<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The aim of this study was to determine the importance of different environments for Cormorant <italic>Phalacrocorax carbo</italic> biology in the Grado and Marano lagoon (Friuli Venezia Giulia, NE Italy, Upper Adriatic Sea), and to estimate the levels of fish removal within such areas. Data were collected on Cormorant abundance and the amount of fish consumed in two fishing valli (Valle Noghera and Valle Artalina) and in three tidal areas (Goppion, Cavanata sea, Grado and Marano lagoon). The number of Cormorants per 100 ha was relatively low in all the study areas. The highest density of feeding cormorants in November (24 birds/100 ha) was in Valle Noghera. The latter is ascribed to an isolated event of 50 birds in social fishing activity. During the rest of the November survey time (72% of the total), lower densities were noted (2.5 birds/100 ha). Fish consumption was also relatively low. In Valle Artalina the maximum was 6.8 kg/100 ha in December. The highest fish consumption was estimated in Valle Noghera in November (41.9 kg/100 ha) and in the Grado and Marano lagoon in January (7.6 kg/100 ha). In fish farms, the highest fish consumption is recorded in November and December, exclusively within wintering basins and canals. So these areas should be covered with wire nets. Furthermore, considering the high variability and irregularity of fish removal, the use of active deterring methods (e.g. gas cannons) can give good results, especially if applied during social fishing events.</abstract>

Interactions between fish resources and Cormorants <italic>Phalacrocorax carbo</italic> in the Grado and Marano lagoon (NE Italy)

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Prey remains found in the pellets of the White Stork <italic>Ciconia ciconia</italic> are known not to reveal the actual prey intake by the White Storks. The exceptions are the chitinous remains of insects that are quite well preserved in the pellets, and thus potentially good indicators of the actual intake of White Storks. Since insects are selected by White Storks in proportion to their abundance in the environment, they can be used as indicators of the quality of the bird foraging habitat. A preliminary test of this was carried out at three nests in NE Slovenia differing in their breeding success in 1997. In contrast to habitat analysis around the nest the proportions of Orthoptera and Coleoptera in the pellets corresponded well to the breeding success. Orthoptera species were dominant in high success, and Coleoptera (especially Carrion beetles Silphidae) in low success nests. In this paper the value of insects in White Stork pellets as indicators of the quality of the bird foraging microhabitat patches is set out. However, the indicative power of these insects needs to be tested further.</abstract>

Insects in the White Stork <italic>Ciconia ciconia</italic> diet as indicators of its feeding conditions: the first diet study in Slovenia

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The Gannet <italic>Morus bassanus</italic> is a rare vagrant species in the Black Sea region (E Bulgaria). There are altogether 9 records of Gannet in Bulgaria over the last 100 years, all on the Black Sea coast. This paper describes the three most recent records. On 29-31 July 2008 6 individuals were observed in the vicinity of St. Constantine and Elena Resort (12 km north of the town of Varna, Varna Region, NE Bulgaria). Gannets were fishing by numerous (typical) dives, accompanied by a flock of Cormorants <italic>Phalacrocorax carbo</italic> and Yellow-legged Gulls <italic>Larus michahellis</italic>. A review of all the species' records in Bulgaria, as well as the subfossil records in the Black Sea region is given.</abstract>

Status of the Gannet <italic>Morus bassanus</italic> in the Black Sea region (E Bulgaria)

Effects of meadow management practices on the breeding birds of Ljubljansko barje (central Slovenia)

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Acrocephalus

Volume 30 (2009): Issue 140 (March 2009)

Interactions between fish resources and Cormorants Phalacrocorax carbo in the Grado and Marano lagoon (NE Italy)

Insects in the White Stork Ciconia ciconia diet as indicators of its feeding conditions: the first diet study in Slovenia

Status of the Gannet Morus bassanus in the Black Sea region (E Bulgaria)

Effects of meadow management practices on the breeding birds of Ljubljansko barje (central Slovenia)

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