Effect of Light Intensity on Color Performance of False Clownfish, Amphiprion ocellaris Cuvier

Abstract

Color performance of false clownfish, Amphiprion ocellaris Cuvier, was examined under three levels of light intensity (20–50 , 600–850 , and 2700–3500 lx) for 5 wk. The experiment was conducted in nine rectangular glass aquaria (25 × 25 × 20 cm) with three replicates. Each aquarium was stocked with 36 fish, and 3 fish were randomly sampled from each aquarium every other week. Digital images were taken weekly on each individual fish after it was anesthetized in MS‐222. The color performance in hue, saturation, and brightness was quantified using image analysis. In addition to the whole‐body analysis, each fish image was divided into ventral and dorsal parts to assess the body position‐dependent effect. Furthermore, color differences between dorsal fin, anal fin, ventral fin, and caudal fin were also quantified. The whole body was brighter at low light than at medium or at high light intensity. Irrespective of light intensity, the dorsal side was more orange but less bright than the ventral side. Brighter light strengthened overall orange color on fish fins. The dorsal fin and ventral fins appeared more orange than the anal and caudal fins regardless of light intensity and exposure duration. Similar to body color, low light also led to brighter fins, especially for caudal and dorsal fins. Our results indicate that ambient light could regulate fish color performance but could not change the pigment dominance by β‐carotene. Light intensity is unlikely to change the contrast between dorsal and ventral sides, but dim light tends to make fish body brighter, and bright light strengthens orange color on fins.

Effects of photoperiod on growth performance and melanogenesis pathway for skin pigmentation of Malaysian red tilapia

“…Moreover, the mutation of tyrp-1 gene in D. rerio caused the death of some melanophores (Krauss, Geiger-Rudolph, Koch, Nusslein-Volhard, & Irion, 2014). In general, these results mean that photoperiod has a profound effect on melanogenesis particularly on the ventral side of fish skin due to the role of light in controlling circadian rhythm, which regulates and controls chromophores performance (Yasir & Qin, 2009). To the best of our knowledge, this is the first study to show the effect of artificial photoperiod on the coloration of Malaysian red tilapia.…”

EVALUASI KUALITAS WARNA IKAN KLOWN Amphiprion percula Lacepède 1802 TANGKAPAN ALAM DAN HASIL BUDIDAYA

“…Hasil penelitian ini berbeda dengan laporan Yasir & Qin (2009) yang menyatakan bahwa jenis karotenoid dalam kulit ikan A. occelaris paling banyak berupa -karoten yaitu lebih dari 80%, diikuti, zeaxanthin, cantaxanthin, dan astaxanthin. Hasil penelitian justru lebih selaras dengan penelitian Ho et al (2013), yang menunjukkan bahwa terdapat dua jenis karotenoid paling banyak pada A. occelaris berupa astaxanthin dan 4-hydroksizeaxanthin pada kulit ikan klown A. occelaris, dan hanya sedikit terdapat lutein, serta -karoten; karena -karoten sebagian besar dikonversi menjadi vitamin A di dalam usus hewan.…”

KERAGAAN WARNA DAN GENOTIPE CALON INDUK (F0) IKAN CLOWN (Amphiprion sp.) STRAIN BLACK PERCULA

“…Warna yang terlihat tampak lebih oranye dikarenakan posisinya yang bergerak ke arah warna digital merah pada model warna HSB (Gambar 4). Kondisi yang sama juga terjadi ketika warna oranye ikan uji (Gambar 4) dibandingkan dengan spesies A. ocellaris yang memiliki nilai hue berkisar 31-36° (Yasir & Qin, 2009;2010). Warna yang lebih oranye diduga muncul karena adanya dukungan serta asosiasi dengan warna dasar tubuh yang gelap dari ikan uji sehingga warna yang terlihat tampak lebih kontras.…”

“…Warna hitam, kuning-oranye, dan putih pada ikan masing-masing dihasilkan dari sel warna melanophore, xanthophore-erythropore, dan leucophore di mana kualitas warna yang muncul secara fenotipe dapat dipengaruhi oleh kualitas air (Lin et al, 2009), kondisi pemeliharaan (Van der Salm et al, 2003), cahaya (Yasir & Qin, 2009), warna wadah pemeliharaan (Doolan et al, 2008;Turne et al, 2009), hingga nutrisi (Kalinowski et al, 2007;Yasir & Qin, 2010).…”