Larval and early juvenile development of silver therapon, Leiopotherapon plumbeus (Actinopterygii: Perciformes: Terapontidae), reared in mesocosms
![Thumbnail](https://repository.seafdec.org.ph/bitstream/10862/3295/3/3295-AyaFA2017.pdf.jpg)
Associated URL
www.aiep.plPetsa
2017Page views
429Metadata
Ipakita ang buong tala ng itemCited times in Scopus
Share
Abstract
The silver therapon, Leiopotherapon plumbeus (Kner, 1864), is an endemic and economically important freshwater food fish in the Philippines. The natural populations of this species have been declining during the past years, mainly due to intense fishing pressure, habitat degradation, and introduction of invasive alien species. At present, it is considered a target species for domestication and conservation efforts. Despite several attempts of artificial reproduction and larval rearing, little is known on larval and early juvenile development of silver therapon. The presently reported study was therefore intended to fill this gap in the knowledge by determining the growth and describing body proportions, pigmentation, and fin formation of this fish. Newly hatched larvae were reared in mesocosm tanks at a mean temperature of 29.5°C. Larvae up to 30 days after hatching were sampled at irregular intervals and preserved in 5% buffered formalin. Early development stages for 245 preserved specimens were described in detail with reference to changes in morphology, growth and body proportions, pigmentation, and fin formation. Five developmental stages of silver therapon were identified: yolk sac larva (1.88 mm TL), preflexion (2.51 mm TL), notochord flexion (4.50-8.27 mm TL), postflexion larva (6.90-12.21 mm TL), and early juvenile (>13.40 mm TL). Growth was isometric for eye diameter and gape size whereas positive allometry was observed for body depth, head length, and preanal length. Some body proportions showed abrupt changes from preflexion to postflexion larvae before it stabilized during the early juvenile stage. Pigmentation in the form of stellate and punctate melanophores increased with developmental stage, with larvae becoming heavily pigmented from postflexion to early juvenile stage. These morphological changes, together with the full complement of fin rays and squamation observed in specimens larger than 13.4 mm TL, suggest the attainment of the juvenile stage of this species. These morphological changes may explain the food and feeding habits during the early life stages of silver therapon which is critical to their survival and recruitment in the wild and in a mesocosm hatchery environment.
Keywords
growth morphology body proportion fish larvaeSuggested Citation
Aya, F., Corpuz, M. N. C., Laron, M. A., & Garcia, L. M. (2017). Larval and early juvenile development of silver therapon, Leiopotherapon plumbeus (Actinopterygii: Perciformes: Terapontidae), reared in mesocosms. Acta Ichthyologica et Piscatoria , 47(4), 347-356. https://doi.org/10.3750/AIEP/02222
Paksa
fishing effort
; freshwater fishes
; fish
; environmental degradation
; domestication
; food
; fisheries
; allometry
; inland water environment
; developmental stages
; commercial fishing
; population
; biology
; fins
; introduced species
; hatching
; growth
; fishing
; endemic species
; larvae
; nature conservation
; induced ovulation
; biodegradation
; tanks
; chromatophores
; juveniles
; rearing techniques
; species
; mesocosms; food fish
; hatcheries; egg yolk
; reproduction
; animal morphology
; meristic counts
; catch-effort; Philippines
; yolk sac
; land degradation
; pigmentation
; habits
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![ASFA ASFA](/themes/Mirage2/images/AGROVOC-logo.gif)
![AGROVOC AGROVOC](/themes/Mirage2/images/AGROVOC-logo.gif)
![AGROVOC AGROVOC](/themes/Mirage2/images/AGROVOC-logo.gif)
![AGROVOC AGROVOC](/themes/Mirage2/images/AGROVOC-logo.gif)
![AGROVOC AGROVOC](/themes/Mirage2/images/AGROVOC-logo.gif)
![AGROVOC AGROVOC](/themes/Mirage2/images/AGROVOC-logo.gif)
Taxonomic term
Mga koleksyon
- AQD Journal Articles [1222]
Related items
Showing items related by title, author, creator and subject.
-
Endangered fish species and seed release strategies in Vietnam
Chien, Thai Ngoc; Khanh, Nguyen Huu; Truong, Nguyen Xuan (Aquaculture Department, Southeast Asian Fisheries Development Center, 2006)World economic growth has led to considerable changes in the ecosystem in many places and has raised concerns on global resource management particularly aquatic animal resources and their living environment. In Vietnam, ... -
Status of threatened species and stock enhancement activities in the Philippine fisheries
Lopez, Nelson A. (Aquaculture Department, Southeast Asian Fisheries Development Center, 2006)The paper provides the lists of fisheries related species perceived to be extinct, rare, threatened and endangered as covered under the CITES, IUCN and the Bureau of Fisheries and Aquatic Resources (BFAR)-Fisheries ... -
Fishery stock enhancement in Malaysia
Ibrahim, Kamarruddin; Ilias, Zaidnuddin (Aquaculture Department, Southeast Asian Fisheries Development Center, 2006)Species extinction is a global issue that requires all nations to practice sustainable management. This paper aims to examine the status of endangered fisheries species in Malaysia, and highlight some resource management ...