Low incubation investment in the burrow-nesting Crab Plover Dromas ardeola permits extended foraging on a tidal food resource
We used GPS data‐loggers, video‐recordings and dummy eggs to assess whether foraging needs may force the low incubation attentiveness (
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| Veröffentlicht in: | Ibis (London, England) England), 2015-01, Vol.157 (1), p.31-43 |
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| creator | De Marchi, Giuseppe Chiozzi, Giorgio Dell'Omo, Giacomo Fasola, Mauro |
| description | We used GPS data‐loggers, video‐recordings and dummy eggs to assess whether foraging needs may force the low incubation attentiveness ( |
| doi_str_mv | 10.1111/ibi.12208 |
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The tidal cycle was the major determinant of the time budget and some foraging trips were more distant from the colony than previously known (up to 26 km away and lasting up to 45 h). The longest trips were mostly made by off‐duty parents, but on‐duty parents also frequently left the nest unattended while foraging for 1–7 h. However, the time spent at the colony area (47%) and the time spent roosting on the foraging grounds (16%) would have allowed almost continuous incubation, as in other species with shared incubation. Therefore, the low incubation attentiveness is not explained by the need for long foraging trips but is largely dependent on a high intermittent rhythm of incubation with many short recesses (5.8 ± 2.6 recesses/h) that were not spent foraging but just outside the burrow or thermoregulating at the seashore. As a result, the eggs were warmed on average only 1.7 °C above burrow temperature, slightly more during high tide periods and when burrow temperature was lower between 20:00 and 10:00 h, only partly counteracting the temperature fluctuations of the incubation chamber. These results suggest that low incubation attentiveness is due to the favourable thermal conditions provided by safe nesting burrows and by the hot tropical breeding season, a combination that allows simultaneous foraging by parents and the exploitation of distant foraging grounds. Why Crab Plovers engage in many short recesses from incubation still remains to be clarified but the need to thermoregulate at the seashore and to watch for predators may play a role.</description><identifier>ISSN: 0019-1019</identifier><identifier>EISSN: 1474-919X</identifier><identifier>DOI: 10.1111/ibi.12208</identifier><language>eng</language><publisher>Oxford: Blackwell Publishing Ltd</publisher><subject>Birds ; Brackish ; burrow temperature ; Crab Plover ; Decapoda ; Dromas ardeola ; egg-dummies ; Foraging behavior ; foraging trips ; GPS tracking ; incubation rhythm ; Marine ; Ornithology ; temperature ; tide level ; time budget</subject><ispartof>Ibis (London, England), 2015-01, Vol.157 (1), p.31-43</ispartof><rights>2014 British Ornithologists' Union</rights><rights>Ibis © 2015 British Ornithologists' Union</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3688-12e792fe7d99e6bb18b61a7c87db6c140e2f51c4199e0dee9e889654a8b2fbe73</citedby><cites>FETCH-LOGICAL-c3688-12e792fe7d99e6bb18b61a7c87db6c140e2f51c4199e0dee9e889654a8b2fbe73</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fibi.12208$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fibi.12208$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27923,27924,45573,45574</link.rule.ids></links><search><contributor>Pearce-Higgins, James</contributor><contributor>Pearce‐Higgins, James</contributor><creatorcontrib>De Marchi, Giuseppe</creatorcontrib><creatorcontrib>Chiozzi, Giorgio</creatorcontrib><creatorcontrib>Dell'Omo, Giacomo</creatorcontrib><creatorcontrib>Fasola, Mauro</creatorcontrib><title>Low incubation investment in the burrow-nesting Crab Plover Dromas ardeola permits extended foraging on a tidal food resource</title><title>Ibis (London, England)</title><addtitle>Ibis</addtitle><description>We used GPS data‐loggers, video‐recordings and dummy eggs to assess whether foraging needs may force the low incubation attentiveness (< 55%) of the Crab Plover Dromas ardeola, a crab‐eating wader of the Indian Ocean that nests colonially in burrows. The tidal cycle was the major determinant of the time budget and some foraging trips were more distant from the colony than previously known (up to 26 km away and lasting up to 45 h). The longest trips were mostly made by off‐duty parents, but on‐duty parents also frequently left the nest unattended while foraging for 1–7 h. However, the time spent at the colony area (47%) and the time spent roosting on the foraging grounds (16%) would have allowed almost continuous incubation, as in other species with shared incubation. Therefore, the low incubation attentiveness is not explained by the need for long foraging trips but is largely dependent on a high intermittent rhythm of incubation with many short recesses (5.8 ± 2.6 recesses/h) that were not spent foraging but just outside the burrow or thermoregulating at the seashore. As a result, the eggs were warmed on average only 1.7 °C above burrow temperature, slightly more during high tide periods and when burrow temperature was lower between 20:00 and 10:00 h, only partly counteracting the temperature fluctuations of the incubation chamber. These results suggest that low incubation attentiveness is due to the favourable thermal conditions provided by safe nesting burrows and by the hot tropical breeding season, a combination that allows simultaneous foraging by parents and the exploitation of distant foraging grounds. Why Crab Plovers engage in many short recesses from incubation still remains to be clarified but the need to thermoregulate at the seashore and to watch for predators may play a role.</description><subject>Birds</subject><subject>Brackish</subject><subject>burrow temperature</subject><subject>Crab Plover</subject><subject>Decapoda</subject><subject>Dromas ardeola</subject><subject>egg-dummies</subject><subject>Foraging behavior</subject><subject>foraging trips</subject><subject>GPS tracking</subject><subject>incubation rhythm</subject><subject>Marine</subject><subject>Ornithology</subject><subject>temperature</subject><subject>tide level</subject><subject>time budget</subject><issn>0019-1019</issn><issn>1474-919X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp1kU1PxCAQhonRxPXj4D8g8aKHKrTdUo66fq3Z6MZo9EagnSralhVaVw_-d0dXPZjIAWaG530zMIRscbbHce1bY_d4HLN8iQx4KtJIcnm3TAaMcRlx3FbJWgiPmIpE8gF5n7g5tW3RG91Z12L4AqFroO0wpN0DUNN77-ZRi2Xb3tOR14ZOa_cCnh551-hAtS_B1ZrOwDe2CxReO2hLKGnlvL7_FKGxpp0tdY01V1IPwfW-gA2yUuk6wOb3uU5uTo6vR2fR5PJ0PDqYREWS5XnEYxAyrkCUUkJmDM9NxrUoclGarOApg7ga8iLleM1KAAl5LrNhqnMTVwZEsk52Fr4z7557fIlqbCigrnULrg-KZ6lgMX5Kguj2H_QRW22xO6SSjAn0jZHaXVCFdyF4qNTM20b7N8WZ-hyEwkGor0Egu79g57aGt_9BNT4c_yiihcKGDl5_Fdo_qUwkYqhuL07V9d1ken41leow-QB5aJq7</recordid><startdate>201501</startdate><enddate>201501</enddate><creator>De Marchi, Giuseppe</creator><creator>Chiozzi, Giorgio</creator><creator>Dell'Omo, Giacomo</creator><creator>Fasola, Mauro</creator><general>Blackwell Publishing Ltd</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>C1K</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope><scope>7TN</scope></search><sort><creationdate>201501</creationdate><title>Low incubation investment in the burrow-nesting Crab Plover Dromas ardeola permits extended foraging on a tidal food resource</title><author>De Marchi, Giuseppe ; Chiozzi, Giorgio ; Dell'Omo, Giacomo ; Fasola, Mauro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3688-12e792fe7d99e6bb18b61a7c87db6c140e2f51c4199e0dee9e889654a8b2fbe73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Birds</topic><topic>Brackish</topic><topic>burrow temperature</topic><topic>Crab Plover</topic><topic>Decapoda</topic><topic>Dromas ardeola</topic><topic>egg-dummies</topic><topic>Foraging behavior</topic><topic>foraging trips</topic><topic>GPS tracking</topic><topic>incubation rhythm</topic><topic>Marine</topic><topic>Ornithology</topic><topic>temperature</topic><topic>tide level</topic><topic>time budget</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>De Marchi, Giuseppe</creatorcontrib><creatorcontrib>Chiozzi, Giorgio</creatorcontrib><creatorcontrib>Dell'Omo, Giacomo</creatorcontrib><creatorcontrib>Fasola, Mauro</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Oceanic Abstracts</collection><jtitle>Ibis (London, England)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>De Marchi, Giuseppe</au><au>Chiozzi, Giorgio</au><au>Dell'Omo, Giacomo</au><au>Fasola, Mauro</au><au>Pearce-Higgins, James</au><au>Pearce‐Higgins, James</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Low incubation investment in the burrow-nesting Crab Plover Dromas ardeola permits extended foraging on a tidal food resource</atitle><jtitle>Ibis (London, England)</jtitle><addtitle>Ibis</addtitle><date>2015-01</date><risdate>2015</risdate><volume>157</volume><issue>1</issue><spage>31</spage><epage>43</epage><pages>31-43</pages><issn>0019-1019</issn><eissn>1474-919X</eissn><abstract>We used GPS data‐loggers, video‐recordings and dummy eggs to assess whether foraging needs may force the low incubation attentiveness (< 55%) of the Crab Plover Dromas ardeola, a crab‐eating wader of the Indian Ocean that nests colonially in burrows. The tidal cycle was the major determinant of the time budget and some foraging trips were more distant from the colony than previously known (up to 26 km away and lasting up to 45 h). The longest trips were mostly made by off‐duty parents, but on‐duty parents also frequently left the nest unattended while foraging for 1–7 h. However, the time spent at the colony area (47%) and the time spent roosting on the foraging grounds (16%) would have allowed almost continuous incubation, as in other species with shared incubation. Therefore, the low incubation attentiveness is not explained by the need for long foraging trips but is largely dependent on a high intermittent rhythm of incubation with many short recesses (5.8 ± 2.6 recesses/h) that were not spent foraging but just outside the burrow or thermoregulating at the seashore. As a result, the eggs were warmed on average only 1.7 °C above burrow temperature, slightly more during high tide periods and when burrow temperature was lower between 20:00 and 10:00 h, only partly counteracting the temperature fluctuations of the incubation chamber. These results suggest that low incubation attentiveness is due to the favourable thermal conditions provided by safe nesting burrows and by the hot tropical breeding season, a combination that allows simultaneous foraging by parents and the exploitation of distant foraging grounds. Why Crab Plovers engage in many short recesses from incubation still remains to be clarified but the need to thermoregulate at the seashore and to watch for predators may play a role.</abstract><cop>Oxford</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/ibi.12208</doi><tpages>13</tpages></addata></record> |
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| subjects | Birds Brackish burrow temperature Crab Plover Decapoda Dromas ardeola egg-dummies Foraging behavior foraging trips GPS tracking incubation rhythm Marine Ornithology temperature tide level time budget |
| title | Low incubation investment in the burrow-nesting Crab Plover Dromas ardeola permits extended foraging on a tidal food resource |
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