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First evaluation of different captive rearing techniques for the re-establishment of the red legged partridge populations
No full textIn Tuscany, the red-legged partridge (Alectoris rufa) became extinct at the beginning of the 20th century. Recently, some attempts have been made to re-establish wild populations in Tuscany using farm reared birds, but in most cases the released populations have shown difficulties in reaching sufficient viability, even in areas where the habitat can be considered suitable. Modern technologies for rearing game-birds may be not suitable for reintroduction purposes. For this reason we carried out preliminary research to evaluate the survival of red legged partridges reared under natural condition (Natural) compared to those farm reared (Artificial). Natural rearing occurred in a large pen where birds were allowed to mate freely and to nest. Natural reared birds reached a larger size than artificially-reared birds. Partridges were released in a 7.56 sq km protected area located in the province of Leghorn (western Tuscany, Italy). We followed the fate of 22 young radio-tagged red-legged female partridges (half Natural and half Artificial) and 56 young red-legged partridges (25 Artificial and 31 Natural) marked with different coloured ponchos. The survival of Natural radio-tagged red-legged partridges was double that of the Artificial red-legged partridges. After six months, the re-sighting rate of the Natural poncho-marked birds reached 22.6% whereas none of the Artificial stock was re-sighted. The preliminary results of this research suggest that Natural rearing may be an important tool to improve the success of partridge reintroduction
Corn appetibility reduction in wild boar (Sus scrofa L.) in relationship to the use of commercial repellente
No full textCova diretta di pernici rosse (Alectoria rufa L.) accasate in voliere a terra
No full textThe repopulations carried out with captive raised red-legged partridges don’t seem to
conduct to satisfactory results. Currently, the partridges present to the free state in different
Tuscany areas (obtained from captivity raised animals) are not yet able to reconstitute self
sustaining wild populations. The presence of hybrids with non indigenous partridges (E.G.A.
chukar) and the genetic/behavioural alterations, due to the traditional breeding, are presumably
the principal causes of the insufficient quality of the reintroduced animals.
For these reason we wanted to test the reproduction ability of the genetically pure red-legged
partridges in controlled aviaries with the aim to produce partridges more fitted for wildlife
release. 14 couples of red partridges, certified genetically not hybridized with A. chukar by theNational Institute for Wild Fauna, were used for the test. Only 6 couples brooded the laid eggs
and only 3 couples of them completed the brooding, with the birth of 17 partridges in total. The
study therefore has underlined the necessity to use the direct brooding for the selection of the
reproducers of the game farms, with the aim to improve the natural reproductive ability of the
captive raised animals
Habitat use and home range traits of resident and relocated hares (Lepus europaeus, Pallas)
No full textThe aim of the study was to know the habitat preferences and home range of resident and relocated brown hares during the no hunting period.
The trial was carried out in a protected area (PA) and in a free hunting territory (FHT), both located in Florence province. During captures 21 hares were equipped with a necklace radio tag: 7 hares, resident group, were released in the same area of capture and 14 hares, relocated group, were relocated in six different locations within the FHT. The effect of place of release was analyzed by ANOVA and/or non parametric methods.
Results showed that the home ranges of the resident group were characterised by a greater presence of fallow land and shrub land than relocated group (P< 0.05). Home range sizes and Max distances from the releasing sites were greater in the relocated group. Resident hares preferred landscape characterized by a higher density of patches (152 vs. 70 n/100ha), patch richness (43 vs. 12 n/100ha), and patches area (4703 vs. 8142 sq.m) than the relocated hares (P<0.01). The landscape structure indexes, the home range sizes and the maximum distance from the releasing sites suggest that the relocated hares even if released in suited habitats, will move from their releasing point to look for better habitats. Landscape with most complexity are preferred from the resident hare, and this result should be consider when a project to reintroduction of this lagomorph in a territory is programmed, or when it is necessary to improve the dynamic of a natural population
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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