Impact of greater sandhill cranes foraging on corn and barley crops

McIvor, Donald E.; Conover, Michael R.

doi:10.1016/0167-8809(94)90052-3

Cited by 13 publications

(6 citation statements)

References 10 publications

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“…We found that Black‐necked Cranes did not use habitats in proportion to their availability, and similar results have been reported for other species of cranes, including Sandhill Cranes ( Grus canadensis ; McIvor and Conover 1994) and Red‐crowned Cranes ( G. japonensis ; Ma et al 1999). Decisions about habitat use may be based on maximizing energy intake and nutrient balance, and minimizing predation risk (Belovsky and Schmitz 1994, Kie and Bowyer 1999, McShea et al 2001).…”

Section: Discussionsupporting

confidence: 88%

Foraging habitats and utilization distributions of Black-necked Cranes wintering at the Napahai Wetland, China

Liu¹,

Yang²,

Yang³

et al. 2010

Journal of Field Ornithology

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One of the most endangered populations of Black-necked Cranes (Grus nigricollis), the central population, is declining due to habitat loss and degradation, but little is known about their space use patterns and habitat preferences. We examined the space use and habitat preferences of Black-necked Cranes during the winter of 2007-2008 at the Napahai wetland in northwest Yunnan, China, where approximately 300 Black-necked Cranes (>90% of the total central population) spent the winter. Euclidean distance analysis was employed to determine the habitat preferences of Black-necked Cranes, and a local nearest-neighbor, convex-hull construction method was used to examine space use. Our results indicate that Black-necked Cranes preferred shallow marsh and wet meadow habitats and avoided farmland and dry grassland. Core-use areas (50% isopleths) and total-use areas (100% isopleths) accounted for only 1.2% and 28.2% of the study area, respectively. We recommend that habitat protection efforts focus on shallow marsh and wet meadow habitats to maintain preferred foraging sites. Core-use areas, such as the primary foraging areas of Black-necked Cranes, should be designated as part of the core zone of the nature reserve. Monthly shifts in the core-use areas of the cranes also indicate that the reserve should be large enough to permit changes in space use. In addition to preserving habitat, government officials should also take measures to decrease human activity in areas used by foraging Black-necked Cranes. RESUMEN. Hábitat de forrajeo y espacio utilizado por individuos invernales de Grus nigricollis en el anegado de Napahai, ChinaLa población central de la grulla Grus nigricollis, una de las más amenazada, ha mermado debido a la pérdida y degradación de hábitat. Se conoce muy poco sobre los patrones de uso de espacio y las preferencias de hábitat en esta ave. Examinamos el espacio utilizado y preferencias de hábitat durante los inviernos del 2007-2008 en los humedales de Napahai en el noroeste de Yunnan, China. Aproximadamente 300 grullas (90% de la población central) pasan el invierno en dicho lugar. Para determinar la preferencia de hábitat, se utilizó un análisis euclidiano de distancia. Además, para examinar el uso de espacio se utilizó y un análisis de "construcción de casco-convexo" del vecino más cercano. Nuestros resultados indican que las grullas prefieren anegados de poca profundidad y yerbasales húmedos y que evitanáreas agrícolas y yerbasales secos. Elárea central de uso (50% isopletos) y lasáreas totales utilizadas (100% isopletos), formaron parte del 1.2% y 28.2% delárea total de estudio, respectivamente. Recomendamos enfocar el esfuerzo en la protección de hábitat tales como anegados de poca profundidad y yerbasales húmedos, para conservar los lugares preferidos de forrajeo. Dentro de la zona central de uso deben ser designadas como parte de una reserva natural lasáreas principales de forrajeo. Los cambios mensuales en lasáreas centrales de uso, por parte de las grullas, indican que las reservas deben ser lo su...

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Section: Discussionsupporting

confidence: 88%

Foraging habitats and utilization distributions of Black-necked Cranes wintering at the Napahai Wetland, China

Liu¹,

Yang²,

Yang³

et al. 2010

Journal of Field Ornithology

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“…The Imperial Valley (IV) is located south of the Salton Sea and 64 km north of the Mexico border. Similar to the LCRV greater than 100 different agricultural crops (e.g., alfalfa, sweet corn, wheat, Sudan grass, sugar beets, and carrots) are cultivated in the valley, many of which are valuable forage for cranes (Reinecke and Krapu 1986, Iverson et al 1987, McIvor and Conover 1994, Imperial County Farm Bureau 2014. Waste grain is a known forage of cranes and is frequent in the IV fields and granaries (Iverson et al 1985, Iverson et al 1987, Sudgen et al 1988.…”

Section: Study Areamentioning

confidence: 99%

Roost Sites Influence Habitat Selection of Sandhill Cranes (Antigone canadensis tabida) in Arizona and California

Collins,

Boggie,

Kruse

et al. 2023

Waterbirds

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Wetlands in arid and semiarid regions are recognized as priority ecosystems for conservation of wetland-dependent species in these systems. Evaluation of habitat selection is necessary for effective habitat management and, consequently, population management. The Lower Colorado River Valley population of Greater Sandhill Cranes (Antigone canadensis tabida), winters exclusively in portions of southwestern Arizona and southeastern California. Therefore, there is a need for information pertaining to winter habitat selection to guide management decisions. We attached solar-powered satellite platform transmitter terminals to greater Sandhill Cranes and used daily global positioning system locations. Each used location paired with 10 randomly generated locations had equal probability of drawing any of the randomly generated locations. We evaluated habitat selection and found the model that included land use type (β = −5.85, SE = 0.23, P < 0.001) and distance to roost (β = −4.61, SE = 0.16, P < 0.001) as interactive effects was the most supported model in the candidate set. Our results emphasize the importance of maintaining wetlands in close proximity (~ 5 km) to selected land use types, which can be challenging to manage for in arid systems but are particularly necessary for this high conservation priority population of greater Sandhill Cranes.

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“…Thus, management strategies are likely to be more effective if they are based on knowledge of temporal and spatial patterns of wildlife–agriculture interactions (Tyrrell et al, 2017; Cozzi et al, 2019). For instance, to mitigate the impact of migratory sandhill cranes (McIvor & Conover, 1994; Boggie et al, 2018), farmers harvest grain before the cranes arrive, and supplementary food is provided for cranes on public land to attract them away from farms (Boggie et al, 2018). In Europe, information on the spatial extent of interactions between the wild boar Sus scrofa and farms allowed researchers to evaluate the risk of crop predation for different farms, and to recommend ways to reduce crop damage in targeted areas, thereby reducing human–wildlife conflict (Cozzi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Body size, sex and high philopatry influence the use of agricultural land by Galapagos giant tortoises

Pike

Blake

Cabrera

et al. 2021

Oryx

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As agricultural areas expand, interactions between wild animals and farmland are increasing. Understanding the nature of such interactions is vital to inform the management of human–wildlife coexistence. We investigated patterns of space use of two Critically Endangered Galapagos tortoise species, Chelonoidis porteri and Chelonoidis donfaustoi, on privately owned and agricultural land (hereafter farms) on Santa Cruz Island, where a human–wildlife conflict is emerging. We used GPS data from 45 tortoises tracked for up to 9 years, and data on farm characteristics, to identify factors that influence tortoise movement and habitat use in the agricultural zone. Sixty-nine per cent of tagged tortoises used the agricultural zone, where they remained for a mean of 150 days before returning to the national park. Large male tortoises were more likely to use farms for longer periods than female and smaller individuals. Tortoises were philopatric (mean overlap of farmland visits = 88.7 ± SE 2.9%), on average visiting four farms and occupying a mean seasonal range of 2.9 ± SE 0.3 ha. We discuss the characteristics of farm use by tortoises, and its implications for tortoise conservation and coexistence with people.

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Impact of greater sandhill cranes foraging on corn and barley crops

Cited by 13 publications

References 10 publications

Foraging habitats and utilization distributions of Black-necked Cranes wintering at the Napahai Wetland, China

Foraging habitats and utilization distributions of Black-necked Cranes wintering at the Napahai Wetland, China

Roost Sites Influence Habitat Selection of Sandhill Cranes (Antigone canadensis tabida) in Arizona and California

Body size, sex and high philopatry influence the use of agricultural land by Galapagos giant tortoises

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