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Funding from the Spanish Ministry of Economy and Competitiveness (Project AGL2011-22628) and the Comunidad Autonoma de Madrid (CAM; Project MEDGAN ABI-2913) is gratefully acknowledged.

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Carabano, R.AuthorGarcía, J.AuthorCarro, M. D.Corresponding Author

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INFLUENCE OF INOCULUM TYPE (ILEAL, CAECAL AND FAECAL) ON THE IN VITRO FERMENTATION OF DIFFERENT SOURCES OF CARBOHYDRATES IN RABBITS

Publicated to:World Rabbit Science. 26 (3): 227-240 - 2018-01-01 26(3), DOI: 10.4995/wrs.2018.9726

Authors: Abad-Guaman, R.; Larrea-Davalos, J. A.; Carabano, R.; Garcia, J.; Carro, M. D.;

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Abstract

Two in vitro experiments were performed to analyse the fermentative potential of ileal content, caecal content, soft faeces and hard faeces from adult rabbits. Experiment 1 evaluated 3 doses (0.5, 1.0 and 2.0 g fresh digesta/g substrate dry matter [DM]) of ileal and caecal digesta as inoculum in 28 h-incubations. Two ileal and 2 caecal inocula were obtained, each by pooling the ileal or caecal digesta of 2 adult rabbits. Pectin from sugar beet pulp (SBP) and the insoluble residue obtained after a 2-step in vitro pre-digestion of SBP and wheat straw were used as substrates. The 0.5 dose produced the lowest (P<0.05) amount of gas at 28 h, with no differences (P>0.05) between the 1.0 and 2.0 doses (44.9, 51.6 and 53.8 mL/g substrate DM, respectively; values averaged across inocula and substrates). Experiment 2 evaluated two doses of ileal inoculum (1 and 1.5 g fresh digesta/g substrate DM) and compared ileal digesta, caecal digesta, soft faeces and hard faeces as inoculum for determining in vitro gas production (144-h incubations) of the 3 substrates used in Experiment 1 and wheat starch. Three inocula of each type were obtained, each by pooling either digesta or faeces from 3 rabbits. There were no differences (P>0.05) between the 2 ileal doses tested in gas production parameters, and therefore the 1.0 dose was selected for further ileal fermentations. Starch and pectin showed similar (P>0.05) values of gas production rate and maximal gas production rate when they were fermented with caecal digesta (0.038 vs. 0.043%/h, and 13.7 vs. 15.2 mL/h, respectively), soft (0.022 vs. 0.031%/h, and 9.97 vs. 9.33 mL/h) and hard faeces (0.031 vs. 0.038%/h, and 13.6 vs. 10.8 mL/h), and values were higher than those for SBP and wheat straw; in contrast, values for starch and pectin differed with the ileal inoculum (0.046 vs. 0.024%/h, and 18.4 vs. 6.60 mL/h). Both ilea! and caecal gas production parameters were well correlated with those for hard and soft faeces inocula, respectively (r >= 0.77; P <= 0.040). The ileal inoculum showed a relevant fermentative potential, but lower than that of caecal digesta and soft and hard faeces for all substrates except wheat starch.

Keywords

Beet pulpDigestibilityDigestive-tractGas productionGas-production techniqueGrowing rabbitsHard fecesIn vitroKineticsNeutral detergent fiberNonstarch polysaccharidesPectinRabbitSoluble fiberStarchSugar beet pulpWheat straw

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal World Rabbit Science due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2018, it was in position , thus managing to position itself as a Q2 (Segundo Cuartil), in the category Animal Science and Zoology. Notably, the journal is positioned en el Cuartil Q4 for the agency WoS (JCR) in the category Agriculture, Dairy & Animal Science.

Independientemente del impacto esperado determinado por el canal de difusión, es importante destacar el impacto real observado de la propia aportación.

Según las diferentes agencias de indexación, el número de citas acumuladas por esta publicación hasta la fecha 2025-06-01:

  • WoS: 3
  • Scopus: 6
  • OpenCitations: 3

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-06-01:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 3.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 3 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 0.25.
  • The number of mentions on the social network X (formerly Twitter): 1 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Additionally, the work has been submitted to a journal classified as Diamond in relation to this type of editorial policy.

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Ecuador.

There is a significant leadership presence as some of the institution’s authors appear as the first or last signer, detailed as follows: First Author (Abad-Guaman, R.) and Last Author (CARRO TRAVIESO, MARIA DOLORES).

the author responsible for correspondence tasks has been CARRO TRAVIESO, MARIA DOLORES.