. Bulletin. Science. RELATIONSHIP OF COPEPOD EYE PARASITE TO PACIFIC SANDDAB 91 SD14 X SD13 X SD12 SD11 X * SD10 SD9 LA 5 ^ ' x SD8 X SD7. Fig. 3. Epibenthic trawl stations off Point Loma, San Diego, California. Dashed line represents the pipeline extension. Modified from a map by John Byrne (City of San Diego 1995). Results Host-Parasite Relationship Specimens of P. cincinnatus infected Pacific sanddabs ranging in size from to cm standard length (SL). There was a positive correlation between the size of the host and the size of the parasite (Fig. 4A). Even small parasites in- fecting
. Bulletin. Science. RELATIONSHIP OF COPEPOD EYE PARASITE TO PACIFIC SANDDAB 91 SD14 X SD13 X SD12 SD11 X * SD10 SD9 LA 5 ^ ' x SD8 X SD7. Fig. 3. Epibenthic trawl stations off Point Loma, San Diego, California. Dashed line represents the pipeline extension. Modified from a map by John Byrne (City of San Diego 1995). Results Host-Parasite Relationship Specimens of P. cincinnatus infected Pacific sanddabs ranging in size from to cm standard length (SL). There was a positive correlation between the size of the host and the size of the parasite (Fig. 4A). Even small parasites in- fecting the eyes of newly settled sanddabs were able to attain sexual maturity. Most of the infected fish harbored a single parasite. The left eye was infected slightly more frequently () than the right eye (). Multiple infections were uncommon; only four individuals of 232 infected fish had more than one adult parasite. One specimen, measuring cm, harbored five parasites in its right eye (Fig. 4B). Infection of both eyes was extremely rare; only two specimens had a parasite in each eye (Fig. 4C). Because monocular infections with P. cincinnatus were most common, we in- vestigated the ability of a Pacific sanddab harboring a single parasite to survive the infection. Four sanddabs (three uninfected and one with a monocular infection) were caught by hook and line, and maintained in an aquarium at Scripps Insti- tution of Oceanography for several months. The parasite was ovigerous at the time of capture, and exhibited no morphological changes for about six weeks. After the parasite shed all of its eggs, the body turned dark brown and disinte- grated. Following the death of the parasite, the cornea of the infected eye became opaque (Fig. 4D); however, the fish was able to feed and survived for approxi- mately three months after the parasite Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo
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