Abstract:

This experiment was conducted to observe the gaping behaviour during spawning. Gaping is the alternate closing and opening of a shell. The dataset consists of values from six oysters which include time, sensor data, and temperature in a CSV data file. Sensor data is the distance between the sensor and magnet in mm. Initial readings are of a closed Oyster (Minimum Sensor Magnet Distance). The experiment was carried out at a hatchery in Pass Christian, Mississippi. Oysters were spawned on the last day 9/10. Spawning took place at the last 2 hours of the data set on September 10th. Induced spawning was for a total period of less than one hour after which the experiment was terminated. Data was transmitted over WiFi (Transmission rates may vary). This dataset supports the publication: Ali, A., Ali, K., Ukpebor, A., Hasan, M., Addy, J., Ikome, O., & Abu-El Humos, A. (2019). Hardware and Software Components of an Oysters’ Gape Measurement System. American Journal of Engineering and Applied Sciences, 12(3), 319–328. doi:10.3844/ajeassp.2019.319.328

Suggested Citation:

Kamal Ali. 2020. Spawning Event: Oyster Gape with Temperature Test Measurements at Pass Christian Hatchery, Mississippi, 2018-09-03 to 2018-09-10. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/8WKRP66V

Publications:

Ali, A., Ali, K., Ukpebor, A., Hasan, M., Addy, J., Ikome, O., & Abu-El Humos, A. (2019). Hardware and Software Components of an Oysters’ Gape Measurement System. American Journal of Engineering and Applied Sciences, 12(3), 319–328. doi:10.3844/ajeassp.2019.319.328

Purpose:

To observe Gaping behavior while spawning.

Data Parameters and Units:

Time since sensor began operating [seconds], oyster gape 1 [mm], oyster gape 2 [mm], oyster gape 3 [mm], oyster gape 4 [mm], oyster gape 5 [mm], oyster gape 6 [mm], temperature [degrees C]. Note that the sensor was restarted during data collection and the timestamp reset each time.

Methods:

A Hall Effect sensor and small magnet were glued to the exterior of the oysters' shells. The distance to the magnet reported by the sensor equals the gape, with the absolute given by subtracting the initial value, which measured the closed shell. An Arduino Nano microcontroller recorded the data at 10Hz and transmitted it at 1 Hz over WiFi to the data server. Transmission rates may vary due to bandwidth changes. Other measurements are available under GRIIDC Unique Dataset Identifiers (UDIs): MS.x838.000:0001 (DOI: 10.7266/6714RTA6), MS.x838.000:0002 (DOI: 10.7266/2WVEN39X), MS.x838.000:0003 (DOI: 10.7266/19E0B35F), and MS.x838.000:0005 (DOI: 10.7266/HX0FM1NM).

Instruments:

Micronas® HAL2425, Hall Effect sensor and an Arduino Nano (Atmega328P processor). In addition, a cellular booster was used to boost the signal from inside the hatchery container, which is a metal Faraday cage, to access the cellular system outside the container. A hotspot was placed inside the container (hatchery) that connected to the cellular system, allowing the sensor to connect via WiFi and upload data to the data server.

Individual Files: