Host specificity of adult versus larval cestodes of the elasmobranch tapeworm order Trypanorhyncha

Palm, Harry W.; Caira, Janine N.

doi:10.1016/j.ijpara.2007.08.011

Cited by 64 publications

(90 citation statements)

References 14 publications

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“…Such a relatively relaxed pattern of host specificity contrasts a widely demonstrated pattern of strict host specificity in rhinebothriideans and other elasmobranch cestodes in which cestode species typically occur in only a single host species. This is termed an oioxenous level of host specificity (sensu Euzet and Combes 1980) and has been demonstrated in many (Williams 1964, Caira and Jensen 2001, Jensen 2005, Tyler 2006, Ruhnke et al 2015 but not all (Palm andCaira 2008, Reyda andMarques 2011) elasmobranch cestode species.…”

Section: Discussionmentioning

confidence: 99%

A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations

Reyda¹,

Healy²,

Haslach³

et al. 2016

FOLIA PARASIT

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Section: Discussionmentioning

confidence: 99%

A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations

Reyda¹,

Healy²,

Haslach³

et al. 2016

FOLIA PARASIT

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“…Klimpel et al 2001. They mature in the stomach or spiral valve of elasmobranchs, and both taxa are known for low host specificity especially in the teleost intermediate hosts (Khalil et al 1994, Palm andCaira 2008). Crustacea (e.g.…”

Section: Discussionmentioning

confidence: 99%

Parasite fauna of the mediterranean grenadier Coryphaenoides mediterraneus (Giglioli, 1893) from the Mid-Atlantic Ridge (MAR)

Kellermanns

Klimpel

Palm

2009

Acta Parasitologica

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A total of 38 Coryphaenoides mediterraneus from the Charlie-Gibbs Fracture Zone (CGFZ), a part of the Mid-Atlantic Ridge (MAR), was studied for parasites and feeding ecology. Sixteen different parasite species were found, most of them belonging to the Digenea (6 species) and Nematoda (6). Twelve new host and 11 new locality records were established, and 8 deep-sea generalists and 5 deep-sea specialists were found. Twelve adult and 3 larval parasites occurred, with Allopodocotyle margolisi (Digenea), Tetraphyllidea indet. (Scolex pleuronectis, Cestoda) and Ascarophis longiovata (Nematoda) being the predominant species. These parasites reached a prevalence of 50.0%, 86.8% and 68.4% with an intensity of infection of 1-10, 1-91 and 1-74, respectively. The food consisted of crustaceans and cephalopods; no further prey items such as fish could be identified. Coryphaenoides mediterraneus demonstrates a parasite fauna similar to that of other deep-sea macrourids. No MAR-specific parasite species were found, and the collected helminths are common fish parasites of the North Atlantic deep-sea basin and the adjacent continental shelf regions. Only few larval epipelagic generalists such as ascaridoid nematodes were found, due to the deep origin of the studied fish between 1700-3500 m. The recorded species rich parasite fauna reflects the wide depth range and opportunistic feeding behaviour of C. mediterraneus on benthopelagic food. The recorded parasite species composition around the MAR appears to be similar to other deep-sea locations in the Atlantic Ocean, demonstrating the wide zoogeographical distribution of these deep-sea metazoans. Consequences of the MAR, the CGFZ and the homogeneous deep-sea environmental conditions for the parasite species distribution are discussed.

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“…Order Trypanorhyncha is one of the well-studied cestode species which has intermediate larval stages affecting economically important marine fish. During the course of the life cycle they pass through at least three host species as procercoid, plerocercoid (plerocercus or merocercoid in some species) and finally the adult stage in sharks (Palm and Caira 2008).…”

Section: Introductionmentioning

confidence: 99%

First record of plerocercoid larvae belong to the order Trypanorhyncha (Diesing 1863) isolated from swordfish (Xiphias gladius, Linnaeus 1758) captured off Sri Lanka

Silva

Fernando

Ranatunga

et al. 2017

Sri Lanka J. Aquat.

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Parasitism leads to severe economic losses to marine fish exports in Sri Lanka. Swordfish is a seasonal species with high demand both locally and internationally. Presence of a parasite in their flesh confuses the suppliers with zoonotic Anisarkis spp. This study is aimed to identify the plerecercoid parasitic larvae found in swordfish and establish a feasible method of diagnosis at fish processing factories. Parasites buried in frozen swordfish (Xiphias gladius) muscles were isolated and stored in cold sea water. Samples were washed with normal saline water and observed under bright field light microscope at 40x and 100x magnifications, and the parasites were identified based on their morphological features. For further confirmation, confocalmicroscope was used to record scolex parameters. Total length of the parasites was 1.7 cm-3.5 cm (2.27 cm). Presence of the elongated, acraspidote scolex (length 6.23 mm, width at pars bothridialis 2.4 mm) with four tentacular armature and curved, apically inverted, thick edged bothridia confirmed the parasitic larvae belonged to the Order Trypanorhyncha. Corona of falciform hooks in the basal armature and the heteromorphous hooks in a half spiral arrangement at metabasal armature are characteristics of the genus Molicola. This is the first record of the Trypanorhynch plerocercoid larvae (genus:Molicola) isolated in swordfishes from Sri Lanka. This study emphasizes that morphological examination of the parasite scolex using bright field microscopy will be helpful to distinguish the parasitic genera and feasible to use in the fish processing factories.

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Host specificity of adult versus larval cestodes of the elasmobranch tapeworm order Trypanorhyncha

Cited by 64 publications

References 14 publications

A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations

A new genus of rhinebothriidean cestodes from batoid elasmobranchs, with the description of five new species and two new combinations

Parasite fauna of the mediterranean grenadier Coryphaenoides mediterraneus (Giglioli, 1893) from the Mid-Atlantic Ridge (MAR)

First record of plerocercoid larvae belong to the order Trypanorhyncha (Diesing 1863) isolated from swordfish (Xiphias gladius, Linnaeus 1758) captured off Sri Lanka

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