Histogenesis and disappearance of the teeth of the Mekong giant catfish, Pangasianodon gigas (Teleostei)

Kakizawa, Yoshiko; Meenakarn, Wanpen

doi:10.2334/josnusd.45.213

Cited by 13 publications

(5 citation statements)

References 7 publications

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“…Spatially restricted tooth loss (such as the loss of oral teeth in cyprinids or tooth loss on the lower jaw in most frogs) or ontogenetic tooth loss [such as in sturgeons (Peyer, 1968), in armoured catfish (Huysseune & Sire, 1997), or in Pangasianodon gigas , the giant catfish (Kakizawa & Meenakarn, 2003)], reveals the presence of developmental modules in the dentition, as discussed by Stock (2001). In an excellent review, this author analysed the various levels at which modules (units that develop under semi‐autonomous control) can be identified in the vertebrate dentition, and discussed how these could be related to modularity in the genetic control of development.…”

Section: Evolutionary Modifications In the Distribution Of Teethmentioning

confidence: 99%

Evolutionary and developmental origins of the vertebrate dentition

2009

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According to the classical theory, teeth derive from odontodes that invaded the oral cavity in conjunction with the origin of jaws (the 'outside in' theory). A recent alternative hypothesis suggests that teeth evolved prior to the origin of jaws as endodermal derivatives (the 'inside out' hypothesis). We compare the two theories in the light of current data and propose a third scenario, a revised 'outside in' hypothesis. We suggest that teeth may have arisen before the origin of jaws, as a result of competent, odontode-forming ectoderm invading the oropharyngeal cavity through the mouth as well as through the gill slits, interacting with neural crest-derived mesenchyme. This hypothesis revives the homology between skin denticles (odontodes) and teeth. Our hypothesis is based on (1) the assumption that endoderm alone, together with neural crest, cannot form teeth; (2) the observation that pharyngeal teeth are present only in species known to possess gill slits, and disappear from the pharyngeal region in early tetrapods concomitant with the closure of gill slits, and (3) the observation that the dental lamina ( sensu Reif, 1982) is not a prerequisite for teeth to form. We next discuss the progress that has been made to understand the spatially restricted loss of teeth from certain arches, and the many questions that remain regarding the ontogenetic loss of teeth in specific taxa. The recent advances that have been made in our knowledge on the molecular control of tooth formation in non-mammalians (mostly in some teleost model species) will undoubtedly contribute to answering these questions in the coming years.

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Section: Evolutionary Modifications In the Distribution Of Teethmentioning

confidence: 99%

Evolutionary and developmental origins of the vertebrate dentition

2009

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“…The first‐generation teeth of all species for which data exist are small, conical, and – where they have been examined in sufficient detail – lack some of the structural details of their successors (Sire et al ., 2002 and references therein, see also: Berkovitz, 1977; Gosztonyi, 1984; Govoni, 1987). This characteristic first‐generation dentition is found even in some fish that lack oral teeth as adults (Huysseune & Sire, 1997b; Kakizawa & Meenakarn, 2003).…”

Section: Introductionmentioning

confidence: 99%

Ontogenetic transition from unicuspid to multicuspid oral dentition in a teleost fish: Astyanax mexicanus, the Mexican tetra (Ostariophysi: Characidae)

Trapani

Yamamoto

Stock

2005

Zoological Journal of the Linnean Society

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Teleost fishes display a remarkable diversity of adult dentitions; this diversity is all the more remarkable in light of the uniformity of first-generation dentitions. Few studies have quantitatively documented the transition between generalized first-generation dentitions and specialized adult dentitions in teleosts. We investigated this transition in the Mexican tetra, Astyanax mexicanus (Characidae), by measuring aspects of the dentition in an ontogenetic series of individuals from embryos to 160 days old, in addition to adults of unknown age. The first-generation dentition and its immediate successors consist of small, unicuspid teeth that develop extraosseously. Multicuspid teeth first appear during the second tooth replacement event, and are derived from single tooth germs, rather than from the fusion of multiple conical tooth germs. We document that the transition from unicuspid to multicuspid teeth corresponds to a change in the location of developing tooth germs (from extraosseous to intraosseous) and in patterns of tooth replacement (from haphazard to simultaneous within a jaw quadrant). In addition, while the size of the largest teeth scales with positive allometry to fish size, the transition to multicuspid teeth is accompanied by an exceptionally large increase in tooth size. Yamamoto Y, Espinasa L, Stock DW, Jeffery WR. 2003. Development and evolution of craniofacial patterning is mediated by eye-dependent and -independent processes in the cavefish Astyanax. Evolution and Development 5: 435-446. Yamamoto Y, Stock DW, Jeffery WR. 2004. Hedgehog signaling controls eye degeneration in blind cavefish. Nature 431: 844-847.

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“…Large teeth are not present in adult Diamond Darters; hence, larval teeth are lost during early development. Ontogenetic tooth loss also occurs in other fishes, including members of elopiformes and anguilliformes (Fahay 1983), acipenseriformes (Nelson 2006), and siliformes Sire 1997, Kakizawa &Meenakarn 2003). To my knowledge, larval teeth and ontogenetic tooth loss have only been previously reported for a very few number of darters.…”

Section: The Duration Of Spawning Periods Of Diamond Darters and Assomentioning

confidence: 80%

Captive propagation, reproductive biology, and early life history of Crystallaria cincotta (Diamond Darter), Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter)

Ruble¹

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Captive propagation, reproductive biology, and early life history of Crystallaria cincotta (Diamond Darter), Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter) Crystal Ruble Reproductive biology and early life history data are important for understanding the ecology of fishes, and can be used for the management and conservation of rare species. During 2008-2012, a captive propagation study was conducted on Crystallaria cincotta (Diamond Darter), a rare species with a single extant population in the lower Elk River, WV. Also, captive propagation studies were conducting during 2008 on three species of darters of the subgenus Nothonotus: Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter). Water temperatures during Diamond Darter spawning ranged from 11.1-23.3°C. Females and males spawned with quick vibrations to bury eggs in fine sand in relatively swift clean depositional areas. Egg size was 1.8-1.9 mm, and embryos developed within 7-11 days. Diamond Darters were 6.7-7.2 mm TL at hatch. Larvae ranged from 9.0-11.0 mm TL following a 5-10 day period of yolk sac absorption. Larvae were provided Artemia nauplii, Ceriodaphnia dubia neonates, Brachionus rotifers, and powdered foods (50-400 microns). Diamond Darter larvae did not feed in captivity, except for cannibalizing other larvae. Larvae survived for a maximum of 11 days. Larvae had relatively large gapes and teeth, suggesting possible larval piscivory and a need for alternative food sources during captive propagation. During the Nothonotus study, the length of spawning period and associated range of water temperatures for the Wounded Darter (89 days, 16.0-24.0°C) exceeded those of the Spotted Darter (46 days, 17.0-22.5°C) and Boulder Darter (48 days, 17.0-22.5°C). Eggs produced per female were least in the Boulder Darter (163), intermediate in the Spotted Darter (191), and highest in the Wounded Darter (345). Diameters of eggs at deposition and prior to hatch were least for Spotted Darter (1.9-2.0 mm, and 1.9-2.1 mm), intermediate for Wounded Darter (2.1-2.2 mm, 2.4-2.5 mm), and largest for Boulder Darter (2.2-2.4 mm, 2.4-2.6 mm).

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Histogenesis and disappearance of the teeth of the Mekong giant catfish, Pangasianodon gigas (Teleostei)

Cited by 13 publications

References 7 publications

Evolutionary and developmental origins of the vertebrate dentition

Evolutionary and developmental origins of the vertebrate dentition

Ontogenetic transition from unicuspid to multicuspid oral dentition in a teleost fish: Astyanax mexicanus, the Mexican tetra (Ostariophysi: Characidae)

Captive propagation, reproductive biology, and early life history of Crystallaria cincotta (Diamond Darter), Etheostoma wapiti (Boulder Darter), E. vulneratum (Wounded Darter), and E. maculatum (Spotted Darter)

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