M. Richards

Publications73
h-index24
Citations1,647
Highly Influential Citations117
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Changing paradigms in insect social evolution: insights from halictine and allodapine bees.
Until the 1980s theories of social insect evolution drew strongly on halictine and allodapine bees. However, that early work suffered from a lack of sound phylogenetic inference and detailed… Expand
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The socioecology of body size variation in the primitively eusocial sweat bee, Halictus ligatus (Hymenoptera: Halictidae)
Patterns of demographic and social variation exhibited by the sweat bee Halictus ligatus, reveal that the expression of eusocial colony organization is associated with local environmental conditions,… Expand
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LONG-TERM CHANGES IN SURVIVAL RATES OF LESSER SNOW GEESE'
Survival rates of adult and juvenile Lesser Snow Geese (Anser caerulescens caerulescens) were estimated based on hunter recoveries from over 80 000 geese banded between 1970 and 1988 at La Perouse… Expand
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Social Behaviours in Solitary Bees: Interactions Among Individuals in Xeralictus bicuspidariae Snelling (Hymenoptera: Halictidae: Rophitinae)
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Evidence for geographic variation in colony social organization in an obligately social sweat bee, Lasioglossum malachurum Kirby (Hymenoptera; Halictidae)
The expression of altruism and colony eusociality are both a matter of degree in social sweat bees. Even in obligately social species, variation in these traits may be observed across a species'… Expand
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A novel social polymorphism in a primitively eusocial bee
Halictine sweat bees (Hymenoptera, Halictidae) are model organisms for the evolution of altruism, reproductive castes, and eusocial colony organization. Halictine social behavior is not only… Expand
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Annual and Social Variation in Foraging Effort of the Obligately Eusocial Sweat Bee, Halictus ligatus (Hymenoptera: Halictidae)
Abstract Previous studies of the obligately eusocial sweat bee Halictus ligatus Say, at a nesting aggregation in Victoria, southern Ontario, Canada, showed how changes in local environmental… Expand
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Trophic aspects of caste determination in Halictus ligatus, a primitively eusocial sweat bee
Caste determination in primitively eusocial sweat bees is thought to be due to an interacting suite of factors, including size of the larval provision mass, time of year, and social context of the… Expand
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Annual variation in survival and reproduction of the primitively eusocial sweat bee Halictus ligatus (Hymenoptera: Halictidae)
We studied a nesting aggregation of the primitively eusocial sweat bee Halictus ligatus near Victoria in southern Ontario during the summers of 1984, 1990, and 1991. Differences in local weather… Expand
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Colony social organization of Lasioglossum malachurum Kirby (Hymenoptera, Halictidae) in southern Greece
SummaryWe studied the nesting and social biology of two aggregations of the obligately eusocial halictine bee Lasioglossum malachurum at Agios Nikolaos Monemvasias (ANM) in southern Greece.… Expand
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