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Progress report summarizing the reef fish sampling, PCB - Earthjustice

Progress report summarizing the reef fish sampling, PCB - Earthjustice

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I (D) (1) (b) Selection of Sample Size<br />

For each <strong>sampling</strong> round, a minimum of 30 legal size <strong>reef</strong> <strong>fish</strong> typically targeted by<br />

recreational <strong>fish</strong>ermen were collected from <strong>the</strong> Oriskany Reef. The preferred<br />

<strong>sampling</strong> alternative as specified in <strong>the</strong> Monitoring Work Plan was to collect fifteen<br />

specimens of each of two different <strong>reef</strong> <strong>fish</strong> species, ideally representing two<br />

different trophic levels or feeding guilds, during each <strong>sampling</strong> round. Changes, if<br />

any, in <strong>the</strong> mean total <strong>PCB</strong> levels averaged from <strong>the</strong> sum of <strong>the</strong> individual total<br />

<strong>PCB</strong> values of each of <strong>the</strong> 15 specimens of <strong>the</strong> two different species would be<br />

evaluated over <strong>the</strong> initial five year <strong>sampling</strong> period. If mean total <strong>PCB</strong> values<br />

derived from individual values of 15 or more specimens of a particular species<br />

showed a trend over time of exceeding <strong>the</strong> screening value of 0.020 ppm total <strong>PCB</strong>s<br />

wet weight, monitoring efforts were to be expanded.<br />

After <strong>the</strong> initial two <strong>sampling</strong> rounds, in December of 2006 and April of 2007, it was<br />

realized that <strong>the</strong> current <strong>sampling</strong> regimes would be unable to achieve <strong>the</strong><br />

Monitoring Work Plan preferred alternative of securing a minimum of 15 legal size<br />

specimens of each of two different <strong>reef</strong> <strong>fish</strong> species during each <strong>sampling</strong> round. The<br />

two primary target species were initially proposed to be red snapper and gray<br />

trigger<strong>fish</strong>. At <strong>the</strong> Oriskany Reef, gray trigger<strong>fish</strong> were nei<strong>the</strong>r caught nor visually<br />

observed by SCUBA divers during <strong>the</strong> first three years of monitoring. The backup<br />

alternative was implemented to retain any additional legal size targeted <strong>reef</strong> <strong>fish</strong><br />

species until a minimum number of 30 <strong>reef</strong> <strong>fish</strong> were caught during a particular<br />

<strong>sampling</strong> round in order to get a minimum sample size of 15 legal red snapper per<br />

<strong>sampling</strong> round.<br />

The minimum number of 30 legal size <strong>reef</strong> <strong>fish</strong> sought and analyzed per <strong>sampling</strong><br />

round was a statistically valid sample round number based on <strong>the</strong> ability of <strong>the</strong><br />

FWC and ECMRD to fund a Tier 1 <strong>PCB</strong> screening level <strong>sampling</strong> number that could<br />

be collected, twice a year, during two different seasons (typically fall and spring)<br />

over a period of at least five years. This target number of <strong>fish</strong> retained was<br />

increased for analysis to 35 in Sampling Round #7 and to 39 in Sampling Round #8<br />

in an effort to procure additional piscivores (e.g. grouper) and invertivores (e.g.<br />

trigger<strong>fish</strong> and porgies) for <strong>PCB</strong> analysis. When <strong>the</strong> target number of specimens<br />

had been collected in <strong>the</strong> order of <strong>the</strong>ir capture availability, <strong>the</strong>n <strong>the</strong> <strong>fish</strong>ing<br />

operations were terminated and <strong>the</strong> <strong>fish</strong>ing vessel returned to port unless <strong>the</strong>re was<br />

some o<strong>the</strong>r specific additional objective such as a pilot tagging project or a nearby<br />

artificial <strong>reef</strong> to be sampled.<br />

24 | P age

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