Sono stati studiati i contenuti stomacali di 39 Gazze (Pica pica) della bassa e mediacollina pavese per conoscere l’alimentazione insettivora della specie tra l’auttlnno e l’inizio della primavera. On the insectivo...Sono stati studiati i contenuti stomacali di 39 Gazze (Pica pica) della bassa e mediacollina pavese per conoscere l’alimentazione insettivora della specie tra l’auttlnno e l’inizio della primavera. On the insectivorous feeding of Magpie Pica pica. 39 stomachal contents of Magpies (Picapica), from low and middle altitude hills near Pavia, have been analyzed to understand the insectivorousfeeding of the species between autumn and the beginning of spring.展开更多
Ponyfishes of the family Leiognathidae frequently show overlapping distribution pattems in the Indo-Pacific and South China Sea. The mouth morphology of three species of ponyfishes which feed at different lerels in th...Ponyfishes of the family Leiognathidae frequently show overlapping distribution pattems in the Indo-Pacific and South China Sea. The mouth morphology of three species of ponyfishes which feed at different lerels in the water column were compared. The species could be distinguished primarily by the mouth meropology. Gazza minuta (Bloch)feeds mainly on bethos, has the least protruding jaws; Secutor ruconius (Hamilton-Buchanan) feeds mainly on plankton, has the most protruding jaws, Leiognathus rivuatus (Temmink et Schlegel) has an intermediate deggree of jaw protrusion. This study showed that closely related species with overlapping distributions frequently exhibit morphologlcal, phpsiological or ecological differences related to the search for food, the intake of food or locomotion mode.展开更多
文摘Sono stati studiati i contenuti stomacali di 39 Gazze (Pica pica) della bassa e mediacollina pavese per conoscere l’alimentazione insettivora della specie tra l’auttlnno e l’inizio della primavera. On the insectivorous feeding of Magpie Pica pica. 39 stomachal contents of Magpies (Picapica), from low and middle altitude hills near Pavia, have been analyzed to understand the insectivorousfeeding of the species between autumn and the beginning of spring.
文摘Ponyfishes of the family Leiognathidae frequently show overlapping distribution pattems in the Indo-Pacific and South China Sea. The mouth morphology of three species of ponyfishes which feed at different lerels in the water column were compared. The species could be distinguished primarily by the mouth meropology. Gazza minuta (Bloch)feeds mainly on bethos, has the least protruding jaws; Secutor ruconius (Hamilton-Buchanan) feeds mainly on plankton, has the most protruding jaws, Leiognathus rivuatus (Temmink et Schlegel) has an intermediate deggree of jaw protrusion. This study showed that closely related species with overlapping distributions frequently exhibit morphologlcal, phpsiological or ecological differences related to the search for food, the intake of food or locomotion mode.
