Species composition of by-catch from milkfish (Chanos chanos) fry fishery in selected sites in the Philippines as determined by DNA barcodes

In spite of the fact that epiphytic algae are considered an important component of freshwater ecosystems, our knowledge of their diversity and distribution is still rather poor. Taxonomic study on the composition of epiphytic algae living on submerged leaf and root tissues of macrophyte Nymphaea pubescens Willd, found at Laguna de Bay (Philippines), was conducted. In total, 21 algal taxa were identified: 10 Cyanophyceae, 6 Trebouxiophyceae, and 5 Bacillariophyceae. The taxa described in this study represent 13 orders, 16 families, 18 genera, and 21 species based on the recent combined taxonomical approach. Of these taxa, the occurrence of a rare cyanobacteria, Chroococcus schizodermaticus West, is reported for the first time in the Philippines. One species is also reported here for the first time in the Philippines, based on current taxonomic nomenclature, and this is Cyanothece aeruginosa (Nägeli) Komárek, which is based on the former name of Synechococcus aeruginosus Nägeli. These taxonomic records are considered important basal information in enriching the knowledge about the diversity and habitat distribution of cyanobacteria and microalgae in macrophytes found in freshwater habitats in the Philippines.

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Aeromonas load and species composition in tilapia ( Oreochromis niloticus ) cultured in earthen ponds in the Philippines

Aquaculture Research ◽

10.1111/are.14820 ◽

2020 ◽

Vol 51 (11) ◽

pp. 4736-4747

Author(s):

Rolando Pakingking ◽

Peter Palma ◽

Roselyn Usero

Keyword(s):

Species Composition ◽

Oreochromis Niloticus ◽

The Philippines ◽

Earthen Ponds

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Ecological response to changes in the structure of water masses in the pelagic of the Canary Current Marine Ecosystem

Trudy VNIRO ◽

10.36038/2307-3497-2020-180-140-155 ◽

2020 ◽

Vol 180 ◽

pp. 140-155

Author(s):

O. Yu. Krasnoborodko ◽

P. P. Chernyshkov ◽

A. Y. Shustin

Keyword(s):

Species Composition ◽

Marine Ecosystem ◽

Biological Species ◽

Pelagic Fish ◽

West African ◽

Water Masses ◽

Sea Bream ◽

Commercial Fish ◽

Water Characteristics ◽

By Catch

Based on the results of sea expeditions, interannual changes in structure of the ichthyocenosis in the pelagic zone of the southern shelf of Morocco in the Atlantic Ocean were studied in connection with changes in the habitat. Mass pelagic fish were selected as reference biological species: European and West African horse mackerel, European sardine, Eastern mackerel, sea bream, sea snipe, myctophids, as well as non-commercial fish species. Field data were obtained during the implementation of complex oceanographic surveys in the fall seasons (October-November) 2015–2018. The results of control trawls were used, in which any species amounted to at least 70 % of the catch. The analysis of the species composition of the control trawls, data of hydroacoustic tracking of trawls, thermohaline water characteristics is carried out. Data pairing was carried out by phased extraction and transformation using standard computer programs for processing various types of data (acoustic, hydrological, ichthyological), as well as specially designed programs that allow you to create a single database. It has been established that recent changes in the number of commercial and by-catch species observed in the ARZ of Morocco in recent years are associated with the presence or absence of so-called “settlement windows”, which appear in the T, S‑diagram field by regions of different configurations, which indicates changes in the ratios of water masses. Based on the identified relationships between changes in the ratio of water masses and changes in the species composition of the control trawls of accounting replenishment surveys, estimates of the expected changes in the biomass of mass pelagic fish in the coming years are made.

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Species composition and plant performance of mixed seagrass beds along a siltation gradient at Cape Bolinao, The Philippines

Marine Ecology Progress Series ◽

10.3354/meps174247 ◽

1998 ◽

Vol 174 ◽

pp. 247-256 ◽

Cited By ~ 49

Author(s):

SS Bach ◽

J Borum ◽

MD Fortes ◽

CM Duarte

Keyword(s):

Species Composition ◽

The Philippines ◽

Plant Performance ◽

Seagrass Beds

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Assessment of Postharvest Losses Due to Catching Undersized Fishery Commodities and Size-Dependent Pricing in the Philippines

The Philippine Journal of Fisheries ◽

10.31398/tpjf/28.2.2020a0018 ◽

2021 ◽

pp. 150-167

Author(s):

Riza Jane Banicod ◽

Ulysses Montojo ◽

Gezelle Tadifa ◽

Deserie Peralta ◽

Charlotte Ann Ramos ◽

...

Keyword(s):

Economic Value ◽

The Philippines ◽

Ecological Impacts ◽

Financial Loss ◽

Postharvest Losses ◽

Resource Sustainability ◽

Regulatory Frameworks ◽

Long Run ◽

By Catch ◽

Catch Rates

The continuing decline in catch rates instigates various fishing adjustments to keep up with the demands of a growing population. Fishery resources are being caught before they can attain their optimum harvestable size. Undersized catch elicits lower economic value; thus, considered as losses in postharvest fisheries. The present study focused on generating actual data on the volume of undersized catches in selected landing sites in the Philippines. It aims to quantify the magnitude of postharvest and financial losses incurred from catching fishery commodities below their marketable sizes. The estimated loss at 0.97% and 4.02% for capture and aquaculture commodities, respectively, was equivalent to PHP 15,235,290 financial loss. Estimation of losses by commodity showed that squid recorded the highest at 20.14%, followed by tilapia (9.61%), blue swimming crab (4.48%), shrimp (2.75%), small pelagics (1.98%), mussel (1.46%), oceanic tuna (0.91%), by-catch (0.79%), milkfish (0.09%), and oyster (0.02%). Excessive catching of undersized BSC and squid in Western Visayas may lead to overexploitation of resources and may adversely affect subsequent recruitment in the long run. The study's results indicate that catching undersized species could lead to substantial postharvest losses and subsequent loss of potential revenue to the industry players. Allowing the stocks to attain their maximum biomass level will minimize postharvest losses; thus, maximizing utilization of resources and benefits derived from the sector. Unrestrained catching of undersized fishery commodities undermines resource sustainability, economic potential, and food security. The strengthening of regulatory frameworks is, therefore, necessary to address both economic and ecological impacts.

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First records of giant pill-millipedes from Laos (Diplopoda, Sphaerotheriida, Zephroniidae)

Zootaxa ◽

10.11646/zootaxa.4563.2.1 ◽

2019 ◽

Vol 4563 (2) ◽

pp. 201 ◽

Cited By ~ 2

Author(s):

THOMAS WESENER

Keyword(s):

Molecular Analysis ◽

Single Species ◽

Sensu Stricto ◽

The Other ◽

Dna Barcodes ◽

Molecular Barcoding ◽

Determination Key ◽

By Catch

Before this study, giant pill-millipedes (order Sphaerotheriida) were unknown from Laos despite their presence in all surrounding countries. As by-catch from collections by arachnologists, 31 specimens of Sphaerotheriida from Laos became available for study. The sample included 14 species. Three species were only represented by females, which are described but cannot be named. Of the remaining 11 species, a single species belongs to the genus Zephronia Gray, 1832: Z. laotica n. sp.; and the other ten belong to the genus Sphaerobelum Verhoeff, 1924: S. bolavensis n. sp., S. phouloei n. sp., S. denticulatum n. sp., S. spinatum n. sp., S. lachneeis n. sp., S. peterjaegeri n. sp., S. nigrum n. sp., S. splendidum n. sp., S. laoticum n. sp., and S. schwendingeri n. sp. This more than doubles the known diversity of Sphaerobelum. Here, I integratively describe these species, combining morphology and DNA barcodes with a molecular analysis including all Zephroniidae species deposited on GenBank—including the only giant pill-millipede species known from Cambodia, Zephronia dawydoffi Attems, 1953. An updated determination key to the species of the genus is presented. Zephronia laotica n. sp. belongs to the monophyletic Zephronia sensu stricto group, which is confirmed by molecular barcoding. In contrast, most species of Sphaerobelum are in a weakly supported clade. Genetically, Sphaerobelum species differ greatly from one another, with most p-distances >15%. The lowest observed p-distance (9.8%) is between S. truncatum Wongthamwanich et al. 2012 from Thailand and S. peterjaegeri n. sp.

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