An assessment of fishery resources of Laguna de Bay

Palma, Adelaida L.; Diamante, Adan S.; Pol, Romualdo

doi:10.1080/14634980290031802

Cited by 16 publications

(14 citation statements)

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“…The silver perch, locally known as Ayungin , is an indigenous species in Laguna de Bay (Herre, 1930) and used to be the most abundant fish in this lake (Rabanal et al., 1960; Delmendo and Bustillo, 1968; Mercene and Cabrera, 1991). In a recent survey (Palma et al., 2002), silver perch ranked only third in terms of abundance.…”

Section: Methodsmentioning

confidence: 99%

Meristic and morphometric variation in the silver perch, Leiopotherapon plumbeus (Kner, 1864), from three lakes in the Philippines

et al. 2007

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Summary A number of researchers have applied multivariate methods to elucidate the population structure of fishes. In this study, we also used multivariate techniques to examine meristic and morphological variations in the silver perch, Leiopotherapon plumbeus (Kner, 1864), from three Philippine lakes, namely, Laguna de Bay, Sampaloc Lake, and Taal Lake. We also aimed to determine whether or not there are meristic and morphological differences among the populations of silver perch from the three lakes, considering that this fish species was introduced from Laguna de Bay into Sampaloc Lake and Taal Lake in the late 1950s and early 1970s, respectively. A total of 710 specimens from four different sites were used in the study: 155 each from Binangonan and Tanay areas of Laguna de Bay and 200 each from Sampaloc Lake and Taal Lake. Based on analysis of variance, eight meristic and 26 transformed morphometric characters were selected for subsequent analyses. Nineteen (19) principal components extracted from the 34 significant variables accounted for 82.3% of the variation in the original variables. Factor analysis using varimax rotation produced four factors: factor 1 was dominated by fin measurements while the highest loadings for factor 2 were gill raker counts. Factors 3 and 4 were dominated by various body and head measurements. Cluster analysis showed specimens from Sampaloc Lake and Taal Lake in one group, while majority of the specimens from Binangonan and Tanay are in another cluster. This suggests a closer morphological similarity between specimens from Sampaloc and Taal. Discriminant analysis gave relatively high correct classification rates (76.13–95.50%). Lower gill raker count was the most discriminating variable. Since both the silver perch from Sampaloc Lake and Taal Lake were introduced from Laguna de Bay, the observed clustering and morphological variation could be attributed to similarities and differences in the lake environments. Laguna de Bay is a shallow eutrophic lake, while Sampaloc Lake and Taal Lake are deep lakes. Further studies, however, are needed to determine which of the myriad of biological and/or physico–chemical factors might have the greatest influence on the observed morphological divergence between the source population and transplanted populations that we found in our study.

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Section: Methodsmentioning

confidence: 99%

Meristic and morphometric variation in the silver perch, Leiopotherapon plumbeus (Kner, 1864), from three lakes in the Philippines

et al. 2007

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“…This species comprised the artisanal and subsistence fishery in lakeside communities. However, intense fishing pressure of wild stocks (Palma et al 2002) coupled with the introduction of invasive alien species such as clown knife fish (Chitala ornata) in Laguna Lake and adjacent waters (Cagauan 2007) has led to an increased interest in the domestication and conservation of this species. Reviving the production of this species may help increase the local fish biodiversity; secure food fish supply and provide a sustainable source of livelihood and income in rural areas.…”

Section: Introductionmentioning

confidence: 99%

“…The silver therapon Leiopotherapon plumbeus (Perciformes: Terapontidae) is an important freshwater food fish widely caught in the Philippines (Mane 1934;Yapchiongco and Enriquez 1963;Kock et al 2000;Palma et al 2002). A native species of Laguna Lake on southern Luzon Island, Philippines, this species can reproduce year round, with peaks during the onset of the rainy season (March to May), and attains sexual maturity even at a total length of less & Frolan A. Aya faya@seafdec.org.ph than 15 cm (Mane 1934).…”

Section: Introductionmentioning

confidence: 99%

Embryonic and larval development of hatchery-reared silver therapon Leiopotherapon plumbeus (Perciformes: Terapontidae)

et al. 2015

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The embryonic and larval development of hatchery-reared silver therapon Leiopotherapon plumbeus are described to provide essential information on the early life history of this species. Egg size, larval size at hatching, yolk resorption rate, onset of feeding and development of some morphological characters were examined. Fertilized eggs (430-610 lm in diameter) were spherical, yellowish, demersal and slightly adhesive. First cleavage occurred 6 min post-fertilization and embryos hatched 21-24 h postfertilization under ambient temperature of 27.5 ± 0.1°C. Newly hatched larvae [1.79 ± 0.04 mm in total length (TL)] with yolk volume of 0.579 ± 0.126 mm 3 had no functional or pigmented eyes, mouth or digestive tract. The eyes became fully pigmented and mouth opened [31 and 36.5 hours post-hatching (hph)] shortly before yolk resorption at 39 hph and when larvae had grown to 2.65 ± 0.14 mm in TL. Some morphological characters such as total length, pre-anal length and eye diameter decreased following yolk resorption, which also coincided with the development of foraging capacities shortly before exogenous feeding was initiated. L. plumbeus larvae initiated exogenous feeding at 54 hph, indicating a short (15 h after yolk resorption) transitional feeding period. Larval growth at the early stages of development (54-72 hph) was rapid and steadily increased from 288 to 720 hph, when larvae, 12.05 ± 4.02 mm in TL, closely resembled the external characteristics of their adult conspecifics.

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“…The silver therapon Leiopotherapon plumbeus (Kner 1864) is an endemic and important freshwater food fish species once caught in considerable quantity mainly from Laguna de Bay and other freshwater lakes and wetlands in south Luzon, Philippines (Mane, ; Quilang, Basiao, Pagulayan, Roderos, & Barrios, ; Quilang, Basiao, Pagulayan, Roderos, & Cao, ; Yapchiongco & Enriquez, ). However, intense fishing, rapid development of aquaculture and expansion of human communities near these freshwater bodies since the 1970’s, and the continuing drainage of wetlands have diminished the wild fishery stock of this species (Palma, Diamante, & Pol, ; Santos, Fontanilla, & Quilang, ). In 2014, the silver therapon fishery in the Philippines comprised only 1% of the total inland fishery production of 215,000 mt but it remains a significant source of dietary protein in inland fishing communities (Philippine Statistics Authority, ).…”

Section: Introductionmentioning

confidence: 99%

Gonad development and size‐at‐maturity of silver theraponLeiopotherapon plumbeus(Kner 1864; Teleostei:Terapontidae) in tropical volcanic lakes in south Luzon, Philippines

et al. 2019

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Summary Gonad development of the silver therapon Leiopotherapon plumbeus in two volcanic crater lake habitats (Sampaloc Lake, Taal Lake) in south Luzon, Philippines was examined during the annual reproductive cycle. The minimum body size‐at‐maturity of fish in these two lake habitats was also compared. Four gonad development stages were characterized as basis for the classification of ovarian (immature, maturing, mature, spawned) and testicular maturation (immature, maturing, mature) phases. The occurrence of all development stages in individual gonads suggest an asynchronous development whereby advanced stages are recruited continuously from a pool of younger stage germ cells to result in elevated female and male GSI throughout the annual cycle due to active gonadogenesis. Together with the increasing occurrence of advanced stage oocytes and spermatozoa from March until October, the elevated GSI of fish may indicate peak gonadal growth during the onset of the dry season (December–January) for eventual spawning from the beginning (May–June) until the end of the wet season (October–November). In both lake habitats, male fish were smaller than females but, regardless of sex, the minimum size‐at‐maturity of fish in Sampaloc Lake was significantly smaller than fish in Taal Lake. Overall, asynchronous development during oogenesis and spermatogenesis allows for year‐round reproduction of silver therapon, with elevated gonad growth in the dry season in preparation for spawning during the wet season. Compared with fish in Taal Lake, a smaller size‐at‐maturity of fish in Sampaloc Lake may be a response of the wild fishery stock to long‐term high fishing mortality and degradation of the lake habitat.

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An assessment of fishery resources of Laguna de Bay

Cited by 16 publications

References 0 publications

Meristic and morphometric variation in the silver perch, Leiopotherapon plumbeus (Kner, 1864), from three lakes in the Philippines

Meristic and morphometric variation in the silver perch, Leiopotherapon plumbeus (Kner, 1864), from three lakes in the Philippines

Embryonic and larval development of hatchery-reared silver therapon Leiopotherapon plumbeus (Perciformes: Terapontidae)

Gonad development and size‐at‐maturity of silver theraponLeiopotherapon plumbeus(Kner 1864; Teleostei:Terapontidae) in tropical volcanic lakes in south Luzon, Philippines

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