Morphological deformities in mud crab Scylla serrata juveniles exposed to antibiotics during the larval stage
MetadataShow full item record
The effects of antibiotics on the survival, growth and external deformities of mud crab Scylla serrata larvae and juveniles were determined. Zoeae were exposed to 0, 3, 6, 9, 12 mgL-1 oxytetracycline (OTC) and 0, 0.5, 1, 1.5, 2 mgL-1 furazolidone (furan) until the late megalopa in the first and second experiments. The treatments that gave the best results in the first and second experiments were conducted simultaneously in the third experiment. The surviving crab instar from each replicate were grown in nursery tanks for one month. Significantly higher survival and faster growth rate of Z5 were attained when 3 and 6 mgL-1 OTC or 0.5 and 1 mgL-1 furan were used. Morphological deformities observed in zoea 5 were bent dorsal, rostral and furcal spines. Percentage occurrence of morphological deformities was similar in all treatments. Significantly (P<0.05) higher survival and faster growth were attained among Z5 in the treatments using 3 mgL-1 OTC and 0.5 mL-1 furan in the third experiment. Morphological deformities observed in juveniles were fused frontal and lateral spines, asymmetrical and depressed tip of abdominal flap and gap between sternites. High percentage of deformities was observed in juveniles that were previously exposed to 6 mgL-1 OTC or 1.0 mgL-1 furan. There was no significant difference (P>0.05) observed in the survival of juveniles in both treatments of OTC and furan. However, growth was significantly (P<0.05) faster in lower concentrations of the two antibiotics. The study shows the apparent negative effects of antibiotics and highlights the need to eliminate or find alternatives, thereby preventing possible harm to the organisms and the environment.
Pates Jr., G. S., Quinitio, E. T., Quinitio, G. F., & Parado-Estepa, F. D. (2017). Morphological deformities in mud crab Scylla serrata juveniles exposed to antibiotics during the larval stage. In E. T. Quinitio, F. D. Parado-Estepa, & R. M. Coloso (Eds.), Philippines : In the forefront of the mud crab industry development : proceedings of the 1st National Mud Crab Congress, 16-18 November 2015, Iloilo City, Philippines (p. 146). Tigbauan, Iloilo, Philippines: Aquaculture Department, Southeast Asian Fisheries Development Center.
Showing items related by title, author, creator and subject.
Waiho, Khor; Fazhan, Hanafiah; Quinitio, Emilia T.; Baylon, Juliana C.; Fujaya, Yushinta; Azmie, Ghazali; Wu, Qingyang; Shi, Xi; Ikhwanuddin, Mhd; Ma, Hongyu (Elsevier, 2018)The increasing global demand for mud crabs (genus Scylla) and threats to the wild populations highlight the urgency of fully rearing them in captivity. Despite considerable progress in mud crab production, most crab farms ...
Seasonal abundance, distribution and recruitment of mud crabs (Scylla spp.) in replanted mangroves Walton, Mark E.; Le Vay, Lewis; Lebata, Junemie H.; Binas, Joseph; Primavera, Jurgenne (Elsevier, 2006)The abundance and distribution of mud crabs were studied in a replanted mangrove forest in Buswang, Aklan, Philippines. Two fishing gears, lift nets and bamboo traps, were used to monitor relative abundance of Scylla spp. ...
Quinitio, Emilia T.; Parado-Estepa, Fe D.; Huervana, Joana Joy; Burlas, Michael Ray (Aquaculture Department, Southeast Asian Fisheries Development Center, 2015)Widespread interest in mud crab species is increasing because these are highly prized both in domestic and export markets. Among the three mud crab species commonly found in the Philippines, Scylla serrata, S. olivacea, ...