Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil
Habitat use by the Little Blue Heron (Egretta caerulea) and discovery of feeding territoriality are discussed here. The results showed the existence of a territorial individual defending an area (2,564.46 ± 943.56 m²) close to the mangrove, and non-territorial individuals (9.17 ± 2.54) in the rest o...
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
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| Series: | Brazilian Journal of Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000200002&lng=en&tlng=en |
| _version_ | 1811213189606539264 |
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| author | E Moralez-Silva FJL Silva ELA Monteiro-Filho |
| author_facet | E Moralez-Silva FJL Silva ELA Monteiro-Filho |
| author_sort | E Moralez-Silva |
| collection | DOAJ |
| description | Habitat use by the Little Blue Heron (Egretta caerulea) and discovery of feeding territoriality are discussed here. The results showed the existence of a territorial individual defending an area (2,564.46 ± 943.56 m²) close to the mangrove, and non-territorial individuals (9.17 ± 2.54) in the rest of a demarcated area (mean area for the non-territorial: 893.25 ± 676.72). A weak positive correlation (r = 0.47, df = 46, p < 0.05) was found between the overlapping of territorial and non-territorial individuals (2.85 ± 3.07 m²) and the mean overlapped area for territorial individuals (171.41 ± 131.40 m²). Higher capture (1.52 ± 1.14 × 1.00 ± 1.37 catches/minutes) and success rates (0.45 ± 0.31 × 0.21 ± 0.27) and lower energy expenditure rates (45.21 ± 14.96 × 51.22 ± 14.37 steps/minutes; and 3.65 ± 2.55 × 4.94 ± 3.28 stabs/minutes) were observed for individuals foraging in areas close to the mangrove. The results suggest that the observed territorial behaviour is more related to a number of food parameters than to intruder pressure, and also that the observed territoriality might be related to defense of areas with higher prey availability. |
| first_indexed | 2024-04-12T05:41:46Z |
| format | Article |
| id | doaj.art-027ef33ecc4b49a295fadbb0783a40a4 |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-04-12T05:41:46Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-027ef33ecc4b49a295fadbb0783a40a42022-12-22T03:45:35ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-437570223524210.1590/S1519-69842010005000020S1519-69842010000200002Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, BrazilE Moralez-Silva0FJL Silva1ELA Monteiro-Filho2Universidade Federal do Rio Grande do NorteUniversidade Federal do Rio Grande do NorteInstituto de Pesquisas CananéiaHabitat use by the Little Blue Heron (Egretta caerulea) and discovery of feeding territoriality are discussed here. The results showed the existence of a territorial individual defending an area (2,564.46 ± 943.56 m²) close to the mangrove, and non-territorial individuals (9.17 ± 2.54) in the rest of a demarcated area (mean area for the non-territorial: 893.25 ± 676.72). A weak positive correlation (r = 0.47, df = 46, p < 0.05) was found between the overlapping of territorial and non-territorial individuals (2.85 ± 3.07 m²) and the mean overlapped area for territorial individuals (171.41 ± 131.40 m²). Higher capture (1.52 ± 1.14 × 1.00 ± 1.37 catches/minutes) and success rates (0.45 ± 0.31 × 0.21 ± 0.27) and lower energy expenditure rates (45.21 ± 14.96 × 51.22 ± 14.37 steps/minutes; and 3.65 ± 2.55 × 4.94 ± 3.28 stabs/minutes) were observed for individuals foraging in areas close to the mangrove. The results suggest that the observed territorial behaviour is more related to a number of food parameters than to intruder pressure, and also that the observed territoriality might be related to defense of areas with higher prey availability.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000200002&lng=en&tlng=enárea de usocomportamento alimentardefesaestuárioterritório |
| spellingShingle | E Moralez-Silva FJL Silva ELA Monteiro-Filho Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil Brazilian Journal of Biology área de uso comportamento alimentar defesa estuário território |
| title | Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil |
| title_full | Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil |
| title_fullStr | Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil |
| title_full_unstemmed | Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil |
| title_short | Unravelling feeding territoriality in the Little Blue Heron, Egretta caerulea, in Cananéia, Brazil |
| title_sort | unravelling feeding territoriality in the little blue heron egretta caerulea in cananeia brazil |
| topic | área de uso comportamento alimentar defesa estuário território |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842010000200002&lng=en&tlng=en |
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