Breeding success of the masked booby (Sula dactylatra dactylatra, Pelecaniformes:Sulidae) at Middle Cay, Pedro Bank, Jamaica
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| Format: | Artículo científico |
| Langue: | en |
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Universidad de Costa Rica
2014
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| _version_ | 1876423630224621568 |
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| author | Peter J. Ainsworth |
| author_facet | Peter J. Ainsworth |
| contents | Breeding success of the masked booby (Sula dactylatra dactylatra, Pelecaniformes:Sulidae) at Middle Cay, Pedro Bank, Jamaica Peter J. Ainsworth Dale F. St. G. Webber Biología Jamaica sea bird Middle Cay Pedro Bank Masked booby The masked booby ( Sula dactylatra dactylatra) colony at Middle Cay, Pedro Bank, 60 miles south of Jamaica, has been affected by challenges resulting from anthropogenic disturbances. Despite habitat degrada - tion, the colony displays resilience by remaining extant on the cay. Between June 2008 and June 2009 we inves - tigated the colony’s health (mainly breeding success). Data were collected once per month for twelve months and included one day, seven day and 24 hour (day and night continuous observational) sojourns. Forty-four nests were marked and monitored using a novel method for marking seabird nests based on painted seashells. Data collected from the colony included: the presence/absence/number of egg(s)/chick(s) in nests, offspring maturity, adult attendance at nests and the time of data collection. An average of 227 adult birds constituted the colony. Using the Mayfield Method and the “Naïve Estimator” for comparison, the colony’s breeding success was determined to be 37.20% despite a hatching success of 40% and a fledgling success of 93%. This is less than the estimated 45.77% success typical of healthy colonies of sulids such as the masked booby elsewhere. Based on the breeding success calculations the long term survival of this colony is at risk and needs active conservation. 2014 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44932432015 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.62 |
| format | Artículo científico |
| id | redalyc_44932432015 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Universidad de Costa Rica |
| spellingShingle | Breeding success of the masked booby (Sula dactylatra dactylatra, Pelecaniformes:Sulidae) at Middle Cay, Pedro Bank, Jamaica Peter J. Ainsworth Biología Jamaica sea bird Middle Cay Pedro Bank Masked booby Breeding success of the masked booby (Sula dactylatra dactylatra, Pelecaniformes:Sulidae) at Middle Cay, Pedro Bank, Jamaica Peter J. Ainsworth Dale F. St. G. Webber Biología Jamaica sea bird Middle Cay Pedro Bank Masked booby The masked booby ( Sula dactylatra dactylatra) colony at Middle Cay, Pedro Bank, 60 miles south of Jamaica, has been affected by challenges resulting from anthropogenic disturbances. Despite habitat degrada - tion, the colony displays resilience by remaining extant on the cay. Between June 2008 and June 2009 we inves - tigated the colony’s health (mainly breeding success). Data were collected once per month for twelve months and included one day, seven day and 24 hour (day and night continuous observational) sojourns. Forty-four nests were marked and monitored using a novel method for marking seabird nests based on painted seashells. Data collected from the colony included: the presence/absence/number of egg(s)/chick(s) in nests, offspring maturity, adult attendance at nests and the time of data collection. An average of 227 adult birds constituted the colony. Using the Mayfield Method and the “Naïve Estimator” for comparison, the colony’s breeding success was determined to be 37.20% despite a hatching success of 40% and a fledgling success of 93%. This is less than the estimated 45.77% success typical of healthy colonies of sulids such as the masked booby elsewhere. Based on the breeding success calculations the long term survival of this colony is at risk and needs active conservation. 2014 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44932432015 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.3 Vol.62 |
| title | Breeding success of the masked booby (Sula dactylatra dactylatra, Pelecaniformes:Sulidae) at Middle Cay, Pedro Bank, Jamaica |
| topic | Biología Jamaica sea bird Middle Cay Pedro Bank Masked booby |
| url | https://www.redalyc.org/articulo.oa?id=44932432015 |