Diet of Black-crowned Night-herons (Nycticorax nycticorax) in a Wetland of the Parana River´s Alluvial Valley

Quiroga, Martín Anibal; Leon, Evelina Jésica; Beltzer, Adolfo H.; Olguín, Pamela Fernanda

doi:10.5053/ekoloji.2013.886

Cited by 6 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Regardless, the low absolute abundance of these species did not Some species, such as the black-crowned night heron (Nycticorax nycticorax) and Black Kite (Milvus migrans), were only found in the land-sharing sites. Their presence can be explained by their respective diets; Black-Crowned Night Herons feed on fish, insects, and crustaceans [73], whereas black kites feed on birds, small mammals, insects, and they can sometimes act as scavengers [74]. The Purple Sunbird (Cinnyris asiaticus) and Black Drongo (Dicrurus macrocercus) had a much higher abundance in the land-sharing sites.…”

Section: Bird Speciesmentioning

confidence: 99%

Land Sparing Can Maintain Bird Diversity in Northeastern Bangladesh

et al. 2020

View full text Add to dashboard Cite

One of humanity’s most significant challenges in the process of attaining the established sustainability goals is balancing the growing human demand for food and the need to conserve biodiversity. This challenge requires appropriate land uses that are able to conserve biodiversity while ensuring ample food supply. This study compares bird species diversity and abundance in areas undergoing land sharing and land sparing in northeastern Bangladesh (West Bhanugach Reserved Forest). Birds serve as useful biologic indicators because of their presence within different trophic levels and their well-studied ecology. To survey birds, we selected a total of 66 sampling sites within land-sharing (33) and land-sparing (33) land-use areas. Between May and June 2017, we observed and recorded bird calls within a 50-m radius around each sampling site. We counted 541 individuals from 46 species of birds. The Shannon bird diversity was higher in the land-sparing sites (1.52) than in the land-sharing sites (1.23). We found approximately 30% more bird species (39 vs. 30) and 40% more individuals (318 vs. 223) in the land-sparing areas than land-sharing areas. Three bird species, Arachnothera longirostra, Micropternus brachyurus and Copsychus malabaricus, were significantly associated with the land-sparing sites. This study shows that land sharing negatively affects bird diversity, richness and abundance compared to land-sparing. The use of chemical fertilizers and the lack of food, such as insects, for birds can explain the lower diversity, richness and abundance of birds in the land-sharing areas. Although land sharing is an effective means of producing food, land sparing is the most effective land-use practice for preserving bird diversity in northeastern Bangladesh.

show abstract

Section: Bird Speciesmentioning

confidence: 99%

Land Sparing Can Maintain Bird Diversity in Northeastern Bangladesh

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Nycticorax nycticorax (Pelecaniformes, Ardeidae) es una especie cosmopolita (Beltzer et al 2005) con hábitos crepusculares y nocturnos de alimentación, si bien puede alimentarse también durante el día (Maccarone & Bayleigh 2014). Su dieta es muy variada, compuesta principalmente por peces e insectos (Kazantzidis & Goutner 2005), aunque también consumen reptiles, crustáceos, moluscos, arácnidos, pequeños mamíferos, aves y restos vegetales (Hall & Kress 2008, Quiroga et al 2013, Hothem et al 2020. Esta especie coexiste con al menos otras siete especies de la familia Ardeidae en los humedales del Paraná Medio (Argentina), integrando un gremio trófico para el que se han propuesto mecanismos adaptativos de segregación ecológica basados en la utilización diferencial de los recursos (Beltzer et al 2005).…”

unclassified

CANIBALISMO EN Nycticorax nycticorax Y DEPREDACIÓN INTERESPECÍFICA DE JUVENILES DE N. nycticorax SOBRE PICHONES Ardea alba (ARDEIDAE) EN UNA COLONIA MIXTA EN ARGENTINA

Sovrano¹,

Regner²,

Lorenzón³

et al. 2022

Oecol. Aust.

View full text Add to dashboard Cite

Existen escasos estudios que han documentado canibalismo y depredación entre especies de garzas (Ardeidae) coloniales y las causas que desencadenan estos comportamientos. En este trabajo, se describe el canibalismo de juveniles de Nycticorax nycticorax consumiendo pichones conspecíficos menos desarrollados y depredación intraespecífica sobre pichones de Ardea alba en un humedal del río Paraná Medio (Santa Fe, Argentina). Las observaciones registradas en una colonia de nidificación durante 2016 se utilizaron para describir los comportamientos relacionados con la alimentación, ataque y defensa de pichones y juveniles. Es el primer registro de canibalismo en colonias de garzas para la región Neotropical. El comportamiento caníbal podría reducir las desventajas generadas por la alta mortalidad de juveniles en condiciones de escasez en la colonia incrementando sus probabilidades de supervivencia.Palabras claves: canibalismo; comportamiento; depredación interespecífica; garzas; río Paraná. CANNIBALISM IN Nycticorax nycticorax AND INTERSPECIFIC PREDATION BY JUVENILES OF N. nycticorax ON Ardea alba (ARDEIDAE) IN A MIXED-SPECIES NESTING COLONY IN ARGENTINA:Few studies have documented the presence of cannibalism and predation among colonial heron species (Ardeidae) and the causes of these behaviors. In this study, we describe cannibalism by juveniles of Nycticorax nycticorax consuming conspecific younger chicks and predation of these juveniles on chicks of Ardea alba in a wetland of the Parana Middle River (Santa Fe, Argentina). During 2016, the observations recorded were used to describe the behaviors related to the feeding, attack and defense of chicks and juveniles. This is the first record of cannibalism in heron colonies in the Neotropical region. The cannibalism could reduce the disadvantages generated by the high mortality of juveniles in the colony, increasing their chances of survival.

show abstract

Wetland dependency drives temporal turnover of bird species between high‐ and low‐water years in floodplain wetlands of the Paraná River

2019

View full text Add to dashboard Cite

Temporal turnover of species between predominantly aquatic and terrestrial phases of floodplains, a process that helps maintain the high bird diversity of river–floodplain systems, could be driven by dependency of species on wetlands. To assess this, we compared the bird assemblages of river–floodplain systems at 60 sites along the Paraná River during the nonbreeding seasons of 2011, when water levels were predominantly high (high‐water year), and 2012, when levels were predominantly much lower (low‐water year). Birds were sampled by point counts repeated four times during each year at each site. We tested whether temporal patterns differed between wetland‐dependent and nonwetland‐dependent birds because these groups show positive and negative relationships, respectively, with water‐level increases. Species composition varied between years. Ten of the 14 species associated with high water levels in 2011 were waterbirds, and 11 of the 14 species associated with lower water levels (2012) were nonwetland species. Species richness and abundance per site of waterbirds and abundance of wetland species were higher during the high‐water year than in the low‐water year. Species richness, abundance, and diversity per site of nonwetland birds were, on the other hand, higher during the low‐water year than in the high‐water year. Species turnover between predominantly high‐ and low‐water periods did not respond to shorter term water‐level fluctuations within each year. In conclusion, our results show that degree of wetland dependence drives bird species turnover as a function of water‐level fluctuations, showing the importance of hydrological variability for bird conservation in river–floodplain systems.

show abstract

Diet of Black-crowned Night-herons (Nycticorax nycticorax) in a Wetland of the Parana River´s Alluvial Valley

Cited by 6 publications

References 23 publications

Land Sparing Can Maintain Bird Diversity in Northeastern Bangladesh

Land Sparing Can Maintain Bird Diversity in Northeastern Bangladesh

CANIBALISMO EN Nycticorax nycticorax Y DEPREDACIÓN INTERESPECÍFICA DE JUVENILES DE N. nycticorax SOBRE PICHONES Ardea alba (ARDEIDAE) EN UNA COLONIA MIXTA EN ARGENTINA

Wetland dependency drives temporal turnover of bird species between high‐ and low‐water years in floodplain wetlands of the Paraná River

Contact Info

Product

Resources

About