Anatomical features and histology of the digestive tract of two related neotropical omnivorous fishes (Characiformes; Anostomidae)

Albrecht, Martina; Ferreira, Marisa Francisco; Caramaschi, Érica Pellegrini

doi:10.1111/j.1095-8649.2001.tb02261.x

Cited by 94 publications

(112 citation statements)

References 23 publications

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“…The presence of two pyloric caeca with similarly folded mucosa increases the area available for digestion and nutrient absorption (Buddington & Diamond, 1987, Buddington et al;Albrecht et al).…”

Section: Discussionmentioning

confidence: 99%

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract

Rodrigues

Cargnin-Ferreira

2017

Int. J. Morphol.

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of the pirarucu (Arapaima gigas) digestive tract. Int. J. Morphol., 35(3):950-957, 2017. SUMMARY:The present study describes the morphology and histology of the digestive tract of juvenile pirarucu, which is a Neotropical fish species with great potential for aquaculture in the Amazon region. Three size classes of pirarucu juveniles from commercial fish farms were sampled for histological examination of the oesophagus, stomach, pyloric caeca, intestine and liver. The morphological and histological features of the pirarucu digestive tract are similar to other carnivorous teleosts and enable the species to ingest, store and digest large food items. Acidic and neutral mucins are secreted by the mucosa of the oesophagus, stomach, pyloric caeca and intestine to protect the mucosal epithelium and to lubricate and facilitate food passage along the digestive tract. Complex transverse folds are predominant in the intestinal mucosa and most likely contribute to optimization of the digestion and nutrient absorption processes, thereby offsetting the relatively short length of the intestine. The exocrine pancreas appears diffuse in the liver and mesentery around the pyloric region of the stomach, pyloric caeca and initial part of the intestine. The digestive tract morphology and thickness become increasingly developed with the size of pirarucu.

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Section: Discussionmentioning

confidence: 99%

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract

Rodrigues

Cargnin-Ferreira

2017

Int. J. Morphol.

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“…According to Santos et al (2007), the largest number of oxyntic glands may be related to higher demand in the production of secretion and ability to digest proteins since the fish eats live prey or food rich in protein. Albrecht et al (2001) studied the histology of the digestive tract in Scomberomorus cavalla and described the gastric glands as being few in number. In the anterior intestine (trophy), their number decreased considerably in the pyloric region; in the next portion of the intestine they did not occur or just looked as gland remnants.…”

Section: Discussionmentioning

confidence: 99%

“…Sections were submitted to histochemical reactions for the identification of mucopolysaccharides (glycoconjugates) (BANCROFT; GAMBLE, 2002 in goblet cells (blushing neutral glycoconjugates). For the detection of mucopolysaccharides rich in acidic sulfate groups the technique of Alcian Blue (AB) pH 1.0 was used, whereas the reaction used was combined with periodic acid-Schiff (PAS) and Alcian Blue (AB) pH 1.0 for the joint detection of acid and neutral mucopolysaccharides.…”

Section: Histological and Histochemistry Of The Gastrointestinal Tractmentioning

confidence: 99%

<b>Morphological and anatomical characterization of the digestive tract of Centropomus parallelus and <i>Centropomus undecimalis</i></b> - doi: 10.4025/actascibiolsci.v35i4.14352

Machado

Souza

et al. 2013

Acta Sci. Biol. Sci.

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ABSTRACT. Centropomus parallelus and C. undecimalis are the most common species of Centropomidae in Brazil. Some authors attribute their failure to grow under in artificial conditions due to limited knowledge on the morphological and functional development of their digestive system and on nutrition requirements of both species. Current research characterizes histologically and histochemically the digestive tract of C. parallelus and C. undecimalis to provide a histophysiological assessment for studies related to their nutritional needs. In the esophagus, the mucous cells in the epithelium stained positively for PAS and AB. In the stomach, positive reactions to PAS and negative to AB respectively occurred on surface and mucous cells in the epithelium and in the lamina propria. In the intestine, goblet cells showed ratio similarity, with mucus being positive in AB and PAS. A greater concentration of these cells existed in the middle and distal intestine, with a greater increase of secretions when compared to those in the proximal intestine. Results show that C. parallelus and C.undecimalis display the main features of the digestive tract of carnivorous fish, a well-developed stomach and a relatively short intestine. In fact, they give insights for future studies on the mechanisms related to the species's digestive and absorptive physiology. Caracterização Morfológica e Anatômica do Tubo Digestório de Centropomus parallelus e C. undecimalis RESUMO.Centropomus parallelus e C. undecimalis são as espécies mais comuns de Centropomidae no Brasil. Alguns autores atribuem o insucesso no seu cultivo devido ao escasso conhecimento sobre o desenvolvimento morfológico e funcional do sistema digestório, assim como o desconhecimento das exigências nutricionais das espécies. Dessa forma realizou-se o presente trabalho, com o objetivo de caracterizar histológica e histoquimicamente o tubo digestório de C. parallelus e C. undecimalis, para estudos histofisiológicos relacionados às necessidades nutricionais deste peixe. No esôfago, as células mucosas, presentes no epitélio coraram-se positivamente tanto em PAS como em AB. No estômago, as células superficiais e mucosas presentes no epitélio e na lâmina própria respectivamente, apresentaram reações positivas em PAS e negativa em AB. No intestino as células caliciformes apresentaram similaridade na proporção entre os mucos sendo positivos tanto em PAS como em AB; nos intestinos médio e distal observou-se uma maior concentração destas células, resultando em uma quantidade maior de secreções em comparação ao intestino proximal. Através dos resultados observados, concluise que o C. parallelus e C. undecimalis exibem as principais características do trato digestório de peixes carnívoros, como um estômago bem desenvolvido e um intestino relativamente curto. Estes resultados darão subsídios para futuros estudos sobre mecanismos da fisiologia digestiva e absortiva desta espécie.

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“…This assumption is also supported by the species' sub-terminal mouth (Albrecht et al, 2001), although mouth arrangement is not always a strong indicator of feeding habit for anostomids (Santos & Rosa, 1998). Sazima, (1986) also reported a case of nibbling tactic for Leporinus lacustris, which is a type of bottom feeding.…”

Section: Feeding Association Of Nuclear-following Behaviormentioning

confidence: 69%

Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

2011

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Knowledge concerning the behavior of wild freshwater fishes in Brazil is restricted to a few studies, despite such studies being able to answer fundamental questions about conservation. Species of Brycon are amongst the most threatened in the Neotropics, particularly in southeast Brazil, due to anthropogenic activities in this region. This study investigated the feeding and social behaviors of the endangered fish, Brycon devillei in the Preto River, Jequitinhonha basin, Minas Gerais State, Brazil. Behavioral data were collected by snorkeling with four spatially separated groups (habituated), and direct observations of shoals were made using an underwater video camera (a total of 448 hours of observations). This species showed diverse tactics to obtain food. However, the species proved to be predominately a specialist surface-picker, which adopted alternative tactics to find food at certain times of the year, most notably when food items on the water surface became low. Feeding frequency was shown to be negatively correlated to agonistic behavior between conspecifics. Feeding associations were also recorded between the anostomid Leporinus garmani, acting as a nuclear species, and B. devillei, as follower species. The data presented here showed the importance of conserving the riparian environment to protect B. devillei populations. Furthermore, the present study included rare observations of nuclear-follower feeding association among freshwater fishes, especially between medium-sized characiforms, being the first observations of such kind in a Cerrado stream.O conhecimento do comportamento de vida livre em peixes de água doce brasileiros é restrito a poucos estudos e pode responder a questões fundamentais de conservação. Espécies do gênero Brycon estão entre as mais ameaçadas na região neotropical, especialmente no sudeste brasileiro, em vista de diversos impactos antrópicos. O presente estudo investigou os comportamentos alimentar e social de Brycon devillei no rio Preto, bacia do Jequitinhonha, Brasil. Para tanto, utilizou-se seções de mergulhos livres para observação direta de quatro grupos habituados de B. devillei, com o auxílio de câmeras filmadoras subaquáticas. Tal espécie apresentou variadas táticas para obtenção de alimento. Entretanto, a espécie demonstrou ser um forrageador de superfície especializado que, em determinados períodos do ano, quando provavelmente a lâmina d'água torna-se uma fonte escassa de recursos, adota táticas alternativas em busca de alimentos. A frequência de forrageamento demonstrou ser negativamente correlacionada com os comportamentos agonísticos. Foram observadas associações alimentares interespecíficas envolvendo o timburé, Leporinus garmani, como espécie nuclear, e a piabanha, Brycon devillei, como sua seguidora. Os dados apresentados no presente estudo demonstram a importância de se conservar o ambiente ripário em prol da proteção das populações de B. devillei. Além disso, o presente estudo é um dos raros registros de associação alimentar do tipo nuclear-seguidor entre peixe...

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Anatomical features and histology of the digestive tract of two related neotropical omnivorous fishes (Characiformes; Anostomidae)

Cited by 94 publications

References 23 publications

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract

<b>Morphological and anatomical characterization of the digestive tract of Centropomus parallelus and <i>Centropomus undecimalis</i></b> - doi: 10.4025/actascibiolsci.v35i4.14352

Feeding and social behavior of the piabanha, Brycon devillei (Castelnau, 1855) (Characidae: Bryconinae) in the wild, with a note on following behavior

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