Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"Polygyny"”.
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Breeding behaviour and polygyny in the Red Bishop bird Euplectes orix (L.)
… (1935) first described territorial behaviour and polygyny in Euplectes hordeaceus, and later Moreau and Moreau (1938) and Fuggles-Couchman (1942) compared the ecology of E. hordeaceus and E. nigroventris. Skead (1956) produced a valuable basic study of E. orix, and showed it to be polygynous. …
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Behavioural, mensural, and ecological correlates of polygyny in the eastern meadowlark (Sturnella magna)
… (Weatherhead and Robertson,1977) and the polygyny threshold model (Verner and Willson,1966, Orians, 1969). Male attributes investigated were male size and song behaviour. Six measures of male size were taken: weight, flattened and natural wing chord length, culmen length, bill depth and …
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Extra-pair paternity within the female-defense polygyny of the lizard, Anolis carolinensis: Evidence of alternative mating strategies
… competition is intense due to an average polygyny ratio of 1 male to 3 females despite a 1:1 adult sex ratio. Through high levels of territorial behavior (e.g., 100 displays/h, 27 m patrol distances/h, 70% of day in defense-related activities), males attempt to exclude other males from …
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Family Structure And Women’s Experiences Of Intimate Partner Violence
… forms are equally available to all people. Polygyny, for example, when one man has two or more wives, is officially practiced in over eight hundred societies worldwide. However, there is a paucity of research looking at how marital types (i.e., polygyny) relates to IPV. This multi-paper, …
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Dampak Psikologis isteri akibat poligami secara siri: Studi di Desa Tapaan Kecamatan Bugul Kidul Kota Pasuruan
… allows a husband to have more than one wife (polygyny), but not require it or recommend it. The permissibility of polygyny is a small emergency door through which the current is very necessary or in other words can be used as emergency exit that is preventive and not a light to those terms. …
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Polymorphic social organisation in a eusocial insect : the ultimate and proximate causes
… reproduce relatively evenly in most populations (polygyny), but I show that skew is particularly high in a Spanish and Japanese population where just one queen out of many monopolises all reproduction (functional monogyny). I further investigated how high skew among queens was maintained in the …
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Individual reproductive strategies in the dusky warbler (Phylloscopus fuscatus)
… this population is characterised by facultative polygyny (17 per cent of the males mated with more than one female), and by an outstandingly high rate of extra-pair paternity (45 per cent of the offspring was not sired by the social partner of the female). The occurrence of polygyny is best …
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The biology of the Cape Weaver Ploceus Capensis with special reference to its polygnous mating system
… incubation strategy are apparent adaptations to polygyny and its concomitant fluctuating food source. The ultimate and proximate factors influencing the breeding season are also discussed. This study presents the first comprehensive study of moult in passerines in southern Africa. The more …
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The evolution of caste-specific morphology and colony structure in ants
… involved a shift from limited polydomy and polygyny throughout the genus, to extreme polydomy and polygyny in L. humile via a gradual change in the ‘humile’ species group. Additionally, I compared the data on colony structure in Linepithema to the frequency in which they have been detected …
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The Nesting Biology & Parental Behavior of the Prothonotary Warbler, Protonotaria Citrea, in Southwestern Missouri
… cover appeared to influence occupancy rates. As polygyny in prothonotary warblers is not uncommon, parental care was evaluated to determine if females contributed more parental care than males, in terms of incubation, foraging, fecal sac dispersal, and aggression toward possible predators and …
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Investigating the possible change in breeding strategy of African black oystercatchers
… are very territorial, co-operative polygyny was rejected as a sole cause (through observations). As eggs were found to be significantly similar (through intra-clutch egg shape comparisons) within clutches egg-dumping as a cause was also rejected. It was thus established that the …
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The constitutional and statutory position of the 'other' wife: a comparative study of constitutional rights and polygamous customary marriages in Commonwealth Africa
… largely side-line and ignore the possibility of polygyny in a customary marriage and the potential for human rights violations therein. I analyze the discursive mechanisms that facilitate the contradiction that arises when constitutional commitments to protect the rights of women in polygynous …
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Home range and activity in a Virginia population of Sceloporus undulatus
… of behavior reflected the requirements of polygyny. The lizards were seen most often on the piles of debris that characterized the study site. Home range size was most strongly influenced by the debris pile size. Mean home range sizes (MCP, N≥5) were 69.3 m² and 59.9 m² for adult males and …
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Population Dynamics of the Endangered Black-capped Vireo (Vireo atricapilla)
… in mating strategy through an observation of polygyny in a territorial male vireo. Land managers of vireo breeding populations should consider habitat needs across the entire reproductive cycle: cowbird control will increase nest success and breeding sites that provide nearby or adjacent …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
… high female-female competition. Resource defense polygyny may be one such system since females congregate on high-quality nutrient sources, leading to substantial opportunities for interference competition. I studied female Grant’s gazelle (Nanger granti), a classic resource defense polygynous …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
… high female-female competition. Resource defense polygyny may be one such system since females congregate on high-quality nutrient sources, leading to substantial opportunities for interference competition. I studied female Grant’s gazelle (Nanger granti), a classic resource defense polygynous …
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The evolution of social traits and biodiversity in the ants.
… the presence of discrete worker castes and polygyny are associated with increased diversification rates in ants. This thesis provides a valuable tool for the study of comparative hypotheses in the ants in the form of a complete genus-level phylogeny, and offers significant evidence to …
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Meidob kinship, marriage and residence
… of this system would appear to be that of polygyny and its associated residence patterns These demonstrate how the polygynous union does not have the expected result whereby a man expands his co-resident.family group . Instead we find that the dominantly virilocal pattern of first marriage …
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