scholarly journals Monitoring raptors post-breeding migration on the Elba island, Arcipelago Toscano; years 2005-2006

2012 ◽  
Vol 82 (1/2) ◽  
Author(s):  
Lorenzo Vanni ◽  
Giorgio Paesani
Keyword(s):  
Breeding Migration ◽  
Elba Island

Estimating P-T metamorphic conditions on the roof of a hidden granitic pluton: an example from the Mt. Calamita promontory (Elba Island, Italy)

2018 ◽  
Vol 137 (2) ◽  
pp. 238-253 ◽  
Author(s):  
Alfredo Caggianelli ◽  
Martina Zucchi ◽  
Caterina Bianco ◽  
Andrea Brogi ◽  
Domenico Liotta
Keyword(s):  
Granitic Pluton ◽  
Elba Island

Migratory dynamics and characteristics of breeding pink salmon (Oncorhynchus gorbuscha) from the Carp River, eastern Lake Superior

1990 ◽  
Vol 68 (4) ◽  
pp. 684-693 ◽  
Author(s):  
Douglas B. Noltie
Keyword(s):  
Lake Superior ◽  
Pink Salmon ◽  
Life Cycles ◽  
Oncorhynchus Gorbuscha ◽  
Gonad Maturation ◽  
Breeding Ecology ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Light Levels ◽  
Breeding Migration ◽  
Fish Remains

The pink salmon (Oncorhynchus gorbuscha) inhabiting the Great Lakes are unique to their species, the completion of their life cycles occurring entirely in fresh water. This report describes the breeding migration and characteristics of spawners from the Carp River, an eastern Lake Superior tributary 70 km north of Sault Ste. Marie, Ontario. Movement into the stream began at dusk each evening in 1983, seemingly in response to decreasing light levels. Nightly catch numbers varied through the 1983, 1984, and 1985 runs with date, river discharge, wind-generated turbulence, and water temperatures, although the influence of these factors differed with sex and season. Spawners varied in size through the runs each year but not in the same fashion. Spawner size and condition varied yearly in apparent response to prey abundance. Gonad maturation was complete on stream entry more often in males than in females, though this difference was less pronounced further upstream or after time spent in the river. Degree of secondary sexual character development, complete on stream entry in both sexes, differed in even- and odd-year spawners in relation to condition. The recovery rates of spawned-out males and females did not differ. Tagged fish wandered from the Carp River at a rate of at least 7%, many to spawn in adjacent streams. Despite between-year differences in some parameters, much of the breeding ecology of these fish remains comparable to that of anadromous pink salmon.

Survival of foraminifera in the gut of holothuroids from Elba Island (Mediterranean Sea)

2005 ◽  
Vol 48 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Elke J. Goldbeck ◽  
Carmen Houben ◽  
Martin R. Langer
Keyword(s):  
Mediterranean Sea ◽  
Elba Island

Functional Maturity in Small Male Snow Crabs (Chionoecetes opilio)

1988 ◽  
Vol 45 (12) ◽  
pp. 2106-2109 ◽  
Author(s):  
G. P. Ennis ◽  
R. G. Hooper ◽  
D. M. Taylor
Keyword(s):  
Rapid Development ◽  
Carapace Width ◽  
Reproductive Potential ◽  
Snow Crab ◽  
Small Male ◽  
Chionoecetes Opilio ◽  
In Captivity ◽  
Breeding Migration ◽  
High Level ◽  
Snow Crabs

The mean size of male snow crabs (Chionoecetes opilio) in sexual pairs during the annual spring breeding migration to shallow water in Bonne Bay, Newfoundland, decreased from 118.6 mm carapace width (CW) in 1983 to 100.3 mm in 1987. This decrease is due to an increase in males <95 mm CW participating from 1.5% in 1983 to 32.3% in 1987. This change appears to have resulted from a reduced abundance of commercial size [Formula: see text] males due to a rapid development of an illegal fishery on this previously unfished population and, as a consequence, less competition between males for possession of females. The percentages of spermathecae containing new spermatophores for females paired with males <95 mm CW (67%) and those with males [Formula: see text] (79%) were not significantly different. We assumed that each female with new spermatophores had recently mated with the male with which it was paired. Observations on selected pairs in captivity showed that males <95 mm CW are capable of mating with both primiparous and muitiparous females. Our results indicate that small mature males can replace large males in breeding activity in a snow crab population. We conclude that in the male-only snow crab fishery in Atlantic Canada with a minimum legal size of 95 mm CW, population reproductive potential is maintained at a high level despite high exploitation rates on males [Formula: see text].

Valley Formation and Filling in Response to Neogene Magmatic Doming of Elba Island, Tuscany, Italy

2006 ◽  
pp. 327-343 ◽  
Author(s):  
VINCENZO PASCUCCI ◽  
MARTIN GIBLING ◽  
FABIO SANDRELLI
Keyword(s):  
Elba Island

scholarly journals The lawsonite-glaucophane blueschists of Elba Island (Italy)

Lithos ◽  
2019 ◽  
Vol 348-349 ◽  
pp. 105198 ◽  
Author(s):  
Caterina Bianco ◽  
Gaston Godard ◽  
Alison Halton ◽  
Andrea Brogi ◽  
Domenico Liotta ◽  
...  
Keyword(s):  
Elba Island

scholarly journals Guest or pest? Spatio-temporal occurrence and effects on soil and vegetation of the wild boar on Elba island

2020 ◽  
Author(s):  
Ilaria Greco ◽  
Ettore Fedele ◽  
Marco Salvatori ◽  
Margherita Giampaoli Rustichelli ◽  
Flavia Mercuri ◽  
...  
Keyword(s):  
Natural Habitat ◽  
Early Spring ◽  
Wild Boars ◽  
Occupancy Probability ◽  
Lower Elevation ◽  
Site Use ◽  
Temporal Occurrence ◽  
Elba Island ◽  
Spatio Temporal ◽  
One Year

AbstractWhere allochthonous large mammals, such as the wild boars, occur in high density, human-wildlife conflicts may arise. Thus, assessing their spatio-temporal patterns is paramount to their management. We studied the wild boars on Elba island, Italy, where they have been introduced and are perceived as pests to address their occurrence and impact of foraging on natural habitat. We surveyed the western island with three camera trapping surveys within one year. We found that the species' estimated occupancy probability was higher in summer-autumn (0.75 ± 0.14) and winter-early spring (0.70 ± 0.10) than in spring–summer (0.53 ± 0.15), whereas detection probability did not vary. Occupancy was significantly associated with lower elevation and woodland cover. Lower site use of wild boars during spring–summer might reflect lower food availability in this season and/or boars’ movements towards landfarms outside the sampled area. Detectability increased with proximity to roads during spring–summer and decreased with humans’ relative abundance in other periods. Boars were mainly nocturnal, with decreasing overlap with human activity when human presence was higher in the park. Soil degradation caused by wild boars was higher in pine plantations, which is the cover with a lower conservation interest. The spatio-temporal activity of wild boars on the island appears driven by seasonal preferences for food-rich cover and avoidance of human disturbance. The lowered site use in months with lower resources could partially reflect increased proximity to settled and farmed areas, which may trigger crop-raiding and the negative perception by residents.

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