Digenea and acanthocephala of elasmobranch fishes from the southern coast of Brazil

Knoff, Marcelo; Clemente, Sérgio Carmona de São; Pinto, Roberto Magalhães; Gomes, Delir Corrêa

doi:10.1590/s0074-02762001000800012

Cited by 27 publications

(25 citation statements)

References 24 publications

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“…The Antarctic Chondrichthyes are not infected with Acanthocephala. According to Petrotschenko (1971a, b) and Knoff et al (2001b) acanthocephalan species have been found in Chondrichthyes outside Antarctica. Adult acanthocephalan species usually occur in mammals, birds or teleosts so that Chondrichthyes are probably accidental hosts.…”

Section: Echinorhynchus Muraenolepisi Has Been Found Exclusively In Mmentioning

confidence: 99%

Helminths of Antarctic fishes: Life cycle biology, specificity and geographical distribution

Rocka

2006

Acta Parasitologica

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Bony fishes (Teleostei) play an important role in the completion of life cycles of helminth parasites in the Antarctica. These fishes may be definitive, second intermediate or paratenic hosts of the helminths. The most species-rich taxon is Digenea. Virtually all of these digeneans use teleosts as definitive hosts. Only one species, Otodistomum cestoides, occurs as the adult stage in skates (Chondrichthyes), with teleosts as its second intermediate host. Among 14 cestode species maturing in fishes only one, Parabothriocephalus johnstoni, occurs in a bony fish, Macrourus whitsoni, whereas the others are parasites of Chondrichthyes (cartilaginous fishes). Antarctic Chondrichthyes are not infected with nematode and acanthocephalan species. Specificity to the intermediate and/or paratenic hosts of the majority of Antarctic helminths is wide, whereas that for definitive hosts is often narrower, restricted to one order or sometimes even to one or two host species. Almost all of 73 helminth species maturing in Antarctic fishes are endemics. Only 4 digenean and one nematode species are cosmopolitan or bipolar.

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Section: Echinorhynchus Muraenolepisi Has Been Found Exclusively In Mmentioning

confidence: 99%

Helminths of Antarctic fishes: Life cycle biology, specificity and geographical distribution

Rocka

2006

Acta Parasitologica

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“…Representative specimens were deposited in the Coleção Helmintológica do Instituto Oswaldo Cruz, (CHIOC), Rio de Janeiro, Brazil; samples for comparison were also obtained from the Museum of New Zealand (Te Papa Tongarewa) Parasite Collection, Wellington, New Zealand (MNZ); United States National Parasite Collection, Beltsville, USA (USNPC). At least one host specimen of the investigated fish species was deposited as symbiotype sensu Brooks (1993), in the collection of the Instituto de Pesca, Santos, SP, Brazil (IP) and listed by Knoff et al (2001b). Distinctive basal armature with corona of long falciform hooks with rounded extremities.…”

Section: Methodsmentioning

confidence: 99%

“…Recently data on some of the parasites have been reported for nematodes (Knoff et al 2001a), digeneans and acanthocephalans (Knoff et al 2001b), and trypanorhynch cestodes (Knoff et al 2002, 2004a, b, c, Gomes et al 2005, Pinto et al 2006). The present study is related to Gymnorhynchus isuri Robinson, 1959 (Eucestoda, Trypanorhyncha) recovered from the spiral valve of Isurus oxyrinchus Rafinesque (Lamnidae), collected off the coast of Santa Catarina.…”

mentioning

confidence: 99%

Redescription of Gymnorhynchus isuri (Cestoda: Trypanorhyncha) from Isurus oxyrinchus (Elasmobranchii: Lamnidae)

Knoff¹,

Clemente²,

Pinto³

et al. 2007

FOLIA PARASIT

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Abstract. Specimens of the elasmobranch, Isurus oxyrinchus Rafinesque, captured in 1999 in the state of Santa Catarina, Brazil, were parasitized with the poecilacanthoid trypanorhynch cestode Gymnorhynchus isuri Robinson, 1959, that is redescribed here. New details of scolex and proglottid morphology are given. These details are mainly related to tentacle armature, terminal genitalia and observations of external morphology of proglottids.

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“…E. Gotschlich (1913), (5) Norman (1937), (6) De Buen (1959, (7) Carvajal (1971), (8) Menni (1973), (9) Sadowsky (1973), (10) Ojeda (1983), (11) Raschi (1984), (12) , (13) Leible (1987), (14) Leible et al (1990), (15) Lloris & Rucabado (1991), (16) Lucifora et al (2000), (17) Gomes & Picado (2001), (18) Krefft & Stehmann (1975), (2) Menni & Gosztonyi (1977), (3) FRV "Walther Herwing" (1978), (4) FRV "Holmberg" (1983), (5) , (6) Leible & Stehmann (1987), (7) Lloris & Rucabado (1991), (8) -xx- , (9) Gomes & Picado (2001), (10) Knoff et al (2001b), (11) Cedrola et al (2005), (12) Céspedes et al (2005), (13) Díaz de Astarloa et al (2008), (14) Lamilla et al (2010), (15) Perier et al (2011), (16) Arkhipkin et al (2012), (17) Lamilla et al (2012a), (18) Lamilla et al (2012b), (19) Bustamante et al (2014b). Filled circle indicates the holotype locality.…”

Section: Figure 6 Morphotypes Of Dipturus Trachyderma a Original Dmentioning

confidence: 99%

“…Menni & Gosztonyi, 1977;Menni & Gosztonyi, 1982;Sielfeld & Vargas, 1992;Sielfeld & Vargas, 1999;Gili et al, 1999;Buschmann et al, 2005;Thiel et al, 2009. López et al, 1989;Compagno, 1999b;Knoff et al, 2001b;Knoff et al, 2002;López et al, 2002;Oyarzún et al, 2003;Knoff et al, 2004;Cedrola et al, 2005;Compagno, 2005a;Kyne & Simpfendorfer, 2007;Lamilla & Massa, 2007;Menni & Lucifora, 2007;Reyes & Torres-Flores, 2008;Muniz-Pereira et al, 2009;Quiroga et al, 2009;Kyne & Simpfendorfer, 2010;Menni et al, 2010. Stehmann, 1978;Mould, 1997;McEachran & Dunn, 1998;Menni & Stehmann, 2000;Gomes & Picado, 2001;Soto & Mincarone, 2001;Knoff et al, 2001a;Nion et al, 2002;Lamilla & Sáez, 2003;Smith et al, 2004;Céspedes et al, 2005;Compagno, 2005b;Lamilla, 2005;Lamilla & Bustamante, 2005;Lamilla et al, 2006;Licandeo et al, 2006;…”

Section: Order Rajiformes Berg 1940unclassified

Skate-ing on thin ice: molecular ecology of longnose skates in the Southeast Pacific Ocean

Vargas-Caro¹

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Longnose skates may be one of the most vulnerable taxa of elasmobranch fishes, with documented local extinctions and population declines worldwide. Longnose skates are the main component of the commercial elasmobranch fisheries in the south-east Pacific Ocean, especially in Chilean waters where target and bycatch fisheries have led two species to the brink of collapse. The yellownose skate Zearaja chilensis and the roughskin skate Dipturus trachyderma are endemic of southern South America yet little is known about population ecology and stock structure.Additionally, the external morphology of longnose skates is remarkably similar, especially in early life stages, and a lack of accurate species identification has compromised official landings records which in turn has impacted fishery management. Overall abundance of longnose skates has declined substantially over the last decade due to intensive fishing pressure and the fishery is considered to be `fully exploited'.Based on all available information in peer-reviewed and grey literature, a comparative synthesis of the biology and ecology was conducted on Z. chilensis and D. trachyderma. A positive increase in relation to scientific knowledge over the past decade was noticeable, although several basic aspects of their biology and ecology are still missing. There is an urgent need to fill knowledge gaps on, for example, movement patterns, feeding ecology and habitat use, population size and structure, and levels of connectivity. In this study, taxonomic clarity was provided, and relevant information with regard to the biology, ecology and fisheries that interact with longnose skates was collated.Confusion of identity between longnose skates occurs to the present day. In order to address this issue, morphometric and genetic tools are provided to aid in species identification of early-life stage specimens. Thirty-seven morphometric measurements and three meristic characters were used to identify specimens. These results suggest that the number of midline, nuchal and inter-dorsal thorns could be used to discriminate between specimens of Z. chilensis and D. trachyderma. Previously, the presence of a single nuchal thorn was considered to be a feature that could be used to separate species, however, this morphological feature has proven to be variable in Z. chilensis. Additionally, partial sequences of the 16S, cox1, nadh2 and the control regions of the mitochondrial DNA were amplified and analysed for intraspecific and interspecific divergence. Amplified fragments of cox1 gene and the control region contained information to separate the target species; however, specimens of D. trachyderma and Z. chilensis were grouped indistinctly within a single clade using 16S and nadh2 fragments.-iiiThe evolutionary history of Zearaja was also explored, in a broad taxonomic context by using whole mitochondrial genomes (mitogenomes) to understand higher-level phylogenetic relationships among batoids. A data set of 56 mitogenomes of 47 batoids and four outgroups was analysed. O...

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Digenea and acanthocephala of elasmobranch fishes from the southern coast of Brazil

Cited by 27 publications

References 24 publications

Helminths of Antarctic fishes: Life cycle biology, specificity and geographical distribution

Helminths of Antarctic fishes: Life cycle biology, specificity and geographical distribution

Redescription of Gymnorhynchus isuri (Cestoda: Trypanorhyncha) from Isurus oxyrinchus (Elasmobranchii: Lamnidae)

Skate-ing on thin ice: molecular ecology of longnose skates in the Southeast Pacific Ocean

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