Intra- and interspecific agonistic behaviour in sympatric harriers during the breeding season

2002 ◽  
Vol 64 (1) ◽  
pp. 77-84 ◽  
Author(s):  
J.T Garcia ◽  
B.E Arroyo
Keyword(s):  
Breeding Season ◽  
Agonistic Behaviour

Behavioural asymmetries and cohesive mother–offspring sociality in bushy-tailed wood rats

1992 ◽  
Vol 70 (3) ◽  
pp. 597-604 ◽  
Author(s):  
Richard A. Moses ◽  
John S. Millar
Keyword(s):  
Breeding Season ◽  
Adult Female ◽  
Reproductive Status ◽  
Habitat Patch ◽  
Agonistic Behaviour ◽  
Rock Outcrops ◽  
Neotoma Cinerea ◽  
Behavioural Asymmetries ◽  
Behavioural Interactions ◽  
Resource Patches

Bushy-tailed wood rats (Neotoma cinerea) are usually confined to highly clumped resource patches (i.e., rock outcrops), and potentially compete for limited den sites within outcrops. Adults may breed on the same outcrop over several years, and philopatric yearlings usually breed in proximity to close kin. We investigated the influence of kinship and reproductive status on the nature and stability of wood rat sociality. Behavioural interactions among mother–offspring and adult female – nonkin dyads from the wild were quantified in a neutral arena during (i) the autumn when offspring were immature subadults, and (ii) the following spring, when all dyad members were reproductively active. Nonkin dyads were characterized almost entirely by agonistic behaviour. Virtually all amicable behaviour was directed toward close kin, and most interactions among kin dyads were amicable. Further, these strong kin-based behavioural asymmetries did not differ between the autumn and the subsequent breeding season, and could not be explained by postweaning familiarity (i.e., residency on a common habitat patch) alone. Wood rat sociality appears to be characterized by two elements: (i) divisive agonism directed toward nonkin, and (ii) stable, cohesive relationships among close kin (mother–offspring). Possible causes and consequences of sociality in bushy-tailed wood rats are discussed.

How do population density and food supply influence social behaviour in the snowshoe hare (Lepus americanus)?

1993 ◽  
Vol 71 (6) ◽  
pp. 1084-1089 ◽  
Author(s):  
Jean Ferron
Keyword(s):  
Population Density ◽  
Breeding Season ◽  
Group Size ◽  
Food Availability ◽  
Social Behaviour ◽  
Lepus Americanus ◽  
Snowshoe Hare ◽  
Agonistic Behaviour ◽  
Nonbreeding Season ◽  
The Impact

The influence of population density and food on the social behaviour of the snowshoe hare (Lepus americanus) was studied in an outdoor enclosure. The year was divided into two periods: the nonbreeding season (October to March) and the breeding season (April to August). During each period, data on social interactions were recorded for groups of 4, 6, 8, and 10 animals, with three different sets of animals for each group size. Agonistic behaviour characterized social encounters between hares year-round. During the nonbreeding season, there was a significant correlation between agonistic behaviour and group size for females only. During the breeding season, the rate of interaction was lower and agonistic behaviour was significantly and negatively correlated with group size for males only. Two-way ANOVA of total agonistic behaviour revealed that group size and sex interacted significantly only during the nonbreeding season. The different categories of agonistic behaviour (aggression, threat, and taking the place of another animal) were also analysed separately. The distribution of aggression within each of the experimental groups indicated that the two top-ranking animals were generally males and that they initiated most of the aggressive encounters. Another experiment with restricted food availability was conducted to study the impact of limited resources on agonistic behaviour. Hares were significantly more aggressive when food was restricted than when food was available ad libitum. It thus appears that food availability has a stronger influence on social behaviour than does hare density.

Observation on the breeding biology of Polypedates teraiensis (Dubois, 1987) (Amphibia: Rhacophoridae)

2017 ◽  
Vol 17 (1) ◽  
pp. 25-32
Author(s):  
Jacinta Lalchhanhimi ◽  
Lalremsanga H.T.
Keyword(s):  
Sexual Dimorphism ◽  
Breeding Season ◽  
Sound Production ◽  
Reproductive Function ◽  
Breeding Biology ◽  
Tree Frog ◽  
University Campus ◽  
Morphometric Measurements ◽  
Advertisement Calls ◽  
Males And Females

The breeding biology of tree frog, Polypedates teraiensis was studied during the breeding season at Mizoram University Campus. It was found that sound production by male during the breeding season was primarily a reproductive function and advertisement calls attract females to the breeding areas and announce other males that a given territory is occupied. The aim of this study was to provide the detailed information on the breeding behaviour and the advertisement calls of Polypedates teraiensis. The morphometric measurements of the amplecting pairs (males and females) for sexual dimorphism along with clutch sizes were also studied.

An Ethogram of the Toad-headed Lizard Phrynocephalus vlangalii during the Breeding Season

2011 ◽  
Vol 2 (2) ◽  
pp. 110-116 ◽  
Author(s):  
QI Yin ◽  
LI Shasha ◽  
SUO Langduoerji ◽  
LI Hua ◽  
WANG Yuezhao
Keyword(s):  
Breeding Season
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