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  • Newsletter

    AQD Matters 2018 March - April 

    JMV de la Cruz (Ed.) - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • AQD Matters 2018 September - October 

    RH Ledesma (Ed.) - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2018 July - August 

    JMV de la Cruz (Ed.) - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2018 May - June 

    RH Ledesma (Ed.) - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 45th Anniversary Special Issue 

    RDB Dianala (Ed.) - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2018 January - February 

    RH Ledesma (Ed.) - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Book

    Biology and hatchery of mangrove crabs Scylla spp. 

    ET Quinitio, FD Parado-Estepa & JJ dela Cruz-Huervana - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
    Series: Aquaculture extension manual; No. 34
    This manual includes the biology of crab (Scylla serrata, S. tranquebarica, and S. olivacea), and describes principles and procedures for spawning the mature crabs and rearing the zoea to ‘fly’ size crabs. It focuses on the hatchery rearing of S. serrata as the farming of this species is more economically viable than the two other species. The techniques may be modified depending on the conditions or problems encountered in a specific site.
  • Report

    SEAFDEC/AQD Highlights 2017 

    Southeast Asian Fisheries Development Center, Aquaculture Department - 2018 - Aquaculture Department, Southeast Asian Fisheries Development Center
    SEAFDEC/AQD Highlights 2017 is SEAFDEC/AQD’s annual report updating on its accomplishments and progress for the year 2017.
  • Newsletter

    AQD Matters 2017 May - June 

    GK Faigani (Ed.) - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2017 July - August 

    JMV de la Cruz (Ed.) - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2017 September - October 

    RH Ledesma (Ed.) - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Book

    Diseases of juvenile and adult mud crab Scylla spp. in the Philippines 

    EA Tendencia, MVC Cabilitasan & E Tobias-Quinitio - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
    Series: Aquaculture extension manual; No. 64
    This manual aims to provide updated information on the diseases of mud crabs initially authored by Lavilla-Pitogo and dela Peña (2004). It includes the name of the disease, causative agent, stages affected, effects on mud crab and methods of prevention and control. Except for the infectious diseases caused by viruses, which can be detected through molecular methods, most of the diseases can be visually diagnosed. Photographs of the external and internal anatomy of a normal mud crab, including the different sexes and species are included to help readers differentiate a normal from a diseased mud crab.
  • Newsletter

    AQD Matters 2017 March - April 

    RH Ledesma (Ed.) - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2017 November - December 

    JMV de la Cruz (Ed.) - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Newsletter

    AQD Matters 2017 January - February 

    JMV de la Cruz (Ed.) - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Book

    SEAFDEC/AQD Highlights 2016 

    Southeast Asian Fisheries Development Center, Aquaculture Department - 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
    Highlights 2016 is SEAFDEC/AQD’s annual report updating on its accomplishments and progress for the year 2016.
  • Conference paper

    Diseases affecting wild and farmed mud crab in the Philippines 

    EA Tendencia & MVC Cabilitasan - In ET Quinitio, FD Parado-Estepa & RM 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, 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
    Mortalities due to cannibalism and diseases have been reported as major problems in the grow-out phase of mud crab production. This study aimed to identify and describe diseases affecting farmed and wild mud crab (mangrove crab) including predisposing, risk and protective factors, and possible prevention and control measures. A total of 767 wild and farmed mud crab samples were collected. External examination showed abnormalities such as short abdominal flap, discoloration of the abdominal region, darker carapace, lesions on carapace, claws and legs, and presence of epibionts like algae and the barnacles Balanus sp. on the carapace. Internally, necrotic, black and brown gills, and discolored gonads were observed. Stalked barnacles, Octolasmis spp., were observed in the gills. White spot syndrome virus (WSSV) was detected in 14 samples sourced from farms and Infectious hypodermal and haematopoietic necrosis virus (IHHNV) in 2 wild samples. WSSV was implicated in mortality cases. Low temperature and presence of WSSV positive shrimp were identified as risk factors for WSSV infection or outbreak. Pathogenicity tests for some isolated bacteria suggested that these may cause mortality in mud crab under stressful conditions. To prevent mortality due to WSSV infection, it is recommended to avoid polyculture of mud crab with shrimp and/or other crustaceans.
  • Conference paper

    Updates on the larviculture of mud crab at SEAFDEC/AQD 

    ET Quinitio, JJDC Huervana, JC Virgula & FD Parado-Estepa - In ET Quinitio, FD Parado-Estepa & RM 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, 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
    Although the mud crab (Scylla serrata) hatchery technology has been developed, issues such as high cost of production due to the need for additional facilities and labor for natural food culture, inconsistent survival rate at megalopa stage due to Molt Death Syndrome (MDS), and disease due to luminescent bacteria (Vibrio spp.), remain to be addressed. Refinements on the existing mud crab larviculture technology were done to address these problems.

    Poor nutrition, low water temperature and application of prophylaxis during the zoea l stage have been identified as possible causes of MDS. Six shrimp formulated diets (FD) were tested, and 3 of these proved to be suitable for mud crab larvicuture. Larval performance was compared using the 3 diets + natural food (NF, rotifers and Artemia) and NF alone as control. No significant difference was noted in the survival among the 4 treatments, although BP Nippai fed larvae had higher values. Lesser occurrence of MDS was observed in all the larvae fed FD+NF. Three mud crab larval diets with various attractants (squid, annelids, and squid + annelids) were also formulated and fed to the larvae. Results showed no significant difference among the 3 diets. The results of another experiment investigating the effects of the reduction of natural food showed that larvae fed 50% NF + 50% FD and 75%NF + 25% FD had higher survival compared to those fed 75% AD +25% NF and no NF at all. The results indicate that the larvae cannot survive with formulated diet alone. It has been observed that frequency of antibiotic application can be reduced to every 5 days if good quality mud crab larvae are used. Formalin stress test proved to be a reliable method to determine the quality of a batch of newly hatched zoeae. All prophylactic treatments are stopped when megalopae reach the benthic stage.

    To accelerate the dissemination of science-based mud crab hatchery technology to industry stakeholders, SEAFDEC/AQD entered into an agreement with private hatchery operators, State Universities and Colleges, and Local Government Units on giving assistance during initial hatchery operations. Technicians were given free training, followed by in-situ hatchery operations with assistance from SEAFDEC/AQD with the funding from PCAARRD-DOST. Crablets are now being produced by the collaborators. Increase in the production of hatchery-reared crablets will eventually reduce the dependence on wild-sourced mud crab seed stock for farming.
  • Conference paper

    Capacity building initiatives of Winrock International on mud crab culture in the Caraga Region 

    J Nobillos, D Gudahl & J Orprecio - In ET Quinitio, FD Parado-Estepa & RM 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, 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
    The paper presents the output of the capacity building initiatives of Winrock International on Mud crab culture in the Caraga Region, Philippines. The capacity building seminar included lectures on the mud crab biology, pond preparation, nursery and grow-out culture, fattening, and soft-shell crab farming. Identification of the various crab body parts, actual pond preparation, nursery and grow-out culture of crab were demonstrated after the series of lectures.
  • Conference paper

    Mud crab production trials at the College of Fisheries and Marine Sciences, Aklan State University, New Washington, Aklan 

    YH Primavera-Tirol, R de la Cruz & EB Pastrana - In ET Quinitio, FD Parado-Estepa & RM 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, 2017 - Aquaculture Department, Southeast Asian Fisheries Development Center
    Two hatchery and nursery trials have been conducted at the College of Fisheries and Marine Sciences, Aklan State University (ASU) for the Multi-species Hatchery and Fishfarm Project from August to September 2014 and April to May 2015, in collaboration with the Aquaculture Department (AQD), Southeast Asian Fisheries Development Center (SEAFDEC) under the National Mud Crab Science and Technology Program of the PCAARRD-DOST.

    Two ASU staff underwent training on Mud Crab Hatchery, Nursery and Grow-out Operations at SEAFDEC/AQD from September to October 2013. This was followed by SEAFDEC/AQD’s provision of technical assistance during the actual hatchery and nursery operations using Scylla serrata at ASU. Survival rates of 3% and of 66-76% were recorded in the hatchery and nursery phases, respectively. The natural food consisting of rotifer and Artemia, and commercial formulated diet were fed to S. serrata larvae (zoea to megalopa). Juvenile crabs were fed formulated feeds and molluscs. Water temperature ranged from 27 to 30°C and salinity from 29 to 33 ppt in the hatchery. Initial results and insights are discussed and evaluated as guide for future hatchery and nursery protocols.

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