Diet Selection by Sheep and Goats on Mediterranean Heath-Woodland Range

Bartolomé, Jordi; Franch, J.; Plaixats, J.; Seligman, N. G.

doi:10.2307/4003322

Cited by 89 publications

(68 citation statements)

References 32 publications

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“…The benefit of growing completely protected by shrubs has been shown in the same study area for both other less-palatable tree species, such as Taxus baccata (García et al 2000), as well as for highly palatable species, such as Acer granatense (Hódar et al 1998;Castro 2000). The trophic generalism of the domestic and wild Mediterranean ungulates (e.g., Martínez 1995;García-González and Cuartas 1992b;Fandós 1991;Bartolomé et al 1998 our study sites seem not to benefit from any deterrent property of neighbouring shrubs other than mechanical barriers against the ungulates.…”

Section: Discussionmentioning

confidence: 64%

“…In addition, mammalian herbivory is extremely frequent in Mediterranean habitats, most being overgrazed and overbrowsed . Finally, the Mediterranean mammalian herbivores are generalists, consuming disparate types of herbs and shrubs (Martínez 1988(Martínez , 1990(Martínez , 1995García-González and Cuartas 1989, 1992a, 1992bFandós 1991;Cuartas and García-González 1992), often resulting in serious damage to Mediterranean woody plants (Cuartas and García-González 1992;Bartolomé et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Gómez¹,

Hódar²,

Zamora³

et al. 2001

Can. J. Bot.

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Abstract:The spatial structure of plant communities as well as the quality and abundance of neighbours can strongly influence the intensity of herbivory suffered by a plant. In this paper, we study the effect of the association with shrubs on the ungulate herbivory suffered by Scots pine (Pinus sylvestris var. nevadensis Christ., Pinaceae) saplings in two isolated, fragmented populations in southeastern Spain. For this, we monitored herbivory on saplings with regard to the microhabitat in which they grew. We distinguished pines growing in open interspaces, on the edge of shrubs and within the canopy of shrubs, and also we distinguished four functional types of shrubs: thorny shrubs, nonthorny shrubs, thorny scrubs, and nonthorny scrubs. Our results show that association with shrubs increases the damage inflicted on Scots pine saplings. In fact, saplings growing in the open patches, far from the shrubs, escaped from herbivory more frequently and incurred less damage than did saplings growing close to shrubs. However, herbivory was also reduced when pine saplings were completely surrounded by shrubs, since then they served as a mechanical barrier. The type of neighbouring shrub did not affect the overall damage suffered by pines, despite the fact that the ungulates damaged the nonthorny scrubs more intensely than the other kinds of shrubs. Consequently, saplings have an advantage when growing within the canopy of shrubs; these constitute key microsites for pine recruitment in these Mediterranean forests.Key words: associational resistance, associational susceptibility, mammalian herbivory, Mediterranean high mountain, neighbouring effects, Pinus sylvestris var. nevadensis.Résumé : La structure spatiale des communautés végétales ainsi que la qualité et l'abondance des voisins peuvent fortement influencer l'intensité de l'herbivorie subie par les plantes. Les auteurs ont étudié l'effet de l'association avec des arbustes sur l'herbivorie subie de la part des ongulés par de jeunes plants de pin sylvestre (Pinus sylvestris var. -nevadensis Christ., Pinaceae) dans deux populations isolées et fragmentées du sud-est de l'Espagne. A cette fin, ils ont suivi l'herbivorie chez les jeunes plants en relation avec le microhabitat où ils poussent. Ils ont distingué les pins poussant dans les espaces ouverts, près d'arbustes et sous la canopée des arbustes, et ont également identifié 4 types fonctionnels d'arbustes : arbustes épineux, arbustes non-épineux, rebuts (scrubs) épineux, rebuts non-épineux. On observe que l'association avec les arbustes augmente le dommage subi par les jeunes plants de pin sylvestre. En fait, les jeunes plants poussant dans les espaces ouverts, loin des arbustes, échappent à l'herbivorie plus souvent et subissent moins de dommages que les jeunes plants poussant près des arbustes. Cependant, l'herbivorie est également réduite lorsque les jeunes plants de pin sont complètement entourés d'arbustes, qui servent alors de barrière mécanique. Le type d'arbuste avoisinant n'affecte pas les dommages en général s...

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Section: Discussionmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Gómez¹,

Hódar²,

Zamora³

et al. 2001

Can. J. Bot.

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“…According to Wadhwa et al (2006), cabbage leaves have excellent palatability when fed to goats. The ingestive behaviour of goats, however, differs from that of sheep (Nicol et al, 1987;Bartolome et al, 1998). The ADG of lambs fed the diets containing cabbage was lower (P <0.05) compared with lambs fed the control diet (Table 4).…”

Section: Resultsmentioning

confidence: 96%

“…Although Wadhwa et al (2006) reported good animal performance when cabbage was fed to goats, the performance of young lambs fed diets supplemented with cabbage might differ from that of goats because these small ruminants differ in their grazing behaviour and digestive dynamics (Nicol et al, 1987;Bartolome et al, 1998). In addition, the goats used by Wadhwa et al (2006) were six years old and weighed 62 kg live weight, while sheep feedlot operations in South Africa use weaned lambs that range between 22 and 26 kg live weight.…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary inclusion of discarded cabbage (<i>Brassica oleracea</i> var. <i>capitata</i>) on the growth performance of South African Dorper lambs

Nkosi¹,

Meeske²,

Ratsaka³

et al. 2016

SA J. An. Sci.

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A study was conducted to determine the effect of dietary inclusion of discarded cabbage (DC) on the intake and growth performance of lambs. Diets containing 0 (control, DC0), 100 g DC/kg (DC100), 150 g DC/kg (DC150) and 200 g DC/kg (DC200) were fed ad libitum to 36 South African Dorper lambs (22.0 ± 1.3 kg live weight). The dry matter intake (DMI) and lamb growth performance was reduced as the level of cabbage in the diet increased. The feed conversion rate of lambs was negatively affected by inclusion of cabbage in the diet. Diets containing cabbage had a lower DM, OM and aNDF digestibility compared with the control. Nitrogen intake and retention was lower in lambs fed diets containing cabbage. Discarded cabbage can be included in finishing diets for lambs but reduced animal performance can be expected.

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“…While this representation highlights the predominance of browse in the diet of goats, a finding reported by many authors (e.g. Squires 1980;Teague 1989;Bartolome et al 1998;Ramirez 1999), the literature also reflects considerable variation on this theme and points to goats as highly selective, or 'fastidious', grazers while willing to accept a wide variety of forages (Devendra and Burns 1983).…”

mentioning

confidence: 71%

Incorporating farmed goats into sustainable rangeland grazing systems in southern Australia: a review

Hacker

Alemseged

2014

Rangel. J.

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Abstract. The recent trend to farming or re-domestication of feral goats poses serious questions for the ecological sustainability of the semiarid and arid rangelands of southern Australia. This paper reviews aspects of the biology and grazing habits of goats, and aspects of the Australian goat industry, relevant to their sustainable management in livestock enterprises. Key factors identified include high fertility and fecundity even under low seasonal rainfall conditions and a generalist feeding strategy. Adverse consequences for rangeland condition can be expected if seasonal or market conditions result in an imbalance between population growth and turnoff, resulting in high grazing pressures. Given the limited control of the reproductive process at the current stage of the development of goat farming, strategies aimed at ensuring continuity of sale of goats (e.g. on-property feed lots or supply chain and market development) will be important in ensuring that imbalances are avoided. Conservative stocking rates and use of seasonal risk management tools are also particularly relevant. The major research and development needs identified by this review, from a resource management perspective, concern the appropriate dry sheep equivalent rating for goat classes based on age, sex and reproductive status, the extent and consequences of heterogeneity of grazing in space, time, and across forage species, and development of means of establishing sustainable stocking rates based on the use of all available forage sources, including browse.

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Diet Selection by Sheep and Goats on Mediterranean Heath-Woodland Range

Cited by 89 publications

References 32 publications

Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Ungulate damage on Scots pines in Mediterranean environments: effects of association with shrubs

Effects of dietary inclusion of discarded cabbage (<i>Brassica oleracea</i> var. <i>capitata</i>) on the growth performance of South African Dorper lambs

Incorporating farmed goats into sustainable rangeland grazing systems in southern Australia: a review

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