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2003-044
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2003-044
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Last modified
9/27/2016 2:00:30 PM
Creation date
9/30/2015 6:22:11 PM
Metadata
Fields
Template:
Official Documents
Official Document Type
Amendment
Approved Date
02/18/2003
Control Number
2003-044
Agenda Item Number
11.G.2.
Entity Name
Dial Cordy and Associates, Inc.
Subject
Beach Preservation Sectors 1 & 2 Amendment No. 4
Archived Roll/Disk#
3160
Supplemental fields
SmeadsoftID
3166
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segments outside the project area. For this reason, pre-construction monitoring and <br /> monitoring of a separate control area will not be necessary for an assessment of the <br /> effects of the project on nesting levels and nesting success . There is also sufficient hatch <br /> success data available for the area to establish a baseline against which to evaluate <br /> potential project effects on hatching success. <br /> Changes in emergence and nesting levels, and nesting success (the proportion of <br /> emergences that culminate in nests) will be assessed by daily nesting surveys of project <br /> area beaches . Survey areas will be patrolled every morning during the nesting season, <br /> and all crawls will be counted, identified to species, and classified as a nesting or non- <br /> nesting emergence (Schroeder and Murphy in Eckert et al. , 1999) . Project area beach <br /> segments will be divided into 1000-foot long survey zones referenced to FDEP beach <br /> monuments . Starting and ending dates for surveying will be established so as to allow <br /> direct comparisons with existing nesting survey data in the County. Nesting levels (nests <br /> per 1000 feet) and nesting success (nests/total emergences) will be calculated separately <br /> for each 1000 foot survey zone. Mean nesting success and mean nesting levels will be <br /> statistically compared between pre- and post-construction years in project and control <br /> areas using ANOVA. Calculations will be performed separately for each species, with the <br /> understanding that green turtle and leatherback data may not be sufficient for statistical <br /> analysis . <br /> Reproductive success will be evaluated by examining the nest contents of a representative <br /> sample of in-situ nests. All nest excavation and handling and release of live hatchlings <br /> shall be in accordance with FWCC guidelines. Expected nesting levels will be used to <br /> design a random selection method resulting in a minimum of 50 nests selected for <br /> hatching success evaluation. Effort will be made to insure that samples are representative <br /> of the entire beach and the entire nesting season. In evaluating reproductive success, nest <br /> contents will be assigned to one of the following categories : hatched egg, unhatched egg, <br /> pipped egg (live hatchling), pipped egg (dead hatchling) , live hatchling, and dead <br /> hatchling. Hatching success will be calculated as the percentage of eggs from a clutch <br /> producing hatchlings that successfully freed themselves from the egg [(hatched eggs/total <br /> clutch size) x 100%] . Emerging success is the percentage of the clutch producing <br /> hatchlings that successfully emerged from the nest { [hatched eggs — (live + dead <br /> hatchlings remaining in nest) / total clutch size] x 100% } . Reproductive success indices <br /> will be statistically compared to available control data using ANOVA to detect <br /> significant differences among means in sample groups in both project and control areas . <br /> In conjunction with daily turtle nesting surveys, we would suggest that USFWS and <br /> FWCC consider relocation of turtle nests laid in areas of the restored beach that are <br /> highly susceptible to being lost to erosion. As restored beaches equilibrate in the first <br /> year following construction, nests laid in the seaward portions of the beach berm are very <br /> vulnerable to being washed out. A recent comprehensive study of a beach restoration <br /> project in Martin County (Ecological Associates, Inc. 1999) identified such erosional <br /> losses as a major and easily preventable impact. Relocation would be restricted to the <br /> first nesting season following construction in the project area, and only nests deemed <br /> highly vulnerable would be relocated. All relocations will be conducted in accordance <br /> 9 <br />
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