Strong pair bonds and high site fidelity in a subarctic-breeding migratory shorebird

2018 ◽  
Vol 130 (1) ◽  
pp. 140-151 ◽  
Author(s):  
Casper H.A. van Leeuwen ◽  
Sarah E. Jamieson
Keyword(s):  
Author(s):  
Matthew S. Kendall ◽  
Laughlin Siceloff ◽  
Ashley Ruffo ◽  
Arliss Winship ◽  
Mark E. Monaco

AbstractSurprisingly, little is known about basic life history of the largest moray eel species in the Caribbean region, the green moray eel (Gymnothorax funebris). Sixteen eels were captured from the mangrove fringe in multiple bays on St. Croix, USVI, implanted with coded acoustic transmitters, and their movements were tracked for up to 11 months using an array of 37 stationary acoustic receivers. They exhibited high site fidelity in the bays during their residence, using the same general parts of individual bays and did not switch bays except for one individual. There was no relationship between eel size (mean TL = 83 cm, range = 54–126 cm) and home range size (mean area of 95% KUD = 5.8 ha ± 0.7 SE). Most individuals were more frequently detected at night than during the day suggesting greater nocturnal activity. Several of the larger eels (mean TL = 93 cm ± 5.9 SE) showed clear and permanent emigration tracks out of the mangrove estuary to coral reef habitats offshore. For some individuals, these habitat shifts were preceded by exploratory movements away from the eel’s typical home range the night before emigration. All final emigration events took place nocturnally, happened during a single night, and occurred during months from December to May. Mean emigration speed was 3.4 km/h. This study is the first documentation of an ontogenetic habitat shift in moray eels, as well as the first determination of home range size for this species and their site fidelity in mangrove habitats.


2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Patricia Kerches-Rogeri ◽  
Danielle Leal Ramos ◽  
Jukka Siren ◽  
Beatriz de Oliveira Teles ◽  
Rafael Souza Cruz Alves ◽  
...  

Abstract Background There is growing evidence that individuals within populations can vary in both habitat use and movement behavior, but it is still not clear how these two relate to each other. The aim of this study was to test if and how individual bats in a Stunira lilium population differ in their movement activity and preferences for landscape features in a correlated manner. Methods We collected data on movements of 27 individuals using radio telemetry. We fitted a heterogeneous-space diffusion model to the movement data in order to evaluate signals of movement variation among individuals. Results S. lilium individuals generally preferred open habitat with Solanum fruits, regularly switched between forest and open areas, and showed high site fidelity. Movement variation among individuals could be summarized in four movement syndromes: (1) average individuals, (2) forest specialists, (3) explorers which prefer Piper, and (4) open area specialists which prefer Solanum and Cecropia. Conclusions Individual preferences for landscape features plus food resource and movement activity were correlated, resulting in different movement syndromes. Individual variation in preferences for landscape elements and food resources highlight the importance of incorporating explicitly the interaction between landscape structure and individual heterogeneity in descriptions of animal movement.


<em>Abstract</em>.—The flathead catfish <em>Pylodictis olivaris</em> is one of the most important game fishes in the lower Minnesota River, providing a high-quality angling fishery. Information on flathead catfish movements and site fidelity in the Minnesota River at the reach scale is needed before fisheries managers consider options such as reach-specific fishing regulations. In addition, this information is necessary to determine if estimates of population abundance are feasible and what study design is most appropriate. Therefore, 18 radio- and acoustic-tagged adult flathead catfish were manually located in the lower Minnesota River during late summer and fall in 2008 and 2009. Most fish remained within about 2 km of their capture locations during daylight hours in August–September 2008. However, 17% of the fish emigrated from the 9.3-km study reach before the end of September, and all emigrated by the end of October. Fourteen (78%) of the original 18 fish survived and were present in the study reach again during August–September 2009. High site fidelity could result in heterogeneous vulnerability to late-summer angling among river reaches if some individual fish consistently return to areas frequented by anglers and others return to more remote and relatively inaccessible areas. Due to high survival and late-summer site fidelity, the potential exists for high recapture probabilities with repeated late-summer mark–recapture sampling in the same study reach; however, there is evidence that temporary emigration could be an important issue in long-term studies.


Oecologia ◽  
2011 ◽  
Vol 168 (1) ◽  
pp. 245-255 ◽  
Author(s):  
Benjamin C. Green ◽  
David J. Smith ◽  
Jonathan Grey ◽  
Graham J. C. Underwood

2015 ◽  
Vol 31 (4) ◽  
pp. 1427-1451 ◽  
Author(s):  
Sabre D. Mahaffy ◽  
Robin W. Baird ◽  
Daniel J. McSweeney ◽  
Daniel L. Webster ◽  
Gregory S. Schorr
Keyword(s):  

2003 ◽  
Vol 30 (5) ◽  
pp. 451 ◽  
Author(s):  
David Priddel ◽  
Robert Wheeler

Nesting activity of a population of malleefowl (Leipoa ocellata), isolated within a small mallee remnant in central New South Wales, was monitored annually between the summers of 1986–87 and 1998–99. A total of 148 nesting events was recorded. Only once was a new mound constructed rather than an old one reworked. Birds began and finished work on the mound progressively later each month (October to January). Nest-site fidelity was highly variable; some pairs persisted with the same mound for up to nine years while others relocated between a cluster of two, three or four mounds. Males displayed greater nest-site fidelity than females. After the loss of a partner, males tended to continue to use mounds they had used previously whereas females often relocated to a new mound. All individuals were monogamous. Pair bonds were maintained for life but, following the death of a partner, new bonds were quickly established with another unattached individual. Established pairs occasionally failed to breed, all such failures being coincident with years of low rainfall. Pairs that did not breed generally began construction of a nest but failed to complete the task. As far as can be ascertained, unpaired birds did not construct nests. The malleefowl population was characterised by a rapid turnover of breeding individuals, a high rate of adult mortality and a lesser rate of recruitment. The maximum longevity recorded for breeding adults was 12 years; average longevity was 7.5 years. Twenty-five adults were lost from the breeding population over a period of 9 years; meanwhile, 14 birds entered the breeding population. Thus, the ratio of adult mortality to recruitment was 1.79 : 1.00. Between 1986–87 and 1997–98 the population declined from at least 32 breeding adults to 14, at an average exponential rate of decrease of 0.075. Large population decreases were coincident with years of low rainfall. This population of malleefowl is predicted to become extinct by 2008.


2018 ◽  
Vol 8 (9) ◽  
pp. 4495-4507 ◽  
Author(s):  
Ondřej Slavík ◽  
Pavel Horký ◽  
Matúš Maciak ◽  
Petra Horká ◽  
Iva Langrová

2019 ◽  
Author(s):  
Timothy H. Parker ◽  
Bridget Sousa ◽  
Stephan T Leu ◽  
Stacy Edmondson ◽  
Cecily Foo ◽  
...  

Animal culture often shows geographic structure, with nearby individuals sharing more cultural features than individuals further apart. However, spatial extent of cultural features, along with the degree of conformity to local cultures, vary within and among species. Further, rates of cultural change presumably also vary, though documentation of temporal variability lags behind documentation of spatial variability, and mechanisms driving this variation have not been sufficiently explored. We hypothesized that conformity to local culture in Oscine songbirds and the persistence of culture over time and space are promoted by habitats that facilitate stable populations in which individuals show relatively high site fidelity. In contrast, sites in which habitat features cause rapid population turnover provide more vacant territories and so more opportunities for colonization. Colonization should drive more rapid cultural change, either through adult colonists importing foreign cultural variants or young colonists making errors as they learn the local song. To test these hypotheses, we examined temporal and spatial variation in vocal culture in a songbird (dickcissel, Spiza americana) in two distinct habitats. As predicted, we found high average site fidelity in relatively stable native grasslands and much lower average site fidelity in nearby cropland sites which were disturbed by farming practices during the breeding season. We also found higher levels of average song similarity and slower average changes in vocal culture in our grasslands relative to croplands, though we found no evidence of different spatial scales of song similarity between these habitats. Although our conclusions are based on many recorded songs, automated assessments of song similarity underestimated the overall degree of song similarity. Thus we may have also underestimated the strength of the effects of time and distance on song similarity. Despite these shortcomings, our results call attention to the understudied but potentially important role of demographic factors influencing cultural evolution.


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