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1

Tiapride impairs the aversive effect of electrical stimulation of the parabrachial complex in a conditioned place task

100%
Hurtado M. M., Garcia R., Puetro A.
Acta Neurobiologiae Experimentalis
|
2014
|
tom 74
|
nr 3
The parabrachial complex has been related to various rewarding or aversive behavioral processes, including taste aversion learning and conditioned place aversion. This study examined the effect of tiapride, an antagonist of D2/D3 dopaminergic receptors, on place aversion induced by electrical stimulation of the external lateral parabrachial (LPBe) nucleus. Results obtained show that brain-stimulated animals avoid the area of the maze associated with electrical stimulation but show no such behavioral rejection when they receive an injection of 30 mg/kg tiapride. Furthermore, tiapride did not appear to affect the horizontal motor activity (crossing) of the animals. These results are discussed in the context of the different natural and artificial modalities used to induce aversive behavior and their relationship with dopamine systems.
2

Tiapride prevents the aversive but not the rewarding effect induced by parabrachial electrical stimulation in a place preference task

100%
Hurtado M. M., Garcia R., Puerto A.
Acta Neurobiologiae Experimentalis
|
2017
|
tom 77
|
nr 3
The parabrachial complex has been related to the processing of both rewarding and aversive signals. This pontine area is activated after the gastrointestinal administration of rewarding nutrients, in taste aversion learning, and in response to the reinforcing and aversive effects of some drugs of abuse. Electrical stimulation of this region can induce, in different animals, preference or aversion behaviors towards a place in a rectangular three‑chamber maze task. This study examined the effect of tiapride, a D2/D3 receptor antagonist, on the aversive or rewarding effects induced by electrical stimulation of the external lateral parabrachial subnucleus (NLPBe). As previously observed, administration of tiapride interrupted the aversive effect induced by NLPBe electrical stimulation. However, in contrast to the effects of dopamine antagonists on other rewarding systems, tiapride did not impair the place preference induced by NLPBe stimulation, an activation effect that is subject to tolerance. Tiapride administration also appeared to have no effect on the horizontal motor activity (crossings) of the electrically stimulated animals. We discuss the specific relevance of parabrachial reward with respect to other reinforcing brain components or systems, especially in relation to the preference effect of drugs of abuse, such as opiates, after dopamine antagonist administration.
3

Feeding ecology of feral cats on a heterogeneous subtropical oceanic island [La Palma, Canarian Archipelago]

100%
Medina F. M., Garcia R., Nogales M.
Acta Theriologica
|
2006
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tom 51
|
nr 1
75-83
We found a total of 987 prey in the 500 scats of feral catsFelis silvestris catus Linnaeus, 1758 analyzed in the present study. Introduced mammals (rabbits, rats and mice) constituted the most important prey both in percentage and biomass. Reptiles were the second most important prey, being more frequent than birds and invertebrates. Mammals were the most frequently eaten group in all five main habitats of the island, being more frequent than the remainder of prey in the laurel forest. Rabbits appeared more often in the temperate forest, rats in the laurel forest and mice in the high mountain. Birds were more frequently captured in the three higher habitats (laurel and pine forest, and high mountain) than in the two lower ones (xerophytic shrub and temperate forest). Reptiles were preyed on less in the laurel forest than in the other main habitats. Morisita index indicates a high trophic overlap among the different habitats with the exception of the laurel forest which shows important differences from the other habitats. Levin’s niche-breadth was broader in the xerophytic shrub and narrower in the temperate forest, reaching intermediate levels in the other three main habitats. The results obtained in the present study evidence a general pattern in the trophic ecology among similar habitats in the different subtropical Canarian islands. However, some important differences exist that could be a function of the differential prey availability and composition in each ecosystem.
4

Composition and in vitro digestibility of leaves and stems of grasses and legumes harvested from permanent mountain meadows at different stages of maturity

88%
Ammar H., Lopez S., Bochi-Brum O., Garcia R., Ranilla M. J.
Journal of Animal and Feed Sciences
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1999
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tom 08
|
nr 4
599-610
5

Trophic habits of feral cats in the high mountain shrublands of the Macaronesian islands [NW Africa, Atlantic Ocean]

76%
Medina F. M., Oliveira P., Menezes D., Teixeira S., Garcia R., Nogales M.
Acta Theriologica
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2010
|
tom 55
|
nr 3
241-250
Feral cats Felis catus Linnaeus, 1758 have contributed to the extinction of numerous native species on islands, which are clearly sources of global biodiversity. We studied the diet of this introduced predator in the Madeira and Cape Verde archipelagos, which harbour important colonies of endangered seabirds in the high mountain habitats, and compared the results with those obtained in the same habitat in the Canary Islands, Macaronesian archipelago. On Madeira, 461 prey were identified from 143 scat groups. Mammals, overall mice, constituted the basic diet appearing in 95% of cat scats. On Fogo (Cape Verde), 657 prey items were obtained from 145 scats, and mammals were also the most important prey, reaching a frequency of occurrence of 88%. Although introduced mammals were the main prey category on all Macaronesian islands, we observed variation in feral cat diet among these islands. Birds were more frequently consumed on Madeira, lizards on Tenerife (Canaries) and invertebrates on Fogo. No specific differences were observed in relation to La Palma. We suggest that the diet composition on these islands varies according to the respective availability of the different prey types.
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