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Gross and microscopic pathology of hard and soft corals in New Caledonia

Journal of Invertebrate Pathology

By:
, , ,
DOI: 10.1016/j.jip.2014.05.007

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Abstract

We surveyed the reefs of Grande Terre, New Caledonia, for coral diseases in 2010 and 2013. Lesions encountered in hard and soft corals were systematically described at the gross and microscopic level. We sampled paired and normal tissues from 101 and 65 colonies in 2010 and 2013, respectively, comprising 51 species of corals from 27 genera. Tissue loss was the most common gross lesion sampled (40%) followed by discoloration (28%), growth anomalies (13%), bleaching (10%), and flatworm infestation (1%). When grouped by gross lesions, the diversity of microscopic lesions as measured by Shannon–Wiener index was highest for tissue loss, followed by discoloration, bleaching, and growth anomaly. Our findings document an extension of the range of certain diseases such as Porites trematodiasis and endolithic hypermycosis (dark spots) to the Western Pacific as well as the presence of a putative cnidarian endosymbiont. We also expand the range of species infected by cell-associated microbial aggregates, and confirm the trend that these aggregates predominate in dominant genera of corals in the Indo-Pacific. This study highlights the importance of including histopathology as an integral component of baseline coral disease surveys, because a given gross lesion might be associated with multiple potential causative agents.

Geospatial Extents

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Gross and microscopic pathology of hard and soft corals in New Caledonia
Series title:
Journal of Invertebrate Pathology
DOI:
10.1016/j.jip.2014.05.007
Volume
120
Year Published:
2014
Language:
English
Publisher:
Elsevier
Contributing office(s):
National Wildlife Health Center
Description:
9 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Invertebrate Pathology
First page:
50
Last page:
58
Number of Pages:
9
Country:
New Caledonia
Other Geospatial:
Grande Terre;Pacific Ocean