L. J. Saint-Louis, J. M. Paul, W. Célestin, D. Beaune, F. Cézilly
Abstract. Information on resident and wintering waterbirds in Haiti is particularly scarce, limiting knowledge needed to inform waterbird conservation across the Caribbean. Here, results from a winter census of waterbirds at five major wetland sites in Haiti in 2019 are presented. Overall, 10,265 waterbirds belonging to 34 species and 12 families were counted. Richness per site varied between 8 and 26 species, and the Shannon diversity index ranged from 2.69 to 8.54. Only 17.6% of observed species were recorded at more than three sites, and there was no significant relationship between the overall number of individuals counted per species and the number of sites where the species was observed. This was reflected in the moderate degree of similarity between the five sites in terms of shared species as calculated with Horn index. Although the species observed during the survey are currently listed as Least Concern (LC) in the Global IUCN Red List, at the local level several of them are considered threatened: White-cheeked Pintail (Anas bahamensis) and American Coot (Fulica americana); or rare: Mallard (Anas platyrhynchos) and Wilson's Phalarope (Phalaropus tricolori). Results are discussed relative to previous records of waterbirds in Haiti and need to develop ornithological research based on local expertise.
{"title":"A Baseline Survey of Waterbirds in Five Major Wetlands of Haiti","authors":"L. J. Saint-Louis, J. M. Paul, W. Célestin, D. Beaune, F. Cézilly","doi":"10.1675/063.044.0312","DOIUrl":"https://doi.org/10.1675/063.044.0312","url":null,"abstract":"Abstract. Information on resident and wintering waterbirds in Haiti is particularly scarce, limiting knowledge needed to inform waterbird conservation across the Caribbean. Here, results from a winter census of waterbirds at five major wetland sites in Haiti in 2019 are presented. Overall, 10,265 waterbirds belonging to 34 species and 12 families were counted. Richness per site varied between 8 and 26 species, and the Shannon diversity index ranged from 2.69 to 8.54. Only 17.6% of observed species were recorded at more than three sites, and there was no significant relationship between the overall number of individuals counted per species and the number of sites where the species was observed. This was reflected in the moderate degree of similarity between the five sites in terms of shared species as calculated with Horn index. Although the species observed during the survey are currently listed as Least Concern (LC) in the Global IUCN Red List, at the local level several of them are considered threatened: White-cheeked Pintail (Anas bahamensis) and American Coot (Fulica americana); or rare: Mallard (Anas platyrhynchos) and Wilson's Phalarope (Phalaropus tricolori). Results are discussed relative to previous records of waterbirds in Haiti and need to develop ornithological research based on local expertise.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"69 1","pages":"370 - 375"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90602938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Paruk, Hannah R. Uher-Koch, Kristin A. Kovach, A. Byrd, Adrienne Dolley, C. Cray, J. Hernandez, N. Stacy
Abstract. Common Loons (Gavia immer) are migratory, piscivorous waterbirds that exhibit high wintering site fidelity. Forty-three immature loons were captured in 2013, 2015–2017, in southwest coastal Louisiana, an area moderately to heavily exposed to oil from the Deepwater Horizon oil spill of 2010. We analyzed blood from loons to examine associations between exposure to polycyclic aromatic hydrocarbons (PAH) and 25 blood analytes. Overall, 60% (26/43) of the loons had detectable concentrations of PAHs, with an average concentration of 55.3 ± 10.3 ng/g. After controlling for body weight, loons with detectable blood PAHs had higher concentrations of absolute eosinophils, lymphocytes, or monocytes compared to loons without PAH exposure. This study provides evidence of subclinical inflammation in Common Loons wintering in coastal Louisiana and identifies exposure to PAHs as a stressor, raising concern for potential impaired fitness in this population resulting from low-level exposure to PAHs.
{"title":"Evidence of Subclinical Inflammation Relates to PAH Exposure in Overwintering Common Loons (Gavia immer)","authors":"J. Paruk, Hannah R. Uher-Koch, Kristin A. Kovach, A. Byrd, Adrienne Dolley, C. Cray, J. Hernandez, N. Stacy","doi":"10.1675/063.044.0306","DOIUrl":"https://doi.org/10.1675/063.044.0306","url":null,"abstract":"Abstract. Common Loons (Gavia immer) are migratory, piscivorous waterbirds that exhibit high wintering site fidelity. Forty-three immature loons were captured in 2013, 2015–2017, in southwest coastal Louisiana, an area moderately to heavily exposed to oil from the Deepwater Horizon oil spill of 2010. We analyzed blood from loons to examine associations between exposure to polycyclic aromatic hydrocarbons (PAH) and 25 blood analytes. Overall, 60% (26/43) of the loons had detectable concentrations of PAHs, with an average concentration of 55.3 ± 10.3 ng/g. After controlling for body weight, loons with detectable blood PAHs had higher concentrations of absolute eosinophils, lymphocytes, or monocytes compared to loons without PAH exposure. This study provides evidence of subclinical inflammation in Common Loons wintering in coastal Louisiana and identifies exposure to PAHs as a stressor, raising concern for potential impaired fitness in this population resulting from low-level exposure to PAHs.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"17 1","pages":"317 - 323"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85184931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Fernando, S. Kotagama, Anthony R. Rendall, M. Weston
Abstract. Pheasant-tailed Jacana (Hydrophasianus chirurgus) have a polyandrous mating system, with females defending larger territories within which males compete for and defend smaller territories. The role of the sexes in territorial defense is therefore potentially complex yet remains poorly known. The sex-roles of defensive responses to intruders were monitored at Anawilundawa Ramsar site, North-Western Province, Sri Lanka, where birds encountered conspecifics and other potential predators: Purple Coots (Porphyrio porphyrio), aerial predators, and other waterbirds. Females contributed to defense, though males performed most defense. Females increased their propensity to defend as breeding progressed; by the chick-rearing phase defense was shared more or less equitably between the sexes. Females were more likely to defend against aerial predators than males, and males were more likely to defend against conspecifics than they were to other intruders. When defending against conspecifics, most male defense was directed at intruding males, and most female defense at intruding females. Defense in this polyandrous species relied on cooperation between the sexes but also on some defense specialization whereby females focussed on defending against aerial predators and conspecific females, perhaps because of their larger body size. Both female and male Pheasant-tailed Jacanas therefore contribute to parental care via their defensive activities.
{"title":"Defense of Eggs and Chicks in the Polyandrous Pheasant-Tailed Jacana (Hydrophasianus chirurgus) in Sri Lanka: Sex-Roles, Stage of Breeding, and Intruder Type","authors":"C. Fernando, S. Kotagama, Anthony R. Rendall, M. Weston","doi":"10.1675/063.044.0311","DOIUrl":"https://doi.org/10.1675/063.044.0311","url":null,"abstract":"Abstract. Pheasant-tailed Jacana (Hydrophasianus chirurgus) have a polyandrous mating system, with females defending larger territories within which males compete for and defend smaller territories. The role of the sexes in territorial defense is therefore potentially complex yet remains poorly known. The sex-roles of defensive responses to intruders were monitored at Anawilundawa Ramsar site, North-Western Province, Sri Lanka, where birds encountered conspecifics and other potential predators: Purple Coots (Porphyrio porphyrio), aerial predators, and other waterbirds. Females contributed to defense, though males performed most defense. Females increased their propensity to defend as breeding progressed; by the chick-rearing phase defense was shared more or less equitably between the sexes. Females were more likely to defend against aerial predators than males, and males were more likely to defend against conspecifics than they were to other intruders. When defending against conspecifics, most male defense was directed at intruding males, and most female defense at intruding females. Defense in this polyandrous species relied on cooperation between the sexes but also on some defense specialization whereby females focussed on defending against aerial predators and conspecific females, perhaps because of their larger body size. Both female and male Pheasant-tailed Jacanas therefore contribute to parental care via their defensive activities.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"34 1","pages":"363 - 369"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90196333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract. Although the River Tern (Sterna aurantia) has been widely distributed across south and southeast Asia, its population is declining and was classified as Vulnerable in the 2020 IUCN Red List of Threatened Species. Insufficient information is available on its breeding ecology. This study reports the breeding ecology and factors affecting breeding of the River Tern over three years (2017-2019) along the Mahanadi River in Odisha, eastern India. Breeding was observed between February and May, with peak activity in April. The mean clutch size was 2.4 ± 0.06 SE and incubation period was 22.1 ± 0.06 days. Out of 163 nests, 68 nests succeeded in hatching at least one egg and apparent nesting success rate varied between 2.6% (2018) and 62.3% (2017). Factors affecting nesting success (95 nests) were predation (37.9%), flooding (32.6%), a cyclone (28.4%) and nest desertion (1.1%). Overall, of 124 chicks hatched, 58 were estimated to have fledged. Factors affecting chick survival were a cyclone (43.9%), predation (39.4%), and unknown causes (16.7%). A cyclone in May 2019 wiped out all eggs and chicks. Development and implementation of an evidence-based multi-species conservation action plan to protect River Tern and other globally threatened riverine ground nesters is urgently required.
{"title":"Population, Breeding Phenology, and Factors Affecting Breeding Success of River Tern (Sterna aurantia) in Eastern India","authors":"Tuhinansu Kar, S. Debata, T. Mundkur","doi":"10.1675/063.044.0305","DOIUrl":"https://doi.org/10.1675/063.044.0305","url":null,"abstract":"Abstract. Although the River Tern (Sterna aurantia) has been widely distributed across south and southeast Asia, its population is declining and was classified as Vulnerable in the 2020 IUCN Red List of Threatened Species. Insufficient information is available on its breeding ecology. This study reports the breeding ecology and factors affecting breeding of the River Tern over three years (2017-2019) along the Mahanadi River in Odisha, eastern India. Breeding was observed between February and May, with peak activity in April. The mean clutch size was 2.4 ± 0.06 SE and incubation period was 22.1 ± 0.06 days. Out of 163 nests, 68 nests succeeded in hatching at least one egg and apparent nesting success rate varied between 2.6% (2018) and 62.3% (2017). Factors affecting nesting success (95 nests) were predation (37.9%), flooding (32.6%), a cyclone (28.4%) and nest desertion (1.1%). Overall, of 124 chicks hatched, 58 were estimated to have fledged. Factors affecting chick survival were a cyclone (43.9%), predation (39.4%), and unknown causes (16.7%). A cyclone in May 2019 wiped out all eggs and chicks. Development and implementation of an evidence-based multi-species conservation action plan to protect River Tern and other globally threatened riverine ground nesters is urgently required.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"1 1","pages":"308 - 316"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89879546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Delip K. Das, Naim Khandakar, Irin Sultana, M. Shamsuddoha, Ashik Jahan Galib, Farhana Akhtar, T. Piersma
Abstract. Bangladesh hosts most of what is left of Indian Skimmer (Rhynchops albicollis) populations, a globally endangered species. Each October-March from 2015-2020, 21 surveys of nonbreeding birds were made in Nijhum Dweep National Park, Bangladesh. High tide or evening roosts were counted from vantage points whenever a buildup or breakdown of skimmer concentrations was noticed, and site use noted by marking all observations of presence and activity on maps. The largest single count was 3,108 skimmers on 18 February 2020, constituting 30-50% of the known global population. Indian Skimmers mostly occurred in Damar Char West and at the tip of the Majher Char. Throughout the day with incoming tide, skimmers moved between preferred roosting areas to forage in the shallows. We describe a unique group-foraging strategy in which skimmers chase fish from deep water to shallow water along the shoreline. Circling high over the tidal channel, the flock of skimmers dives down in unison to just above the water surface, then spreading like a net towards the shore. Raptors caused disturbances to roosting skimmers, and we observed one instance of predation of a skimmer by a White-bellied Sea Eagle (Haliaeetus leucogaster). Human fishing activities disturbed nearshore foraging and shoreline roosting skimmers. We suggest protecting Damar Char West by regulating human activities to minimize disturbance from December to March.
{"title":"Population Size, Behavior and Threats to Indian Skimmers (Rhynchops albicollis) at Their Largest Known Wintering Site","authors":"Delip K. Das, Naim Khandakar, Irin Sultana, M. Shamsuddoha, Ashik Jahan Galib, Farhana Akhtar, T. Piersma","doi":"10.1675/063.044.0314","DOIUrl":"https://doi.org/10.1675/063.044.0314","url":null,"abstract":"Abstract. Bangladesh hosts most of what is left of Indian Skimmer (Rhynchops albicollis) populations, a globally endangered species. Each October-March from 2015-2020, 21 surveys of nonbreeding birds were made in Nijhum Dweep National Park, Bangladesh. High tide or evening roosts were counted from vantage points whenever a buildup or breakdown of skimmer concentrations was noticed, and site use noted by marking all observations of presence and activity on maps. The largest single count was 3,108 skimmers on 18 February 2020, constituting 30-50% of the known global population. Indian Skimmers mostly occurred in Damar Char West and at the tip of the Majher Char. Throughout the day with incoming tide, skimmers moved between preferred roosting areas to forage in the shallows. We describe a unique group-foraging strategy in which skimmers chase fish from deep water to shallow water along the shoreline. Circling high over the tidal channel, the flock of skimmers dives down in unison to just above the water surface, then spreading like a net towards the shore. Raptors caused disturbances to roosting skimmers, and we observed one instance of predation of a skimmer by a White-bellied Sea Eagle (Haliaeetus leucogaster). Human fishing activities disturbed nearshore foraging and shoreline roosting skimmers. We suggest protecting Damar Char West by regulating human activities to minimize disturbance from December to March.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"38 1","pages":"382 - 388"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80570594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. U. Haq, A. Rahmani, B. Bhat, K. Ahmad, Sabeehah Rehman
Abstract. This study aims to describe the breeding biology of Ibisbill (Ibidorhyncha struthersii), a poorly studied wader nesting on the River Sindh in Kashmir Himalayan region of India. A total of 16 nests were monitored during the breeding seasons (late February to late July) of Ibisbill in 2018 and 2019. Nest building was completed in 21-28 days on bare ground by tossing small pebbles into a shallow depression that had no special markings to the human eye (mean pebble size = 4.09 mm ± 1.26 SD x 6.23 ± 3.71 mm, n = 42). Nests measured 28.45 ± 1.75 cm × 18.91 ± 0.99 cm (n = 12). Eggs were laid in the first week of April with clutch size ranging from 2 to 4 eggs. Eggs were 50.58 ± 1.07 mm in length and 36.77 ± 0.85 mm in breadth (n = 5), with egg shape index of 72.23 ± 2.58 (range: 69.23 to 76.42). Incubation lasted 28-32 days, with 3 out of 19 observable eggs successfully hatched (15.79% hatching success). Fledging success was zero due to predation. Defensive behavior was directly observed for 16 nesting pairs during two breeding seasons. A total of 407 defensive incidents were recorded during incubation and chick stage, with both parents engaging in defense together and individually.
摘要本研究旨在描述在印度克什米尔喜马拉雅地区信德河上筑巢的一种研究较少的涉水鸟Ibisbill (Ibidorhyncha struthersii)的繁殖生物学。在2018年和2019年的繁殖季节(2月下旬至7月下旬)，对16个鸟巢进行了监测。巢的建造在21-28天内完成，在裸地上，通过将小鹅卵石扔进人眼没有特殊标记的浅洼地(平均鹅卵石尺寸= 4.09 mm±1.26 SD x 6.23±3.71 mm, n = 42)。巢的尺寸为28.45±1.75 cm × 18.91±0.99 cm (n = 12)。4月第一周产蛋，窝数2 ~ 4个。卵长50.58±1.07 mm，宽36.77±0.85 mm (n = 5)，卵形指数为72.23±2.58(范围:69.23 ~ 76.42)。孵化期28 ~ 32 d，观察到的虫卵19枚，孵化成功3枚，孵化成功率15.79%。由于被捕食，雏鸟的成活率为零。在两个繁殖季节，直接观察了16对筑巢鸟的防御行为。在孵化期和雏鸟阶段共记录了407起防御事件，父母双方共同或单独进行防御。
{"title":"Breeding Biology of Ibisbill (Ibidorhyncha struthersii) in the Kashmir Himalayan Region of India","authors":"I. U. Haq, A. Rahmani, B. Bhat, K. Ahmad, Sabeehah Rehman","doi":"10.1675/063.044.0310","DOIUrl":"https://doi.org/10.1675/063.044.0310","url":null,"abstract":"Abstract. This study aims to describe the breeding biology of Ibisbill (Ibidorhyncha struthersii), a poorly studied wader nesting on the River Sindh in Kashmir Himalayan region of India. A total of 16 nests were monitored during the breeding seasons (late February to late July) of Ibisbill in 2018 and 2019. Nest building was completed in 21-28 days on bare ground by tossing small pebbles into a shallow depression that had no special markings to the human eye (mean pebble size = 4.09 mm ± 1.26 SD x 6.23 ± 3.71 mm, n = 42). Nests measured 28.45 ± 1.75 cm × 18.91 ± 0.99 cm (n = 12). Eggs were laid in the first week of April with clutch size ranging from 2 to 4 eggs. Eggs were 50.58 ± 1.07 mm in length and 36.77 ± 0.85 mm in breadth (n = 5), with egg shape index of 72.23 ± 2.58 (range: 69.23 to 76.42). Incubation lasted 28-32 days, with 3 out of 19 observable eggs successfully hatched (15.79% hatching success). Fledging success was zero due to predation. Defensive behavior was directly observed for 16 nesting pairs during two breeding seasons. A total of 407 defensive incidents were recorded during incubation and chick stage, with both parents engaging in defense together and individually.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"8 1","pages":"356 - 632"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73097320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Brzorad, M. C. Allen, S. Jennings, E. Condeso, S. Elbin, R. Kays, David C. Lumpkin, S. Schweitzer, N. Tsipoura, A. Maccarone
Abstract. In an effort to quantify the value of wetland habitats, GPS technology was used to document the movement patterns of 16 Great Egrets (Ardea alba) in North America. Patterns in daily flight distances and utilization distributions (UD; estimates of area occupied on the ground) were documented throughout the annual cycle. Maximum Daily Displacement (MDD), the farthest distance occupied by a bird from colony/roost (central place) in 24 hr was greatest (4.3 ± 0.1 km) during breeding season and lowest (3.3 ± 0.1) during post-breeding season. As birds visited multiple foraging sites and made multiple round trips to central places, this Total Daily Distance (TDD) was also measured. It increased from a mean of about 12 km during the incubation phase to about 35 km at the time of fledging. Average TDD was greatest during breeding season (14.2 ± 0.3 km) and lowest during winter (11.0 ± 0.2 km). The utilization distribution increased from 128 (± 21.3) ha during breeding season to 179 (±32.6) ha during winter. Birds that foraged at tidal sites used 183.3 (± 22.2) ha, twice as much area as birds that foraged strictly in freshwater sites (89.6 ± 21.3 ha).
{"title":"Seasonal Patterns in Daily Flight Distance and Space Use by Great Egrets (Ardea alba)","authors":"J. Brzorad, M. C. Allen, S. Jennings, E. Condeso, S. Elbin, R. Kays, David C. Lumpkin, S. Schweitzer, N. Tsipoura, A. Maccarone","doi":"10.1675/063.044.0309","DOIUrl":"https://doi.org/10.1675/063.044.0309","url":null,"abstract":"Abstract. In an effort to quantify the value of wetland habitats, GPS technology was used to document the movement patterns of 16 Great Egrets (Ardea alba) in North America. Patterns in daily flight distances and utilization distributions (UD; estimates of area occupied on the ground) were documented throughout the annual cycle. Maximum Daily Displacement (MDD), the farthest distance occupied by a bird from colony/roost (central place) in 24 hr was greatest (4.3 ± 0.1 km) during breeding season and lowest (3.3 ± 0.1) during post-breeding season. As birds visited multiple foraging sites and made multiple round trips to central places, this Total Daily Distance (TDD) was also measured. It increased from a mean of about 12 km during the incubation phase to about 35 km at the time of fledging. Average TDD was greatest during breeding season (14.2 ± 0.3 km) and lowest during winter (11.0 ± 0.2 km). The utilization distribution increased from 128 (± 21.3) ha during breeding season to 179 (±32.6) ha during winter. Birds that foraged at tidal sites used 183.3 (± 22.2) ha, twice as much area as birds that foraged strictly in freshwater sites (89.6 ± 21.3 ha).","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"91 1","pages":"343 - 355"},"PeriodicalIF":0.3,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90404746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Instructions for Contributors to Waterbirds","authors":"","doi":"10.1675/063.044.0115","DOIUrl":"https://doi.org/10.1675/063.044.0115","url":null,"abstract":"","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"6 1","pages":"125 - 134"},"PeriodicalIF":0.3,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77610714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Critique of Albores-Barajas et al. (2020) on Establishing Seabird Conservation Needs in Northwestern Mexico","authors":"J. A. Castillo‐Guerrero, E. Mellink, G. Fernández","doi":"10.1675/063.044.0113","DOIUrl":"https://doi.org/10.1675/063.044.0113","url":null,"abstract":"","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"356 1","pages":"115 - 120"},"PeriodicalIF":0.3,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77157619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zhang Ming-Ming, Hu Can-Shi, Sun Xi-jiao, Suo Hai-jun
Abstract. Wintering Black-necked (Grus nigricollis) and Common (G. grus) cranes occur sympatrically in Caohai Wetland, Guizhou, China. Seasonal migration dynamics, daily movement patterns, and diurnal activity budgets of the two crane species were investigated in Caohai Wetland, in order to characterize their wintering activity differences and the mechanism of interspecific coexistence, during October - April 2014 - 2017. Black-necked Cranes wintered in Caohai for 147 ± 8 days, and Common Cranes for 169 ± 8 days. Common Cranes generally arrived in Caohai 11.4 ± 3.28 days earlier and departed 11.00 ± 3.20 days later than Black-necked Cranes. During winter in Caohai Wetland, the behavioral activities of both the Black-necked and Common cranes were strongly influenced by circadian rhythms. However, there were significant differences in daily temporal patterns between them in percent time spent in specific behaviors. Common Cranes left their roosting sites 20 min. earlier than Black-necked Cranes and returned 32 min. later. Common Cranes also spent more time foraging and being vigilant than Black-necked Cranes.
{"title":"Seasonal Migration and Daily Movement Patterns of Sympatric Overwintering Black-Necked Cranes (Grus nigricollis) and Common Cranes (Grus grus) in Caohai, Guizhou, China","authors":"Zhang Ming-Ming, Hu Can-Shi, Sun Xi-jiao, Suo Hai-jun","doi":"10.1675/063.044.0203","DOIUrl":"https://doi.org/10.1675/063.044.0203","url":null,"abstract":"Abstract. Wintering Black-necked (Grus nigricollis) and Common (G. grus) cranes occur sympatrically in Caohai Wetland, Guizhou, China. Seasonal migration dynamics, daily movement patterns, and diurnal activity budgets of the two crane species were investigated in Caohai Wetland, in order to characterize their wintering activity differences and the mechanism of interspecific coexistence, during October - April 2014 - 2017. Black-necked Cranes wintered in Caohai for 147 ± 8 days, and Common Cranes for 169 ± 8 days. Common Cranes generally arrived in Caohai 11.4 ± 3.28 days earlier and departed 11.00 ± 3.20 days later than Black-necked Cranes. During winter in Caohai Wetland, the behavioral activities of both the Black-necked and Common cranes were strongly influenced by circadian rhythms. However, there were significant differences in daily temporal patterns between them in percent time spent in specific behaviors. Common Cranes left their roosting sites 20 min. earlier than Black-necked Cranes and returned 32 min. later. Common Cranes also spent more time foraging and being vigilant than Black-necked Cranes.","PeriodicalId":54408,"journal":{"name":"Waterbirds","volume":"74 1","pages":"167 - 174"},"PeriodicalIF":0.3,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83991085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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