Ecology of a Speleomantes ambrosii population inhabiting an artificial tunnel

1994 ◽  
Vol 15 (1) ◽  
pp. 35-45 ◽  
Author(s):  
Federico Melodia ◽  
Sebastiano Salvidio ◽  
Maria Tavano ◽  
Mauro Valerio Pastorino ◽  
Aldo Lattes
Keyword(s):  
Spatial Distribution ◽  
Home Range ◽  
Food Item ◽  
Food Abundance ◽  
Main Food ◽  
Juvenile Recruitment ◽  
Microhabitat Heterogeneity ◽  
Nw Italy ◽  
Main Food Item

AbstractA Speleomantes ambrosii population living in an artificial tunnel in NW Italy was studied for two consecutive years. Activity on the walls varied cyclically in relation to seasonal temperatures and food abundance. The main food item was the trogloxenic dipteran Limonia nubeculosa, which accounted for more than 80% of the total ingested prey by volume. Juvenile cave salamanders had a broader trophic nich than adults. Oviposition and juvenile recruitment appeared to be seasonal. The spatial distribution inside the tunnel was related to microhabitat heterogeneity and particularly to the distance from the entrance. Juveniles were observed outside or close to the entrance more often than adults. Movement of adult salamanders were generally low and averaged 7 cm/day; some repeatedly recaptured individuals had a mean home range of 6 m2.

scholarly journals Cannibalism as the main feeding behaviour of tucunares introduced in Southeast Brazil

2004 ◽  
Vol 64 (3b) ◽  
pp. 625-632 ◽  
Author(s):  
L. M. Gomiero ◽  
F. M. S. Braga
Keyword(s):  
Feeding Behaviour ◽  
Food Item ◽  
Main Food ◽  
Southeast Brazil ◽  
Main Food Item

Individuals of its own genus were the main food item of two species of tucunares (Cichla cf. ocellaris and Cichla monoculus) introduced into the Volta Grande Reservoir. The abundance of adult tucunares may cause intra-specific competition, possibly leading to the high cannibalism rates found.

The Diet of Rattus Lutreolus and Five Other Rodents in Southern Victoria.

1978 ◽  
Vol 5 (1) ◽  
pp. 47 ◽  
Author(s):  
CHS Watts ◽  
RW Braithwaite
Keyword(s):  
Mus Musculus ◽  
Plant Material ◽  
Food Item ◽  
Main Food ◽  
Coastal Heath ◽  
Autumn And Winter ◽  
Staple Diet ◽  
Main Food Item

Faeces were studied during 1 to 3 years for rodents live-trapped in 7 areas of Victoria. Diet changed with season for all 6 species studied. In general the staple diet of Rattus lutreolus was basal stem and young rhizome of monocotyledons, probably sedge, and of R. rattus was fungus. Fungus was a main food item for most species and places, especially in winter. Some was basidiomycete but by far the most, especially for R. rattus on coastal heath, was an underground phycomycete tentatively identified as Endogone incrassata. R. fuscipes ate various foods, mainly seeds, insects, fungus and fibrous plant material, whatever was seasonally abundant. Mus musculus ate mostly insects for most of the year, though it is usually considered granivorous and seed was available in summer. Only in June and July were insects less than half the value of food eaten. Pseudomys novaehollandiae ate many foods and almost no insects, but the sample of mice was too small to allow a general conslusion. P. shortridgei ate grass and fungus in autumn and winter but more variety in spring and summer, including flowers, seeds and insects.

scholarly journals The length and weight relationships and feeding ecology of knout goby, Mesogobius batrachocephalus (Pallas, 1814) from Southern Black Sea

2020 ◽  
Vol 37 (4) ◽  
pp. 409-414
Author(s):  
Elizabeth Grace Tunka Bengil ◽  
Mehmet Aydın
Keyword(s):  
Black Sea ◽  
Trophic Level ◽  
Feeding Ecology ◽  
Food Item ◽  
Niche Breadth ◽  
The Black Sea ◽  
Teleost Fishes ◽  
Main Food ◽  
Weight Relationship ◽  
Main Food Item

Among ecologically diverse gobies species, knout goby, Mesogobius batrachocephalus (Pallas, 1814), or previously known as Gobius batrachocephalus, is a Black Sea endemic species. There are studies on this species biological features along the Black Sea but there are only studies on its length and weight relationship along the Turkish coasts of the Black Sea. This study aims to contribute to the lack of knowledge on knout goby length and weight relationship and feeding ecology inhabiting Southern Black Sea. Total of 470 individual of knout goby was collected and it was previously reported that knout goby shows negative (-) allometry though within this study it was found that it only shows negative (-) allometry in spring and positive (+) allometry in other seasons. The diet was composed of crustaceans, teleost fishes and gastropods. According to the relative importance analysis, teleost fishes are the main food item for all and male individuals but for female crustaceans are the main food item. Trophic level results show that for all individuals trophic levels is 4.34, and when sexes are compared females have higher trophic level than males. While both sexes only consume teleost during summer, in other seasons females prefer more crustacean in their diet compared to males. Niche breadth index results indicated that when all individuals diet was compared among seasons in winter the niche breadth was the broader and summer was the narrower, in case of females the broader was fall and for males it was winter. In conclusion, feeding ecology of knout goby changes between seasons and sexes but general prey groups remain the same

ADDITIONS TO THE TAXONOMY, ZOOGEOGRAPHY, AND BIOLOGY OF ANALETRIS EXIMIA (ACANTHAMETROPODINAE: SILPHLONURIDAE: EPHEMEROPTERA)

1976 ◽  
Vol 108 (2) ◽  
pp. 199-207 ◽  
Author(s):  
D. M. Lehmkuhl
Keyword(s):  
Adult Male ◽  
Food Item ◽  
River System ◽  
Habitat Destruction ◽  
Male And Female ◽  
Main Food ◽  
Main River ◽  
River Current ◽  
Main Food Item

AbstractThe previously undescribed adult male and female of Analetris eximia Edmunds are treated. Additional features of nymphs are illustrated. In the Saskatchewan River system the species is found in areas unaffected by reservoirs; nymphs develop in May?, June, and July; adults emerge in late July. Nymphs are carnivorous (chironomids were the main food item in field collected specimens), live in backwaters adjacent to the main river current, and are morphologically adapted to life on an unstable silty substrate. Invasion of the Saskatchewan system was apparently via Missouri tributaries from the Colorado system. It occurred in recent times in the latter but apparently not the former. Because of habitat destruction, the species is considered endangered.

Spatial Distribution, Site Fidelity, and Home Range Overlap in the North Cascades Elk Herd: Implications for Management

2018 ◽  
Vol 92 (4) ◽  
pp. 251
Author(s):  
Jennifer Sevigny ◽  
Michael Sevigny ◽  
Emily George-Wirtz ◽  
Amanda Summers
Keyword(s):  
Spatial Distribution ◽  
Home Range ◽  
Site Fidelity ◽  
North Cascades ◽  
Home Range Overlap ◽  
The North ◽  
Range Overlap

scholarly journals Monitoring lidia cattle with GPS-GPRS technology; a study on grazing behaviour and spatial distribution

2017 ◽  
Vol 4 (4) ◽  
Author(s):  
Juan Manuel Lomillos Pérez ◽  
Marta Elena Alonso de la Varga ◽  
Juan José García ◽  
Vicente Ramiro Gaudioso Lacasa
Keyword(s):  
Spatial Distribution ◽  
Home Range ◽  
Cattle Breed ◽  
General Packet Radio Service ◽  
Pasture Management ◽  
Grazing Cattle ◽  
Position Data ◽  
Grazing Area ◽  
Different Dimensions ◽  
Grazing Behaviour

Veterinaria México OA ISSN: 2448-6760Cite this as:Lomillos Pérez JM, Alonso de la Varga ME, García JJ, Gaudioso Lacasa VR. Monitoring lidia cattle with GPS-GPRS technology; a study on grazing behaviour and spatial distribution. Veterinaria México OA. 2017;4(4). doi:10.21753/vmoa.4.4.405.The behavior of grazing cattle has not been studied as much as farmed animals. In certain breeds, reared in extensive systems, human presence can cause an interruption or modification in their ethological patterns moving away from the person watching them. The use of technologies like a Global Position System and a General Packet Radio Service (GPS-GPRS) allows monitoring bovine animals exploited in extensive systems, providing information in real time about distances traveled, home range grazing areas, frequented territories, behavior patterns, etc. In the present work, GPS-GPRS collars were used to monitor 21 cows of to the lidia cattle breed, with different ages, and from three different herds in the Salamanca province (Spain). The study lasted 8 months, the animals being distributed in enclosures of different dimensions and orographic characteristics, geographic position data being collected every 15 minutes. The proper functioning of the GPS-GPRS devices was proven and home range grazing area for each animal has been calculated, with an average of 56 hectares. A graph of animals’ circadian rhythm with the distances traveled for hours has been developed. A trend was observed to start daily activity hours before dawn, diminishing its activity with the evening and overnight, with a night’s rest phase of about 7 hours. We also report daily distance traveled (3.15 km on average), finding differences depending on age, available space allowance/animal, daylight and theseason. Our results could be of relevance for a better pasture management using enclosures of size that increase the use of all the surface available.Figure 3. Image of fencing No. 5 positions of the 3 animals monitored. Red, Yellow, Blue.

Sign in / Sign up

Export Citation Format

Share Document