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06/16/2020
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06/16/2020
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8/19/2020 2:03:55 PM
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Meetings
Meeting Type
BCC Regular Meeting
Document Type
Agenda Packet
Meeting Date
06/16/2020
Meeting Body
Board of County Commissioners
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above, presence of oysters on mangrove roots along the shoreline could also be noted so that the County <br />receives a better understanding of this matter. <br />Historical shellfish populations are not well understood throughout the Lagoon, although shell <br />middens and buried shells indicate more extensive reefs existed in the past. Shell middens are heaps of <br />clam, oyster, whelk, or mussel shells associated with past human occupation. It would be beneficial for <br />the County to understand where historical shellfish populations resided so that they could be evaluated <br />as potential areas for restoration. Also, it would be beneficial to understand what types of shellfish were <br />present versus the types present today to see how changing conditions have influenced species types. <br />However, historical knowledge on these topics seems to be limited to local knowledge and there does not <br />seem to be widely completed historical surveys of these populations. While we may not be successful at <br />mapping historical filter feeder populations, it would be beneficial to conduct mapping of current <br />populations and the conditions they live in for future understanding. Monitoring indicators of oyster reef. <br />health and environmental variables allows the comparison of various parameters to oyster reef metrics. <br />Another recommendation is for the County to establish spat (oyster larva) monitoring locations <br />throughout the region to best understand areas of recruitment and survivorship for future populations of <br />oysters. It would also benefit the County to partner with agencies and groups with clam stocks, such as <br />FWC, in order to complete pilot projects of living shorelines with clam components. Clams have not been <br />widely used in restoration projects for the County as of present, so it may be beneficial to diversify the <br />types of filter feeders used. <br />Fish are an important economic and ecological part of the Lagoon system. However, fish <br />populations and abundance have declined from historical populations. The causes of this decline includes <br />overfishing, habitat degradation, and the introduction of invasive species. For example, recent studies <br />have shown invasive Iionfish species are starting to encroach into the Lagoon, even though these species <br />prefer oceanic waters. Lionfish populations have been detrimental to native oceanic fish species, so it is <br />expected that they will also negatively impact native estuarine fish species. Wetlands act as important <br />habitats for the critical life stages of many important fishery species, so their vulnerability to changing <br />conditions in the Lagoon are negatively impacting fisheries as a whole. Also, fish found within the Lagoon <br />serve as an essential food resource for commercially and recreationally important fish and other species <br />of Lagoon wildlife, such as migratory bird populations. Decreasing populations of important fish within <br />the Lagoon will negatively impact the survivability and presence of numerous types of wildlife. <br />While there does not seem to be a lot of fish population studies done in the County's portion of <br />the Lagoon, FWC's Rich Paperno has been doing Lagoon -wide stratified random sampling collections <br />monthly. He was able to provide data for fish hauls within the County from 1996 to 2018, which identified <br />the number and types of fish pulled each month. Based on this information, historical fish numbers peak <br />in November to March with 304 different species of fish identified. These trends need to be further <br />studied in comparison to other Lagoon variables in order to better understand how one may be <br />influencing the other. Also, the data is arranged by month, and not year, so we cannot currently <br />understand what the annual fluctuations of fish populations may be. Throughout the Lagoon, fisheries <br />independent monitoring is done by FWC to understand general populations and community structures of <br />recreational and commercial fisheries. Lagoon -wide, fisheries stocks appear stable, but smaller than <br />historical numbers according to their data. Fisheries dependent monitoring is also done at boat ramps, <br />97 <br />
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