International Journal of Marine Science, 2024, Vol.14, No.1, 29-39 http://www.aquapublisher.com/index.php/ijms 32 Figure 1 Mean number of: fish identified, Shannon-Weaver-weaver Diversity Index, species identified, Pomadasys incisus, Diplodus vulgaris andChromis chromis Note: Seasons and zones are: autumn, spring, summer. A: Central core HCAR; B: Inside central core HCAR; C: Individual HCAR; D: Inside individual HCAR; E: Sandy bottom withCaulerpa racemosa Comprehensive data on mean fish counts, species richness, and Shannon-Weaver Diversity Index (H’) per video interval categorized by zone (representing different complexity levels) and year for autumn, spring, and summer seasons (Table 3). Each season includes specific sampling data corresponding to substrata types labelled as A, B, C, D, and E assumed to represent various habitats, ecological niches or AR configurations. This complexity levels are; A) Central core HCAR, B) Interior of the central core HCAR, C) Individual HCAR, D) Interior of individual HCAR, and E) Sandy bottom hosting C. racemosa(Figure 2A; Figure 2B; Figure 2C; Figure 2D). In autumn, zone A displayed the highest mean fish count of 23.0 (sdv. 13.7) per image, indicating relatively higher fish abundance compared to other zones (B, C, D, and E). Zones B and C exhibited lower fish counts, with mean values of 0.5 (sdv. 0.6) and 8.3 (sdv. 0.0) fish per video interval, respectively. Species richness, depicted by the mean number of species per image, remained relatively low across all zones in autumn, ranging from 0.5 to 0.9 species. Zone A exhibited the highest mean species count (0.9), followed by areas C and D. The Shannon-Weaver Diversity Index (H’) in autumn was generally low across all zones, indicating limited fish community diversity after HCAR deployment. Zone A demonstrated the highest diversity with a mean H’ value of 0.14 (sdv. 0.1), while the other areas displayed lower values ranging from 0.06 to 0.22. Table 3 Mean number of fish identified, mean number of species, and mean Shannon-Weaver-weaver Diversity Index per 5 seconds of video from 3 sampled seasons Season Zone Total sdv Nº sp sdv H’ sdv Autumn A 23.0 13.7 0.9 0.9 0.14 0.1 B 0.5 0.6 0.7 0.1 0.06 0.0 C 8.3 0.0 0.5 0.0 0.00 0.0 D 0.0 0.0 0.8 0.0 0.22 0.0 E 0.0 0.0 0.8 0.0 0.08 0.0 Spring A 30.9 26.1 0.8 0.7 0.21 0.2 B 13.6 17.4 0.5 0.4 0.12 0.1 C 9.0 0.0 5.0 0.0 0.39 0.0 D 5.0 1.7 0.6 0.3 0.02 0.0 E 27.0 0.0 0.2 0.0 0.01 0.0 Summer A 36.1 28.4 2.6 2.2 0.81 0.9 B 11.9 5.9 1.5 2.3 0.02 0.0 D 8.2 1.6 0.0 0.0 0.00 0.0 E 1.8 3.6 0.6 0.4 0.15 0.1 Note: A: Central core HCAR; B: Inside central core HCAR; C: Individual HCAR; D: Inside individual HCAR; E: Sandy bottom with Caulerpa racemosa
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