Detection of Mycobacterium marinum in clinically asymptomatic Siamese fighting fish (Betta splendens) from ornamental fish shops in Chiang Mai Province, Thailand

Siamese betta fighting fish (Betta splendens) is the one of exports comodity of ornamental fish in Indonesia, but the problems of culture that fish is sex ratio of female higher than male. This research aimed to evaluate the effectiveness of java long pepper (Piper retrofractum Vahl) for betta siamese fighting fish masculinizations through larval immersion. This research was designed by randomized completely design with three treatments of different java long papper doses (0,5 mg/L, 1 mg/L, and 2 mg/L), positive control (17α-metiltestosteron 20 mg/L), and negative control with there replications for each treatments. The treatments of java long pepper doses was given to thirty larvae (D4) through immersion during 24 hours. The research showed that java long pepper extract with dose 2 mg/L obtained the higher male ratio (59,82%) compared with dose 0,5 mg/L (45,11%), 1 mg/L (53,92%), and negative control (23,23%). Java long pepper extract with dose 2 mg/Lincreased the male ratio 36,59% compared with negative control. Java long pepper extract have no effect for survival rate of siamese betta fighting larvae during cultured.

Download Full-text

The current state of biosecurity and welfare of ornamental fish population in pet fish stores in Chiang Mai Province, Thailand

Veterinary Integrative Sciences ◽

10.12982/vis.2021.025 ◽

2020 ◽

Vol 19 (2) ◽

pp. 277-294

Author(s):

Banthita Saengsitthisak ◽

◽

Veerasak Punyapornwithaya ◽

Wasana Chaisri ◽

Raktham Mektrirat ◽

...

Keyword(s):

Life Quality ◽

Fish Population ◽

Ornamental Fish ◽

Human Consumption ◽

Fish Disease ◽

Fish Health ◽

Chiang Mai ◽

Fish Welfare ◽

Drug Usage ◽

Chiang Mai Province

Aquaculture has undergone extensive development in recent decades due to its use as a source of protein for human consumption, as models for scientific research, and as pets. The purpose of this study was to survey ornamental fish stores in Chiang Mai province, Thailand to identify practices which affect life quality and welfare of pet fish including general management, biosecurity management, and knowledge about fish disease and drug usage of ornamental fish store owners. The results show that most pet fish stores have poor husbandry in terms of fish health based on the observed incidence of skin erosion and fin rot (92.86%) and white spots on the skin (78.57%) in store fish. Moreover, treatment of these health conditions were performed by experienced people working in the stores without consulting a veterinarian. The top three drugs used for treatment included malachite green oxalate, trichlorfon, and formalin. Interestingly, oxytetracycline and chlortetracycline were also used frequently to treat fish disease. Despite a lack of formal training in fish management, fish health, and drug usage in ornamental fish, the knowledge of owners about fish disease and antibacterial agent usage was determined to be of an intermediate level based on testing. The information gained from this study can be used in future studies to identify stressors that affect pet fish welfare and to investigate biosecurity and ornamental fish welfare in the other sectors of the ornamental fish trade supply chain.

Download Full-text