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Spatial colonization by feral domestic cats Felis catus of former wildcat Felis silvestris silvestris home ranges

100%

Sarmento P., Cruz J., Eira C., Fonseca C.

Acta Theriologica

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2009

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tom 54

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nr 1

31-38

Presently, wildcatFelis silvestris silvestris Schreber, 1777 populations are fragmented and rapidly declining in most of Europe. Although habitat destruction possibly constitutes the most serious threat to wildcat survival, hybridisation with feral domestic cats is also a critical problem. However, the mechanisms that allow domestic cats to colonise former wild cat home ranges are yet unclear. The present paper describes the decrease of typical phenotypic wildcats and the increase of phenotypic domestic cats in a remote wild area of Portugal (Serra da Malcata). A field survey using box-traps and radio-tracking between 1998 and 2001 revealed that wildcats were widespread in the study area and no domestic cats were present. A second survey using camera traps between 2005 and 2007 revealed only one wildcat whereas four typical domestic phenotype individuals were photographed. The present study clearly emphasizes the need for urgent measures aimed at preserving wildcat populations. These measures should include a national census of the species and an extensive monitoring of genetic integrity of wildcat populations, followed by the elaboration of a wildcat conservation action plan.

2

Spermatological characters of Acanthobothrium crassicolle Wedl, 1855 (Tetraphyllidea, Onchobothriidae), a parasite of the common stingray Dasyatis pastinaca

100%

Marigo A. M., Eira C., Ba C. T., Miquel J.

Acta Parasitologica

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2011

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tom 56

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nr 2

We describe the spermiogenesis process and the ultrastructural characters of the spermatozoon of Acanthobothrium crassicolle by means of transmission electron microscopy, including cytochemical analysis for glycogen. Spermiogenesis in A. crassicolle begins with the formation of the differentiation zone that contains two centrioles associated with striated rootlets and an intercentriolar body. The latter is formed by one electron-dense layer. The centrioles develop into two free flagella that first grow orthogonally to a median cytoplasmic process and then undergo flagellar rotation becoming parallel to that median cytoplasmic process. After flagellar rotation only one of the flagella completes its growth and both short and long flagella undergo proximodistal fusion with the median cytoplasmic process. In the final stages of spermiogenesis, the nucleus becomes filiform and migrates into the spermatid body. Later, the ring of arched membranes constricts and the spermatozoon is liberated from the residual cytoplasm. The ultrastructural organization of the spermatozoon of A. crassicolle follows the general pattern of spermatozoa of the other Tetraphyllidea-Onchobothriidae species, but exhibits some differences. It is filiform, tapered at both extremities and lacks mitochondrion. It contains two axonemes of unequal length showing the 9 + “1“ pattern of Trepaxonemata, a nucleus, parallel cortical microtubules and electron-dense granules of glycogen. The anterior extremity of the male gamete contains a single crested body surrounding a thin and long apical cone. This type of apical cone has never been described in a tetraphyllidean spermatozoon. Another particularity is the presence of a single electron-dense microtubule at the vertex of the crested body.

3

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Origin and ultrastructure of the outer coat surrounding mature eggs of Mosgovoyia ctenoides (Cestoda, Anoplocephalidae)

100%

Mlocicki D., Swiderski Z., Miquel J., Eira C.

Wiadomości Parazytologiczne. Suplement

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2007

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tom 53

4

Ultrastructure of the mature spermatozoon in the genus Fasciola L., 1758: a comparative analysis of F. hepatica L., 1758 and F. gigantica Cobbold, 1856

100%

Miquel J., Ndiaye P. I., Eira C., Marchand B.

Wiadomości Parazytologiczne. Suplement

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2004

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tom 50

5

Ultrastructural and cytochemical study on vitellogenesis in the diphyllidean cestode Echinobothrium euterpes (Echinobothriidae) and its phylogenetical implications

100%

Swiderski Z., Mackiewicz J. S., Eira C., Miquel J.

Acta Parasitologica

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2011

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tom 56

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nr 2

The first description of vitellogenesis in the Diphyllidea is presented in this paper. Though the type of vitellogenesis and mature vitellocyte in Echinobothrium euterpes appear to be unique among the Eucestoda, however, they somewhat resemble that observed in the two orders of the lower cestodes, Tetraphyllidea and Proteocephalidea. Vitellocyte maturation is characterized by: (1) an increase in cell volume; (2) extensive development of short, parallel, frequently concentric cisternae of GER that produce dense proteinaceous granules; (3) development of Golgi complexes engaged in packaging this material; (4) progressive formation of saturated lipid droplets; their continuous enlargement and fusion; (5) formation of small accumulations of glycogen particles scattered between and among lipid droplets in the cytoplasm of maturing vitellocytes; (6) concentration of dense proteinaceous granules in the peripheral layer of cytoplasm, around the cell plasma membrane; and (7) vacuolization of cytoplasm of mature vitellocytes accompanied by a rapid increase in its volume. A new, unreported type of dense proteinaceous granules, situated around the limiting plasma membranes of mature vitellocytes, is described. Vitellogenesis evidently differs from that with typical shell-globules and shell-globule clusters previously reported in other taxa of lower cestodes. Cytochemical staining with periodic acidthiosemicarbazide-silver proteinate for glycogen indicates a strongly positive reaction for glycogen particles between and around large unsaturated lipid droplets of the maturing and mature vitellocytes. Some hypotheses concerning the interrelationship between this pattern of vitellogenesis, possible mode of egg formation, embryonic development and diphyllidean life cycle, and their phylogenetic implications are drawn and discussed.

6

Natural infection of Oryctolagus cuniculus [Lagomorpha, Leporidae] by Gongylonema neoplasticum [Nematoda, Gongylonematidae] in Portugal

100%

Eira C., Miquel J., Vingada J., Torres J.

Acta Parasitologica

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2006

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tom 51

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nr 2

Gongylonema neoplasticum was identified in the oesophagus of 14 wild rabbits (Oryctolagus cuniculus) from Portugal. This is the first record of Gongylonema neoplasticum in a naturally infected lagomorph species in Europe. This paper presents the most relevant measurements of adult worms and some of their surface features seen by scanning electron microscopy. Epidemiological aspects of G. neoplasticum such as geographical distribution, host spectrum and biological features are discussed.

7

Ecological aspects influencing the helminth community of the wood mouse Apodemus sylvaticus in Dunas de Mira, Portugal

100%

Eira C., Torres J., Vingada J., Miquel J.

Acta Parasitologica

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2006

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tom 51

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nr 4

This paper presents the first extensive data on the helminth community of the wood mouse Apodemus sylvaticus in a coastal sand dune area in Portugal. The 557 hosts analysed in this study were trapped seasonally between autumn 2002 and summer 2005 across 6 habitat types. Twelve helminth species were detected among which, Taenia parva larvae, Angiostrongylus dujardini, Heligmosomoides polygyrus, Syphacia stroma and S. frederici constitute the component species, accounting for 98.7% of all worms. H. polygyrus was the most prevalent helminth parasite. Species richness varied according to habitat and season. The highest species richness was found in sand dunes during winter whereas the lowest was detected along lake margins also during the winter. Some differences in prevalence and mean intensity values were found in relation to year (T. parva larvae and H. polygyrus), habitat (A. dujardini), season (T. parva larvae, H. polygyrus, A. dujardini and S. stroma) and host sex (T. parva larvae and S. stroma). These differences are discussed both in view of the host’s biology and habitat characteristics.

8

Cadmium and lead concentrations in Moniliformis moniliformis (Acanthocephala) and Rodentolepis microstoma (Cestoda), and in their definitive hosts, Rattus rattus and Mus domesticus in El Hierro (Canary Archipelago, Spain)

88%

Torres J., Eira C., Miquel J., Foronda P., Feliu C.

Acta Parasitologica

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2011

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tom 56

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nr 3

Information on parasites of vertebrates living in terrestrial ecosystems as monitoring tools for heavy metal environmental pollution is scarce. The present study evaluates the potential suitability of the models Rattus rattus/Moniliformis moniliformis and Mus domesticus/Rodentolepis microstoma as promising bioindicator systems for cadmium and lead pollutions under natural conditions. The highest level of cadmium was found in one specimen of M. moniliformis (335.2 ng g−1 wet weight) and the average concentration of Cd in the acanthocephalan was significantly higher than values found in R. rattus liver and kidney tissues. The maximum concentration of lead occurred in one specimen of R. microstoma (567.4 ng g−1 wet weight) and the average concentration of Pb in the cestode was significantly higher than values found in M. domesticus liver, kidney and muscle tissues. The present results allow proposing both models as promising biomonitoring systems to evaluate environmental cadmium pollution (mainly R. rattus/M. moniliformis) and lead contamination (especially M. domesticus/R. microstoma) in terrestrial nonurban habitats.

9

Total mercury and selenium concentrations in Sarpa salpa and Balistes capriscus and in their respective Digenean endoparasites Robphildollfusium fractum and Neoapocreadium chabaudi from Tunisia

88%

Torres J., Kacem H., Eira C., Neifar L., Miquel J.

Acta Parasitologica

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2014

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tom 59

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nr 4

The present study reports the levels of mercury and selenium in Sarpa salpa and Balistes capriscus collected along the coast of Mahdia and Sfax (Tunisia). The systems constituted by S. salpa and Robphildollfusium fractum and by B. capriscus and Neoapocreadium chabaudi were tested as potential bioindicators to monitor environmental Hg pollution in marine ecosystems. Mercury and selenium concentrations were assessed in kidney, liver and muscle of 51 S. salpa and of 45 B. capriscus as well as in their respective endoparasites R. fractum and N. chabaudi. The Se:Hg molar ratios were evaluated for both species across the study areas. Surprisingly, the Se:Hg molar ratio in B. capriscus muscle from Mahdia is significantly lower than in Sfax. Our results indicate that some parasites may also be implicated in the amount of Se and Hg available in tissues and therefore contribute to oscillations of the Se:Hg molar ratios. In the model involving the carnivorous species (B. capriscus), the 5.1-times higher levels of mercury in N. chabaudi than in B. capriscus muscle in Sfax enable this fluke to be a sensitive biomonitoring tool for Hg pollution. The present results confirm that the habitual consumption of S. salpa should not suppose any potential health risk for Tunisian people. On the other hand, the consumption of B. capriscus may be of concern and further monitoring is advisable, since the Hg average concentration in Mahdia was above the maximum allowed Hg concentration in the edible portion of fish fixed by the European Union.

10

The system Tetrabothrius bassani (Tetrabothriidae)- Morus bassanus (Sulidae) as a bioindicator of marine heavy metal pollution

88%

Mendes P., Eira C., Vingada J., Miquel J., Torres J.

Acta Parasitologica

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2013

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tom 58

|

nr 1

Helminths are known to accumulate higher amounts of certain elements than their hosts. The present study assesses the accumulation of heavy metals in Tetrabothrius bassani and in its host, the Atlantic gannet (Morus bassanus) found dead due to bycatch along the seashore in the centre of Portugal. Samples of kidney, liver and pectoral muscle of 23 infected gannets, as well as specimens of T. bassani were analysed for As, Cd, Cr, Cu, Hg, Mn, Pb, Se and Zn by ICP-MS. The evidenced lower concentrations of Cr and Pb in tissues of gannets in comparison to an earlier study performed in the same area may reveal a change in the diet of M. bassanus between both study periods. The highest bioaccumulation factor was obtained for Cd with a 12.7-times higher concentration in the cestode than in gannet muscle. Lead concentration in T. bassani was 6.9-times higher than in kidney tissue, 8.5-times higher than in muscle and 9.5-times higher than in liver of M. bassanus. The cestode/seabird system T. bassani/M. bassanus can be considered a promising bioindicator system to monitor environmental Cd and Pb pollution in marine ecosystems.

11

Ultrastructure of spermatogenesis of the anoplocephalid cestode Gallegoides arfaai [Mobedi et Ghadirian, 1977] Tenora et Mas-Coma, 1978

88%

Miquel J., Swiderski Z., Mlocicki D., Eira C., Marchand B.

Acta Parasitologica

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2005

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tom 50

|

nr 2

Spermatogenesis in Gallegoides arfaai is similar to that described for other cestode species. Six incomplete synchronic cytokineses occur: four mitotic and two meiotic cell divisions. The primary spermatogonium divides forming two secondary spermatogonia. All further divisions occur simultaneously, resulting in a rosette of four tertiary, then eight quaternary spermatogonia and sixteen primary spermatocytes. The first meiotic division forms thirty-two secondary spermatocytes and after the second meiotic division sixty-four spermatids are formed. Spermiogenesis begins with the formation of a differentiation zone in the form of a conical projection of cytoplasm delimited by a ring of arching membranes. Within this area there are two centrioles, a centriolar adjunct and vestigial striated rootlets. During spermiogenesis, only one of the centrioles develops an axoneme that grows directly into the cytoplasmic extension. The other centriole remains oriented in a cytoplasmic bud and posteriorly aborts. The nucleus elongates and moves into the cytoplasmic extension. Granular material present in each sperm originates from electron-dense material present in the periphery of the spermatid. In the final stage of spermiogenesis two crest-like bodies appear at the Bâse of the spermatid. Finally, the ring of arching membranes constricts and the young spermatozoon detaches from the residual cytoplasm. In order to increase homogeneity in the designation of the non-typical striated rootlets previously described, in this study we propose to group them under the common designation of "vestigial striated rootlets" and its importance is discussed according to previous findings of related structures in other cyclophyllideans.

12

Ultrastructure of the tegument of the anoplocephalid cestode Mosgovoyia ctenoides [Railliet, 1890] Beveridge, 1978

88%

Mlocicki D., Eira C., Zebrowska J., Miquel J., Swiderski Z.

Wiadomości Parazytologiczne

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2004

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tom 50

|

nr 3

13

Influence of reservoirs created by small dams on the activity of bats

76%

Hintze F., Duro V., Carvalho J. C., Eira C., Rodrigues P. C., Vingada J.

Acta Chiropterologica

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2016

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tom 18

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nr 2

Freshwater systems have been profoundly changed by the construction of dams, and the influence of dams on bat activity is poorly understood. In this study, we analyzed the effects of small dams along mountain streams on local bat communities. This work was carried out in five small streams located in the NE of Portugal using bioacoustic surveys during the summer of 2011. The present study confirms that, in the northeast areas of Portugal, the majority of bat species use artificial bodies of water for either drinking or foraging, but species differed in terms of their activity levels over the reservoirs when compared with intact stream habitats. As predicted, small dams in the study area were important centers of overall bat activity relative to other sampling areas. At the same time, feeding activity was also higher in the flooded areas. We also found that Pipistrellus pipistrellus, Myotis daubentonii, Pipistrellus kuhlii, Pipistrellus pygmaeus/Miniopterus schreibersii, Tadarida teniotis and Nyctalus leisleri/Eptesicus serotinus benefited from the presence of dam reservoirs. Hypsugo savii activity was also mostly recorded at reservoir points. However, the highest number of endangered and rare species was recorded at an intact stream habitat. This result emphasizes the relevance of riparian habitats for bats, especially for the most endangered species. The relationship between dam availability, riparian quality and bat diversity suggested that the changes in the streams promoted by damming could affect both bat species richness and activity levels, leading to changes in the overall composition of the bat community. In conclusion, this study found that small reservoirs have a significant influence on bat activity. However, dams appear to primarily benefit the most common species, while the endangered species were associated with riparian habitats. Therefore, for conservation proposes of the local bat community, riparian areas appear to be more important than reservoirs. Thus, this study provides a better understanding of the impact of small dams on bats contributing to the future management and conservation of bat species.

14

Characteristics of the helminthfauna of the wood mouse (Apodemus sylvaticus) from an urban waste dumping site in Catalonia (ne of Spain)

76%

Torres J., Peig J., De Lapuente J., Eira C., Borras M., Nadal J.

Wiadomości Parazytologiczne. Suplement

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2004

|

tom 50

15

Post-embryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 [Cyclophyllidea, Taeniidae]

76%

Swiderski Z., Miquel J., Mlocicki D., Georgiev B. B., Eira C., Grytner-Ziecina B., Feliu C.

Acta Parasitologica

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2007

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tom 52

|

nr 1

Post-embryonic development and fully-formed polycephalic larvae of Taenia parva Baer, 1926 were examined by light (LM) and transmission electron microscopy (TEM). Three developmental stages were recognised: (1) an early stage of exogenous budding at the surface of the central vesicle; (2) a stage of polycephalic cyst development accompanied by segmentation of the growing larval strobile and an obvious decrease in the size of the central vesicle; (3) fully-formed larval strobile and invaginated scoleces. In fully-developed encysted polycephalic larvae, there are usually 14–24 segmented larval strobilae, each terminating with an invaginated scolex; larval strobilae arise from a common central vesicle and remain attached posterior to it during the entire development. The number of segments varies between 109 and 120 per larval strobila. The polycephalic larvae examined closely resemble the strobilocercus type of taeniid larvae. The structure of developing and fully-formed larvae was examined by TEM. The tegument, scolex, subtegumental musculature of the strobilar segments, protonephridial system, calcareous corpuscles and medullary parenchyma of larvae exhibit general similarity with the same structures in adults at both LM and TEM levels. The morphogenesis of the larva of T. parva is compared with that of the polycephalic larvae of other Taenia spp. (T. krepkogorski, T. twitchelli and T. endothoracica) and with other asexually-multiplying cestode larvae (mesocestoidids, hymenolepidids and dilepidids).

16

Vitellogenesis in Mosgovoyia ctenoides [Railliet, 1890] Beveridge, 1978 [Cyclophyllidea, Anoplocephalidae]

76%

Swiderski Z., Mlocicki D., Eira C., Miquel J., Grytner-Ziecina B., Mackiewicz J. S.

Acta Parasitologica

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2005

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tom 50

|

nr 4

Vitellogenesis in Mosgovoyia ctenoides was examined by means of transmission electron microscopy. Mature vitelline follicles consist of cells in various stages of development, progressing from immature cells of gonial type near the periphery to mature vitellocytes towards the centre. Maturation is characterized by: (1) increase in cell volume; (2) extensive development of large parallel cisternae of granular endoplasmic reticulum (GER), the vitelline material producing units; (3) development of Golgi complexes engaged in vitelline material package; (4) continuous fusion of small vesicles into larger vitelline vesicles and fusion of these into a single very large vesicle, which is characteristic for mature vitellocytes of this tapeworm. Vitellogenesis in M ctenoides is compared with that in other cestodes. Some conclusions concerning the interrelationship between the vitellogenesis pattern and the type of embryogenesis are drawn and discussed.

17

Ultrastructure of oncospheral hook formation in the cestode Mosgovoyia ctenoides [Railliet, 1890] Beveridge, 1978 [Cyclophyllidea, Anoplocephalidae]

76%

Mlocicki D., Swiderski Z., Conn D. B., Eira C., Miquel J., Baranowska-Korczyc A.

Acta Parasitologica

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2005

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tom 50

|

nr 2

The ultrastructure of oncospheral hook formation in the anoplocephalid cestode Mosgovoyia ctenoides (Railliet, 1890) Beveridge, 1978, is described. The hook morphogenesis takes place inside the six symmetrically arranged hook-forming cells, the oncoblasts. They show characteristic large nuclei of semilunar shape, localized at one pole of the embryo. At the beginning of the hook formation, the "hook-forming centre" appears in the cytoplasmic part of each oncoblast. It consists of numerous free ribosomes and polyribosomes surrounded by several mitochondria and Golgi complexes. The hook-forming centre is involved in synthesis of an electron-dense, undifferentiated hook primordium, which undergoes progressive differentiation and elongation into the fully developed hook. A fully formed oncospheral hook consists of the three parts: blade, shank, and base. Each hook, at the site of its protrusion from the oncosphere, is surrounded by two electron-dense rings interconnected by a circular septate junction. The hook material consists of two or three layers that differ in electron density: (1) a moderately electron-dense core, (2) a middle layer of low electron density, and (3) a highly osmiophilic cortex. Wide bands of hook muscles are attached to the basal and collar parts of the hook. The hook blades project outside of the oncospheral body into a large cavity delimited by the hook region membrane attached at this pole directly to the oncospheral surface. In the fully developed oncosphere of M. ctenoides, the three pairs of oncospheral hooks and their muscles form a complex "hook muscle system", responsible for coordinated hook action. The differentiation and ultrastructure of oncospheral hooks in the oncospheres of M. ctenoides are compared to those described in other cestode species.

Ograniczanie wyników

Spatial colonization by feral domestic cats Felis catus of former wildcat Felis silvestris silvestris home ranges

Spermatological characters of Acanthobothrium crassicolle Wedl, 1855 (Tetraphyllidea, Onchobothriidae), a parasite of the common stingray Dasyatis pastinaca

Origin and ultrastructure of the outer coat surrounding mature eggs of Mosgovoyia ctenoides (Cestoda, Anoplocephalidae)

Ultrastructure of the mature spermatozoon in the genus Fasciola L., 1758: a comparative analysis of F. hepatica L., 1758 and F. gigantica Cobbold, 1856

Ultrastructural and cytochemical study on vitellogenesis in the diphyllidean cestode Echinobothrium euterpes (Echinobothriidae) and its phylogenetical implications

Natural infection of Oryctolagus cuniculus [Lagomorpha, Leporidae] by Gongylonema neoplasticum [Nematoda, Gongylonematidae] in Portugal

Ecological aspects influencing the helminth community of the wood mouse Apodemus sylvaticus in Dunas de Mira, Portugal

Cadmium and lead concentrations in Moniliformis moniliformis (Acanthocephala) and Rodentolepis microstoma (Cestoda), and in their definitive hosts, Rattus rattus and Mus domesticus in El Hierro (Canary Archipelago, Spain)

Total mercury and selenium concentrations in Sarpa salpa and Balistes capriscus and in their respective Digenean endoparasites Robphildollfusium fractum and Neoapocreadium chabaudi from Tunisia

The system Tetrabothrius bassani (Tetrabothriidae)- Morus bassanus (Sulidae) as a bioindicator of marine heavy metal pollution

Ultrastructure of spermatogenesis of the anoplocephalid cestode Gallegoides arfaai [Mobedi et Ghadirian, 1977] Tenora et Mas-Coma, 1978

Ultrastructure of the tegument of the anoplocephalid cestode Mosgovoyia ctenoides [Railliet, 1890] Beveridge, 1978

Influence of reservoirs created by small dams on the activity of bats

Characteristics of the helminthfauna of the wood mouse (Apodemus sylvaticus) from an urban waste dumping site in Catalonia (ne of Spain)

Post-embryonic development and ultrastructural characteristics of the polycephalic larva of Taenia parva Baer, 1926 [Cyclophyllidea, Taeniidae]

Vitellogenesis in Mosgovoyia ctenoides [Railliet, 1890] Beveridge, 1978 [Cyclophyllidea, Anoplocephalidae]

Ultrastructure of oncospheral hook formation in the cestode Mosgovoyia ctenoides [Railliet, 1890] Beveridge, 1978 [Cyclophyllidea, Anoplocephalidae]