Progress report summarizing the reef fish sampling, PCB - Earthjustice
Progress report summarizing the reef fish sampling, PCB - Earthjustice
Progress report summarizing the reef fish sampling, PCB - Earthjustice
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
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