AI Article Synopsis
- A study in South Carolina's estuarine system revealed that the striped mullet, Mugil cephalus, is commonly infected by a gill parasite, Metamicrocotyla macracantha, among other organisms.
- Over the course of a year, researchers collected 770 mullets of various ages and found an overall infection rate of 11.2%, with a higher prevalence in brackish waters but no significant correlation with factors like host age or sex.
- This study marks the first recorded instance of M. macracantha in South Carolina and suggests that the region may be at the northern edge of the parasite's geographical range due to temperature conditions.
Article Abstract
In the estuarine system of South Carolina (USA), the striped mullet, Mugil cephalus, was found to be parasitized by the polyopisthocotylid monogenean Metamicrocotyla macracantha among other gill parasites. Mullet of various ages were collected monthly for 1 year from oligohaline, mesohaline, polyhaline, and euryhaline localities. The population dynamics of M. macracantha was analyzed according to time of year, different salinity levels, and host age and sex. Out of the 770 mullet studied, 11.2% were infected (mean, two worms per host). Neither prevalence nor mean intensity was correlated with biotic factors. However, significant seasonal variation in prevalence was observed, and the worm was found more frequently in higher salinities. Mean intensity, however, did not change significantly with time of year or salinity. This is the first published report of M. macracantha in the South Carolina estuarine system and represents the northernmost record for this parasite. Furthermore, the lack of common egg-bearing individuals and juveniles indicated that this area is likely the northern limit of the geographical range of M. macracantha, whose life cycle seems restricted to more constant water temperatures than those found at the South Carolina latitudes.
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| http://dx.doi.org/10.1007/s00436-008-0920-9 | DOI Listing |
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