scholarly journals Migration‐tracking integrated phylogeography supports long‐distance dispersal‐driven divergence for a migratory bird species in the Japanese archipelago

2021 ◽  
Author(s):  
Daisuke Aoki ◽  
Haruna Sakamoto ◽  
Munehiro Kitazawa ◽  
Alexey P. Kryukov ◽  
Masaoki Takagi
Keyword(s):  
Bird Species ◽  
Migratory Bird ◽  
Long Distance Dispersal ◽  
Long Distance ◽  
Japanese Archipelago ◽  
The Japanese Archipelago

scholarly journals Influence of gut morphology on passive transport of freshwater bryozoans by waterfowl in Doñana (southwestern Spain)

2004 ◽  
Vol 82 (6) ◽  
pp. 835-840 ◽  
Author(s):  
Jordi Figuerola ◽  
Andy J Green ◽  
Katrina Black ◽  
Beth Okamura
Keyword(s):  
Aquatic Invertebrates ◽  
Bird Species ◽  
Passage Time ◽  
Passive Dispersal ◽  
Long Distance Dispersal ◽  
Long Distance ◽  
Active Dispersal ◽  
Intestine Length ◽  
Internal Transport

Waterbirds have been proposed as important vectors for the passive dispersal of those aquatic invertebrates and plants that lack a capacity for active dispersal between isolated water bodies. We analysed the frequency of internal transport of bryozoan propagules (statoblasts) by waterbirds in Doñana, Spain, by examining their presence in the intestines and ceca of dead birds and analysing the role of different aspects of gut characteristics in explaining variation in the presence/absence and abundance of statoblasts. Of the 228 samples examined, 7.9% presented intact statoblasts of Plumatella fungosa (Pallas, 1768), Plumatella emarginata Allman, 1844, and two unidentified Plumatella species. For a given bird species, individuals with heavier gizzards and shorter ceca had a lower incidence and abundance of statoblasts in the lower gut. Grit mass and intestine length were unrelated to the presence or abundance of statoblasts. Our results suggest that waterbirds frequently transport bryozoans on a local scale, with lighter gizzards and longer ceca favouring such transport. Lighter gizzards are likely to destroy fewer propagules before they reach the lower gut. Species and individuals with longer ceca are particularly good candidates for long-distance dispersal of bryozoans, given the longer passage time of propagules that enter the ceca.

Seasonal Variations of Avifauna of Shallabug Wetland, Kashmir

1970 ◽  
pp. 20-34 ◽  
Author(s):  
Imran A Dar ◽  
Mithas A Dar
Keyword(s):  
Research Work ◽  
Bird Species ◽  
Migratory Bird ◽  
Current Status ◽  
High Power Field ◽  
Long Distance ◽  
Monthly Basis ◽  
Bird Population ◽  
Different Seasons ◽  
Vantage Points

The main thrust in this research work has been given on the evaluation of current status of Avifauna associated with Shallabug wetland. The main objectives were to evaluate the bird population fluctuation, to determine various threats to waterbirds and their habitats, and to present the remedial measures based on the key issues identified. For the purpose of present investigation, the study area was divided systematically into three study units of 700 m² each. Visual census method was used for the estimation of bird population. Visual counting was made with the help of high power field binocular (SG- 9.2) from respective vantage points. The birds were observed on the monthly basis in 2008 and the fluctuation in bird population was determined in different seasons: summer, autumn and winter.  The observations were made from 5:00 am to 7:00 am (when they come out from their resting place) and 6:00 pm to 7:00 pm (when they approach towards their resting place). The analysis of the results showed that the Shallabug Wetland is particularly important for migratory bird species and marsh land breeding species. The wetland was also found important for long distance migrants as a stopper site for feeding and resting. The bird population showed fluctuation with site differences as well as with changing seasons. Key words: Wetland, Shallabug, Avifauna, Fluctuation, Wetland managementDOI: 10.3126/jowe.v2i1.1853 Journal of Wetlands Ecology, (2009) vol. 2, pp 20-34

DNA barcoding reveals 24 distinct lineages as cryptic bird species candidates in and around the Japanese Archipelago

2014 ◽  
Vol 15 (1) ◽  
pp. 177-186 ◽  
Author(s):  
Takema Saitoh ◽  
Norimasa Sugita ◽  
Sayaka Someya ◽  
Yasuko Iwami ◽  
Sayaka Kobayashi ◽  
...  
Keyword(s):  
Dna Barcoding ◽  
Bird Species ◽  
Japanese Archipelago ◽  
The Japanese Archipelago

scholarly journals Evidence of avian-mediated long distance dispersal in American tardigrades

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5035 ◽  
Author(s):  
Matthew J. Mogle ◽  
Scott A. Kimball ◽  
William R. Miller ◽  
Richard D. McKown
Keyword(s):  
Bird Species ◽  
Distribution Patterns ◽  
Long Distance Dispersal ◽  
Long Distance ◽  
Neotropical Migrant ◽  
Grus Canadensis ◽  
Sandhill Crane ◽  
Migrant Birds ◽  
North And South

Terrestrial tardigrades, commonly known as “water bears”, are part of a phylum of microscopic, aquatic invertebrates famous for cryptobiosis and space travel, but little is known about their modes of dispersal on Earth. Wind is assumed, but not truly demonstrated, to be the major method of global dispersal. Yet, some water bear distribution patterns cannot be explained by patterns of prevailing winds. Mammals and birds have been proposed as potential animal vectors. Importantly, most nearctic-neotropical migrant birds move north and south, with many crossing the equator, whereas prevailing winds move west to east or east to west but do not cross the equator. When multiplied by billions of birds over tens of millions of years, if the ectozoochory of tardigrades by birds is true then both regional and intercontinental patterns can be better explained. To test for the potential role of birds in tardigrade dispersal, the nests of 10 species for birds were examined. Seventy percent of nests were positive for tardigrades, demonstrating that some birds are in a position for transference. The carcasses of eight birds (six species) found dead from window strikes and a Sandhill Crane (Grus canadensis) found dead during routine surveys were also examined. Of the birds examined, 66% yielded tardigrades from two classes, three orders, and five species, including juveniles, adults, and eggs, suggesting that many bird species are potential vectors for many species of tardigrades. Our data support the hypothesis of avian-mediated long distance dispersal of tardigrades and provide evidence that further investigation is warranted.

scholarly journals Annual variation in long-distance dispersal driven by breeding and non-breeding season climatic conditions in a migratory bird

Ecography ◽  
2015 ◽  
Vol 38 (10) ◽  
pp. 1006-1014 ◽  
Author(s):  
Clark S. Rushing ◽  
Michele R. Dudash ◽  
Colin E. Studds ◽  
Peter P. Marra
Keyword(s):  
Breeding Season ◽  
Annual Variation ◽  
Migratory Bird ◽  
Climatic Conditions ◽  
Long Distance Dispersal ◽  
Long Distance

scholarly journals Migrating curlews on schedule: departure and arrival patterns of a long-distance migrant depend on time and breeding location rather than on wind conditions

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Philipp Schwemmer ◽  
Moritz Mercker ◽  
Klaus Heinrich Vanselow ◽  
Pierrick Bocher ◽  
Stefan Garthe
Keyword(s):  
Bird Species ◽  
Weather Conditions ◽  
Migratory Bird ◽  
Long Distance ◽  
Timing Of Migration ◽  
Weather Parameters ◽  
Spatio Temporal ◽  
Breeding Location ◽  
Departure Decisions ◽  
Selection Operator

Abstract Background Departure decisions in long-distance migratory bird species may depend on favourable weather conditions and beneficial resources at the destination location, overarched by genetic triggers. However, few studies have tried to validate the significance of these three concepts simultaneously, and long-term, high-resolution tagging datasets recording individual movements across consecutive years are scarce. We used such a dataset to explore intraspecific and intra-individual variabilities in departure and arrival decisions from/to wintering grounds in relation to these three different concepts in bird migration. Methods We equipped 23 curlews (Numenius arquata) wintering in the Wadden Sea with Global Positioning System data loggers to record their spatio-temporal patterns of departure from and arrival at their wintering site, and the first part of their spring migration. We obtained data for 42 migrations over 6 years, with 12 individuals performing repeat migrations in consecutive years. Day of year of departure and arrival was related to 38 meteorological and bird-related predictors using the least absolute shrinkage and selection operator (LASSO) to identify drivers of departure and arrival decisions. Results Curlews migrated almost exclusively to Arctic and sub-Arctic Russia for breeding. They left their wintering site mainly during the evening from mid- to late April and returned between the end of June and mid-July. There was no difference in departure times between the sexes. Weather parameters did not impact departure decisions; if departure days coincided with headwind conditions, the birds accounted for this by flying at higher altitudes of up to several kilometres. Curlews breeding further away in areas with late snowmelt departed later. Departures dates varied by only < 4 days in individual curlews tagged over consecutive years. Conclusions These results suggest that the trigger for migration in this long-distance migrant is largely independent of weather conditions but is subject to resource availability in breeding areas. The high intra-individual repeatability of departure days among subsequent years and the lack of relationship to weather parameters suggest the importance of genetic triggers in prompting the start of migration. Further insights into the timing of migration in immatures and closely related birds might help to further unravel the genetic mechanisms triggering migration patterns.

scholarly journals Migrating Curlews on Schedule: Departure and Arrival Patterns of a Long-Distance Migrant Depend on Time Rather than on Wind Conditions

2020 ◽  
Author(s):  
Philipp Schwemmer ◽  
Moritz Mercker ◽  
Klaus Heinrich Vanselow ◽  
Pierrick Bocher ◽  
Stefan Garthe
Keyword(s):  
Wadden Sea ◽  
Bird Species ◽  
Weather Conditions ◽  
Internal Clock ◽  
Migratory Bird ◽  
Long Distance ◽  
Breeding Sites ◽  
Timing Of Migration ◽  
Spatio Temporal ◽  
Selection Operator

Abstract Background: Choosing the appropriate time to depart for spring migration is crucial to achieving a successful subsequent breeding season among migratory bird species. We expected Eurasian Curlews (Numenius arquata) to start their migration during favourable weather conditions and to adjust their flight heights to prevailing wind conditions.Methods: We equipped 23 curlews with Global Positioning System data loggers to record the spatio-temporal patterns of their departure from and arrival at their wintering site in the Wadden Sea, as well as the first part of their migration. We obtained data for 42 curlew migrations over a period of 6 years. Departure and arrival dates were related to 73 meteorological and bird-related predictors using the least absolute shrinkage and selection operator (LASSO) to identify drivers of departure and arrival decisions.Results: Curlews migrated almost exclusively to the western part of Russia for breeding. They left the Wadden Sea mainly during the evening hours from mid- to late April and returned between the end of June and mid-July. There was no difference in departure times between the sexes, but males tended to return from their breeding sites later than females. Flight speeds of the birds increased significantly with increasing tailwind component, suggesting that they timed their migration according to favourable wind conditions. However, curlews left the Wadden Sea during various wind and weather conditions, with significant numbers leaving during headwind conditions, in contrast to the apparent wind-driven start of migration. Curlews migrated at very low altitudes during tailwind conditions, but flew significantly higher during headwind conditions, at altitudes of up to several kilometres. Departure dates varied by <4 days in individual curlews that were tagged over consecutive years. Conclusions: Our results suggest that the start of migration in a long-distance migrant mainly depends on the date and is independent of weather conditions. Given the high repeatability of the departure day among subsequent years, this clearly suggests the existence of an internal clock prompting the start of migration. Further insights into the timing of migration in immatures and closely related birds might help us to understand the genetic mechanisms triggering temporal migration patterns.

Migration and Staging Patterns of the Wryneck (Jynx Torquilla) at Eilat, Israel

2011 ◽  
Vol 57 (3) ◽  
pp. 247-256 ◽  
Author(s):  
Reuven Yosef ◽  
Piotr Zduniak
Keyword(s):  
Body Condition ◽  
Bird Species ◽  
Condition Index ◽  
Migratory Bird ◽  
The Body ◽  
Body Condition Index ◽  
Migration Routes ◽  
Long Distance ◽  
Stopover Site ◽  
The Mean

The wryneck is an unusual representative of PalearcticPicidaein that it is a long-distance migrant, whose populations have declined across Europe in the last century. Israel is at the eastern extremes of the known wryneck migration routes in the spring, which are little studied. Hence, we studied the species migration patterns and staging at Eilat, the southern tip of Israel being a very important stopover site for many migratory bird species. During 28 springs and 25 autumn migration seasons in the years 1983-2010, a total of 588 wrynecks were trapped.The mean number of birds recorded per spring season was 18.32 (SE = 2.12) and only 3.00 ± 0.71 per autumn season. The analysis performed for spring passage showed that the mean proportion of juveniles to all birds to which ages were assigned was 48.9 ± 5.2%. Furthermore, we did not find any differences in the dates of ringing, wing length, body mass or body condition index of juvenile and adults. We retrapped 97 (18.9%) wrynecks during the spring. The average proportion retrapped per season was 18.3 ± 2.9% and the average stopover was 4.8 ± 0.4 days. Recaptured birds were in better body condition than at first capture, and the body condition index gained significantly during their stay at the stopover site. The low conservation priority accorded to these habitats — and ignored in spite of many studies from the reagion — highlights the importance of the preservation of priority areas such that avian and other migrations can continue with minimal human impact.

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