Waterbirds: The International Journal of Waterbird Biology最新文献

Choice of Daily Flight Routes of Greater White-Fronted Geese: Effects of Power Lines 大白头雁每日飞行路线的选择:输电线的影响

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522075

T. Shimada

引用次数: 10

Are Rice Fields a Suitable Foraging Habitat for Purple Herons during the Breeding Season 稻田是否适合紫鹭在繁殖期觅食

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522081

F. Campos, J. M. Lekuona

引用次数: 22

Absence of Haematozoa in Chicks of Little Egret in the Camargue, Southern France 法国南部卡马格地区小白鹭雏鸟中没有血虫

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522077

C. Tourenq, C. Pin, L. Sacchi, S. Hurtrez-Boussès, Guillaume Bertault, Y. Kayser, Jean-Louis Martin

引用次数: 2

Molt of the Ivory Gull 象牙鸥的蜕皮

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522078

S. Howell

引用次数: 10

Regional Patterns of Wading Bird Productivity in Northeastern U.S. Estuaries 美国东北部河口涉禽生产力的区域格局

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522062

K. Parsons, S. R. Schmidt, A. Matz

{"title":"Regional Patterns of Wading Bird Productivity in Northeastern U.S. Estuaries","authors":"K. Parsons, S. R. Schmidt, A. Matz","doi":"10.2307/1522062","DOIUrl":"https://doi.org/10.2307/1522062","url":null,"abstract":"-We investigated wading bird productivity in four estuaries from Delaware Bay to Boston Harbor in northeastern U.S.A. over the period 1986-1998. To document and characterize reproductive performance of numerically dominant species for use in wildlife and habitat management planning, we recorded 1) number of eggs laid, 2) percent of eggs hatched, 3) percent of hatchlings surviving 10-15 days post-hatch, 4) number of nestlings produced, and 5) factors of offspring mortality in nests of Black-crowned Night Heron (Nycticorax nycticorax), Snowy Egret (Egretta thula), Cattle Egret (Bubulcus ibis), and Glossy Ibis (Plegadisfalcinellus). We randomly selected 30-50 nests of each species (as available) for study at colonies in Delaware Bay (1993-1998), New York Harbor (1986-1994), Cape Cod (1990-94), and Boston Harbor (1993-94). In addition, we recorded abundance of nesting wading birds and avian predators in most years of study. Colony size ranged from 120-8,300 nests. Clutch size of all species was greater at northern-most sites. Loss of eggs varied between estuaries for all species except Glossy Ibis. Hatching success ranged from 75-88% and differed between estuaries for Black-crowned Night Heron and Glossy Ibis. Hatchling survival ranged from 16-87% and was lowest in Delaware Bay for all species. Nestling production was lowest in Delaware Bay for all species. In general, predation was high in Delaware Bay and egg inviability was high in Boston Harbor. Predation of nestlings was greatest in Delaware Bay for Cattle Egret, but there were no differences between estuaries for other species. Proportions of avian predators to nesting herons did not explain high predation rates in Delaware Bay. Received 18 April 2001, accepted 21June 2001.","PeriodicalId":266321,"journal":{"name":"Waterbirds: The International Journal of Waterbird Biology","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130250409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Comparative Feeding Ecology of Steller's Eider and Long-Tailed Ducks in Winter 鹅绒鸭与长尾鸭冬季取食生态学比较

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522072

J. O. Bustnes, Geir H. R. Systad

{"title":"Comparative Feeding Ecology of Steller's Eider and Long-Tailed Ducks in Winter","authors":"J. O. Bustnes, Geir H. R. Systad","doi":"10.2307/1522072","DOIUrl":"https://doi.org/10.2307/1522072","url":null,"abstract":"-We examined the flexibility in feeding ecology of Steller's Eider (Polysticta stelleri) by comparing its diet to the taxonomically relatively close Long-tailed Duck (Clangula hyemalis) during two winter periods (early and late) when the two species occurred together. Steller's Eider generally fed on the same type of prey in early and late winter, with a dietary overlap of 43% between the two periods (57% among shelled prey). The mean number of prey species per bird was 7.8 in both early winter and late winter. In contrast, the Long-tailed Duck changed completely from feeding on benthic invertebrates in early winter to spawning Capelin (Mallotus villosus) in late winter. The dietary overlap between the two bird species was 38% in early winter. In early winter, the mean number of prey species was 5.5 in the Long-tailed Duck, and not significantly different from the Steller's Eider. Steller's Eider seemed to be restricted to small prey, both compared to availability of sizes and also to the prey size taken by the Long-tailed Duck. Thus the worldwide rare Steller's Eider seems to be a specialist with limited ability to exploit different food resources, while the numerous Long-tailed Duck is an opportunistic generalist. Low flexibility in feeding ecology indicates that winter habitats for Steller's Eider may be limited, and protection of these areas would probably benefit the species. Received 28June 2001, accepted 25 August 2001.","PeriodicalId":266321,"journal":{"name":"Waterbirds: The International Journal of Waterbird Biology","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124558157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 30

Nesting Habitat Characteristics and Breeding Performance of Dalmatian Pelicans in Lake Mikri Prespa, NW Greece 希腊西北部Mikri Prespa湖达尔马提亚鹈鹕筑巢生境特征及繁殖性能

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522069

G. Catsadorakis, A. Crivelli

{"title":"Nesting Habitat Characteristics and Breeding Performance of Dalmatian Pelicans in Lake Mikri Prespa, NW Greece","authors":"G. Catsadorakis, A. Crivelli","doi":"10.2307/1522069","DOIUrl":"https://doi.org/10.2307/1522069","url":null,"abstract":"-Dalmatian Pelicans (Pelecanus crispus) in Lake Mikri Prespa nest on islands of Common Reed (Phragmites) rhizomes formed at the interface between marsh and open water and mostly ranging from 6-80 m2 in area. Nest density from 1984 to 1996 varied from 0.12 to 1.2 nests/m2. Large islands were not more densely occupied than smaller ones. Higher nest densities were observed in the second and third year that a site was used. Islands used for nesting were degraded by weather, water and use by the birds and shrank in size by 1-55% each year; thus some were abandoned and new ones colonized each year. On the average, sites were used for three years in succession, but initially larger sites were used much longer. Nest site quality was related to island rigidity and the availability of nesting material on it. Numbers of breeding pelicans at Prespa are probably limited by the availability of suitable nest sites and, especially, larger islands, since breeding success is positively correlated with the mean nesting assemblage size (number of breeding attempts/number of sites). Artificial nesting rafts are likely to be more successful the more their features comply with the above findings and the more they enhance overall colony compactness. Received 15 April 2001, accepted 18 August 2001.","PeriodicalId":266321,"journal":{"name":"Waterbirds: The International Journal of Waterbird Biology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117340590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Unusual Migration Mortality of King Eiders in Central Baffin Island 巴芬岛中部帝王鸭的异常迁徙死亡率

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522082

M. Mallory, H. Gilchrist, S. Jamieson, G. Robertson, D. Campbell

引用次数: 8

Hydrographic Correlates of Winter Dunlin Abundance and Distribution in a Temperate Estuary 温带河口冬季Dunlin丰度和分布的水文关系

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522061

J. Kelly

{"title":"Hydrographic Correlates of Winter Dunlin Abundance and Distribution in a Temperate Estuary","authors":"J. Kelly","doi":"10.2307/1522061","DOIUrl":"https://doi.org/10.2307/1522061","url":null,"abstract":"From 1989 to 1999,1 examined intra-seasonal and annual changes in the abundance and local dis tribution of two groups ofwintering Dunlin (Calidris alpina) occupying different positions along hydrographic gra dients in the Tomales Bay estuary, California. Reciprocal translocation of color-banded Dunlin indicated a discrete separation of wintering Dunlin between the north and south of Tomales Bay. Local abundance in both groups was significantly associated with cumulative seasonal rainfall within and among years. Increased variation in annual and intra-seasonal abundance was related to reduced tidal circulation, greater freshwater stream flow, and increased sa linity variation. On average, winter Dunlin use peaked later but declined earlier in the southern part of the bay (near the head of the bay) than in the northern part of the bay (near the mouth of the bay), Shifts in distribution associated with changes in hydrographic conditions and weather revealed consistent intra-seasonal changes in hab itat preference on temporal scales other than tidal cycles. In the northern part of the bay, changes in habitat pref erence by Dunlin corresponded to thresholds of 20-25 cm cumulative rainfall and 0.5-1.0 m\" sec\" stream flow, whereas in the south bay changes were relatively continuous. Rainfall, wind velocity and direction, and temperature also influenced habitat preferences. Flocking beha~or dominated over habitat choice at low levels of Dunlin abun dance, resulting in contrasting patterns of habitat use relative to overall trends. These patterns suggested the loss of habitat quality as the criterion for patch use. In general, this study indicates that winter shorebird use of temper ate estuaries can be predicted by differences in weather and hydrographic regimes, including rates and variances of freshwater inflow, estuarine circulation, and water residence times unique to each system. Received 4 February","PeriodicalId":266321,"journal":{"name":"Waterbirds: The International Journal of Waterbird Biology","volume":"476 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117024002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Apparent Absence of Blood Parasites in the Patagonian Seabird Community: Is it Related to the Marine Environment? 巴塔哥尼亚海鸟群落中明显没有血寄生虫:这与海洋环境有关吗?

Waterbirds: The International Journal of Waterbird Biology Pub Date : 2001-12-01 DOI: 10.2307/1522076

R. Jovani, J. Tella, M. Forero, M. Bertellotti, G. Blanco, O. Ceballos, J. Donázar

引用次数: 44