Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea
Screening of mud crab genus Scylla was conducted in four locations (Marudu Bay, Lundu, Taiping, Setiu) representing Malaysia. Scylla olivacea with abnormal primary and secondary sexual characters were prevalent (approximately 42.27% of the local screened S. olivacea population) in Marudu Bay, Sabah....
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| Format: | Article |
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PeerJ Inc.
2017-06-01
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| Online Access: | https://peerj.com/articles/3419.pdf |
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| author | Khor Waiho Hanafiah Fazhan Henrik Glenner Mhd Ikhwanuddin |
| author_facet | Khor Waiho Hanafiah Fazhan Henrik Glenner Mhd Ikhwanuddin |
| author_sort | Khor Waiho |
| collection | DOAJ |
| description | Screening of mud crab genus Scylla was conducted in four locations (Marudu Bay, Lundu, Taiping, Setiu) representing Malaysia. Scylla olivacea with abnormal primary and secondary sexual characters were prevalent (approximately 42.27% of the local screened S. olivacea population) in Marudu Bay, Sabah. A total of six different types of abnormalities were described. Crabs with type 1 and type 3 were immature males, type 2 and type 4 were mature males, type 5 were immature females and type 6 were mature females. The abdomen of all crabs with abnormalities were dented on both sides along the abdomen’s middle line. Abnormal crabs showed significant variation in their size, weight, abdomen width and/or gonopod or pleopod length compared to normal individuals. The mean body weight of abnormal crabs (type 1–5) were higher than normal crabs with smaller body size, while females with type 6 abnormality were always heavier than the normal counterparts at any given size. Sacculinid’s externa were observed in the abdomen of crabs with type 4 and type 6 abnormalities. The presence of embryos within the externa and subsequent molecular analysis of partial mitochondrial COI region confirmed the rhizocephalan parasite as Sacculina beauforti. Future in-depth descriptions of the life cycle and characteristics of S. beauforti are recommended as it involves a commercially important edible crab species and the effect on human health from the consumption of crabs is of crucial concern. |
| first_indexed | 2024-03-09T07:02:05Z |
| format | Article |
| id | doaj.art-46f75e1d91e44aaab61b63a4430104f9 |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T07:02:05Z |
| publishDate | 2017-06-01 |
| publisher | PeerJ Inc. |
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| series | PeerJ |
| spelling | doaj.art-46f75e1d91e44aaab61b63a4430104f92023-12-03T09:48:59ZengPeerJ Inc.PeerJ2167-83592017-06-015e341910.7717/peerj.3419Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivaceaKhor Waiho0Hanafiah Fazhan1Henrik Glenner2Mhd Ikhwanuddin3Institute of Tropical Aquaculture, Universiti Malaysia Terengganu, Kuala Terengganu, Terengganu, MalaysiaInstitute of Tropical Aquaculture, Universiti Malaysia Terengganu, Kuala Terengganu, Terengganu, MalaysiaMarine Biodiversity Group, Department of Biology, University of Bergen, Bergen, NorwayInstitute of Tropical Aquaculture, Universiti Malaysia Terengganu, Kuala Terengganu, Terengganu, MalaysiaScreening of mud crab genus Scylla was conducted in four locations (Marudu Bay, Lundu, Taiping, Setiu) representing Malaysia. Scylla olivacea with abnormal primary and secondary sexual characters were prevalent (approximately 42.27% of the local screened S. olivacea population) in Marudu Bay, Sabah. A total of six different types of abnormalities were described. Crabs with type 1 and type 3 were immature males, type 2 and type 4 were mature males, type 5 were immature females and type 6 were mature females. The abdomen of all crabs with abnormalities were dented on both sides along the abdomen’s middle line. Abnormal crabs showed significant variation in their size, weight, abdomen width and/or gonopod or pleopod length compared to normal individuals. The mean body weight of abnormal crabs (type 1–5) were higher than normal crabs with smaller body size, while females with type 6 abnormality were always heavier than the normal counterparts at any given size. Sacculinid’s externa were observed in the abdomen of crabs with type 4 and type 6 abnormalities. The presence of embryos within the externa and subsequent molecular analysis of partial mitochondrial COI region confirmed the rhizocephalan parasite as Sacculina beauforti. Future in-depth descriptions of the life cycle and characteristics of S. beauforti are recommended as it involves a commercially important edible crab species and the effect on human health from the consumption of crabs is of crucial concern.https://peerj.com/articles/3419.pdfMud crabSacculina beaufortiRhizocephalanScylla olivaceaParasitesSacculinids |
| spellingShingle | Khor Waiho Hanafiah Fazhan Henrik Glenner Mhd Ikhwanuddin Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea PeerJ Mud crab Sacculina beauforti Rhizocephalan Scylla olivacea Parasites Sacculinids |
| title | Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea |
| title_full | Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea |
| title_fullStr | Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea |
| title_full_unstemmed | Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea |
| title_short | Infestation of parasitic rhizocephalan barnacles Sacculina beauforti (Cirripedia, Rhizocephala) in edible mud crab, Scylla olivacea |
| title_sort | infestation of parasitic rhizocephalan barnacles sacculina beauforti cirripedia rhizocephala in edible mud crab scylla olivacea |
| topic | Mud crab Sacculina beauforti Rhizocephalan Scylla olivacea Parasites Sacculinids |
| url | https://peerj.com/articles/3419.pdf |
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