Scripps Coastal Reserve

21 Jul, 05 AM - 18 Oct, 06 PM

I will be collecting Tegula eiseni, Tegula funebralis, and Tegula gallina in accordance with the stipulations of my CDFW Specific Use Collecting Permit (S-210970001-22137-001). My active permit allows me to collect 50 individuals of each species from Dike Rock. However, to ensure there is no negative impact on the population, I will only collect 1 out of every 10 individuals of each species I encounter. Tegula individuals will be collected by hand from the intertidal zone, and each individual will be checked for epifauna such as limpets upon collection. Epifauna will be immediately removed and returned to the intertidal zone. In the field I will also double check that the species inhabiting the Tegula shell is indeed a Tegula snail. Any hermit crabs using Tegula shells will be immediately returned to the intertidal zone. No other species will be incidentally captured. Risk to wildlife will be minimized by training all personnel in proper identification of Tegula species. This will ensure that only Tegula eiseni, Tegula funebralis, and Tegula gallina will be captured by hand. Each individual Tegula will be minimally handled - contact will only be made long enough to pick up the individual from the rocky intertidal zone and place it into a plastic collecting bottle. All Tegula individuals will then be immediately transported to my laboratory saltwater aquarium system at California State University, Sacramento. I will also be deploying HOBO temperature logger recorders to obtain the field temperatures experienced by Tegula eiseni, Tegula funebralis, and Tegula gallina. This approach will be based on the one I used previously when measuring field temperatures of Tegula funebralis populations in northern and southern California using “robosnails” (Gleason & Burton, 2016 MEPS). This technique is an accurate, noninvasive way to estimate temperature differences among species. At Dike Rock I will deploy 12 total HOBO temperature recorders (4 for each of the 3 species: T. eiseni, T. funebralis, T. gallina). For each species, 2 HOGO loggers will be placed in the middle portion of the tidal height range, and 2 iButtons will be placed in the upper portion of the range. Multiple HOBO loggers will be used to buffer against potential loss of instrumentation. For T. funebralis 2 HOBO loggers will be placed at ~ +1.0 m above mean lower low water (MLLW; middle portion of range), and 2 HOBO loggers will be placed at + 1.5 m (upper portion of range; Gleason & Burton, 2016). The day before HOBO logger deployment, surveys will be performed to confirm the tidal height ranges, and thus appropriate deployment heights, of T. eiseni and T. gallina. Temperature recorders will be attached to the rock substrate using non-toxic Z Spar Splash Zone boating marine epoxy, and the recorders will be deployed from mid July to mid October 2024, the warmest time of year in southern California.

Visit #92099 @Scripps Coastal Reserve

Approved

Under Project # 57647 | Research

Using the Tegula Genus of Intertidal Snails to Identify Mechanisms Underlying Variation in Thermal Tolerance

faculty - California State University (CSU), Sacramento

Visitor List

Lani Gleason Jul 21 - 24, 2024 (4 days)
Lani Gleason Oct 17 - 18, 2024 (2 days)

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Dike Rock 2 Jul 21 - 24, 2024
Parking at SIO - week days 0 Jul 21 - 24, 2024
Parking at SIO -- weekends 1 Jul 21 - 24, 2024
Dike Rock 1 Oct 17 - 18, 2024