Biologist, MSc in Ecology and researcher. Expertise also in teaching and environmental education. Opinionmaker for long years, namely BioTerra and Revista O Instalador.
Skills and Expertise
Research Items (6)
The present work is the first study of parasitofauna of the Portuguese Coast that includes some species of deep fishes (12 orders, 18 families and 24 species). Works of this type in Portugal had basically appeared associates only to a host, the black-scabbard fish , in two areas: Sesimbra and Madeira.
The present work is the first study of parasitofauna of the Portuguese Coast that includes some species of deep fishes (12 orders, 18 families and 24 species). Works of this type in Portugal had basically appeared associates only to a host, the black-scabbard fish , in two areas: Sesimbra and Madeira. For the first time a parasitological study was made in Paralepis atlântica, where we find Digenea 1 and Anisakis sp. Cestode Paragrillotia sp. that parasite Lycodes vahlii presented very different morphometric characteristics from that it is registered for the described species, being very possibly a new species. In this study 34 species of metazoan parasites had been found. The following parasites and in the respective hosts had been detected for the first time: Amphipoda in Sebastes fasciatus; Anisakis sp. in Alepocephalus bairdii; Ascaridida in Synaphobranchus kaupi; Capillaridae in L. pallidus; Contracaecum sp. in Diretmus argenteus; Cucullanus sp. in Notacanthus chemnitzii; Digenea 5 in Cottunculus thomsonii; Hysterothylacium sp. in L. pallidus and L. vahlii; Lecithophyllum botryophorum in L. vahlii; Litobrothidae in Anarhichas lupus; Lophoura edwardsi in S. kaupi; Paragrillotia sp. in L. vahlii; Rhabdochonna sp. in L. vahlii; Raphidascaris sp. in Macrourus berglax; Steringophorus sp. in L. vahlii; Spinitecus sp. 2 in Glyptocephalus cynoglossus; Spinitecus sp. 3 in C. thomsonii; Spirurida in M. berglax; Tetraphyllidae larva 1 in A bairdii. Although the following species of parasites and respective hosts had been already cited in previous studies and other geographic regions, with this work had been detected for the first time in Portugal: Anisakis sp. in R. hippoglossoides and M. berglax ; b) Contracaecum sp. in Reinhardtius hippoglossoides and S. fasciatus; c) Corynossoma sp. in R. hippoglossoides; d) Hysterothylacium sp. in M. berglax; e) Sphyrion lumpi in M. berglax; f) Spinitectus sp. 1, in M. berglax. In that it respects to the species of more frequent parasites in this inquiry we have: Digenean - Steringophorus sp. and Lecisthaster sp.; Nematoda- Anisakis sp.; Contracaecum sp. and Hysterothylacium sp. and Copepoda - Sphyrion lumpi. The orders of fish that in this study had shown greater diversity of parasites had been Perciformes; Gadiformes; Pleuronectiformes; Scorpaeniformes and Osmeriformes. vii The orders that in this study had not met parasites had been: Myctophiformes; Squaliformes and Stomiiformes. Relatively to A. carbo, this is the first study of the community of parasites of the black-scabbard fish of the Açores, that presented as dominant species Anisakis sp. In our study, the community of R. hippoglossoides parasites presented as dominant species Anisakis sp. and Contracaecum sp., with high intensities. Determined fish analyzed here they present species responsible parasites for zoonosis, are they : some anisakids, B. vasculosum, and Corynosoma, sp. which that they have commercial interest: A. carbo; M. berglax; R. hippoglossoides; S. fasciatus and S. mentella pointing for create measures of prevention in order to prevent the contamination of human being.
Aphanopus carbo, black scabbardfish, specimens from 3 Portuguese regions (the mainland, Madeira and the azores) during four (mainland and Madeira) or two (azores) seasons of the year were examined for the presence of Anisakis. all the fish examined (n=287) were infected with Anisakis L3 larvae (prevalence = 100%). significant geographical differences in intensity were found: the azores showed the lowest mean intensity value (53.7) and Madeira the highest one (253.9). the intensity of infection was positively correlated with the host length in specimens of sesimbra and Madeira. significant seasonal differences in intensity were found in the studied regions. the very high values in prevalence and intensity strongly suggest that the consumption of raw or undercooked black scabbard fish is a potential risk for human health.
We studied the use of parasites as biological tags for discriminating, fish stocks of Aphanopus carbo (Osteichthyes: Trichiuridae) front Portugal (Sesimbra oil the mainland, Madeira and the Azores). Sixteen different metazoan parasites were found (14 from Madeira, 9 from Sesimbra and 7 from the Azores). Some parasites occurred only in fish from Madeira. The prevalence and mean intensity of the infection was recorded for each parasite and locality, and their values were statistically compared between the three sampling localities and related to host length classes. The differences between some of these parameters were statistically significant among the three localities or between two of them. It is suggested that 6 parasites (Tentacularia coryphaenae, Sphyriocephalus tergestintis, Campbelliella heteropoeciloacantha, Anisakis spp., Bolbosonia vasculosum and unidentified Acanthocephala larvae) can be used as biological tags to discriminate Portuguese stocks of Aphanopus carbo.