Now showing items 1-5 of 5

    • Book

      Diseases of penaeid shrimps in the Philippines 

      MCL Baticados, ER Cruz-Lacierda, M de la Cruz, RC Duremdez-Fernandez, RQ Gacutan, CR Lavilla-Pitogo & GD Lio-po - 1990 - Aquaculture Department, Southeast Asian Fisheries Development Center
      Series: Aquaculture extension manual; No. 16
      The manual provides information on the diseases that affect the 3 major species of shrimps culture in the Philippines: Penaeus monodon, P. merguiensis and P. indicus. It includes the common name of the disease, causative agent, species affected, stages affected, gross signs, effects on the host and methods of prevention and treatment.
    • Article

      Larval mycosis in Penaeus monodon 

      MCL Baticados, GL Po, CR Lavilla & RQ Gacutan - Kalikasan: The Philippine Journal of Biology, 1979 - University of the Philippines, Los Baños
      A phycomycetous fungus, presumably a Lagenidium, was observed to infect Penaeus monodon larvae. Monitoring of the hatchery in 1976 and 1977 showed that it occurred in 35 out of 51 and 22 out of 37 runs, respectively. So devastating was the infection that whole tank populations had to be discarded after 48 hr.

      Extramatrical tubes are sent out profusely; a discharge vesicle is formed from each tube. The cytoplasmic contents of the hypha then flow into the vesicle, and zoospore formation occurs. Zoospore release is facilitated by rupture of the vesicle after continuous movement of the zoospores. The hyphae in infected larvae measure 2.5-6.3 microns wide. The discharge vesicles are 14.5-25.0 microns in diameter; each one releases 14-32 zoospores 3.8-6.3 microns wide by 5.0-6.3 microns long.
    • Article

      Occurrence and pathology of an Amyloodinium-like protozoan parasite on gills of grey mullet, Mugil cephalus 

      MCL Baticados & GF Quinitio - Helgolander Meeresuntersuchungen, 1984 - Biologische Anstalt Helgoland
      In cultured grey mullets, Mugil cephalus L., mortalities caused by a dinoflagellate-like parasite were observed under normal rearing conditions. Moribund fish were abnormally swimming near the water surface and exhibited haemorrhagic areas on the head, around the mouth and on the body surfaces. Their gills displayed whitish spots as well as haemorrhagic areas and showed excessive mucus production. Microscopic examination of these whitish spots revealed structures highly resembling the trophonts of Amyloodinium attached to the gill filaments. The most consistent feature of this parasitic infestation was lamellar disintegration or degeneration. Early stages of the infestation showed epithelial lifting and lamellar detachment, eventually leading to the disruption of the lamellae and lamellar tissue degeneration. The parasites were associated with large necrotic areas in the gills and caused degeneration of the gill ray tissues. Hyperplasia of the gill epithelium and lamellar fusion were also observed, with the parasites enclosed by the fused lamellae. These structural alteration may have caused osmoregulatory and respiratory difficulties which ultimately led to the observed mortalities.
    • Article

      Studies on the fungal diseases in crustaceans. II. Haliphthoros philippinensis sp. nov. isolated from cultivated larvae of the jumbo tiger prawn (Penaeus monodon) 

      K Hatai, BZ Bian, MCL Baticados & S Egusa - Transactions of the Mycological Society of Japan, 1980 - Mycological Society of Japan
      Haliphthoros philippinensis sp. nov., isolated from larvae of P. monodon is described and illustrated as new. The fungus grew at a temperature range of 13.5-36.3 C, with the optimum of 29.3-34.5 C. Growth occurred in peptone-yeast extract-glucose broth containing 0.3-7% NaCl, with optimum concentrations of 1-4%. At 8% NaCl concentrations, growth was not observed. Its pH range for growth was 5-11.
    • Conference paper

      The use of chemotherapeutic agents in aquaculture in the Philippines 

      MCL Baticados & JO Paclibare - In M Shariff & RP Subasinghe (Eds.), Diseases in Asian Aquaculture I. Proceedings of the First Symposium on Diseases in Asian Aquaculture, 26-29 November 1990, Bali, Indonesia, 1992 - Asian Fisheries Society, Fish Health Section
      Chemotherapeutants are widely used to treat diseases of fish, specifically shrimp and aquarium fishes in the Philippines. The most commonly treated diseases are luminous vibriosis, filamentous bacterial disease, shell disease, larval mycosis and protozoan infections in shrimp and white spot, velvet disease, fin and tail rot, crustacean and monogenean infections, fungal infections and dropsy in finfishes. These chemicals include chloramphenicol, erythromycin, oxytetracycline, nitrofurans, formalin, malachite green, potassium permanganate, copper sulfate and Neguvon. The indiscriminate use may cause mortalities and morphological deformities in the host, development of resistant strains of bacteria and public health hazards. The Philippine government has embarked on regulating the use of these chemicals. Initially, use of chloramphenicol has been banned in food producing animals. In the near future, rules and regulations on the registration and labelling of these chemicals will be implemented. While these are a welcome development, much still needs to be done. It is recommended that medically important drugs be excluded from aquaculture. The campaign on the careful and restricted use of drugs should be intensified in both drug and aquaculture industries. Further research must be done on the screening of other drugs which are effective and environmentally safe. Lastly, funds should be allocated for research, extension and manpower development in fish health management, specifically, in chemotherapy.