Gastric function in Caiman crocodilus (Crocodylia: Reptilia)—II. Effects of temperature on pH and proteolysis

Diefenbach, Carlos O. da C.

doi:10.1016/0300-9629(75)90370-9

Cited by 28 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, falconiform pellets contain little to no bone and have a pH less than two [37]. Reports of gastric pH in crocodilians vary from 1.2 to 3 [38,39]. Although gastric pH overlaps with that of raptorial birds, some of which as mentioned also completely digest bone [36,37], the longer GRT in crocodilians [32] is probably due to their more limited gastric motility compared to birds, in which digestion is facilitated by more efficiently mixing foodstuffs with gastric juices [29,37].…”

Section: Discussionmentioning

confidence: 91%

Microraptor with Ingested Lizard Suggests Non-specialized Digestive Function

et al. 2019

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 91%

Microraptor with Ingested Lizard Suggests Non-specialized Digestive Function

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Prey size is limited primarily by gape size, and consequently, crocodilians are capable of ingesting relatively large items (Cleuren & De Vree, ). Given the mechanics of ingestion, most fruits are probably intact upon entering the stomach, and then rapidly digested in the highly acidic (pH = 1.2 to 2.0) gastric environment (Diefenbach, 1975 b ; Coulson, Herbert & Coulson, ) leaving only the seeds. While fate of seeds in the digestive system has not been specifically investigated, inferences can be made based on other hard objects ingested by crocodilians.…”

Section: The Fate Of Fruits and Seeds Ingested By Crocodiliansmentioning

confidence: 99%

“…Gastric residence time for ingested items is highly variable and depends on temperature, meal size, food consumption rate and composition of the food (Diefenbach, 1975 b ; McWilliams, Afik & Secor, ; Janes & Gutzke, ). Most items remain in the stomach for 24 to 45 h and pass through the entire digestive tract in 4–5 days (Davenport et al ., ), a gut passage rate comparable to many birds and larger mammals (Willson, ).…”

Section: The Fate Of Fruits and Seeds Ingested By Crocodiliansmentioning

confidence: 99%

Frugivory and seed dispersal by crocodilians: an overlooked form of saurochory?

et al. 2013

View full text Add to dashboard Cite

Saurochory (seed dispersal by reptiles) among crocodilians has largely been ignored, probably because these reptiles are generally assumed to be obligate carnivores incapable of digesting vegetable proteins and polysaccharides. Herein we review the literature on crocodilian diet, foraging ecology, digestive physiology and movement patterns, and provide additional empirical data from recent dietary studies of Alligator mississippiensis. We found evidence of frugivory in 13 of 18 (72.2%) species for which dietary information was available, indicating this behavior is widespread among the Crocodylia. Thirty‐four families and 46 genera of plants were consumed by crocodilians. Fruit types consumed by crocodilians varied widely; over half (52.1%) were fleshy fruits. Some fruits are consumed as gastroliths or ingested incidental to prey capture; however, there is little doubt that on occasion, fruit is deliberately consumed, often in large quantities. Sensory cues involved in crocodilian frugivory are poorly understood, although airborne and waterborne cues as well as surface disturbances seem important. Crocodilians likely accrue nutritional benefits from frugivory and there are no a priori reasons to assume otherwise. Ingested seeds are regurgitated, retained in the stomach for indefinite and often lengthy periods, or passed through the digestive tract and excreted in feces. Chemical and mechanical scarification of seeds probably occurs in the stomach, but what effects these processes have on seed viability remain unknown. Because crocodilians have large territories and undertake lengthy movements, seeds are likely transported well beyond the parent plant before being voided. Little is known about the ultimate fate of seeds ingested by crocodilians; however, deposition sites could prove suitable for seed germination. Although there is no evidence for a crocodilian‐specific dispersal syndrome similar to that described for other reptiles, our review strongly suggests that crocodilians function as effective agents of seed dispersal. Crocodilian saurochory offers a fertile ground for future research.

show abstract

“…Na Venezuela, foi observado que os c. intermedius não se alimentam na faixa de temperatura de 21 a 21,9°C (RAMOS et ai., 1992). Já Caiman crocodylus com 35,5 a 38,5cm de comprimento se alimentam até 15°C, e aqueles com comprimento entre 56 a 96cm, se aliment,am até 20°C (DIEFENBACH, 1975b). Quando a temperatura da água se mantém entre 14 e 16°C por um periodo de 3 a 5 dias, os JPA passam a regurgitar o alimento sem sinais de putrefação (DIEFENBACH, 1981;1988 HERNANDEZ, 1983).…”

Section: Efeito Da Temperatura Na A1~entaçãounclassified

“…DIEFENBACH (1975a), estudando a relação da temperatura com a motilidade gástrica, observou que esta é drasticamente reduzida a 20°C, e mais ainda a 15°C. Paralelo à redução da motilidade gástrica, tem-se uma diminuição na concentração estomacal do ácido clorldrico, reduzindo a atividade proteolitica (DIEFENBACH 1975b). COULSON & HERNANDEZ(1983) , observaram que a temperatura tem efeito marcante na dinâmica da digestão e na assimilação de nutrientes.…”

Section: Efeito Da Temperatura Na A1~entaçãounclassified

Efeito da temperatura no desenvolvimento de filhotes de jacare-de-papo-amarelo, >i<Caiman latirostris>/i< (Daudin, 1802) em cativeiro

Vianna¹

View full text Add to dashboard Cite

Aos meus pais, Roberto e Maria Ignês, pelo amor, carinho e estímulo durante todos estes anos. A minha avó, Universina, pelo exemplo de vida. As minhas irmãs babei e Cláudia Inês, a querida sobrinha Roberta e ao Felipe, pela força, amor e amizade. Aos meus dois amigos BiU e Charles (in memoriam), que sejam duas estrelinhas de luz, onde quer que vocês estejam. Dedico AGRADECIMENTOS Ao prof. Abel Lavorenti, pela confiança e orientação. Ao Eng.Agrónomo MS. Luciano M. Verdade, pela ajuda na confecção inicial do trabalho e amizade. Aos professores José Eurico P. cyrino, Augusto s. Abe e Dalton José carneiro, pela colaboração no trabalho. Ao prof. Dr. Humberto I. Packer, ao MS Luiz Maria Salvarrey e MS José Erivaldo Pereira, pelo auxilio estatistico. Ao João Ricardo Alves Pereira, pelas valiosas discussões técnicas durante o trabalho, pela dedicação e companheirismo durante a coleta de dados, e principalmente pela imprescindivel força, amizade e amor. Aos estagiários Fabiana sarkis e Alexandre Gonçalves, pelo empenho durante a coleta de dados. Aos funcionários Edison R. Davanzo, Creide Martins e todos que ajudaram durante este periodo. Ao coordenador do curso de pós-graduação prof. Waldomiro Myada pela ajuda de custo na infraestrutura do experimento. A Supremais e a Guabi Mogiana Alimentos S .A. pela doação do premix e da ração. A Ana Ri ta Nogueira da EMBRAPA de São Carlos pelas análises de cálcio e fósforo e M.S. ao Sérgio Nogueira pela força. Ao Conselho Nacional de Desenvolvimento Cientifico e Tecnológico (CNPq), pela concessão da bolsa de mestrado. Aos companheiros de turma, em

show abstract

Gastric function in Caiman crocodilus (Crocodylia: Reptilia)—II. Effects of temperature on pH and proteolysis

Cited by 28 publications

References 18 publications

Microraptor with Ingested Lizard Suggests Non-specialized Digestive Function

Microraptor with Ingested Lizard Suggests Non-specialized Digestive Function

Frugivory and seed dispersal by crocodilians: an overlooked form of saurochory?

Efeito da temperatura no desenvolvimento de filhotes de jacare-de-papo-amarelo, >i<Caiman latirostris>/i< (Daudin, 1802) em cativeiro

Contact Info

Product

Resources

About