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Population parameters and reproductive biology of the Iberian hare Lepus granatensis in Southern Iberia

100%

Farfan M. A., Vargas J. M., Real R., Palomo L. J., Duarte J.

Acta Theriologica

2004

tom 49

nr 3

To analyse the population structure and reproductive biology of the Iberian hare Lepus granatensis Rosenhauer, 1856, 498 hares (264 males and 234 females) were collected in monthly samples from October 1998 to September 1999. Females reached larger sizes than males, with approximately 400 g difference in body mass on reaching sexual maturity. The total sex ratio was 1:1, with a bias in favour of males in winter. Sexually active males and females appeared in every month but August, when no sexually active female was found. Births occurred in every month and were more frequent between March and July. Seasonal variation in kidney fat index (KFI) followed a similar pattern in males and females, with an increase in mid-autumn and a decline at the end of winter. Reproductive activity appeared in every month, with a maximum from February to June. Reproductively hyperactive females (simultaneously pregnant and nursing) appeared in every month except in January, with a first peak in March and a second lower peak in May-June. Litter size fluctuated between 1 and 7 leverets. The most frequent gestations involved 1 or 2 foetuses. The mean annual litter size was 2.08 and the average number of litters per productive female per year was estimated to be 3.48. The maximum productivity was recorded between March and May. The total annual production of young per adult female was estimated to be 7.21. The minimum annual survival rate of young was 27.91%. On the basis of these results we propose to maintain the limit of the hunting period between October and December. We discuss the relationship between the low young/adult ratio obtained and the hunting method used.

Heavy flooding effects on home range and habitat selection of free-ranging Iberian hares (Lepus granatensis) in Doñana National Park (SW Spain)

72%

Carro F., Soriguer R. C., Beltran J. F., Andreu A. C.

Acta Theriologica

2011

tom 56

nr 4

The Iberian hare Lepus granatensis is a common and abundant species throughout the Iberian Peninsula; however, studies documenting its ecology are scarce. Between August 1996 and September 1997, after a long drought, we studied the effects of a widespread flood on the Iberian hare ecology in ecotone pastures of Doñana National Park. Hares were captured using vertical nets through part of 1996 and 1997. Fourteen adult hares (nine females and five males) were tagged with radiocollars and located by triangulation on a daily basis at least once a week. Habitat use was estimated using a geographical information system. The average home range size was 28 ha for males and 24 ha for females. No significant differences were observed between sexes. Significant differences were observed in the use of scrub areas and in dry pastures. During the dry and wet seasons, males and females were most often located in the pastures of the ecotone, rush stands and scrub. The dense bracken (Pteridium aquilinum) and seaside bulrush (Scirpus maritimus) communities were avoided. These results are the first on the spatial ecology of this species in its native habitat.

Modelling habitat use by Iberian hare Lepus granatensis and European wild rabbit Oryctolagus cuniculus in a mountainous area in northwestern Spain

72%

Tapia L., Dominguez J., Rodriguez L.

Acta Theriologica

2010

tom 55

nr 1

73-79

We developed broad-scale habitat use models for the distribution of the Iberian hare Lepus granatensis Rosenhaeur, 1856 and the relative abundance of the European wild rabbit Oryctolagus cuniculus (Linnaeus, 1758) in a mountainous area in north-western Spain, the Baixa Limia Site of Community Importance (SCI). For the Iberian hare, the most parsimonious model included average altitude, average slope, scrub-pasture area and length of border between scrublands and forests. Four variables were consequential, 2 of them with a positive sign for the presence of the hare (average altitude and scrubland area) and 2 with a negative one (average slope and length of border between scrubland and forest). For the European wild rabbit the most parsimonious General Linear model obtained included average altitude and scrub-forest edge. Only 2 predictors were consequential, both with a negative sign on the relative abundance of wild rabbits: the average altitude and length of border between scrubland and forest. The models obtained indicated the need of management actions to favour open habitats with suitable vegetation structure, avoiding extensive reforestation. A revision of the current hunting plans in the protected area of Baixa Limia is required.

Ograniczanie wyników

3 Acta Theriologica

1 Andreu A. C.

1 Beltran J. F.

1 Carro F.

1 Dominguez J.

1 Duarte J.

1 Farfan M. A.

1 Palomo L. J.

1 Real R.

1 Rodriguez L.

1 Soriguer R. C.

1 Tapia L.

1 Vargas J. M.

1 2011

1 2010

1 2004

Wyniki wyszukiwania

Population parameters and reproductive biology of the Iberian hare Lepus granatensis in Southern Iberia

Heavy flooding effects on home range and habitat selection of free-ranging Iberian hares (Lepus granatensis) in Doñana National Park (SW Spain)

Modelling habitat use by Iberian hare Lepus granatensis and European wild rabbit Oryctolagus cuniculus in a mountainous area in northwestern Spain