Southeast Asian Fisheries Development Center, Aquaculture Department Institutional Repository (SAIR) is the official digital repository of scholarly and research information of the department. This is to enable the effective dissemination of AQD researchers' in-house and external publications for free and online. The repository uses DSpace, an open source software, developed at Massachusetts Institute of Technology (MIT) Libraries. It is an Open Archives Initiative (OAI)-compliant.

Initially, the repository shall contain preprints, full-texts or abstracts of journal articles, books and conference proceedings written by SEAFDEC/AQD scientists and researchers. The aim is to promote these publications especially those published in international peer-reviewed journals and generate higher citation through increased visibility.

It will also provide free access to all in-house publications of SEAFDEC/AQD. Full-text digitized copies of fishfarmer-friendly materials like books, handbooks, policy guidebooks, conference proceedings, extension manuals, institutional reports, annual reports (AQD Highlights), and newsletters (SEAFDEC Asian Aquaculture, Aqua Farm News, AquaDept News and AQD Matters) can be retrieved and downloaded.

In the future, SAIR will expand its collection to include images, presentations, audios, and videos among others.

The objectives of the repository are to: (1) to provide reliable means for SEAFDEC/AQD researchers to store, preserve and share their research outputs and (2) to provide easy access and increase the visibility of SEAFDEC/AQD scientific publications

SAIR also aims to encourage SEAFDEC/AQD researchers for self-archiving and submitting pre-prints from which metadata will be screened and approved by the library staff.

  • Article

    A new species of the sanguinea-group Quatrefages, 1866 (Annelida: Eunicidae: Marphysa) from the Philippines 

    CJ Glasby, MAE Mandario, I Burghardt, E Kupriyanova, LM Gunton & PA Hutchings - Zootaxa, 2019 - Magnolia Press
    A new species of the Marphysa sanguinea group, M. iloiloensis n. sp. (Annelida: Eunicida: Eunicidae), is described from the Marine Annelids Hatchery of the Southeast Asian Fisheries Development Center, Aquaculture Department (SEAFDEC- AQD), Iloilo Province, Philippines. It represents the first record of this group in the Philippines. The new species is most similar morphologically to M. hongkongensa Wang, Zhang & Qiu, 2018, but can be distinguished from it by having fewer branchial filaments, a pair of faint eyes (absent in M. hongkongensa), and in slight differences in jaw morphology and chaetation. The embryos of the new species develop inside a jelly cocoon attached to the entrance of the adult burrow; this is the first time that egg-containing cocoons have been found in any species of the sanguinea-group. Phylogenetic analysis based on the mitochondrial gene cytochrome c oxidase subunit I (COI) revealed that Marphysa iloiloensis n. sp. is genetically distinct from all other analysed Marphysa species and forms a sister group to M. hongkongensa. A revised identification key to members of the sanguinea-group in Southeast Asia is provided.

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  • Article

    Point-of-no-return and delayed feeding mortalities in first-feeding larvae of the silver therapon Leiopotherapon plumbeus (Kner) (Teleostei: Terapontidae) 

    LMB Garcia, MJP Sayco & FA Aya - Aquaculture Reports, 2020 - Elsevier
    This study examined the incidence of mortalities among first-feeding post-yolk sac silver therapon Leiopotherapon plumbeus (Kner) larvae deprived of live food in the hatchery. Starting after their yolk was consumed at 40 h post-hatch (hph) and every 2 h thereafter until 54 hph, larvae were fed and exposed to live food for an hour only and their performance was observed after initial feeding at 25 °C. Feeding incidence progressively increased until 48 hph as larval mouth gape increased during exogenous feeding, but oil globule volume progressively declined until full exhaustion at 52 hph. All starved larvae fed at 48 hph but feeding incidence progressively declined until larvae ceased to feed at 54 hph to coincide with a significant reduction in survivorship, indicating that larvae have reached their point-of-no-return (PNR) at 50 hph despite the availability of food. Delayed initial feeding of un-fed post-yolk sac larvae starting at 46 hph until 54 hph resulted in significantly higher feeding incidence among 46−48 hph larvae than those fed after 50 hph, which did not survive longer than 10 h after initial feeding. These results demonstrate that silver therapon larvae have a very brief transitional or mixed-feeding period of 12 h after yolk exhaustion so that initial feeding beyond 50 hph when larvae have reached their PNR results in early onset of death.
  • Article

    Behavioural evidence for colour vision determined by conditioning in the purple mud crab Scylla tranquebarica 

    G Kawamura, TU Bagarinao, HS Cheah, H Saito, ASK Yong & LS Lim - Fisheries Science, 2020 - Springer Verlag
    Crabs and shrimps (order Decapoda) use colours in various tasks such as foraging and mate choice. Colour vision requires at least two types of photoreceptors with different spectral sensitivities. Previous physiological studies revealed that most crabs including Scylla mud crabs have a single visual receptor system, i.e. they are colour blind. We determined colour vision by means of a behavioural experiment on hatchery-produced and wild-captured purple mud crab Scylla tranquebarica in a roofed hatchery. Adult crabs (8-10 cm carapace width) were subjected to classical conditioning to associate a food reward with a blue or a green stimulus placed among seven shades of grey. The hatchery-produced crabs learnt this task after 14 days of reward training, and thereafter distinguished blue in 27 non-reward trials, and green in 39 non-reward trials. The wild-captured crabs did so after 25 days of reward training, and distinguished green in 49 non-reward trials. These results indicated colour vision in S. tranquebarica. However, the crabs were unable to distinguish blue or green in dim light of 4.4 cd/m2 (which is slightly brighter than full moon light). The high colour vision threshold was attributed to the small optic parameters of the apposition compound eyes of S. tranquebarica.
  • Article

    Morphological descriptions and morphometric discriminant function analysis reveal an additional four groups of Scylla spp 

    There are four species of mud crabs within the genus Scylla, and most of them live sympatrically in the equatorial region. Apart from a report in Japan about the finding of a natural Scylla hybrid more than a decade ago after the division of genus Scylla into four species by Keenan, Davie & Mann (1998), no subsequent sighting was found. Thus, this study investigates the possible natural occurrence of potential hybridization among Scylla species in the wild. A total of 76,211 individuals from mud crab landing sites around the Malacca Straits, South China Sea and Sulu Sea were screened. In addition to the four-purebred species, four groups (SH 1, n = 2, 627; SH 2, n = 136; SH 3, n = 1; SH 4, n = 2) with intermediate characteristics were found, mostly at Sulu Sea. Discriminant Function Analysis revealed that all Scylla species, including SH 1 - 4, are distinguishable via their morphometric ratios. The most powerful discriminant ratios for each character and the top five discriminant ratios of males and females were suggested. The carapace width of SH 1 males and females were significantly smaller than pure species. Based on the discriminant ratios and the description of morphological characters, we hypothesize that the additional four groups of Scylla with intermediate characteristics could be presumed hybrids. Future work at the molecular level is urgently needed to validate this postulate.
  • Newsletter

    AQD Matters 2019 November - December 

    JMV de la Cruz (Ed.) - 2020 - Aquaculture Department, Southeast Asian Fisheries Development Center
  • Article

    Biosecurity policy and legislation for the global seaweed aquaculture industry 

    I Campbell, CSB Kambey, JP Mateo, SB Rusekwa, AQ Hurtado, FE Msuya, GD Stentiford & EJ Cottier-Cook - Journal of Applied Phycology, 2019 - Springer Verlag
    Each year a significant proportion of global food production is lost to pests and diseases, with concerted efforts by government and industry focussed on application of effective biosecurity policies which attempt to minimise their emergence and spread. In aquaculture the volume of seaweeds produced is second only to farmed fish and red algal carrageenophytes currently represent approximately 42% of global production of all seaweeds. Despite this importance, expansion of the seaweed sector is increasingly limited by the high prevalence of recalcitrant diseases and epiphytic pests with potential to emerge and with the demonstrated propensity to spread, particularly in the absence of effective national and international biosecurity policies. Developing biosecurity policy and legislation to manage biosecurity risk in seaweed aquaculture is urgently required to limit these impacts. To understand current international biosecurity frameworks and their efficacy, existing legislative frameworks were analysed quantitatively for the content of biosecurity measures, applicability to the seaweed industry, and inclusion of risks posed by diseases, pests and non-native species. Deficiencies in existing frameworks included the following: inconsistent terminology for inclusion of cultivated seaweeds, unclear designation of implementation responsibility, insufficient evidence-based information and limited alignment of biosecurity hazards and risks. Given the global importance of the cultivation of various seaweeds in alleviating poverty in low and middle income countries, it is crucial that the relatively low-unit value of the industry (i.e. as compared with other aquatic animal sectors) should not conflate with a perceived low risk of disease or pest transfer, nor the subsequent economic and environmental impact that disease transfer may impact on receiving nations (well beyond their seaweed operations). Developing a clear basis for development of robust international biosecurity policies related to the trade in seaweeds arising from the global aquaculture industry, by first addressing the gaps highlighted in this study, will be crucial in limiting impacts of pests and diseases on this valuable industry and on natural capital in locations where seaweeds are farmed.

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