Intercolony and Annual Differences in the Diet and Feeding Ecology of Little Tern Adults and Chicks in Portugal

Catry, Teresa; Ramos, Jaime A.; Paiva, Vítor H.; Martins, Jorge; Almeida, Ana Margarida Pisco; Palma, Jorge; Andrade, Pedro J.; Peste, Filipa; Trigo, Sandra; Antônio, Luís

doi:10.1650/0010-5422(2006)108[366:iaadit]2.0.co;2

Cited by 16 publications

(28 citation statements)

References 14 publications

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“…Higher feeding activity and success in 2003 than 2004 and 2005 accords with higher colony size and reproductive success reported for that year by Medeiros et al . (2007), which in turn may be related to a higher consumption of pelagic prey in 2003 (Catry et al . 2006).…”

Section: Discussionmentioning

confidence: 99%

“…The diet of many tern species (Fraser 1997, Ramos et al . 1998, McGinnis & Emslie 2001, Nisbet 2002), including Little Terns (Fasola & Bogliani 1990, Taylor & Roe 2004, Catry et al . 2006, Paiva et al .…”

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confidence: 99%

“…2006, Paiva et al . 2006a, 2006b), has been quite well studied but the relationship between the occurrence of foraging Little Terns and the factors that influence the availability of their estuarine and marine prey has received little attention (Catry et al . 2006, Paiva et al .…”

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confidence: 99%

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Foraging habitat selection by Little Terns Sternula albifrons in an estuarine lagoon system of southern Portugal

Paiva

Ramos

Martins

et al. 2007

Ibis

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We assessed the effects of environmental variables on the distribution and feeding behaviour of adult Little Terns Sternula albifrons in Ria Formosa Natural Park, Algarve, southern Portugal, in different foraging habitats (main lagoon, salinas and sea) during the breeding seasons, April-July, of 2003-05. Foraging density was higher in the lagoon than in the sea, and at low tide. The number of foraging individuals at sea was independent of tide. Individual Little Terns foraged further from the nearest breeding colony in April and May (courtship feeding and incubation) than in June and July (chick-rearing). During intermediate tidal phases, individuals foraged further from the nearest colony, and followed main lagoon channels, perhaps because stronger currents increased prey availability. Diving activity and foraging success were higher in 2003 than 2004 or 2005, perhaps because of greater availability of marine prey in 2003. Diving rate was higher in July (when independent juveniles began learning how to forage) but diving success was higher in June (chick-rearing) than in other months. The variables selected by the final logistic models reflected four basic needs for the selection of feeding habitats by Little Terns: (1) association between foraging individuals, (2) areas with abundant feeding resources, (3) entrance channels and main lagoon channels with strong currents, and (4) the proximity to areas with alternative feeding resources, the salinas. Areas subjected to strong human pressure were avoided by foraging Little Terns.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Foraging habitat selection by Little Terns Sternula albifrons in an estuarine lagoon system of southern Portugal

Paiva

Ramos

Martins

et al. 2007

Ibis

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“…Prey commonly found in all three studies included larval blenny, mullet, anchovy and needlefish. The diet of the Damara tern chicks under study was similar to that described by Catry et al (2006) for fish fed to little tern chicks (e.g. Artherina sp., Mugil sp., Blennidae, Gobidae), by Elliot et al (2007) for the diet of the California least tern Sterna antillarum browni (e.g.…”

Section: Chick Diet and Energy Contentmentioning

confidence: 99%

Prey capture success and chick diet of Damara ternsSterna balaenarumin Namibia

Braby

Underhill

Simmons

2011

African Journal of Marine Science

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Feeding terns are affected by a variety of environmental conditions. We studied prey capture success of Damara terns Sterna balaenarum in relation to six variables at two breeding colonies in southern Namibia: tidal phase, wind speed, water clarity, cloud cover, water depth and locality. Damara terns dived most successfully at high tide and least successfully at low tide. Prey capture success improved whereas total dive rate decreased with increasing wind speed. Prey capture success was highest in the least turbid water, but was not significantly affected by cloud cover or water depth, and there was no significant difference in dive success between localities. The diet of Damara tern chicks were studied throughout Namibia. Of 55 prey items collected, Cape silverside Atherina breviceps, southern mullet Liza richardsonii and Cape anchovy Engraulis encrasicolus were among the most abundant prey species. At least nine prey species were found in the diet of Damara tern chicks that had not been previously reported from Namibian waters

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“…Due to high levels of damage to invertebrate prey specimens from the ingestive and digestive processes and the paucity of some samples, we made no effort to quantify the exact number or mass of terrestrial invertebrates found within a particular laughing gull stomach as these numbers would be subject to large errors (Duffy and Jackson, 1986;Rosenberg and Cooper, 1990;Granadeiro et al, 2002). Data analyses.-We calculated frequency of occurrence (%) as the number of gulls that had consumed a given terrestrial insect taxon (e.g., family), expressed as a percentage of the total number of all laughing gulls (n 5 1053) collected and examined (Duffy and Jackson, 1986;Catry et al, 2006). We calculated the percent taxon occurrences of a given terrestrial insect taxon (e.g., order) as the number of individual occurrences of that taxon, expressed as a percentage of the total number of all taxon occurrences (Duffy and Jackson, 1986;Granadeiro et al, 2002).…”

Section: Methods Study Areamentioning

confidence: 99%

Temporal Variation in Terrestrial Invertebrate Consumption by Laughing Gulls in New York

Bernhardt

Kutschbach-Brohl

Washburn

et al. 2010

The American Midland Naturalist

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ABSTRACT.-Laughing gulls (Larus atricilla) are commonly found in many areas of North America and little is known about their diet, particularly in coastal-urban interfaces where gull-aircraft collisions can be a serious concern. The objective of this study was to describe and quantify the consumption of terrestrial invertebrates by laughing gulls at a coastal-urban interface in the northeastern United States. We examined the stomach contents of laughing gulls (n 5 1053) collected during wildlife damage management operations at John F. Kennedy International Airport during the summers of 2003 and 2004. Terrestrial invertebrates consumed by laughing gulls represented 2 taxonomic phyla, 4 classes, 15 orders and 40 families. Beetles (Coleoptera) and ants (Hymenoptera) were the most common terrestrial invertebrates consumed by laughing gulls. We found evidence of temporal (i.e., monthly) variation in the frequency of occurrence of terrestrial insects in laughing gull diets. Laughing gull gender and age did not influence the frequency of occurrence of terrestrial insects in gull diets. Terrestrial environments (e.g., areas of turfgrass) appear to provide important foraging locations and food resources for laughing gulls in coastal-urban areas. This information is important for developing effective management approaches to reduce human-gull conflicts, such as gull-aircraft collisions at coastal airports.

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Intercolony and Annual Differences in the Diet and Feeding Ecology of Little Tern Adults and Chicks in Portugal

Cited by 16 publications

References 14 publications

Foraging habitat selection by Little Terns Sternula albifrons in an estuarine lagoon system of southern Portugal

Foraging habitat selection by Little Terns Sternula albifrons in an estuarine lagoon system of southern Portugal

Prey capture success and chick diet of Damara ternsSterna balaenarumin Namibia

Temporal Variation in Terrestrial Invertebrate Consumption by Laughing Gulls in New York

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