Environmental habitat use and migration of Plecoglossidae and Osmeridae fish

The life histories of Plecoglossidae and Osmeridae fish collected from Japanese fresh, brackish, and seawaters were studied by examining the strontium (Sr) to calcium (Ca) ratios in their otoliths. The Sr:Ca ratios in the otoliths changed with the salinity of the habitat. The fish living in a freshwater environment showed consistently low Sr:Ca ratios throughout the otolith. The fish were identified as a standard freshwater type. In contrast, fish collected from the intertidal zone showed higher otolith Sr:Ca ratios than those in the standard freshwater type, and the ratios fluctuated along the growth phase. In the present study, in addition to the representative migration pattern reported previously, other migration patterns were found to show consistently high Sr:Ca ratios throughout the otolith in several Osmeridae fish. Those results indicate that these fish have a flexible migration strategy with a high degree of behavioural plasticity and an ability to utilize the full range of salinity throughout their life history.

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Use of otolith microchemistry to estimate the migratory history of the threespine stickleback, Gasterosteus aculeatus

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315403007008h ◽

2003 ◽

Vol 83 (1) ◽

pp. 223-230 ◽

Cited By ~ 22

Author(s):

Takaomi Arai ◽

Akira Goto ◽

Nobuyuki Miyazaki

Keyword(s):

Life Histories ◽

Gasterosteus Aculeatus ◽

Threespine Stickleback ◽

Migration Strategy ◽

Otolith Sr:Ca Ratios ◽

History Of ◽

Sr:Ca Ratios ◽

Low Levels ◽

Hokkaido Island ◽

Line Analysis

Ontogenic change patterns in otolith Sr:Ca ratios in the threespine stickleback, Gasterosteus aculeatus, collected from Japanese brackish waters and freshwater, were examined by wavelength dispersive X-ray spectrometry on an electron microprobe. Two-dimensional images of the Sr concentration in the otoliths showed a variety of patterns of Sr concentration relative to salinity of habitat in all specimens collected in Hokkaido Island. Otolith Sr:Ca ratios in line analysis of all specimens collected in Hokkaido Island fluctuated strongly during the life history transect in accordance with the migration (habitat) pattern from sea to freshwater, via brackish water. In contrast, the Sr concentration or the Sr:Ca ratios of the Otsuchi River stickleback remained at consistently low levels throughout the otolith (1·5×10−3 in the Sr:Ca ratios). The higher ratios (3·2–6·3×10−3) in sticklebacks collected in Hokkaido Island probably reflect the ambient salinity or the seawater–freshwater gradient in Sr concentration. The findings clearly indicated that otolith Sr:Ca ratios reflected individual life histories, and that the stickleback had a flexible migration strategy in the ambient water.

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Use of microsatellite DNA and otolith Sr:Ca ratios to infer genetic relationships and migration history of four morphotypes of Rhinogobius sp. OR

Ichthyological Research ◽

10.1007/s10228-009-0110-5 ◽

2009 ◽

Vol 56 (4) ◽

pp. 373-379 ◽

Cited By ~ 7

Author(s):

Kenichi Ohara ◽

Momoko Hotta ◽

Daisuke Takahashi ◽

Takashi Asahida ◽

Hitoshi Ida ◽

...

Keyword(s):

Microsatellite Dna ◽

Genetic Relationships ◽

Otolith Sr:Ca Ratios ◽

Migration History ◽

History Of ◽

Sr:Ca Ratios ◽

And Migration

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The Use of Nocturnal Flights for Barrier Crossing in a Diurnally Migrating Songbird: Implications for Our Understanding of Fly-and-Forage Migration Strategies

10.21203/rs.3.rs-133338/v1 ◽

2020 ◽

Author(s):

Christie D. Lavallée ◽

Saeedeh Bani Assadi ◽

Alicia M. Korpach ◽

James D. Ray ◽

Jason D Fischer ◽

...

Keyword(s):

Open Water ◽

Gps Tracking ◽

Migration Strategy ◽

Barrier Crossing ◽

Migration Patterns ◽

Migration Strategies ◽

The Caribbean ◽

Migratory Movements ◽

High Degree ◽

Circadian Patterns

Abstract Background: The migration patterns of land birds can generally be divided into those species that migrate principally during the day and those that migrate during the night. Some species may show individual plasticity in the use of day or night flight, particularly when crossing large, open-water or desert barriers. However, individual plasticity in circadian patterns of migratory flights in diurnal songbirds that use a fly-and-forage migration strategy has never been investigated. Methods: We used high precision GPS tracking of a diurnal, migratory swallow Purple martin, (Progne subis), to determine whether individuals were flexible in their spring migration strategies to include some night flight, particularly at barrier crossing.Results: We found that individuals made large (sometimes >1000 km), open-water crossings of the Caribbean Sea and the Gulf of Mexico that included the use of night flight. Some birds-initiated barrier crossing flights at night, demonstrating that night flight is not only used to complete barrier crossings but may confer other advantages for diurnal birds. All birds also used some, shorter night flights when making overland flights not associated with barrier crossing. Birds were more likely to initiate water crossings with supportive northward winds, and preliminary data suggest that moonlight may influence nighttime migratory movements.Conclusions: Overall, our results demonstrate an unexpected high degree of individual plasticity in migration strategies on a circadian scale in a ‘diurnal’ songbird and suggest that barrier crossing at night may complement fly-and-forage migration strategies.

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Intergenerational solidarity networks of instrumental and cultural transfers within migrant families in Turkey

Ageing and Society ◽

10.1017/s0144686x99007916 ◽

2000 ◽

Vol 20 (5) ◽

pp. 523-542 ◽

Cited By ~ 16

Author(s):

SIBEL KALAYCIOĞLU ◽

HELGA RITTERSBERGER-TILIÇ

Keyword(s):

Life Histories ◽

Capital City ◽

Intergenerational Solidarity ◽

Three Generations ◽

Migrant Families ◽

Material Goods ◽

Cultural Mores ◽

And Migration ◽

High Degree ◽

Depth Interviews

Over the last fifty years, the pattern of family life in Turkey has been seriously affected by migration. Despite this, there remains a high degree of solidarity typified by transfers of income, material goods and cultural mores between and within family generations. This article is based on the life histories of fifteen migrant families living in Ankara, the capital city of Turkey. In-depth interviews were used to collect information about at least three generations in each family. Information was collected about occupational, educational and migration histories, property ownership, care of dependents, and parent-child relations covering three generations.

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Habitat segregation and migration in tropical anguillid eels, Anguilla bengalensis bengalensis and A. bicolor bicolor

Scientific Reports ◽

10.1038/s41598-020-72788-9 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Takaomi Arai ◽

Inn-Ju Chai ◽

Yoshiyuki Iizuka ◽

Chih-Wei Chang

Keyword(s):

Life History ◽

Habitat Use ◽

Habitat Preferences ◽

Sympatric Species ◽

Peninsular Malaysia ◽

Habitat Segregation ◽

Otolith Sr:Ca Ratios ◽

Sr:Ca Ratios ◽

And Migration ◽

Continental Growth

Abstract Anguillid eels of the genus Anguilla, which have a unique catadromous life history, are widely distributed across many parts of the world. However, little research has been conducted on the behavioural mechanisms of habitat segregation between sympatric species in tropical anguillid eels. To understand the ecological and behavioural mechanisms involved in the life history and migration of tropical anguillid eels, strontium (Sr):calcium (Ca) ratios were examined in otoliths of A. bengalensis bengalensis (41 specimens) and A. bicolor bicolor (130 specimens) collected from ten rivers in northwestern Peninsular Malaysia. The otolith Sr:Ca ratios revealed different habitat use between the two species. The broad range of otolith Sr:Ca ratios and habitat shift found in A. bicolor bicolor suggested that its habitat utilization was opportunistic in environments of varying salinity. A. bicolor bicolor prefers to live in the midstream to downstream areas with tidal influences. A. bengalensis bengalensis, however, was found to only reside in freshwater environments throughout their continental growth. A. bengalensis bengalensis tends to live in upstream area with no tidal influence. Their habitat use, migratory history, and habitat distribution indicate that habitat segregation occurs between the two species, leading to the different habitat preferences in tropical river systems.

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Variability and repeatability of noctule bat migration in Central Europe: evidence for partial and differential migration

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2018.2174 ◽

2018 ◽

Vol 285 (1893) ◽

pp. 20182174 ◽

Cited By ~ 11

Author(s):

Linn S. Lehnert ◽

Stephanie Kramer-Schadt ◽

Tobias Teige ◽

Uwe Hoffmeister ◽

Ana Popa-Lisseanu ◽

...

Keyword(s):

Central Europe ◽

Migratory Behaviour ◽

Natal Philopatry ◽

Differential Migration ◽

Long Distance ◽

Migration Strategy ◽

Migration Patterns ◽

Bat Migration ◽

Source Populations ◽

And Migration

Each year, large numbers of bats move across Europe between their summer and winter areas, yet even though many of them are endangered and legally protected, we are unaware about many aspects of their migratory behaviour. Here, taking Nyctalus noctula as a model species, we used stable hydrogen isotopic values in fur ( δ 2 H f ) as an endogenous marker to shed light on the migratory behaviour of more than 1000 bats from hibernacula across Central Europe. Specifically, we asked the following questions: how flexible is migration in temperate zone bats? Which general migration pattern do noctule bats follow? How repeatable and thus predictable is the migratory behaviour of individuals? Do morphological correlates of migration occur in bats? Our study confirmed that noctule bats engage in partial and female-biased migration across Europe, suggesting the strongest migration pressures for northern populations. Further, we revealed a combination of partial and differential migration patterns with highly variable migration distances which lead to a pronounced mixing of different source populations in hibernacula where mating occurs. Most individuals were consistent in their migration strategy over time, i.e. 86% could be repeatedly assigned to either long-distance or regional origin across years. This is consistent with our finding that the between-individual component explained 84% of the variation in δ 2 H f values, suggesting specialized individual migratory behaviours and a strong natal philopatry. We discovered a positive correlation between forearm length and migration distance and support for sex-specific effects of migration on body condition. Our study elucidated migration patterns over large geographical scales, demonstrating that considerable numbers of migratory bats originating from distant populations depend on hibernacula across Central Europe, calling for international conservation management.

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Advances in Fish Tagging and Marking Technology

Advances in Fish Tagging and Marking Technology ◽

10.47886/9781934874271.ch29 ◽

2012 ◽

Keyword(s):

Growth Rates ◽

Life Histories ◽

River Mouth ◽

Anguilla Anguilla ◽

European Eel ◽

Coastal Site ◽

Otolith Sr:Ca Ratios ◽

Sr:Ca Ratios ◽

The Mean ◽

Fish Tagging

Abstract.—Restocking programs of the European eel Anguilla anguilla have been conducted for nearly one century in Latvia. To evaluate the efficiency of the eel restocking program and reveal the migratory life histories of European eels in Latvian waters, a total of 75 individuals was collected from the mouth of River Daugava (Daugavgrīva, brackish), a nearby lake (Lake Ķīšezers, freshwater), and a coastal site (Mērsrags, brackish). The naturally-recruited eels consisted of two saltwater types: eels that lived in saltwater and did not enter freshwater (SW, 0–7%) and eels that experienced both freshwater and saltwater, referred to as inter-habitat-shifter (IHS, 60–85%). Restocked eels consisted of purely freshwater types (FW, 7–36.7%)without any exposure to saltwater. Average Sr:Ca ratios at the edge of otoliths were different among sites and origins, and corresponded to the salinities of sampling sites. The mean age at first freshwater entry of IHS was 4.8 ± 2.3 years and was similar to previous studies in Lithuania. The growth rates of FW eels in the river mouth and coast were significantly slower than that of IHS eels (p < 0.001 and 0.012). The use of otolith Sr:Ca ratios as a natural mark to distinguish restocked eels here enabled the assessment of restocking efficiency.

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Use of otolith microchemistry to estimate the migratory history of the Russian sturgeon, Acipenser guldenstadti

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315401004465 ◽

2001 ◽

Vol 81 (4) ◽

pp. 709-710 ◽

Cited By ~ 8

Author(s):

Takaomi Arai ◽

Nobuyuki Miyazaki

Keyword(s):

Caspian Sea ◽

Migration Pattern ◽

Russian Sturgeon ◽

Ambient Water ◽

The Caspian Sea ◽

Migration Strategy ◽

Otolith Sr:Ca Ratios ◽

History Of ◽

Sr:Ca Ratios ◽

Transition Points

Ontogenic change patterns in otolith Sr:Ca ratios were examined in the Russian sturgeon, Acipenser guldenstadti in the Caspian Sea. Otolith Sr:Ca ratios fluctuated widely during the life history in accordance with the migration pattern from freshwater to brackish water habitats, i.e. all specimens exhibited a typical anadromous pattern in the ratio. Several specimens had two transition points in otolith Sr:Ca ratios from the low ratios to the high indicating that those specimens had a flexible migration strategy in the ambient water and had the possibility of migrating downstream to the Caspian Sea multiple times after spawning in a freshwater habitat.

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