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  • 1
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    Stock Assessment of Arius maculatus (Thurnberg, 1792) (Ariidae, Siluriformes) in Panguil Bay, Northwestern Mindanao (2021)
    In:  nday2jum@yahoo.com | http://aquaticcommons.org/id/eprint/27091 | 25026 | 2020-08-06 01:45:23 | 27091 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: Arius maculatus, commonly known as spotted catfish and locally known as Tambangongo, has a great potential as an aquaculture species, but there is very limited information known for the stocks in Panguil Bay. This study aimed to assess the wild stocks of A. maculatus, and make an inventory of the fishing boat and gears in two stations in Panguil Bay, namely: Tangub, Misamis Occidental and Baroy, Lanao del Norte. Length frequencies were analyzed to provide estimates of growth, mortality, exploitation ratio, and recruitment pulse of A. maculatus in the bay. A total of 589 boats (324 motorized boats and 265 non-motorized boats) were recorded from the sites. There were 473 units of 15 types of fishing gear used in the sites and 6 types of these were only used in catching A. maculatus. A total of 3,259 specimens were collected for 12 months from the sites. The aquatic habitat of A. maculatus from the two sites was characterized by a pH range of 7.9-8.1, temperature of 28.5-29.1°C, salinity of 13.31-15.9 ppt, dissolved oxygen levels of 4.0-5.41 ppm, and total suspended solid values of 0.1-0.6 g/L. Reproductive biology analysis indicates that eggs start to mature from October to December, then spawning starts from January to March, and the fish fry recruitment starts in April and May. A. maculatus can grow up to 98.95 cm with an asymptotic length of 98.86 cm (K value = 0.35) equivalent to asymptotic weigth of 8,750 g. Mortality Z = 0.99, with natural mortality M = 0.67 and fishing mortality F = 0.33. This study revealed that A. maculatus in Panguil Bay is not over-exploited since the exploitation rate (E = 0.33) is minimal and large individuals can still be collected from the field.
    Description: National Fisheries Research and Development Institute
    Keywords: Conservation ; Fisheries ; Management ; Planning ; Policies ; fisheries assessment ; life history ; Panguil Bay ; spotted catfish ; brackishwater
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 40-53
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  • 2
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    Abundance and distribution of Sardinella tawilis (Herre, 1927) larvae in Lake Taal, Philippines (2021)
    In:  http://aquaticcommons.org/id/eprint/26755 | 25026 | 2019-09-13 01:44:59 | 26755 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: As part of the conservation efforts to address the declining population of the only freshwater Sardinella (Family Clupeidae) endemic to Lake Taal, a two-year study was conducted to determine the possible spawning grounds of Sardinella tawilis (Herre, 1927) by identifying the spatial and temporal distribution of its larvae. Fish larval samples were sorted from ichthyoplankton samples collected monthly in selected sampling stations in the lake. The morphologically identified Clupeidae larvae were determined to be S. tawilis genetically. They appeared only during March to May, with maximum abundance reaching from 700 to 1,700 ind 100m-3 during April 2015. Among the 10 water, 5 weather, and 11 biological parameters analyzed using Redundancy Analysis (RDA), temperature and other weather parameters largely influenced the temporal distribution of tawilis larvae. In terms of spatial distribution, the stations on the eastern bay of the lake showed an abundant and consistent presence of tawilis larvae for two years. Other stations which showed the presence of tawilis larvae include the southern portion of the lake, as well as in stations south to southwest area of Volcano Island. The seasonal and site-specific occurrence of tawilis larvae confirmed its spawning season and potential spawning grounds, which can serve as a scientific basis in the establishment of a Tawilis Reserve Area, as stipulated in the Unified Rules and Regulations for Fisheries in the Taal Volcano Protected Landscape Management Plan (TVPL-MP 2011).
    Keywords: Conservation ; Ecology ; Fisheries ; Policies ; endemic ; sardine ; spawning ground ; Clupeidae ; Tawilis Reserve Area
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 16-26
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  • 3
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    Status of Taal Lake Fishery Resources with Emphasis on the Endemic Freshwater Sardine, Sardinella tawilis (Herre, 1927) (2021)
    In:  http://aquaticcommons.org/id/eprint/26775 | 25026 | 2019-09-12 02:32:35 | 26775 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: Assessment of fisheries in Taal Lake was conducted from 1996-2000 and 2008-2011 to know the status of the commercially important fishes with emphasis on the endemic freshwater sardine, Sardinella tawilis. Results of the fish landed catch survey in 11 coastal towns of the lake showed a decreasing fish harvest in the open fisheries from 1,420 MT to 460 MT in 1996 to 2011. Inventory of fisherfolk, boat, and gear also decreased to 16%, 7%, and 39%, respectively from 1998 to 2011. The most dominant gear is gill net which is about 53% of the total gear used in the lake with a declining catch per unit effort (CPUE) of 11kg/day to 4 kg/day from 1997 to 2011. Active gear such as motorized push net, ring net, and beach seine also operated in the lake with a CPUE ranging from 48 kg/day to 2,504 kg/day. There were 43 fish species identified in which S. tawilis dominated the catch for the last decade. However, its harvest also declined from 744 to 71 mt in 1996 to 2011. The presence of alien species such as jaguar fish, pangasius, and black-chinned tilapia amplified in 2009.Population parameters of S. tawilis from 2009 to 2011 were estimated using the FiSAT (FAO-ICLARM Stock Assessment Tool) software. The analysis of length frequency data showed an estimated L∞ of 15.40 to 16.36 cm and K value ranged from 0.53 to 0.73. The total mortality (Z) ranged from 3.01 to 5.03, natural mortality (M) from 1.44 to 1.75, fishing mortality (F) from 1.57 to 3.28 and exploitation rate (E) from 0.52 to 0.65. The high values of fishing mortality and exploitation rates indicate unsustainable fishing practices. Conservation and management measures of the fishery resources in the lake were recommended for appropriate action of the Protected Area Management Board (PAMB)
    Keywords: Conservation ; Fisheries ; Policies ; Taal Lake ; Sardinella tawilis ; fisheries ; population parameters
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 128-135
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  • 4
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    Growth performance and cost efficiency of tilapia (Oreochromis niloticus) and milkfish (Chanos chanos) fed extruded floating and non-floating feeds reared in net cages in Taal Lake (2021)
    In:  http://aquaticcommons.org/id/eprint/26761 | 25026 | 2021-02-27 20:59:44 | 26761 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: This study evaluated the growth and cost efficiency of tilapia (Oreochromis niloticus) and milkfish (Chanos chanos) fed three feed types used in cage farming in Taal Lake, Batangas, Philippines to serve as baseline information for cage aquaculture regulations. O. niloticus and C. chanos were reared in net cages fed three feed treatments: extruded floating feed (EFF), slow-sinking feed (SSF), and sinking feed (SF). Growth performance, feed conversion ratio (FCR), yield, and cost efficiency were compared at harvest. Results of the study showed that EFF had significantly higher mean weight gain, absolute growth and specific growth rate, biomass harvest, percentage good size fish, and FCR than SF in both O. niloticus and C. chanos (P〈0.05), but had no significant difference with SSF in terms of growth parameters (P〉0.05). FCR and biomass harvest were significantly higher in EFF than SF in O. niloticus (P〈0.05) but were not statistically different in C. chanos (P〉0.05). Survival rate was not significantly different among feed types (P〉0.05) in both species. Net profit was significantly higher in EFF than the other feed types (P〈0.05). At the same volume of fish production in the lake, the use of extruded floating feeds in cages lessened the feed cost by 17.91-29.44% for higher net returns and decreased feeds use by 19.64-30.0%, which could minimize negative impacts on the lake water environment. The results of the study revealed the comparative advantage of floating feeds over slow-sinking feeds and sinking feeds and is therefore recommended as the ideal feed type for cage farming in the lake.
    Keywords: Aquaculture ; Fisheries ; extruded floating feeds ; slow sinking feeds ; sinking feeds ; growth performance ; cage aquaculture
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
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    Format: 41-56
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  • 5
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    Value Chain Analysis of Marine Ornamental Fish Industry in the Philippines (2021)
    In:  http://aquaticcommons.org/id/eprint/26763 | 25026 | 2019-09-13 01:49:25 | 26763 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: The Philippines is a major supplier of marine ornamental fish in the world but the understanding of the overall local industry is limited. This study assessed the marine ornamental fish industry in the Philippines using the value chain analysis approach aimed to describe the market chain and key actors, species collected and traded, cost distribution in each of the stakeholders involved, and value addition across actors. Survey interview using purposive sampling was conducted in major collection areas in the country and data gathered was analyzed through a mixed-methods approach and validated by focus group discussions. The results identified the actors in the chain as diver-gatherer, middleman-trader, and exporter. There were 1,431 stakeholders directly dependent on the industry. The annual trade approximately involved a total of 8,554,729 pieces comprised of 1,200 marine species belonging to 144 families contributing PHP 235,496,302.50 to the country’s economy. The bulk of the supply came from Region 4A (61.06%), Region 3 (26.63%), and Region 7 (5.32%). The value chain of the industry was mapped out, revealing a gross value addition of PHP 88.27 per marine ornamental fish. Cost-return analysis showed the last node actors having the highest monthly net return while the lowest in the first node actors. Appropriate programs, policy, and institutional reforms needed to maximize the benefits of the business across key actors and ensure the sustainability of fish resources in the wild were presented.
    Keywords: Aquaculture ; Fisheries ; Policies ; Sociology ; marine ornamental fish ; value chain analysis ; ornamental trade
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 57-74
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  • 6
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    Status of Ornamental Fish Industry in the Philippines: Prospects for Development (2021)
    In:  http://aquaticcommons.org/id/eprint/26991 | 25026 | 2020-03-05 02:00:23 | 26991 | National Fisheries Research and Development Institute, Philippines
    Details
    Publication Date: 2021-07-24
    Description: The ornamental fish business is a lucrative industry worldwide with huge prospects for livelihood and trade, but the Philippines has not developed this industry to its full potential due to some constraints. This study was conducted to assess the ornamental fish industry in the Philippines using purposive survey interview and focal group discussions in major production areas in the country to determine aspects for development. Information on key stakeholders in the marine and freshwater ornamental fish sector; quantity and value of production by region and by species; and trade were generated from the study. Approximately 8,911,879 pieces of marine ornamental fish were exchanged per year, contributing to PHP 137,165,576 in the country’s annual trade. Production of freshwater ornamental fish was 14,304,739 pieces valued at PHP 145,958,667. The bulk of marine ornamental fish supply came from regions with coral reef areas teeming with marine ornamentals, namely: Regions IV-A (65.56%), III (23.18%), and VII (4.63%). Freshwater ornamental fish were produced mainly by Regions IV-A (34.29%), XI (35.41%), VI (11.96%) and III (10.43%) which have existing local markets. The center of trade for marine ornamental fish is Metro Manila and Cebu City due to the presence of international airports. Meanwhile, freshwater ornamental trade is concentrated in major cities and municipalities given the significant number of local hobbyists. An ornamental fish development program is needed to attain the full potential of the industry with an emphasis on (1) captive breeding of marine ornamental and freshwater indigenous fish, (2) tapping the export market for freshwater ornamental fish, and (3) promoting the sustainability of wild-caught marine ornamental fish.
    Keywords: Fisheries ; Management ; marine ornamental fish ; freshwater ornamental fish ; production ; trade
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 82-97
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  • 7
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    Value Chain Analysis of Maliputo, Caranx ignobilis in the Philippines (2021)
    Details
    Publication Date: 2021-10-20
    Description: Maliputo (Caranx ignobilis) is a high-value food fish in the Philippines with limited studies on market potential. This value chain analysis study was conducted to understand the industry, to identify the key actors, supply and value chain, and to identify issues and concerns to support the development of C. ignobilis industry. A survey interview was conducted using purposive sampling in nine maliputo-producing regions with 224 respondents, and focus group discussion validated the analyzed data. Key chain actors identified are fishers, fish cage operators, fish buyers categorized as small-scale (local vendors and peddlers) and large-scale intermediaries (commission agents and wholesalers), and processors (restaurants and resorts). Annual production was 188,722 kg valued at PHP 33,752,859.79 with 58.12% coming from capture fisheries and 41.88% from aquaculture. Major producing regions for captured and cultured C. ignobilis are Regions 2 (Cagayan), 6 (Iloilo), and 3 (Central Luzon). The industry’s value chain map showed a gross value addition of PHP 116.58, 135.65, 75.04, 23.58, and 749.71 per kg maliputo for capture, aquaculture, small-scale fish buyer, large-scale fish buyer, and processors, respectively. Processors attained the highest net returns while fishers got the lowest. This study noted that C. ignobilis is a non-target species in capture fisheries resulting in an inconsistent supply of the fish. For aquaculture, there is a need to improve its culture technology, develop seed production technology, and formulate an artificial diet. Various upgrading strategies to improve the industry and to increase the benefits derived by the key actors had been identified and presented in the paper.
    Description: Published
    Description: Refereed
    Keywords: Caranx ignobilis, value chain analysis, stakeholders ; ASFA_2015::A::Aquaculture industry ; ASFA_2015::A::Aquaculture development ; ASFA_2015::M::Marine fish ; ASFA_2015::M::Marine fisheries
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 137-156
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  • 8
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    Gender Participation in the Fisheries Sector of Lake Taal, Philippines (2022)
    Details
    Publication Date: 2022-01-31
    Description: Lake Taal is a source of livelihood and provides for more than 2,000 sustenance fisherfolk. Fish production of the open water fisheries has dwindled over the years with the continuous decline of fish catch, which can be attributed to unsustainable fishing practices such as illegal fishing, overfishing, pollution, and the expansion of aquaculture activities in the lake. Women, as a sector, constitute almost one half of the economically active population in Lake Taal. Men and women performed different roles at different stages of fish capture or fish culture. In terms of their economic and social value, the participation of women in pre- and post-production activities are significant. This study assessed the level of gender participation in the fisheries sector of Lake Taal. Specifically, it determined the roles of men and women in the different fishing activities and described the fisherfolk’s socioeconomic profile. A total of 407 randomly selected respondents were interviewed in 11 barangays from eight municipalities in Lake Taal, represented by 54% male and 46% female, consisting of 214 fishers, 76 fish vendors, four processors, 51 helpers, and 62 fish cage or fish pond owners, managers, and caretakers. Profiling of the socioeconomic status was done to assess families’ living conditions and constructed primary data based on household’s present roles, activities, responsibilities, access to and control over resources, problems, and constraints of men and women. The roles of both men and women in fisheries were categorized into three sectors: capture, post-harvest, and aquaculture.
    Description: Published
    Description: Refereed
    Keywords: fisheries ; gender participation ; ASFA_2015::F::Fisheries ; ASFA_2015::G::Gender ; ASFA_2015::S::Socioeconomic aspects
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 157-182
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