scholarly journals Lifetime fitness correlates of natal dispersal distance in a colonial bird

2011 ◽  
Vol 81 (1) ◽  
pp. 97-107 ◽  
Author(s):  
David Serrano ◽  
José L. Tella
Keyword(s):  
Dispersal Distance ◽  
Natal Dispersal ◽  
Lifetime Fitness ◽  
Colonial Bird

scholarly journals Inbreeding Depression and its Effects on Natal Dispersal in Red-Cockaded Woodpeckers

The Condor ◽  
2000 ◽  
Vol 102 (3) ◽  
pp. 482-491 ◽  
Author(s):  
Susan J. Daniels ◽  
Jeffrey R. Walters
Keyword(s):  
Spatial Clustering ◽  
Large Population ◽  
Dispersal Distance ◽  
Significant Loss ◽  
Natal Dispersal ◽  
Picoides Borealis ◽  
Fitness Consequences ◽  
Cooperatively Breeding ◽  
Dispersal Behavior ◽  
Close Inbreeding

Abstract Natal dispersal is a key life-history component that may be influenced by the fitness consequences of inbreeding. We studied natal dispersal and inbreeding within a large population of cooperatively breeding, endangered Red-cockaded Woodpeckers (Picoides borealis). We assessed the costs of close inbreeding, the spatial distribution of related males and its relationship to dispersal distance of females, and the change in dispersal behavior of females in the presence of closely related males. Close inbreeding resulted in a significant loss of fitness, through two separate effects: closely related pairs (kinship coefficient ≥ 0.125) exhibited lowered hatching rates and lowered survival and recruitment of fledglings relative to unrelated pairs. Despite a highly predictable spatial clustering of closely related males near the female's natal territory, natal dispersal distance of females was not sufficient to avoid these males as mates. Females changed dispersal behavior in the presence of closely related males on the natal territory: female fledglings were significantly more likely to disperse from natal territories if there were closely related males breeding there in the following year. Females did not change dispersal behavior in the presence of related males that were not on the natal territory. We suggest that dispersal behavior is a trade-off between benefits of short-distance dispersal, e.g., an advantage in competing for scarce breeding vacancies, and the substantial cost of close inbreeding.

scholarly journals Sex-Related Natal Dispersal of Pied Flycatchers: How Far Away From Home?

The Condor ◽  
2006 ◽  
Vol 108 (3) ◽  
pp. 711-717
Author(s):  
Nikita Chernetsov ◽  
Leonid V. Sokolov ◽  
Vladislav Kosarev ◽  
Dmitry Leoke ◽  
Mikhail Markovets ◽  
...  
Keyword(s):  
Frequency Distribution ◽  
Null Model ◽  
Ficedula Hypoleuca ◽  
Dispersal Distance ◽  
Natal Dispersal ◽  
Nest Box ◽  
Nest Boxes ◽  
Baltic Coast ◽  
The Difference ◽  
Dispersal Distances

Abstract Over four years, nestling Pied Flycatchers (Ficedula hypoleuca) were banded and recaptured in nest boxes at a 44 km long and 1–1.5 km wide study area along the Courish Spit on the southeast Baltic coast. The return rate for males was nearly twice as high as for females. Males settled significantly closer to their natal sites than predicted by the null model, which assumed that any nest box in the study area was selected at random. For females, the frequency distribution of natal dispersal distances was not significantly different from that predicted by the null model. The difference in average dispersal distance between the sexes was highly significant. Although some individuals settled within tens of kilometers, most male Pied Flycatchers settled within several kilometers of their natal sites. We suggest that even if females settle on average farther from their natal sites than males do, both sexes imprint on a relatively small (several kilometers in diameter) area during postfledging exploration, to which they return each spring.

scholarly journals Natal and intergenerational dispersal of riverine smallmouth bass Micropterus dolomieu

2021 ◽  
Author(s):  
Robert Humston ◽  
Eric M Hallerman ◽  
Scott Smith ◽  
Juli Sorenson ◽  
Garrett Muckleroy
Keyword(s):  
Isolation By Distance ◽  
Population Data ◽  
Early Life History ◽  
Dispersal Distance ◽  
Smallmouth Bass ◽  
Natal Dispersal ◽  
Otolith Chemistry ◽  
Micropterus Dolomieu ◽  
Population Spread ◽  
Lake Systems

Quantifying the scale of offspring dispersal is essential for understanding demographic connectivity across landscapes and rates of population spread. However, characterizing natal dispersal in fishes is complicated by the difficulties of tracking origins and movement during early life-history stages. We combined direct observation of natal dispersal based on otolith chemistry with indirect estimates of dispersal from population genetics to quantify intergenerational dispersal of smallmouth bass inhabiting a river network. Average parent-offspring dispersal was estimated as 7.7 km from genetic isolation-by-distance and demographic population data. Otolith chemistry indicated that adults were captured an average of 8.3 km from their natal tributary, supporting the genetics-based estimate. Our estimate of intergenerational dispersal is higher than previous estimates for lotic fishes and considerably higher than estimates for smallmouth bass in lake systems. Differences in availability of seasonal habitats for smallmouth bass may account for the contrasting scales of dispersal between lake and river populations. The large intergenerational dispersal distance of riverine smallmouth bass should be considered in conservation of fisheries or efforts to control invasive populations in river networks.

scholarly journals Age at First Breeding and Natal Dispersal in a Declining Population of Cassin's Auklet

The Auk ◽  
2001 ◽  
Vol 118 (4) ◽  
pp. 996-1007 ◽  
Author(s):  
Peter Pyle ◽  
D. Nettleship
Keyword(s):  
Low Cost ◽  
Population Decline ◽  
Significant Proportion ◽  
Linear Increase ◽  
Dispersal Distance ◽  
Natal Dispersal ◽  
Breeding Density ◽  
Natal Philopatry ◽  
Mate Fidelity ◽  
Cassin's Auklet

Abstract Age of first breeding (AFB) and natal dispersal distance (NDD) were investigated relative to proximate and ultimate factors in 276 known-age Cassin's Auklets (Ptychoramphus aleuticus) breeding during 1981–1999 on Southeast Farallon Island, California. Breeding density in 446 study boxes declined significantly during the period 1987–1999, confirming other information indicating a long-term decline (since at least the 1970s) in the population. Mean AFB was 3.34 years when sexes were combined, ranging from 2–10 (mean 3.36) years in females and 2–9 (mean 3.36) years in males. AFB showed a significant linear increase with decreasing colony density, suggesting that increased stress on the entire population, such as that caused by decreasing food availability, may have prevented younger birds from attaining breeding condition at an early age. Median NDD was 8.84 m, ranging from 0–448.7 m; two individuals of each sex recruited into their natal boxes. NDD showed a significant linear increase with decreasing breeding density but no significant linear or curvilinear correlations with mate fidelity, annual reproductive success, or lifetime reproductive output. A significant proportion (66.9%) of movements after recruitment (breeding dispersal) resulted in closer proximity to the natal site. Thus, although natal philopatry was strongly developed in the Cassin's Auklet, it did not seem to be adaptive. Those paradoxical results suggest that selective equilibrium may be acting on natal philopatry in response to the population decline: a low-philopatry, low-cost (later breeding and increased survival) strategy has become increasingly adaptive in Cassin's Auklets, explaining increases in AFB and NDD with the declining breeding densities. The lack of sex-specific effects on AFB and NDD suggests that an even sex-ratio and roughly equal roles in reproduction among Cassin's Auklets exists on Southeast Farallon Island, and that inbreeding avoidance may be counter-balanced by relatively low mate fidelity in this species.

scholarly journals Sex, personality and conspecific density influence natal dispersal with lifetime fitness consequences in urban and rural burrowing owls

PLoS ONE ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. e0226089 ◽  
Author(s):  
Álvaro Luna ◽  
Antonio Palma ◽  
Ana Sanz-Aguilar ◽  
José L. Tella ◽  
Martina Carrete
Keyword(s):  
Natal Dispersal ◽  
Lifetime Fitness ◽  
Burrowing Owls ◽  
Conspecific Density ◽  
Fitness Consequences

Personality is correlated with natal dispersal in North American red squirrels (Tamiasciurus hudsonicus)

Behaviour ◽  
2017 ◽  
Vol 154 (9-10) ◽  
pp. 939-961 ◽  
Author(s):  
Eve B. Cooper ◽  
Ryan W. Taylor ◽  
Amanda D. Kelley ◽  
April Robin Martinig ◽  
Stan Boutin ◽  
...  
Keyword(s):  
Individual Differences ◽  
North American ◽  
Dispersal Distance ◽  
Natal Dispersal ◽  
Tamiasciurus Hudsonicus ◽  
Dispersal Behaviour ◽  
Red Squirrels ◽  
Intrinsic Factors ◽  
External Conditions ◽  
North American Red Squirrels

Individual natal dispersal behaviour is often difficult to predict as it can be influenced by multiple extrinsic and intrinsic factors. Individual differences in personality have been shown to be an important correlate of dispersal behaviour. However, the relationships between personality traits and dispersal are often inconsistent within and across studies and the causes of these discrepancies are often unknown. Here we sought to determine how individual differences in activity and aggression, as measured in an open-field trial, were related to natal dispersal distance in a wild population of North American red squirrels (Tamiasciurus hudsonicus). For 14 cohorts, while individual aggression consistently had no association with dispersal distance, the association between activity and dispersal fluctuated through time, mediated by population density. The environmental-dependence of the relationship between personality and dispersal in this population is indicative of the importance of considering external conditions when predicting dispersal behaviour.

scholarly journals Dispersal distance is driven by habitat availability and reproductive success in Northern Great Plains piping plovers

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Rose J. Swift ◽  
Michael J. Anteau ◽  
Kristen S. Ellis ◽  
Megan M. Ring ◽  
Mark H. Sherfy ◽  
...  
Keyword(s):  
Reproductive Success ◽  
Great Plains ◽  
Dispersal Distance ◽  
Individual Characteristics ◽  
Natal Dispersal ◽  
Northern Great Plains ◽  
Habitat Availability ◽  
Charadrius Melodus ◽  
Piping Plovers ◽  
Dispersal Distances

Abstract Background Dispersal is a critical life history strategy that has important conservation implications, particularly for at-risk species with active recovery efforts and migratory species. Both natal and breeding dispersal are driven by numerous selection pressures, including conspecific competition, individual characteristics, reproductive success, and spatiotemporal variation in habitat. Most studies focus on dispersal probabilities, but the distance traveled can affect survival, fitness, and even metapopulation dynamics. Methods We examined sources of variation in dispersal distances with 275 natal dispersal and 1335 interannual breeding events for piping plovers (Charadrius melodus) breeding in the Northern Great Plains between 2014 and 2019. Results Natal dispersal was on average longer (mean: 81.0 km, median: 53 km) than adult breeding movements (mean: 23.7 km, median: 1 km). Individuals moved the shortest distances when hatched, previously nested, or settling on river habitats. When more habitat was available on their natal area than in the year prior, hatch-year birds moved shorter distances to their first breeding location. Similarly, adults also moved shorter distances when more habitat was available at the settling site and when in closer proximity to other known nesting areas. Additionally, adult movement distance was shorter when successfully hatching a nest the year prior, retaining a mate, or initiating a current nest earlier. Conclusion Habitat availability appears to be associated with dispersal distance for both hatch-year and adult piping plovers. Conservation efforts that integrate dispersal distances may benefit from maintaining nesting habitat within close proximity to other areas for adults and a network of clustered sites spread out across a larger landscape for natal dispersal.

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