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3. Growth and ecophysiological response in juvenile clones of Guadua (Guaduinae: Bambusoideae) cultivated in an altered lowland tropical region

Creator:
Ely, F., Araque, O., and Jaimez, R.
Format:
print, bez média, and svazek
Type:
model:article and TEXT
Subject:
bambus, fotosyntéza, Bamboo, photosynthesis, Venezuela, chlorofyl a fluorescence, vodní potenciál listu, chlorophyll a fluorescence, leaf water potentials, 2, and 581
Language:
Multiple languages
Description:
Guadua amplexifolia and Guadua angustifolia are the most promising timber substitutes amongst American bamboos due to their outstanding dimensions and structural properties. Despite the commercial potential of these species, there are few studies on the survival and adaptability of juveniles in plantations. The present study dealt with survival, growth, and ecophysiological response of juvenile clonal plants of these species, cultivated in abandoned pastures in Mérida, Venezuela. Survivorship, growth (height and culm diameter), and ecophysiological parameters were monitored the first year during wet and dry seasons. Survival rates were high in both species (95% in G. amplexifolia and 89% in G. angustifolia). Midday leaf water potentials decreased in both species during dry months (-1.28 to-2.72 MPa in G. amplexifolia and-1.67 to-2.37 MPa in G. angustifolia, respectively). Net photosynthetic rates measured during wet [16.57 ± 1.40 and 13.68 ± 2.40 μmol(CO2) m-2 s-1, respectively] and dry seasons [12.19 ± 2.82 and 8.12 ± 1.81 μmol(CO2) m-2 s-1, respectively], demonstrated that G. amplexifolia maintained consistently higher photosynthetic rates compared to G. angustifolia, which could explain the higher growth rates of the former. Similar trends were observed for stomatal conductance, transpiration, water-use efficiency, electron transport rate, and photochemical quenching of PSII. G. angustifolia maintained higher nonphotochemical quenching as well as a higher consumption of electrons per molecule of CO2 fixed, indicating a lower photosynthetic efficiency. The maximal photochemical efficiency of PSII (0.73-0.76) suggested that neither of these species suffered from photoinhibition, despite persistently high radiation and air temperatures at the study site., F. Ely, O. Araque, R. Jaimez., and Obsahuje bibliografii
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Guyanema longispiculum sp. n. (Nematoda: Dracunculoidea) from Loricariichthys brunneus (Pisces) in Venezuela

Creator:
Moravec, František, Prouza, Antonín, and Royero, Ramiro
Format:
print
Type:
model:internalpart and TEXT
Subject:
Guyanema, nematode, parasite, Loricariichthys, and Venezuela
Language:
English
Description:
A new nematode species, Guyanema longispiculum sp. n. is described from the abdominal cavity of the freshwater armoured catfish, Loricariichthys hrunneus (Hancock), from two localities in western Venezuela. It differs from all hitherto known members of the genus in having unusually long spicules (0.480-0.609 mm) and from individual species also by other morphological and biometrical features. It is characterized by the presence of eight cephalic papillae arranged in two circlets, localization of deirids anterior to the nerve ring, a conical, undivided tip of the tail in both sexes, four pairs of preanal and six pairs of postanal papillae in the male, and a markedly elevated vulva in the female. A key to species of Guyanema is presented.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

5. J. A. Comenio y el mundo hispano-americano /

Creator:
Polišenský, Josef,
Type:
text and články
Subject:
Mezinárodní vztahy, světová politika, Komenský, Jan Amos,, komeniologie, vztahy česko-latinskoamerické, překlady literární, Venezuela, Španělsko, světové dějiny 1789-1918, české země 1620-1740, školství, pedagogika, učitelé, péče o mládež, and zahraniční politika, mezinárodní vztahy
Language:
Spanish
Description:
Komenský a hispano-americký svět.
Rights:
unknown

6. Oswaldocruzia venezuelensis sp. n. (Nematoda: Trichostrongylina, Molineoidea), a parasite of Bufo marinus from Venezuela

Creator:
Slimane, Badreddine Ben, Gurrero, R., and Durette-Desset, Marie-Claude
Format:
print
Type:
model:internalpart and TEXT
Subject:
Oswaldocruzia venezuelensis sp. n., Nematoda, Trichostrongylina, Bufonidae, and Venezuela
Language:
English
Description:
A new species of Oswaldocruzia Travassos, 1917, a parasite of Bufo marinus L. from Venezuela, is described. Like most Neotropical Oswaldocruzia, Oswaldocruzia venezuelensis sp. n. is characterized by spicules with three principal branches: blade, shoe and fork, and by a division of the fork within the distal third of the spicule length. O. vuucheri Ben Slimane et Durette-Desset, 1993 is the most closely related species due to its caudal bursa of type II and its cervical alae of the same shape but it differs in the following characters: the position of the papillae of rays 4 situated nearer the papillae of rays 3 rather than rays 5, a higher percentage of the ridges in the oesophageal region, the cervical alae three times longer and sharp and the spicular fork divided less deeply.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

8. Redescription of Proteocephalus macrophallus, a parasite of Čichla ocellaris (Pisces: Cichlidae) from South America

Creator:
Scholz, Tomáš, de Chambrier, Alain, Prouza, Antonín, and Royero, Ramiro
Format:
print
Type:
model:internalpart and TEXT
Subject:
Proteocephalus macrophallus, Proteocephalidae, Cichla ocellaris, Cichlidae, and Venezuela
Language:
English
Description:
Proteocephalus macrophallus (Diesing, 1850), considered by several authors as species inquireruia, was recently found in Cichla ocellaris in Venezuela. This material is compared with voucher specimens from the same host (C. ocellaris) from Brazil, identified and redescribed as P. macrophallus by Woodland (1933). The specific status of P. macrophallus is confirmed. This species is characterized by: 1 ) the shape of the body, which is wide and short, 2) the absence of a neck, 3) the distribution of the vitelline follicles, which converge posteriorly to the ovarian lobes, and 4) the structure of the uterus, which is evacuated in the last proglottides and transformed to thick-walled diverticles apparently separated each from other. A neotype is designated.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

9. Some nematodes of freshwater fishes in Venezuela

Creator:
Moravec, František, Prouza, Antonín, and Royero, Ramiro
Format:
print
Type:
model:internalpart and TEXT
Subject:
nematodes, parasites, fish, and Venezuela
Language:
English
Description:
The present paper comprises a systematic survey of nematodes found in 88 specimens of 24 species of freshwater fishes in Venezuela in 1992 and 1994. The following 13 species of nematodes were recorded: Adults: Guyanema longispiculum Moravec, Prouza et Royero, 1996, Guyunema sp., Procamallanus (Spiracamallanus) inupinatus Travassos, Artigas et Pereira, 1928, P. (S.) krameri (Petter, 1974) comb, n., P. (S.) pintoi (Kohn et Fernandes, 1988) comb, n., Procamallanus (Spiracamallanus) sp., Ruphidascaris (Sprentascaris) mahnerti (Petter et Cassone, 1984). Larvae: Anisakidae gen. sp., Brevimullicaecum sp., Ctmtracaecum sp. Type 1, Contracaecum sp. Type 2, Contracaecum sp. Type 3, Eustrongylides sp. All these parasites are reported from Venezuela for the first time and all findings represent new host records. Brevimulticae-cum larvae are reported from fishes for the first time. Almost all parasites are briefly described and illustrated and problems concerning their morphology, taxonomy, hosts and geographical distribution are discussed. A new name, Terranova diazungriai nom. nov. is proposed for T. caballeroi Diaz-Ungrfa, 1968 (a junior homonym of T. caballeroi Baruš et Coy Otero, 1966).
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public