Wyniki wyszukiwania

1

A flexible arrangement for the study of moles in captivity

100%

Borroni A., Loy A., Capanna E.

Acta Theriologica

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1999

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tom 44

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nr 2

A new arrangement for keeping moles in captivity was designed by combining newly conceived units and different types of structures previously described by other authors. The structure is especially devoted to long term studies, such as those on activity patterns and reproductive and social behaviours. A simple and economic system for automatic recording of activity rhythms in moles is also presented and discussed.

2

A method for studying social and reproductive behaviour of subterranean rodents in captivity

75%

Zenuto R. R., Vassallo A. I., Busch C.

Acta Theriologica

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2001

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tom 46

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nr 2

A methodology for studying the social and reproductive behaviour of solitary subterranean rodents under laboratory conditions is proposed. A first account of Ctenomys talarum (Thomas, 1898) behaviour is also provided with the aim of evaluating the proposed methodology and to advance presently unknown information on its social behaviour and mating system. The device is a seminatural enclosure, departing from traditional test cages with respect to increased: (1) size, (2) structural complexity, (3) social complexity, and (4) resemblance to natural conditions. It consists of artificial burrows each comprising 3.5 m of tunnel, a resource cage and a nest box, resembling the structural complexity described for C. talarum burrows. Burrows are connected to a common space, which allows social interaction among various individuals. Animals were observed in the seminatural enclosure - 3 females and 2 males, in accordance with sex ratios found in natural populations - for a period of 6 months. We obtained data related to reproductive and social behaviour: marking, aggression, vocalization, courtship and copulation, pregnancy, pup development, and parental care. The proposed system enables the collection of behavioural data as yet unavailable due to the secretive habits and aggressiveness that characterize this group of rodents, coupled with the difficulties associated with simulating subterranean conditions.

3

Female reproductive behaviour, ovarian hormones and vaginal cytology of the induced ovulator, Ctenomys talarum

63%

Fanjul M. S., Zenuto R. R.

Acta Theriologica

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2012

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tom 57

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nr 1

In the present study, we evaluated whether reproductive condition affects female reproductive behaviour in the induced ovulator Ctenomys talarum. We also explored the effect of the interaction with a male on the reproductive condition of females. To evaluate this, we arranged mating trials and evaluated female reproductive behaviour. Reproductive status of females was evaluated using a combined approach of vaginal smears, urinary progesterone and oestradiol, and ovarian histology. Behaviours denoting attraction (‘male sniff’ and ‘mount attempts’) and mutual courtship behaviours (‘spin’ and copula) were correlated with vaginal cytology before and oestradiol and progesterone levels in urine 12 h after male–female encounter. After 24 h of the interaction, oestradiol levels and vaginal epithelization increased while progesterone levels decreased in soliciting females. C. talarum females’ reproductive behaviour was related to its physiological reproductive state and vaginal cytology. The kind of male interaction, whether couples copulated or remained indifferent affected the later status of females. Females are induced ovulators by mating but male presence and interaction also affected other components of their reproductive physiology such as ovarian hormones and vaginal cytology.

4

Sperm transfer in monogenean (platyhelminth) parasites

63%

Kearn G., Whittington I.

Acta Parasitologica

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2015

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tom 60

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nr 4

5

Effect of the age of ganders on reproductive behavior and fertility in a competitive mating structure

63%

Gumulka M., Rozenboim I.

Annals of Animal Science

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2017

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tom 17

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nr 3

6

Age-specific reproductive behaviours in male roe deer Capreolus capreolus

63%

Melis C., Hoem S. A., Linnell J. D. C., Andersen R.

Acta Theriologica

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2005

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tom 50

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nr 4

445-452

The behaviour of active male roe deerCapreolus capreolus Linnaeus, 1758 was studied in a wild population on Storfosna island (Norway), during the pre-territorial and territorial seasons (February–August) of 1994. Observed behaviours were grouped in seven categories (mating, aggression, display, marking, vigilance, moving and maintenance), and the proportion of time spent in each behaviour by three age classes (yearlings, subadults and adults) was compared. Time spent in each behaviour varied significantly between months for all male age classes. From February to August, time spent in maintenance decreased, while time spent in vigilance increased. The time spent in mating increased both in adult and subadults but did not vary significantly for yearlings throughout the months. When comparing age classes within a month, there were no significant differences in time spent in each behaviour. Surprisingly, adult territorial males did not invest significantly more time in mating, with respect to yearlings and subadults. This may be consistent with the oligogynous mating system of roe deer, in which the reproductive success is divided amongst several years and their territoriality, which could be a tactic to reduce the competition for mating.

7

Reproductive behaviour of free-ringing rural dogs in West Bengal, India

63%

Pal S. K.

Acta Theriologica

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2003

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tom 48

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nr 2

Reproductive behaviour of free-ranging dogs Canis familiaris Linnaeus, 1758 was studied in a village in the state of West Bengal, India. Increased synchronized breeding was the most striking feature of this study. October (late monsoon) represented the peak period of mating for the feral dogs. Of all courting males, only 41% were observed to mount and copulate. On average, each male mounted 5.47 ± 2.49 (mean ± SD) times per hour. Of all mountings, only 10% were successful matings, ie copulatory ties. There was a negative correlation between the number of courting males and the number of successful copulations. The average duration of copulatory tie was 15.73 ± 7.75 min. Several factors interrupting the duration of copulatory ties were identified. December was the peak period of pup rearing. Mean litter size was 5.70 ± 2.03 with a male-biased sex ratio 1.41:1. Only a single annual breeding cycle recorded here differed from the previous studies on European and American dogs. Mothers spent most of the time with their pups at the dens during the early stage of rearing. The duration of time spent at dens by mothers was minimum when the pups were highly mobile at the age of 10 weeks. The lactating mothers were observed to be more aggressive immediately following litter production. Typically, an old adult male remained near the den as a 'guard'.

8

Sexual dimorphism of the vomeronasal organ and the accessory olfactory bulb of the mandarin vole Microtus mandarinus and the reed vole M.fortis

63%

Tai F. D., Wang T. Z., Zhang Y. H., Sun R. Y.

Acta Theriologica

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2004

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tom 49

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nr 1

Sexual dimorphisms of the vomeronasal organ (VNO) and the accessory olfactory bulb (AOB) of the mandarin vole Microtus mandarinus Milne-Edwards, 1871 and reed vole M. fortis Büchner, 1889 are reported for the first time in the present work. The thickness and length of the vomeronasal epithelium (VE) and the nuclear size of the receptor cells, the width and length of the granule cell zone, the width and length of the mitral cell zone, and the density of the mitral cells were surveyed. The thickness and length of the vomeronasal epithelium (VE), the length of the granule cell zone and the mitral cell zone, and the densities of mitral cells were significantly different between male and female reed voles. Male and female mandarin voles had no significant differences in any of these parameters. Polygamous reed voles had a greater degree of sexual dimorphism in VNO and AOB than did monogamous mandarin voles. The present results provide evidence to the hypothesis that the degree of sexual dimorphism may be related to the mating system.

9

Przegląd badań nad zachowaiem się skórka zbożowego Trogoderma granarium EVERTS (Coleoptera, Dermestidae)

32%

Dlugosz D., Lux S.

Wiadomości Entomologiczne

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1991

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tom 10

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nr 4

Ograniczanie wyników

A flexible arrangement for the study of moles in captivity

A method for studying social and reproductive behaviour of subterranean rodents in captivity

Female reproductive behaviour, ovarian hormones and vaginal cytology of the induced ovulator, Ctenomys talarum

Sperm transfer in monogenean (platyhelminth) parasites

Effect of the age of ganders on reproductive behavior and fertility in a competitive mating structure

Age-specific reproductive behaviours in male roe deer Capreolus capreolus

Reproductive behaviour of free-ringing rural dogs in West Bengal, India

Sexual dimorphism of the vomeronasal organ and the accessory olfactory bulb of the mandarin vole Microtus mandarinus and the reed vole M.fortis

Przegląd badań nad zachowaiem się skórka zbożowego Trogoderma granarium EVERTS (Coleoptera, Dermestidae)