Dominance, Age, and Reproductive Success in a Complex Society: A Long-Term Study of the Mexican Jay

Multiannual fluctuations in population density ("cycles") of small rodents have been known since antiquity (Elton 1942). Numerous hypotheses have been proposed to explain this phenomenon (for reviews see Finerty 1980, Taitt and Krebs 1985). However, none of these hypotheses, alone or in combination, have been able to explain the causality of cycles. The objectives of this long-term study are to determine whether environmental variables, possibly acting through reproductive responses, contribute to the multiannual fluctuations of the montane vole, Microtus montanus.

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Climatic Factors, Reproductive Success and Population Dynamics in the Montane Vole, Microtus montanus

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.1987.2647 ◽

1987 ◽

Vol 11 ◽

pp. 103-105

Author(s):

Aelita Pinter

Keyword(s):

Population Dynamics ◽

Reproductive Success ◽

Population Density ◽

Environmental Variables ◽

Climatic Factors ◽

Small Rodents ◽

Term Study ◽

Microtus Montanus ◽

Long Term Study

Multiannual fluctuations in population density of small rodents have been known since antiquity. However, factors responsible for this phenomenon remain unknown (Krebs and Myers 1974, Finerty 1980, Taitt and Krebs 1985). The objectives of this long-term study are to determine whether environmental variables, possibly acting through reproductive responses, contribute to the multiannual fluctuations of the montane vole, Microtus montanus.

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Climatic Factors, Reproductive Success and Population Dynaimcs in the Montane Vole, Microtus Montanus

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.1995.3251 ◽

1995 ◽

Vol 19 ◽

pp. 73-75

Author(s):

Aelita Pinter

Keyword(s):

Reproductive Success ◽

Population Density ◽

Environmental Variables ◽

Climatic Factors ◽

Small Rodents ◽

Term Study ◽

Microtus Montanus ◽

Long Term Study

Multiannual fluctuations in population density ("cycles") of small rodents have been known since antiquity (Elton 1942). Numerous hypotheses have been proposed to explain this phenomenon (for reviews see Finerty 1980, Taitt and Krebs 1985). However, none of these hypotheses, alone or in combination, has been able to explain the causality of cycles. The objectives of this long-term study are to determine whether environmental variables, possibly acting through reproductive responses, contribute to the multiannual fluctuations of the montane vole, Microtus montanus.

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How accurately do behavioural observations predict reproductive success in free-ranging lizards?

Biology Letters ◽

10.1098/rsbl.2019.0030 ◽

2019 ◽

Vol 15 (2) ◽

pp. 20190030 ◽

Cited By ~ 1

Author(s):

Mats Olsson ◽

Tonia S. Schwartz ◽

Erik Wapstra ◽

Richard Shine

Keyword(s):

Reproductive Success ◽

Adult Males ◽

Microsatellite Data ◽

Term Study ◽

Long Term Study ◽

Lacerta Agilis ◽

Free Ranging ◽

Number Of Males ◽

Variance In Reproductive Success

Behavioural ecologists often use data on patterns of male–female association to infer reproductive success of free-ranging animals. For example, a male seen with several females during the mating season is predicted to father more offspring than a male not seen with any females. We explored the putative correlation between this behaviour and actual paternity (as revealed by microsatellite data) from a long-term study on sand lizards ( Lacerta agilis ), including behavioural observations of 574 adult males and 289 adult females, and paternity assignment of more than 2500 offspring during 1998–2007. The number of males that contributed paternity to a female's clutch was correlated with the number of males seen accompanying her in the field, but not with the number of copulation scars on her body. The number of females that a male accompanied in the field predicted the number of females with whom he fathered offspring, and his annual reproductive success (number of progeny). Although behavioural data explained less than one-third of total variance in reproductive success, our analysis supports the utility of behavioural-ecology studies for predicting paternity in free-ranging reptiles.

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Climatic Factors, Reproductive Success and Population Dynamics in the Montane Vole, Microtus montanus

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.1988.2727 ◽

1988 ◽

Vol 12 ◽

pp. 121-124

Author(s):

Aelita Pinter

Keyword(s):

Population Dynamics ◽

Reproductive Success ◽

Population Density ◽

Environmental Variables ◽

Climatic Factors ◽

Small Rodents ◽

Term Study ◽

Microtus Montanus ◽

Long Term Study

Multiannual fluctuations in population density ("cycles") of small rodents have been known since antiquity (Elton 1942). Numerous hypotheses have been proposed to explain this phenomenon (for reviews see Krebs and Myers 1974, Finery 1980, Taitt and Krebs 1985). However, none of these hypotheses, alone or in combination, can explain the causality of cycles. The objectives of this long-term study are to determine whether environmental variables, possibly acting through reproductive responses, contribute to the multiannual fluctuations of the montane vole, Microtus montanus.

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A long-term study reveals multiple reproductive behavior strategies among territorial adult male Steller sea lions (Eumetopias jubatus)

Canadian Journal of Zoology ◽

10.1139/cjz-2013-0099 ◽

2014 ◽

Vol 92 (5) ◽

pp. 405-415 ◽

Cited By ~ 6

Author(s):

Pamela Parker ◽

John M. Maniscalco

Keyword(s):

Reproductive Success ◽

Gulf Of Alaska ◽

Lifetime Reproductive Success ◽

First Year ◽

Eumetopias Jubatus ◽

Steller Sea Lions ◽

Term Study ◽

Sea Lions ◽

Long Term Study

We conducted a long-term study to assess how tenure and territorial behaviors influence reproductive success among male Steller sea lions (Eumetopias jubatus (Schreber, 1776)). Copulations by males (n = 44) that maintained territories on a rookery in the Gulf of Alaska from 2001 to 2009 were observed using a remote video system. Approximately half of postpartum females copulated with a male in a different territory from where they gave birth. Nearly two-thirds of territorial males with known tenure were unsuccessful in copulating during their first year. Number of copulations for territorial males increased from acquisition year to year 2 with no change in subsequent years. Cluster analysis of tenure and territorial tactic variables for 15 males with observed lifetime reproductive success was used to describe multiple reproductive strategies. Characteristics of the two most successful strategies were the following: (i) males typically copulated in their first year, retained the same territories for 3–5 years, and occupied centrally located coastal territories where the highest percentage of females gave birth and (ii) males did not copulate until at least their third year and occupied peripheral territories with fewer births for a longer tenure of 7–8 years. Results indicated that lifetime reproductive success was not achieved solely by time on the breeding area; rather, it was achieved from a combination of tenure and territorial tactics.

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Climatic Factors, Reproductive Success and Population Dynamics in the Montane Vole, Microtus montanus

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.1996.3291 ◽

1996 ◽

Vol 20 ◽

pp. 88-90

Author(s):

Aelita Pinter

Keyword(s):

Population Dynamics ◽

Reproductive Success ◽

Population Density ◽

Environmental Variables ◽

Climatic Factors ◽

Small Rodents ◽

Term Study ◽

Microtus Montanus ◽

Long Term Study

Multiannual fluctuations in population density ("cycles") of small rodents have been known since antiquity (Elton 1942). Numerous hypotheses have been proposed to explain this phenomenon (for reviews see Finerty 1980, Taitt and Krebs 1985). However, none of these hypotheses, alone or in combination, has been able to explain the causality of cycles. The objectives of this long-term study are to determine whether environmental variables, possibly acting through reproductive responses, contribute to the multiannual fluctuations of the montane vole, Microtus montanus.

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