Realm: Marine
Climate: Temperate/Tropical
Biome: Tropical Coral Central latitude: 29.508715
Central longitude: 34.921117
Duration: 7 years, from 2015 to 2022
Climate: Temperate/Tropical
Biome: Tropical Coral Central latitude: 29.508715
Central longitude: 34.921117
Duration: 7 years, from 2015 to 2022
11375 records
101 distinct species
Across the time series Pomacentrus trichrourus is the most frequently occurring speciesMethods
Two trained SCUBA divers surveyed each knoll's fish assemblage. First, the surveyors documented all free-swimming fish whose home range is larger than one knoll and found within 3 m from the focal knoll, thus considered transient for this scale (i.e., Scaridea, Chaetodontidae, Balistidae, etc.).Next, surveyors circled the knoll slowly and documented knoll-associated fish (e.g., Pomacentridae, Pseudanthias, Pseudochromidae). Lastly, the surveyors thoroughly searched for cryptic fish hidden in cervices and between coral branches (e.g., Apogonidae, Gobiidae). Fish lengths (TL) were estimated and recorded in size classes according to the log2 scale (i,e., bins of 2,4,6,8,16,32,64, etc.,). Fish biomass (g) was calculated based on the weight-lenght equation using the coefficients from FishBase, the midpoint of each size class was used as the fish length. The abundance and Biomass presented here are the mean values of the two surveyors. Surveyor confidence in each fish identification was documented and used for filtering (i.e., certain identification, family-level identification, or low certainty identification), in this database only sure identification is included. It is important to note that the different coral knolls differ in size (surface area ranging from 3 m^2 to 65 m^2), coral cover, and complexity. The grain size specified here is the average surface area of all the coral knolls surveyed in this study. Surveys took place at four close sites located at the coast of Eilat at the northern tip of the Gulf of Aqaba. At each site, 11-23 knolls were surveyed repeatedly over the years. In early surveys, some fish were documented only to the Genus or Family level, however, from 2018 most fish were identified and documented in the field at the species level, and fish size was estimated to the closest cm. In order to make all surveys uniform and comparable, in this data, all fish information (id and size) appear similarly to the way they would have been documented in 2015.Citation(s)
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