Acuariidae (Nematoda) in Procellariiformes (Aves) on the southern coast of Rio Grande do Sul, Brazil

Schramm, Camila Costa; Mascarenhas, Carolina Silveira; Gastal, Silvia Bainy; Scheer, Simone; Müller, Gertrud; Robaldo, Ricardo Berteaux

doi:10.1590/s1984-29612017073

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…This constitutes a large knowledge gap for seabird conservation as evidence from around the world suggests nematodes are often associated with, or contribute to, decreased host health and survival (e.g. Abollo et al ., 2001 b ; Schramm et al ., 2018 ; Vanstreels et al ., 2018 ). Many seabirds dissected in this study are native, endemic, threatened or hold cultural significance in New Zealand, such as the yellow-eyed penguin and northern royal albatross.…”

Section: Discussionmentioning

confidence: 99%

Large-scale genetic investigation of nematode diversity and their phylogenetic patterns in New Zealand's marine animals

2022

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Nematodes constitute one of the most speciose metazoan groups on earth, and a significant proportion of them have parasitic life styles. Zooparasitic nematodes have zoonotic, commercial and ecological significance within natural systems. Due to their generally small size and hidden nature within their hosts, and the fact that species discrimination using traditional morphological characteristics is often challenging, their biodiversity is not well known, especially within marine ecosystems. For instance, the majority of New Zealand's marine animals have never been the subject of nematode studies, and many currently known nematodes in New Zealand await confirmation of their species identity with modern taxonomic techniques. In this study, we present the results of an extensive biodiversity survey and phylogenetic analyses of parasitic nematodes infecting New Zealand's marine animals. We used genetic data to differentiate nematodes to the lowest taxonomic level possible and present phylogenies of the dominant clades to illustrate their genetic diversity in New Zealand. Our findings reveal a high diversity of parasitic nematodes (23 taxa) infecting New Zealand's marine animals (62 of 94 free-living animal species investigated). The novel data collected here provide a solid baseline for future assessments of change in diversity and distribution of parasitic nematodes.

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Section: Discussionmentioning

confidence: 99%

Large-scale genetic investigation of nematode diversity and their phylogenetic patterns in New Zealand's marine animals

2022

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“…The family Acuariidae has three subfamilies: Seuratiinae, Schistorophinae, and Acuariinae (16). The members of the family Acuariidae was classified based on the structure of the cordons by Chabaud (7), and have unusual cuticular structures on their head ends called cordons, ptilina, or serrated shields (6).…”

Section: Discussionmentioning

confidence: 99%

Morphological and Molecular Characterization of Desportesius invaginatus (Nematoda: Acuariidae) from Egretta garzetta and Bubulcus ibis in Korea

et al. 2021

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An aquariid nematode, Desportesius invaginatus, was found in the proventriculus of an Egretta garzetta and a Bubulcus ibis from Chuncheon in the Republic of Korea. The worms were identified by light and scanning electron microscopy based on important taxonomic characteristics (body length, esophagus length, cordons, spicules, caudal alae of males, position of the vulva) and then phylogenetically analyzed using the 18S rRNA encoding gene. The nematodes were characterized by a body length of 7.0-8.0 mm in males and 10.2-13.1 mm in females, and two pairs of cordons recurrent in the anterior direction, and cordons were anastomosed by a longitudinal cuticular ridge that externally delimits a longitudinal canal. The widest cuticular plates of cordons bears over 20 posterior spines. The length of the spicules in males was also significantly different. The right spicule measured 742-821 (794) m in length and 40-45 (42) m in width, and the left spicule measured 493-556 (541) m in length and 11-13 ( 12) m in width. The caudal alae of males are inflated and vesicular in appearance. The vulva was situated at 56-71 (58.3) m from the posterior extremity. Although the 18S rRNA sequences of worms were similar to the Synhimantus species, some genetic divergences were observed in comparison. In this study, the worms were recognized with genus Desportesius because genus Desportesius was considered a subgenus of Synhimantus. This is the first record of D. invaginatus in the Republic of Korea.

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Seabirds: studies with parasitofauna and potential indicator for environmental anthropogenic impacts

Matos

Domit

Bracarense

2020

SCA

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The aim of this review was to present the main anthropogenic threats to seabirds, a taxonomic group described as environmental sentinels, and the dynamics between parasites and hosts and their relationship with the health of the marine ecosystem. Coastal marine environments support various anthropogenic activities, exposing seabirds to multiple and synergistic environmental changes. These activities are considered negative to the maintenance of several seabird species, such as exposure to constant aquatic contaminants and fishing. In addition, parasitic and infectious diseases (viral, bacterial, and fungal) may also play an important role in maintaining some seabird populations. Some pathogenic organisms have public health importance and/or may indicate environmental quality. Host-parasite interaction may be positive, negative, or absent depending on some environmental factors potentially associated with degradation, as well as intrinsic factors of host or parasite. In addition, investigating aspects of seabird mortality also contributes to the constant population monitoring and understanding of the interaction between animals, humans, and the environment. Thus, seabirds and their parasitofauna can provide important ecological and health information, including those related to environmental health, supporting strategies for reducing degradation and maintaining marine ecosystems.

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Acuariidae (Nematoda) in Procellariiformes (Aves) on the southern coast of Rio Grande do Sul, Brazil

Cited by 3 publications

References 8 publications

Large-scale genetic investigation of nematode diversity and their phylogenetic patterns in New Zealand's marine animals

Large-scale genetic investigation of nematode diversity and their phylogenetic patterns in New Zealand's marine animals

Morphological and Molecular Characterization of Desportesius invaginatus (Nematoda: Acuariidae) from Egretta garzetta and Bubulcus ibis in Korea

Seabirds: studies with parasitofauna and potential indicator for environmental anthropogenic impacts

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