<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>From January to May 2015, a sample of 50 individuals of the Pacific sierra <italic>Scomberomorus sierra</italic> Jordan and Starks, 1895 captured off Mazatlán (southeastern Gulf of California, Mexico) were reviewed for helminths. A total of 6, 255 parasitic worms belonging to 11 species (9 in adult stage and 2 larvae) were obtained. Trematoda was the best represented group with 6 species of Didymozoidae Monticelli, 1888 and 1 of Bucephalidae Poche, 1907. In addition, 2 monogenean species and 2 of Nematoda were collected. In this study, the first molecular sequences for didymozoid species in Mexico were generated, and for <italic>Glomeritrema</italic> sp. at worldwide level. The most prevalent species were <italic>Didymocylindrus</italic> sp. (92 %) and <italic>Didymocystis scomberomori</italic> (MacCallum &amp; MacCallum, 1916) (88 %), whereas the monogenean <italic>Thoracocotyle crocea</italic> MacCallum, 1913 reached the highest value of mean intensity (75.2). The coincidence between the helminthological composition established in our study and that reported for the same scombrid in 4 localities from the Mexican South Pacific (sharing 10 species) suggests that this group of species persistently parasitize <italic>S. sierra</italic> throughout its distribution along the Mexican Pacific coast; furthermore, due to the richness of didymozoids and the affinity of Thoracocotylidae species for <italic>S. sierra</italic>, both groups can be considered typical parasites of this fi sh.</p></abstract>

From January to May 2015, a sample of 50 individuals of the Pacific sierra Scomberomorus sierra Jordan and Starks, 1895 captured off Mazatlán (southeastern Gulf of California, Mexico) were reviewed for helminths. A total of 6, 255 parasitic worms belonging to 11 species (9 in adult stage and 2 larvae) were obtained. Trematoda was the best represented group with 6 species of Didymozoidae Monticelli, 1888 and 1 of Bucephalidae Poche, 1907. In addition, 2 monogenean species and 2 of Nematoda were collected. In this study, the first molecular sequences for didymozoid species in Mexico were generated, and for Glomeritrema sp. at worldwide level. The most prevalent species were Didymocylindrus sp. (92 %) and Didymocystis scomberomori (MacCallum & MacCallum, 1916) (88 %), whereas the monogenean Thoracocotyle crocea MacCallum, 1913 reached the highest value of mean intensity (75.2). The coincidence between the helminthological composition established in our study and that reported for the same scombrid in 4 localities from the Mexican South Pacific (sharing 10 species) suggests that this group of species persistently parasitize S. sierra throughout its distribution along the Mexican Pacific coast; furthermore, due to the richness of didymozoids and the affinity of Thoracocotylidae species for S. sierra, both groups can be considered typical parasites of this fi sh.

Helminth fauna of <italic>Scomberomorus sierra</italic> (Actinopterygii: Scombridae) in southeastern Gulf of California, Mexico

Helminthologia

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Helminth fauna of  (Actinopterygii: Scombridae) in southeastern Gulf of California, Mexico

From January to May 2015, a sample of 50 individuals of the Pacific sierra Scomberomorus sierra Jordan and Starks, 1895 captured off Mazatlán (southeastern...

Helminth species	Infection site	Prevalence (%)	Mean Intensity	CNHE catalog number	GenBank accession number
Platyhelminthes
Trematoda
Didymozoidae					--
Didymocystis scomberomori	Mesentery, intestine	88	38.3	11144	MZ663671
Didymocystis sp.	Kidney	92	19.9	11148	MZ663672
Didymocylindrus sp.	Gills	58	19.1	11139	---
Didymozoon sp.	Gills	48	8.3	11142	MZ663669
Glomeritrema sp.	Gills	22	6.7	11138	MZ663670
Anacetabulum gen. sp.^Larvae	Gills	18	9.8	11141	---
Bucephalidae
Prosorhynchoides cf. cybii	Intestine	6	1	11146	---
Monogenea
Thoracocotylidae
Thoracocotyle crocea	Gills	56	75.2	11145	---
Mexicotyle mexicana	Gills	40	24.3	11140	---
Nematoda				11149
Anisakiidae
Hysterothylacium sp.^Larvae	Intestine	4	1	---	---
Philometra sp.	Gonads	54	4.9	11159	---

Helminth fauna of Scomberomorus sierra (Actinopterygii: Scombridae) in southeastern Gulf of California, Mexico

Article Category: Research note

Published Online: Dec 25, 2021

Page range: 403 - 407

Received: Jun 07, 2021

Accepted: Aug 09, 2021

DOI: https://doi.org/10.2478/helm-2021-0035

Keywords
Fish, parasites, Pacific sierra, Gulf of California, Taxonomic composition

© 2021 N. Y. Bárcenas de los Santos, F. N. Morales-Serna, R. M. Medina-Guerrero, V. Hernández-Covarrubias, A. Oceguera-Figueroa, L. García-Prieto, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Helminthological record of Scomberomorus sierra in southeastern Gulf of California, Mexico.

Helminth fauna of Scomberomorus sierra (Actinopterygii: Scombridae) in southeastern Gulf of California, Mexico

Article Category: Research note

Published Online: Dec 25, 2021

Page range: 403 - 407

Received: Jun 07, 2021

Accepted: Aug 09, 2021

DOI: https://doi.org/10.2478/helm-2021-0035

KeywordsFish, parasites, Pacific sierra, Gulf of California, Taxonomic composition

© 2021 N. Y. Bárcenas de los Santos, F. N. Morales-Serna, R. M. Medina-Guerrero, V. Hernández-Covarrubias, A. Oceguera-Figueroa, L. García-Prieto, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Helminthological record of Scomberomorus sierra in southeastern Gulf of California, Mexico.

Keywords
Fish, parasites, Pacific sierra, Gulf of California, Taxonomic composition