The effect of background colour and lighting of the aquarium on the body pigmentation of the peppered shrimp Lysmata wurdemanni

Abstract

During a 100-day period, the effect of two background colours (white and black) of fish tanks and two light spectrum (red and white) on the growth and pigment expression of juvenile peppermint shrimp Lysmata wurdemanni was evaluated. A completely randomized experimental design was implemented with four treatment groups and a control group (natural illumination). At the end of the study, the survival, weight gain and total carotenoid content in the abdomen and cephalothorax (spectrophotometry) were evaluated, in addition to the expression of the body colour through the analysis of digital images (colour composition RGB). The survival, weight gain (%) and total carotenoid content in the abdomen of the shrimp were similar between treatment groups (p > 0.05); however, the pigment content in the cephalothorax of the shrimp of the black background/red light treatment and the control group were significantly greater (p < 0.05) compared to the carotenoid content of shrimp of the white background/white light treatment. Independently of the total carotenoid content and of the light spectra, the shrimp of the treatments that included black background colour expressed a greater body pigmentation in comparison with those preserved in tanks with white background. These data indicate that the shrimp have a constant concentration of body pigments which they express to a greater or lesser degree depending on the environmental conditions in which they live. This effect of environmental conditions on body pigmentation should be considered during the controlled maintenance and cultivation of the peppermint shrimp. K E Y W O R D Sbody pigmentation, colour composition RGB, environmental conditions, Lysmata wurdemanni, ornamental shrimp

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

“…The lower RGB value obtained for fish reared under darkness environment indicates higher pigmentation compared to fish under light condition. Our observation is in line with the results obtained for peppered shrimp, Lysmata wurdemani, which indicated high pigmentation under darkness background (Díaz, Martha, Hernández, Iván, & Rostro, 2018). Fish under darkness had high pigmentation of reddish-pink colour, which is highly preferred by consumers (Haque et al, 2016).…”

All Shades of Shrimp: Preferences of Colour Morphs of a Freshwater Shrimp Neocaridina davidi (Decapoda, Atyidae) for Substrata of Different Colouration

“…Our findings may be important for shrimp breeders. Using the optimum substratum colour may lead to their faster growth and lower aggression [ 16 , 22 ], and, as a consequence, to higher breeding success and more intense colouration [ 12 , 23 ].…”

Establishing an astaxanthin-rich live feed strain of Pseudodiaptomus annandalei

“…After photography, the copepod individuals were immediately transferred to a 12-well culture plate (3.5 mL/ well), where it was temperately cultivated for further selection. Simultaneously, the RGB value corresponding to the prosome and urosome areas, where the pigments primarily accumulated, was analyzed using Adobe Photoshop CS6 software (Adobe Systems, CA, USA) following the protocol described by Díaz‐Jiménez et al 25 . This approach enabled a rapid assessment of the RGB values for living copepod individuals with no mortality caused, serving as an indicator of the astaxanthin-associated trait for selective breeding in the present study.…”

“…Astaxanthin, the most dominant form of carotenoid pigments in copepods 14 , 22 , is correlated with their body color 23 , 24 . RGB value has been utilized as an indicator for carotenoid content in aquatic animals 25 , 26 . Although the function and causation of astaxanthin accumulation in copepods are not fully understood, studies suggested its role in protecting against oxidative stresses induced by ultraviolet radiation 27 and metal toxicants 28 .…”