrozoa), étude systematique et écologique
Provedor de dados: 16
Autores: Gravier-Bonnet, N.
The present collection was made on the south and west coasts of Madagascar between 90 en 465 meters depth and includes 17 species of calyptoblastic hydroids, belonging to six families: Campanulinidae, Lafoeidae, Campanulariidae, Syntheciidae, Sertulariidae and Plumulariidae. Twelve are recorded for the first time from Madagascar, while three of these are new for the Indian Ocean and one is described as new (Tulpa costata).   Endemic species represent half of the collection and are numerically more important than cosmopolitan, tropical-indopacific, and southern species. A comparative study of bathymetrical characteristics of species from Madagascar and around the world allows to distinguish three groups of species: deepsea species, which have a very wide...
Tipo: Article / Letter to the editor
Palavras-chave: Coelenterata; Hydrozoa; Madagascar; New species; Revision; Halicornaria ferlusi Billard; Temporary epizoism; 42.72.
Ano: 1979
URL: http://www.repository.naturalis.nl/record/323945

Macrurans (Crustacea, Decapoda) from the Lower Triassic (Olenekian) of the Ambilobé area (NW Madagascar)
Provedor de dados: 16
Autores: Garassino, Alessandro; Pasini, Giovanni; Teruzzi, Giorgio.
Fossil decapods of the Lower Triassic marine strata of Madagascar are reviewed. These display affiliation to the dendrobranchiates. These include Antrimpos madagascariensis, two species of Ifasya (I. madagascariensis and I. straeleni) and Ambilobeia karojoi.
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Decapoda; Triassic; Madagascar.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/534321

Resurrection of Hancea and lectotypification of Adisca (Euphorbiaceae)
Provedor de dados: 16
Autores: Sierra, S.E.C.; Kulju, K.K.M.; Veldkamp, J.F.; Welzen, P.C. van.
Based on phylogenetic studies with DNA sequence data, the formerly monotypic genus Cordemoya was recently expanded with 16 additional species previously assigned to Mallotus. However, the earliest legitimate generic name available is Hancea, and, therefore, Cordemoya is here reduced to Hancea (20 new combinations are proposed). Subsequently, the subgenus and section Diplochlamys from Asia are renamed to Hancea. Additionally, the genus Adisca is lectotypified with Adisca floribundus (= Mallotus floribundus).
Tipo: Article / Letter to the editor
Palavras-chave: Euphorbiaceae; Adisca; Cordemoya; Diplochlamys; Hancea; Mallotus; Madagascar; Malesia; Mascarenes.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/525717

Comparative tadpole morphology in three species of frogs of the genus Spinomantis (Amphibia: Mantellidae)
Provedor de dados: 16
Autores: Vejarano, S.; Thomas, M.; Vences, M.
We describe the tadpoles of three species of Malagasy frogs, classified in the genus Spinomantis, based on specimens identified by DNA barcoding. The tadpole of Spinomantis aglavei is a typical Orton type IV larva. The oral disc is not emarginated laterally, but has two mid-ventral folds and a labial tooth row formula of 3(2- 3)/2(1). The tadpole of S. phantasticus is similar, the oral disc being laterally emarginated and having one medial fold; LTRF is 3/3(1). A third species, S. cf. fimbriatus is also similar to the other two species; the oral disc is not laterally emarginated but has three medial folds and LTRF is 3(2-3)/3(1). One shared character is a median fold or emargination in the lower part of the oral disc, although the shape of this fold is...
Tipo: Article / Letter to the editor
Palavras-chave: Anura; Spinomantis aglavei; Spinomantis phantasticus; Spinomantis fi mbriatus; Madagascar; Systematics; DNA barcoding; 42.82.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/210775

Diversity, external morphology and ‘reverse taxonomy’ in the specialized tadpoles of Malagasy river bank frogs of the subgenus Ochthomantis (genus Mantidactylus)
Provedor de dados: 16
Autores: Randrianiaina, R.-D.; Strauß, A.; Glos, J.; Glaw, F.; Vences, M.
We provide detailed morphological descriptions of the tadpoles of Malagasy river bank frogs of the subgenera Ochthomantis and Maitsomantis (genus Mantidactylus, family Mantellidae), and data on relative abundance and habitat preferences of Ochthomantis species from Ranomafana National Park in southeastern Madagascar. Our study includes the tadpoles of six described and four undescribed candidate species. Eight of these larvae were previously unknown. Tadpoles were identified by DNA barcoding. Due to the very rudimentary taxonomic knowledge on Ochthomantis, we followed a ‘reverse taxonomy’ approach in which adult classification was to a great part determined on the basis of larval differences. By this procedure we even identified one candidate species whose...
Tipo: Article / Letter to the editor
Palavras-chave: Amphibia; Mantellidae; Madagascar; Tadpole morphology; DNA barcoding; 42.82.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/369710

Indian Ocean Mapouria species transferred to Psychotria (Rubiaceae–Psychotrieae)
Provedor de dados: 16
Autores: Davis, A.P.; Govaerts, R.; Briggs, M.
Mapouria Aubl. is a synonym of Psychotria L. In Madagascar and the Comoros there are 67 species of Mapouria that fall within the circumscription of Psychotria and correspondingly 64 species (67 taxa) require transfer to Psychotria. Thirty-seven new combinations and 30 new names are proposed; five lectotypes are designated.
Tipo: Article / Letter to the editor
Palavras-chave: Psychotrieae; Mapouria; Psychotria; Comoros; Madagascar.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/524768

Re-shaping Mallotus [Part 1]: Expanded circumscription and revision of the genus Cordemoya (Euphorbiaceae)
Provedor de dados: 16
Autores: Sierra, S.E.C.; Aparicio, M.; Kulju, K.K.M.; Fišer, Ž.; Welzen, P.C. van; Ham, R.W.J.M. van der.
A recent phylogenetic study based on DNA sequence data detected a well-supported clade of a number of Mallotus species together with the genus Cordemoya. This clade is distinct from the large Mallotus s.s. clade. In this paper, Cordemoya (formerly monotypic with C. integrifolia from the Mascarene Islands) is expanded with sixteen additional species previously assigned to Mallotus. Taxa transferred to Cordemoya are: Mallotus sections Hancea and Oliganthae from Asia and M. baillonianus, M. capuronii, and M. spinulosus from Madagascar. The genus Cordemoya can be distinguished from Mallotus s.s. by the presence of pollen with areolate ornamentation with scabrae (perforate/microreticulate ornamentation with scabrae in the sample of Mallotus s.s. studied up to...
Tipo: Article / Letter to the editor
Palavras-chave: Euphorbiaceae; Cordemoya; Deuteromallotus; Mallotus; Malesia; Madagascar; Mauritius; Réunion.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/525161

New combinations in Madagascan Vanguerieae (Rubiaceae) for the genera Psydrax, Pyrostria, and Rytigynia
Provedor de dados: 16
Autores: Davis, A.P.; Govaerts, R.; Bridson, D.M.
Twelve new combinations are proposed for Rubiaceae species from Madagascar: seven for Psydrax, three for Pyrostria, and two for Rytigynia.
Tipo: Article / Letter to the editor
Palavras-chave: Rubiaceae; Vanguerieae; Canthium; Psydrax; Pyrostria; Rytigynia; Madagascar.
Ano: 2007
URL: http://www.repository.naturalis.nl/record/524825

Collocherides bleptus n. sp. (Copepoda: Siphonostomatoida) associated with an intertidal ophiuroid in Madagascar
Provedor de dados: 16
Autores: Humes, Arthur G.
Collocherides bleptus n. sp. is associated with a brittle star, Macrophiothrix sp., at Nosy Bé, in northwestern Madagascar. The new copepod differs from its two congeners by its larger size and by having leg 5 in the female with an elongate distal segment bearing only two setae.
Tipo: Article / Letter to the editor
Palavras-chave: Copepoda; Siphonostomatoida; Madagascar; Ophiuroid; Associate; Collocherides.
Ano: 1993
URL: http://www.repository.naturalis.nl/record/504649

Synopsis of lichomolgid copepods (Poecilostomatoida) associated with soft corals (Alcyonacea) in the tropical Indo-Pacific
Provedor de dados: 16
Autores: Humes, A.G.
A synopsis of the 97 species of lichomolgid copepods known to be associated with tropical IndoPacific shallow-water alcyonaceans is given (Madagascar, New Caledonia, Moluccas, Philippines, and Enewetak Atoll). One new genus and 29 new species are included, distributed among the lichomolgid genera Acanthomolgus (2 new species), Alcyonomolgus (1), Colobomolgus (2), Critomolgus (3), Doridicola (5), Paradoridicola (7), Paramolgus (8), and Telestacicola (1). The alcyonacean hosts, numbering more than 100 species, include members of the genera Alcyonium, Anthelia, Capnella, Cespitularia, Cladiella, Dendronephthya, Heteroxenia, Lemnalia, Litophyton, Lobophytum, Nephthea, Paralemnalia, Parerythropodium, Sarcophyton, Sinularia, Siphonogorgia, Stereonephthya,...
Tipo: Article / Letter to the editor
Palavras-chave: Alcyonacea; Soft corals; Poecilostomatoida; Lichomolgidae; Copepoda; Associations; New species; Keys; Indo-Pacific; Madagascar; New Caledonia; Moluccas; Philippines; Enewetak Atoll.; 42.72.
Ano: 1990
URL: http://www.repository.naturalis.nl/record/317742

Systematic revision of the enigmatic Malagasy broad-headed frogs (Laurentomantis Dubois, 1980), and their phylogenetic position within the endemic mantellid radiation of Madagascar
Provedor de dados: 16
Autores: Vences, Miguel; Glaw, Frank; Andreone, Franco; Jesu, Riccardo; Schimmenti, Giovanni.
A revision of species included in the subgenus Laurentomantis (genus Mantidactylus) yielded new information about phylogeny, taxonomy, and biogeography of the endemic mantellid frog radiation in Madagascar. Four Laurentomantis species, distinguished by morphology and advertisement calls, are recognized: Mantidactylus (Laurentomantis) horridus (Northern and North- Western biogeographic regions), M. (L.) ventrimaculatus (South- East and East); M. (L.) malagasius (East); and the new species M. (L.) striatus (North-East). M. striatus and M. malagasius are probably sister species based on bioacoustic and morphological affinities. A tibial gland, so far unknown in anurans, is described in M. malagasius and M. horridus. A phylogenetic analysis of 54 mainly...
Tipo: Article / Letter to the editor
Palavras-chave: Amphibia; Mantellidae; Mantidactylus; Subgenus; Laurentomantis; Aglyptodactylus; Boophis; Laliostoma; Mantidactylus; Mantella; Systematics; Phylogeny; Radiation; New species; Tibial glands; Madagascar.
Ano: 2002
URL: http://www.repository.naturalis.nl/record/534312

Nomenclatural changes in the genus Bremeria (Rubiaceae)
Provedor de dados: 16
Autores: Davis, A.P.; Razafimandimbison, S.G.; Andriambololonera, S.
Five new combinations are made in the genus Bremeria: B. arachnocarpa, B. eriantha, B. scabrella, B. landia var. holosericea, and B. landia var. stadmanii. Bremeria gerrardii is conspecific with Gaertnera phanerophlebia, and thus excluded from Bremeria. Lectotypes are designated for Mussaenda erectiloba var. scabrella, M. stadmanii, and M. trichophlebia.
Tipo: Article / Letter to the editor
Palavras-chave: Bremeria; Gaertnera; Madagascar; Mascarenes; Mussaenda; Nomenclature; Rubiaceae.
Ano: 2011
URL: http://www.repository.naturalis.nl/record/525988

Two new species of Celtis (Celtidaceae) from Australia and Madagascar
Provedor de dados: 16
Autores: Sattarian, A.; Maesen, L.J.G. van der.
Celtis australiensis Sattarian is described from Australia and Celtis madagascariensis Sattarian is new for Madagascar. Both new Celtidaceae (formerly Ulmaceae–Celtidoideae) are illustrated with a photograph.
Tipo: Article / Letter to the editor
Palavras-chave: Celtis; Australia; Madagascar; Endocarp surface; Leaf margin; Leaf shape; Taxonomy.
Ano: 2005
URL: http://www.repository.naturalis.nl/record/525335

A note on the status of the enigmatic monotypic genus Adelosa (Labiatae)
Provedor de dados: 16
Autores: Kok, R.P.J. de.
The type specimen of Adelosa microphilla Blume has been examined and the results compared with the morphology of several other genera within the Labiatae. On the basis of this comparison it was concluded that Adelosa microphilla is most likely to be synonymous with a species of Clerodendrum L.
Tipo: Article / Letter to the editor
Palavras-chave: Adelosa; Clerodendrum; Madagascar.
Ano: 2001
URL: http://www.repository.naturalis.nl/record/525045

Insular species of Afrotropical freshwater crabs (Crustacea: Decapoda: Brachyura: Potamonautidae and Potamidae) with special reference to Madagascar and the Seychelles
Provedor de dados: 16
Autores: Cumberlidge, N.
The evolutionary relationships between island and mainland faunas of the 24 species of insular freshwater crabs in the Afrotropical region are reviewed in the light of phylogenetic studies. Twenty insular species of freshwater crabs are endemic, and four are also found on the neighboring mainland of Africa. The Atlantic Ocean islands of Sherbro, Bioko, Príncipe, and São Tomé support five species of Potamonautidae, while the Western Indian Ocean islands of the Seychelles, Zanzibar, Pemba, Mafia, and Madagascar together have 16 species of Potamonautidae, and Socotra has three species of Potamidae. Disjunct distributions of non-endemic insular species of Afrotropical freshwater crabs with conspecifics on the mainland are the result of past lower sea levels...
Tipo: Article / Letter to the editor
Palavras-chave: Freshwater crabs; Afrotropical islands; Madagascar; Seychelles; Socotra; 42.74.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/280474

Description of 11 new Astiella (Spermacoceae, Rubiaceae) species endemic to Madagascar
Provedor de dados: 16
Autores: Groeninckx, I.; Janssens, S.; Smets, E.; Verstraete, B.
Astiella is an herbaceous genus endemic to Madagascar, originally described with a single species A. delicatula Jovet. Molecular and morphological evidence place it in the tribe Spermacoceae s. lat. of Rubiaceae. During herbarium studies and fieldwork in Madagascar, 11 new Astiella species were identified and these are described here: A. antongilensis Groeninckx sp. nov., A. antsalovansis Groeninckx sp. nov., A. confusa Groeninckx sp. nov., A. deblockiae Groeninckx sp. nov., A. desseinii Groeninckx sp. nov., A. homolleae Groeninckx sp. nov., A. latifolia Groeninckx sp. nov., A. longifimbria Groeninckx sp. nov., A. perrieri Groeninckx sp. nov., A. pulla Groeninckx sp. nov., and A. tsaratanensis Groeninckx sp. nov. The genus Astiella now holds 12 species in...
Tipo: Article / Letter to the editor
Palavras-chave: Astiella; Endemism; Madagascar; Rubiaceae; Spermacoceae s. lat.
Ano: 2017
URL: http://www.repository.naturalis.nl/record/629097

First record of Calappoidea and Dromioidea from the Upper Cretaceous (Upper Maastrichtian) of NW Madagascar
Provedor de dados: 16
Autores: Garassino, Alessandro; Pasini, Giovanni.
The crustaceans from the marine Berivotra Formation, dated as late Cretaceous, from 50 km south of Mahajanga, Madagascar contains macrurans, brachyurans and thalassinideans. Two brachyuran families, Raninidae and Dynomenidae, were previously identified with the genera Notopocorystes, Caloxanthus, Titanocarcinus, Xanthosia, and Dromiopsis. Fragmentary material now also allows the recognition of Dromioidea, Calappoidea and Xanthoidea.
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Decapoda; Cretaceous; Madagascar.
Ano: 2003
URL: http://www.repository.naturalis.nl/record/534294

A revision of Madagascan Bertiera (Rubiaceae)
Provedor de dados: 16
Autores: Wittle, P.M.; Davis, A.P.
A taxonomic revision of the Madagascan representatives of the genus Bertiera is presented, to include three species, B. brevithyrsa, B. crinita and B. longithyrsa. A key to their identification is provided, each species is fully described, and summaries of distribution, habitat and ecology, and phenology are given; conservation assessments are also provided. Bertiera brevithyrsa is described as new species; B. crinita represents a new combination, and a lectotype is designated for this name.
Tipo: Article / Letter to the editor
Palavras-chave: Bertiera; Bertiereae; Conservation; IUCN Red List Categories; Madagascar; Rubiaceae.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/525748

A new name in Psychotria (Rubiaceae–Psychotrieae): Psychotria andramontaensis
Provedor de dados: 16
Autores: Davis, A.P.; Govaerts, R.
In order to provide an accepted name for the later homonym P. bremekampiana A.P.Davis &amp; Govaerts we propose a new name in Psychotria: P. andramontaensis A.P.Davis &amp; Govaerts.
Tipo: Article / Letter to the editor
Palavras-chave: Psychotrieae; Mapouria; Psychotria; Madagascar.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/524644

Notes on Indo-West Pacific Crustacea Decapoda III to IX
Provedor de dados: 16
Autores: Holthuis, L.B.
Seven short notes: (1) describing a new species of Macrobrachium from Madagascar, (2) synonymizing Chlorotocella leptorhynchus (Stimpson, 1860) with C. spinicaudus (H. Milne Edwards, 1837), (3) synonymizing Rhynchocinetes rugulosus Stimpson, 1860, with R. serratus (H. Milne Edwards, 1837), (4) establishing Cinetorhynchus, a new subgenus of Rhynchocinetes, (5) giving new locality and host records for Hippolyte commensalis, (6) establishing that dacqueti is the correct name for the western subspecies of Macrobrachium rosenbergii, (7) showing that Pandalus latirostris M.J. Rathbun, 1902 is the correct name for Pandalus kessleri Brashnikov, 1907.
Tipo: Article / Letter to the editor
Palavras-chave: Macrobrachium glabrum new species; Madagascar; Chlorotocella leptorhynchus = C. spinicauda; Rhynchocinetes rugulosus = R. serratus; Cinetorhynchus new subgenus of Rhynchocinetes; Hippolyte commensalis; Gulf of Aqaba; Commensal of Heteroxenia and Lithophyton; Lectotype for Palaemon dacqueti; Macrobrachium rosenbergii dacqueti (Sunier; 1925); Pandalus kessleri = P. latirostris; 42.74.
Ano: 1995
URL: http://www.repository.naturalis.nl/record/319216

Review of the family Halopterididae (Hydrozoa, Cnidaria)
Provedor de dados: 16
Autores: Schuchert, P.
All genera and species of the hydrozoan family Halopterididae are reviewed. Where material was available, species are described and figured and the extent of morphological variation is assessed as far as possible. The re-examined material includes samples from the Challenger, Siboga, and Galathea expeditions. Numerous types were re-examined and taxonomic revisions made where necessary. For several nominal species lectotypes are designated. Two new species are described: Antennella kiwiana from New Zealand and Halopteris platygonotheca, a wide spread species from the Indo-Pacific Ocean. Halopteris buskii var. peculiaris (Billard, 1913) is raised to species level as Halopteris peculiaris. Several species are sunk into synonymy: Plumularia balei Billard, 1911...
Tipo: Article / Letter to the editor
Palavras-chave: Plumularoidea; Halopterididae; Revision; Redescription; Types; New species; Mediterrane- an; England; France; Spain; U.S.A.; Caribbean; Brazil; South Africa; Madagascar; Indonesia; Australia; New Zealand; Hawaii.; 42.72.
Ano: 1997
URL: http://www.repository.naturalis.nl/record/317731

The French tropical purse-seine fishery, 1981-1997, with special emphasis on 1995-1997
Provedor de dados: 20
Autores: Pianet, R.
France has been one of the main fishing nations using industrial purse seiners in the Indian Ocean since the beginning of this fishery in the early 1980s. Its fleet operates over a wide area, covering the western side of the Indian Ocean, and centred around the Seychelles Islands. Catches are either transhipped to reefers in Victoria (Seychelles) and Antsiranana (Madagascar) or delivered to local canneries.
Tipo: Proceedings Paper
Palavras-chave: Fishery industry Tuna fisheries Purse seining Catch statistics ISW; Indian Ocean ISW; Seychelles ISW; Madagascar.
Ano: 1998
URL: http://hdl.handle.net/1834/48

The Food Retail Revolution in Poor Countries: Is It Coming or Is It Over?: Evidence From Madagascar
Provedor de dados: 31
Autores: Minten,   Bart.
Global retail chains are becoming increasingly dominant in the global food trade and their rise leads to dramatic impacts on agricultural supply chains and on small producers. However, the prospects and impacts of a food retail revolution in poor countries are not yet well understood. Here, we examine this question in Madagascar, a poor but stable country where global retailers have been present for over a decade. Our survey and analysis finds that while global retail chains sell better quality food, their prices are 40 to 90% higher, ceteris paribus, than those seen in traditional retail markets. In poor settings, characterized by high food price elasticities, a lack of willingness to pay for quality, and small retail margins, supermarkets appear to set...
Tipo: Working or Discussion Paper
Palavras-chave: Food retail; Supermarkets; Food quality; Africa; Madagascar; Agribusiness.
Ano: 2007
URL: http://purl.umn.edu/42394

INFRASTRUCTURE, MARKET ACCESS, AND AGRICULTURAL PRICES: EVIDENCE FROM MADAGASCAR
Provedor de dados: 31
Autores: Minten,   Bart.
The effect of recent agricultural market reforms in many developing countries is often measured through tests for market integration by analyzing co-variation of food prices. However, market integration studies often fail to link the discovery of the lack of integration to causal factors. This analysis documents and relates price variation to structural determinants in the case of Madagascar. The spatial variability between communities is linked to the distance to a paved road, the quality of the road, access to soft infrastructure, and the level of competition between traders. Differences in seasonal variation are mainly related to the differential opportunity costs of capital in rice villages and to hard infrastructure in non-rice villages. Communities...
Tipo: Working or Discussion Paper
Palavras-chave: Markets; Prices; Price regulation; Madagascar; Economic Infrastructure; International Development.
Ano: 1999
URL: http://purl.umn.edu/100154

The rural non-farm economy, livelihood strategies and household welfare
Provedor de dados: 31
Autores: Stifel,   David.
This paper examines the relationship between rural non-farm employment and household welfare using nationally representative data from Madagascar. It focuses on labor outcomes in the context of household livelihood strategies that include farm and non-farm income earning opportunities. It identifies distinct household livelihood strategies that can be ordered in welfare terms, and estimates multinomial logit models to assess the extent of the barriers to choosing dominant strategies. It finds that high-return non-farm activities provide an important pathway out of poverty, but that barriers such as lack of (a) education, (b) formal credit and (c) access to telecommunications restrict participation in such activities. Individual employment choice models and...
Tipo: Journal Article
Palavras-chave: Non-farm; Livelihood strategy; Diversification; Labor; Welfare; Madagascar; Community/Rural/Urban Development.
Ano: 2010
URL: http://purl.umn.edu/93887

Reconciling household surveys and national accounts data using a cross entropy estimation method
Provedor de dados: 31
Autores: Robilliard,   Anne-Sophie; Robinson,   Sherman.
"November 1999." Includes bibliographical references (p. 12-13). Published as: Robilliard, Anne-Sophie; Robinson, Sherman. 2003. Reconciling household surveys and national accounts data using a cross entropy estimation method. Review of Income and Wealth 49(3): 395-406.
Tipo: Working or Discussion Paper
Palavras-chave: National income--Accounting; Household surveys; Madagascar; Consumer/Household Economics.
Ano: 1999
URL: http://purl.umn.edu/97524

Alternative to Disincentive Rice Producer Prices in Madagascar: Case Study in Alaotra Prefecture and Bongolava Prefecture
Provedor de dados: 31
Autores: Ralandison,   Tsilavo; Shiratake,   Yoshiharu.
This study identifies the reasons for low producer prices of rice that have not covered its production costs for many years in Madagascar. The following points will be discussed: the farmers’ marketing conditions and the rural rice market structure, including the functions of each intervening trader preceding rice distribution in urban centers. The study also assesses current functions of the agricultural farmer cooperative: an organization expected to enable the establishment of fair trade in the domestic rice market. The data come from interviews conducted with 120 farmers, 20 traders, and the survey of the overall cooperative associations in two prefectures and main rice suppliers of the capital city. The analysis reveals that farmers were often...
Tipo: Conference Paper or Presentation
Palavras-chave: Cooperatives; Madagascar; Markets; Rice; Agricultural and Food Policy; Consumer/Household Economics; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Institutional and Behavioral Economics; International Relations/Trade; Marketing; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods.
Ano: 2008
URL: http://purl.umn.edu/52005

The Structural Estimation of Principal-Agent Models by Least Squares: Evidence from Land Rental Markets in Madagascar (PowerPoint)
Provedor de dados: 31
Autores: Brown,   Zachary S.; Bellemare,   Marc F.
Tipo: Conference Paper or Presentation
Palavras-chave: Modeling; Least squares; Madagascar; Land rental markets; Risk and Uncertainty.
Ano: 2009
URL: http://purl.umn.edu/48908

Determinants of Repayment Performance in Credit Groups: The Role of Program Design, Intra-group Risk Pooling, and Social Cohesion in Madagascar
Provedor de dados: 31
Autores: Zeller,   Manfred.
Group lending has received much attention in recent years because of its perceived potential in providing financial services to poor households that lack traditional collateral. The analysis in this paper focuses on the effects of program design, community and group characteristics on the repayment performance of groups, using a data set on groups from six different lending programs in Madagascar. The results show that socially cohesive groups pool risks by diversifying the members’ asset portfolio so that their repayment performance is improved even in communities with high-risk exposure.
Tipo: Working or Discussion Paper
Palavras-chave: Community Participation; Madagascar; Credit; Financial Economics.
Ano: 1996
URL: http://purl.umn.edu/97299

Myospila bekilyana (Séguy) (Diptera, Muscidae, Mydaeinae): redescription of male and female and description of terminalia
Provedor de dados: 92
Autores: Couri,Márcia S.
Myospila bekilyana Séguy (Diptera, Muscidae, Mydaeainae) is an endemic species from Madagascar. Since the original description, the species has been referred in literature only in catalogues. A material recently collected by the Madagascar Arthropod Biodiversity project, mostly deposited at the California Academy of Sciences collection enabled the exam of a large series of this species. Male and female are herein redescribed and the terminalia of both sexes are described and illustrated for the first time. The paper also records Myospila as a new host for Stylogaster Macquart (Diptera, Conopidae).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Madagascar; Morphology; Parasite; Taxonomy.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262008000300003

New species of Cyamops (Diptera: Opomyzoidea: Periscelididae) from the old and new world tropics
Provedor de dados: 103
Autores: Rung,Alessandra; Ale-Rocha,Rosaly.
Two new species of Cyamops Melander are described, one from the Afrotropical and one from the Neotropical Region. The newly described species are (type locality in parenthesis): Cyamops mathisi sp. nov. (Province Fianarantsoa, Madagascar) and Cyamops manauensis sp. nov. (state of Amazonas, Brazil). Both species can be separated from congeners based on characters of the male genitalia, particularly the shape of the surstyli. A new country, the Ivory Coast, is added to the distribution records of Cyamops nigeriensis, previously known only from Nigeria and Namibia. Updated keys to the Afrotropical and Neotropical species of the genus are also given.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Afrotropical Region; Brazil; Madagascar; Neotropical Region; Stenomicrinae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000600014