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85 results for “high-latitude”
Data from: Jeju Island: a sentinel for tracking ocean warming impacts on high-latitude benthic communities
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Data from: Assessing the effects of human activities on the foraging opportunities of migratory shorebirds in Austral high-latitude bays
Human presence at intertidal areas could impact coastal biodiversity, including migratory waterbird species and the ecosystem services they provide. Assessing this impact is therefore essential to develop management measures compatible with migratory processes and associated biodiversity. Here, we assess the effects of human presence on the foraging opportunities of Hudsonian godwits (Limosa haemastica, a trans-hemispheric migratory shorebird) during their non-breeding season on Chiloé Island, southern Chile. We compared bird density and time spent foraging in two similar bays with contrasting disturbance levels: human presence (mostly seaweed harvesters accompanied by dogs) was on average 0.9±0.4 people per 10 ha in the disturbed bay, whereas it was negligible (95% days absent) in the non-disturbed bay. Although overall abundances were similar between bays, godwit density was higher in the non-disturbed bay throughout the low tide period. Both days after the start of the non-breeding season and tidal height significantly affected godwit density, with different effects in either bay. Time spent foraging was significantly higher in the non-disturbed bay (86.5±1.1%) than in the disturbed one (81.3±1.4%). As expected, godwit density significantly decreased with the number of people and accompanying dogs in the disturbed bay. Our results indicate that even a low density of people and dogs can significantly reduce the foraging opportunities of shorebirds. These constraints, coupled with additional flushing costs, may negatively affect godwits' pre-migratory fattening. Hence, as a first step we suggest limiting human presence within bays on Chiloé to 1 person per 10 ha and banning the presence of accompanying dogs in sensitive conservation areas.
Data from: Birth dates vary with fixed and dynamic maternal features, offspring sex, and extreme climatic events in a high-latitude marine mammal
Reproductive synchrony tends to be widespread in diverse species of plants and animals, especially at higher latitudes. However, for long-lived mammals, birth dates for different individuals can vary by weeks within a population. A mother's birth timing can reveal useful information about her reproductive abilities and have important implications for the characteristics and survival of her offspring. Despite this, our current knowledge of factors associated with variation in birth dates is modest. We used long-term data for known-age Weddell seals in Antarctica and a Bayesian hierarchical modeling approach to study how birth dates varied with fixed and temporally varying features of mothers, whether sex allocation varied with birth timing, and annual variation in birth dates. Based on birth dates for 4465 pups born to 1117 mothers aged 4–31, we found that diverse features of mothers were associated with variation in birth dates. Maternal identity was the most important among these. Unlike most studies, which have reported that birth dates occur earlier as mothers age, we found that birth dates progressively occurred earlier in the year in the early part of a mother's reproductive life, reached a minimum at age 16, and then occurred later at later ages. Birth dates were positively related to a mother's age at primiparity and recent reproductive effort. The earliest birth dates were for pups born to prime-age mothers who did not reproduce in the previous year but began reproduction early in life, suggesting that females in the best condition gave birth earlier than others. If so, our finding that male pups tended to be born earlier than females provides support for the Trivers–Willard sex-allocation model. Average birth dates were quite consistent across years, except for 2 years that had notable delays and occurred during the period when massive icebergs were present and disrupted the ecosystem.
FIGURE 16. Pillsburiaster aoteanus USNM 1100852. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 16. Pillsburiaster aoteanus USNM 1100852. A. Abactinal surface. B. Close up of granules on abactinal surface. C. Actinal (or oral) surface. D. Lateral side showing marginal plate series (abactinal facing and superomarginals to the left). Scale Bar= 0.5 cm.
FIGURE 15 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 15. Pergamaster triseriatus. (USNM 1120478) A. Abactinal surface. B. Abactinal surface showing carinal series along arm and superomarginal plates. C. Lateral side showing madreporite, supero- and inferomarginal plate series. D. Oral surface showing furrow spines. E. Abactinal surface of small specimen. F. Actinal surface of small specimen. Scale Bar= 0.5 cm.
FIGURE 10. Eratosaster jennae n in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 10. Eratosaster jennae n. sp. Holotype. USNM 1149358 A. Abactinal surface. B. Abactinal-lateral surface showing spines and superomarginal series. C. Actinal surface and oral region. D. Armtip showing superomarginals abutted along midline. Scale Bar=0.5 cm.
FIGURE 7 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 7. Chitonaster trangae nov. sp.. Holotype USNM E13585. A. Abactinal Surface.. B. Actinal surface. USNM 1121466 C. Granules on abactinal arm surface. USNM E13503. D. Coelomic view of abactinal plates showing papular pores.. USNM E50555-E. Lateral view of marginal plates and abactinal spines. F. Abactinal spines and plate variation. Scale Bar = 0.5 cm.
FIGURE 4. Chitonaster cataphracus USNM 1122200 A. Abactinal surface. USNM 1122198. B. Oral surface. C. Dorsolateral surface showing marginal plate series. D in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 4. Chitonaster cataphracus USNM 1122200 A. Abactinal surface. USNM 1122198. B. Oral surface. C. Dorsolateral surface showing marginal plate series. D. Abactinal plate surface on arm showing irregular marginal plate series. E. Close-up of abactinal plates showing absence of papulae. Scale Bar= 0.5 cm.
FIGURE 11. Hippasteria phrygiana USNM E13586. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 11. Hippasteria phrygiana USNM E13586. A. Abactinal surface. B. Abactinal-lateral surface showing spines and marginal plate series. C. Pedicellariae from actinal surface. D. Actinal surface. Scale Bar= 0.5 cm.
FIGURE 12. Lithosoma novaezelandiae. USNM 1100883. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 12. Lithosoma novaezelandiae. USNM 1100883. A. Abactinal surface. B. Close up of abactinal plates and madreporite. C. Lateral view of marginal plate series. D. Actinal surface. Scale Bar= 0.5 cm.
FIGURE 2. Ceramaster patagonicus USNM 1122413. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 2. Ceramaster patagonicus USNM 1122413. A. Abactinal surface. B. (inset) Madreporite and close-up of abactinal plates. C. Lateral view-Superomarginal and inferomarginal plates (top series and bottom series respectively). D. Pedicellariae on marginal plates. E. Tube foot groove and furrow spines. F. Actinal surface. USNM 1121285. G. Penultimate superomarginals on smaller specimen. Scale Bar= 0.5 cm.
FIGURE 1. Ceramaster patagonicus australis. USNM 1121579. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 1. Ceramaster patagonicus australis. USNM 1121579. A. Abactinal surface. B. Close-up of abactinal plates. C. Close-up of armtip showing superomarginal plate series. D. Actinal surface. E. Close-up of actinal surface showing mouth and furrow spination. Scale Bar = 0.5 cm.
FIGURE 9 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 9. Cladaster analogus. "small form" USNM 1116312. A. Abactinal surface. B. Close-up of abactinal plates and granules. C. Actinal surface. D. Armtip showing penultimate superomarginal plates. Scale Bar = 0.5 cm.
FIGURE 18. Sphaeridiscus mirabilis. USNM 1116242. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 18. Sphaeridiscus mirabilis. USNM 1116242. A. Abactinal surface. B. Close up of abactinal plates. C. Actinal surface. D. Close up of penultimate superomarginals not enlarged in smaller specimen. CASIZ 174584. E. Penultimate superomarginal enlarged.
FIGURE 6. Chitonaster johannae. USNM E13501. A in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 6. Chitonaster johannae. USNM E13501. A. (inset) Coelomic view of abactinal surface showing overlapping plates with papular pores absent. USNM 1018953 B. Abactinal surface. C. Close up of abactinal surface showing granules and pedicellariae. D. Abactinal view of armtip showing rows of spines/granules. E. Actinal surface. F. Lateral view showing marginal plate series. USNM E13501.G. Close up of actinal intermediate and furrow area with trivalve pedicellariae. Scale Bar= 0.5 cm.
FIGURE 8 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 8. Cladaster analogus "big form" USNM 1091176. A. Abactinal surface. B. Close-up of abactinal plates. C. Actinal surface. D. Lateral view of superomarginal and inferomarginal plates.
FIGURE 5. Chitonaster felli. USNM 1018861. A. Abactinal surface. B. Actinal surface. C.Marginal plate series. D in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 5. Chitonaster felli. USNM 1018861. A. Abactinal surface. B. Actinal surface. C.Marginal plate series. D. Close-up of enlarged pedicellariae on actinal intermediate surface. Scale Bar = 0.5 cm.
FIGURE 17. Pillsburiaster calvus n in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 17. Pillsburiaster calvus n. sp. Holotype. USNM 1149357. A. Abactinal surface. B. (inset) Closeup of abactinal surface. C. Abactinal surface of armtip. D. Lateral side showing marginal plates. E. Actinal surface.Scale Bar=0.5 cm.
FIGURE 14 in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 14. Pergamaster incertus (USNM 1081793) A. Abactinal surface. B. (inset) Close up of abactinal plates and madreporite. C. Abactinal view of arm showing superomarginals not abutted. D. Actinal surface and furrow spines. E. Lateral view of marginal plate series. USNM E13415 (ex. P. synaptorus) F. Abactinal arm showing abutted superomarginals over midline. Scale Bar= 0.5 cm.
FIGURE 13. Notioceramus anomalus. USNM E13723. A. Abactinal surface. B in Taxonomy of high-latitude Goniasteridae (Subantarctic & Antarctic): one new genus, and three new species with an overview and key to taxa
FIGURE 13. Notioceramus anomalus. USNM E13723. A. Abactinal surface. B. Close-up of abactinal granules. C. Actinal surface. D. Lateral view of superomarginals and inferomarginals.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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