Morphology of the digestive tract and feeding habits of Loricaria lentiginosa Isbrücker, 1979 in a Brazilian reservoir

Salvador-Jr, Luiz Fernando; Salvador, Gilberto Nepomuceno; Santos, Gilmar B.

doi:10.1111/j.1463-6395.2008.00336.x

Cited by 10 publications

(8 citation statements)

References 34 publications

(36 reference statements)

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“…The mouth of the species studied is small and tubular, similar to that observed in herbivorous and bentophagous teleosts (Pavlov & Kasumyan, 2002;Salvador-Jr, Salvador, & Santos, 2009). The lips are fleshy and composed of several papillae, which are possibly destined to the foraging of benthic invertebrates (Rodrigues & Menin, 2005).…”

Section: Discussionsupporting

confidence: 59%

Anatomical characterization of the digestive system of the pufferfish (Chilomycterus spinosus spinosus)

Pereira

Arco

Hoffmann

et al. 2019

Acta Sci. Biol. Sci.

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Descriptive studies of the fish digestive system are fundamental because they provide information on the biology of the species. Thus, the objective of this study was to morphologically describe the digestive system of the pufferfish, Chilomycterus spinosus spinosus. For this, adult specimens of pufferfish (n = 10) of both sexes were used. The animals were fixed with 10% aqueous formaldehyde solution, dissected, analyzed descriptively and photographed. The results demonstrate that the pufferfish has a morphologically modified digestive system, which is adapted to the defense behavior. This species presents a pouch-shaped diverticulum, that is called abdominal pouch, which allows the expansion of the celomatic cavity and the temporary storage of food. Although it is used to store food, macroscopically the abdominal pouch does not show gastric folds. However, this absence is compensated by a small intestine containing innumerable villi.

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Section: Discussionsupporting

confidence: 59%

Anatomical characterization of the digestive system of the pufferfish (Chilomycterus spinosus spinosus)

Pereira

Arco

Hoffmann

et al. 2019

Acta Sci. Biol. Sci.

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“…Reports of algae, detritus, vegetal matter, seed, and benthic matter consumption by loricariids are common [17][18][19] and they are generally classed as omnivorous [20]. Furthermore, consumption of wood is unique to the genus Panaque (Eigenmann and Eigenmann) (Heckel) [20] and Hypostomus cochliodon [21].…”

Section: Introductionmentioning

confidence: 99%

Examination of a Culturable Microbial Population from the Gastrointestinal Tract of the Wood-Eating Loricariid Catfish Panaque nigrolineatus

et al. 2013

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Fish play a critical role in nutrient cycling and organic matter flow in aquatic environments. However, little is known about the microbial diversity within the gastrointestinal tracts that may be essential in these degradation activities. Panaque nigrolineatus is a loricariid catfish found in the Neotropics that have a rare dietary strategy of consuming large amounts of woody material in its natural environment. As a consequence, the gastrointestinal (GI) tract of P. nigrolineatus is continually exposed to high levels of cellulose and other recalcitrant wood compounds and is, therefore, an attractive, uncharacterized system to study microbial community diversity. Our previous 16S rRNA gene surveys demonstrated that the GI tract microbial community includes phylotypes having the capacity to degrade cellulose and fix molecular nitrogen. In the present study we verify the presence of a resident microbial community by fluorescence microscopy and focus on the cellulose-degrading members by culture-based and 13 C-labeled cellulose DNA stable-isotope probing (SIP) approaches. Analysis of GI tract communities generated from anaerobic microcrystalline cellulose enrichment cultures by 16S rRNA gene analysis revealed phylotypes sharing high sequence similarity to known cellulolytic bacteria including Clostridium, Cellulomonas, Bacteroides, Eubacterium and Aeromonas spp. Related bacteria were identified in the SIP community, which also OPEN ACCESS Diversity 2013, 5 642 included nitrogen-fixing Azospirillum spp. Our ability to enrich for specialized cellulose-degrading communities suggests that the P. nigrolineatus GI tract provides a favorable environment for this activity and these communities may be involved in providing assimilable carbon under challenging dietary conditions.

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“…The family to which the wood-eating catfishes belong, the Loricariidae, is composed of many species (680 described taxa in 80 genera; Armbruster 2004 ) that consume animal, plant, and detrital material from the benthos (Delariva and Agostinho 2001 ; Pouilly et al 2003 ; de Melo et al 2004 ; Novakowski et al 2008 ; Salvador et al 2008 ; German and Bittong 2009 ). Wood-eating, however, has evolved twice in the family, as species in the genera Hypostomus (Armbruster 2003 ) and Panaque (Schaefer and Stewart 1993 ) are considered xylivorous (German and Bittong 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Inside the guts of wood-eating catfishes: can they digest wood?

German

2009

J Comp Physiol B

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To better understand the structure and function of the gastrointestinal (GI) tracts of wood-eating catWshes, the gross morphology, length, and microvilli surface area (MVSA) of the intestines of wild-caught Panaque nocturnus, P. cf. nigrolineatus "Marañon", and Hypostomus pyrineusi were measured, and contrasted against these same metrics of a closely related detritivore, Pterygoplichthys disjunctivus. All four species had anatomically unspecialized intestines with no kinks, valves, or ceca of any kind. The wood-eating catWshes had body size-corrected intestinal lengths that were 35% shorter than the detritivore. The MVSA of all four species decreased distally in the intestine, indicating that nutrient absorption preferentially takes place in the proximal and mid-intestine, consistent with digestive enzyme activity and luminal carbohydrate proWles for these same species. Wild-caught Pt. disjunctivus, and P. nigrolineatus obtained via the aquarium trade, poorly digested wood cellulose (<33% digestibility) in laboratory feeding trials, lost weight when consuming wood, and passed stained wood through their digestive tracts in less than 4 h. Furthermore, no selective retention of small particles was observed in either species in any region of the gut. Collectively, these results corroborate digestive enzyme activity proWles and gastrointestinal fermentation levels in the Wshes' GI tracts, suggesting that the wood-eating catWshes are not true xylivores such as beavers and termites, but rather, are detritivores like so many other Wshes from the family Loricariidae.

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Morphology of the digestive tract and feeding habits of Loricaria lentiginosa Isbrücker, 1979 in a Brazilian reservoir

Cited by 10 publications

References 34 publications

Anatomical characterization of the digestive system of the pufferfish (<i>Chilomycterus spinosus spinosus</i>)

Anatomical characterization of the digestive system of the pufferfish (<i>Chilomycterus spinosus spinosus</i>)

Examination of a Culturable Microbial Population from the Gastrointestinal Tract of the Wood-Eating Loricariid Catfish Panaque nigrolineatus

Inside the guts of wood-eating catfishes: can they digest wood?

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