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Foraging Habitat Preferences of Herons and Egrets

Journal of Ecology and Environment / Journal of Ecology and Environment, (P)2287-8327; (E)2288-1220
2007, v.30 no.3, pp.237-244



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Abstract

We investigated the foraging habitat preferences of heronsand egrets in an agricultural area inAsan city, Chungcheongnam-do, Korea. In the study area, rice fields were the most abundant habitat ype (86.8%)and total suitable feding habitat was greater in the northern area (59.0%) than the southern area (2.5%) ofthe colony. Most feding herons and egrets were located in the northern area of the colony. The number offeding individuals in a given area was related to the availa ble feding area (Pearson corelation, r=0.73,p< 0.01 for field habitats;r=0.901, p< 0.01 for freshwater habitats). Feding habitat preferences difered amongspecies. Grey herons (Ardea cinerea ), great egrets (Egreta lba ), and black-crowned night herons (Nycticoraxnycticorax) used reservoirs and itches. However, intermediate gret s (E.intermedia ) and catle grets ( Bubulcusibis ) were dependent on rice fields. The litle gret ( E. garzeta ) was a habitat generalist using al types ofhabitats. The two largest species, grey herons and great egrets, fed at deper site than litle grets and foragedin deper sites in reservoirs than in ditches (.2-test,.23=26.6 and p< 0.01 for grey herons, .23 =17.5 andp< 0.01 for great egrets). Al species displayed seasonal changes in feding habitat use and these changes wererelated with changes in availability of eding habitats.

keywords
Ardeidae, Egrets, Feding habitat, Foraging, Habitat preferences, Herons.Choi, Yu-Seong et al. J. Ecol. Field Biol. 30 (3) 238in the study area were from this colony. The breding colony islocated near a reservoir that many herons and egrets use as af, Ardeidae, Egrets, Feding habitat, Foraging, Habitat preferences, Herons.Choi, Yu-Seong et al. J. Ecol. Field Biol. 30 (3) 238in the study area were from this colony. The breding colony islocated near a reservoir that many herons and egrets use as af

Reference

1.

(2002) Agricultural wetlands and waterbirds a review,

2.

(1994) Wading birds use of Lake Okeechobee relative to fluctuating water levels,

3.

(1997) Foraging ecology of the Grey Heron and Little Egret in response to habitat Greek wetlands,

4.

(1987) The effect of prey density on foraging behavior and success of adult and first-year Grey Herons,

5.

(1990) A review of current Issues and required action International Union for Conservation of Nature and Natural Resources,

6.

(1985) and seasonality in egrets,

7.

(1985) Differences in the feeding behavior of Little Egrets in two habitats in the Camargue,

8.

(1996) The size of heron colonies in Portugal in relation to foraging habitat,

9.

(1986) Resource use of foraging herons in agricultural and nonagricultural habitats in Italy,

10.

(1996) The value of rice fields as substitutes for natural wetlands for waterbirds in the Mediterranean region,

11.

(1996) Rice fields support a large portion of herons breeding in the Mediterranean region,

12.

(1997) Ecology of wading birds,

13.

(1992pp194-201) The relationship between feeding habitat and colonially nesting Ardeidae,

14.

(1983) Changes of foraging sites by nesting Little Egrets in relation to food supply,

15.

(1986) Use of artificial and natural wetlands as feeding sites by Little Egrets,

16.

(1991) Flock feeding and food intake in Little Egrets the effects of prey distribution and behaviour,

17.

(2007) Clutch size reproductive success and growth rate of Black crowned Night Herons Nycticorax nycticorax,

18.

(1998) Breeding ecology of the Black crowned Night Heron Nycticorax nycticorax,

19.

(1986) Responses of wading birds to seasonally fluctuating water levels:strategies and their limits, 155-162

20.

(2005) The herons, Oxford University Press

21.

(1998) The impact of changes in irrigation practices on the distribution of foraging egrets and herons in the rice fields of central Japan,

22.

(2007) The characteristics of mixed heronries in Jeollanam do,

23.

(1994) Factors affecting the use of a freshwater and an estuarine foraging site by egrets and ibises during the breeding season in New York City,

24.

(2001) Patterns of bird abundance and habitat use in rice fields of the Kanto Plain,

25.

(1987) Habitat use by wading birds in a subtropical estuary:implications of hydrography, 740-749

26.

(1993) Resource use by herons in a Yucatan wetland during the breeding season,

27.

(2001) The foraging ecology of egrets in rice fields in southern New South Wales,

28.

(1996) Foraging site preferences of intermediate egrets Egretta intermedia during the breeding season in the eastern part of the Kanto Plain ,

29.

(1995) Foraging flights and habitat use of nesting wading birds at Lake Okeechobee,

30.

(1997) Nesting season food habits of 4 species of herons and egrets at Lake Okeechobee,

31.

(1996) Habitat selection foraging behavior and prey of five heron species in Japan,

32.

(1999) Breeding of Night Heron Nycticorax nycticorax in the forelands of the river Ijssel,

33.

(1999) Foraging flights of nesting egrets and herons at a Hong Kong egretry south China,

34.

(2001) Utilization of wetlands by ardeids in Starling Inlet a year-round study and a comparison between the census and flight line methods,

35.

(1997) Breeding ecology of the Black-crowned Night Heron in Korea,

36.

(1999) Biostatistical Analysis 4th ed, Prentice Hall International

37.

(2007) Received May 29 Accepted July 25,

Journal of Ecology and Environment