Stomach Analysis of a Group of Shorebirds

Reeder, William G.

doi:10.2307/1364586

Cited by 32 publications

(15 citation statements)

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“…Sediment may thus have diluted the FA concentration measured in biofilm. However, shorebirds also take in sediment when foraging; it forms up to 75% of stomach contents in some cases (Reeder 1951;Tsipoura and Burger 1999;Kuwae et al 2008;Mathot et al 2010). Thus, the FA values of biofilm determined here may reflect what is ingested by shorebirds.…”

Section: Fig 2 (A)mentioning

confidence: 79%

“…We collected biofilm by scraping it from the surface in areas in which it was visible (appearing as a thin green or green-brown mat on the surface of the mud) using a thin spatula and stored it in scintillation vials (Quinn and Hamilton 2012). Some sediment was unavoidably collected with the biofilm, but this was minimized as much as possible, and birds are also known to consume considerable sediment while feeding (Reeder 1951) so what was sampled likely resembles what birds would consume.…”

Section: Food Collectionmentioning

confidence: 99%

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Fatty acid composition and concentration of alternative food of Semipalmated Sandpipers (Calidrispusilla) in the upper Bay of Fundy, Canada

2017

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Semipalmated Sandpipers (Calidris pusilla (L., 1766)) that migrate through the upper Bay of Fundy, Canada, depend on a rich food supply to fuel their continued migration. Although past studies have reported a diet dominated by the amphipod Corophium volutator (Pallas, 1766), an animal rich in n-3 polyunsaturated fatty acids (PUFAs), recent evidence suggests that sandpiper diets are broad. This is beneficial in that it allows Semipalmated Sandpipers to respond to a changing food base, but quality of food is also important. PUFAs are important in providing the energy required by migrating birds and may play a role in migratory preparation. We assessed fatty acid (FA) concentrations and proportions in three common food items. We found that polychaetes should adequately meet the needs of migrating sandpipers in terms of FA composition. Concentrations of FAs in biofilm were low, but proportionally, n-3 PUFAs were well represented, particularly in biofilm collected in Shepody Bay, where it forms a substantial part of the sandpiper diet. Therefore, provided that birds can consume a sufficient volume of biofilm, it is also probably a suitable source of essential FAs. Our results suggest that Semipalmated Sandpipers in the Bay of Fundy can meet their FA needs with a variety of dietary options.Key words: Semipalmated Sandpiper, Calidris pusilla, diet flexibility, Bay of Fundy, Corophium volutator, biofilm, fatty acid, PUFA.Résumé : Les bécasseaux semipalmés (Calidris pusilla (L., 1766)) qui migrent par la partie supérieure de la baie de Fundy (Canada) dépendent d'un riche apport de nourriture pour soutenir la poursuite de leur migration. Si des études antérieures ont fait état d'un régime alimentaire dans lequel domine l'amphipode Corophium volutator (Pallas, 1766), un animal riche en acides gras polyinsaturés (AGPI) n-3, des observations récentes donnent à penser que les bécasseaux ont des régimes alimentaires variés. Bien qu'il s'agisse d'un avantage parce que cela permet aux bécasseaux semipalmés de réagir à des modifications de leur base alimentaire, la qualité de la nourriture est aussi importante. Les AGPI sont importants pour fournir l'énergie nécessaire aux oiseaux en migration et pourraient jouer un rôle dans la préparation à la migration. Nous avons évalué les concentrations et les proportions d'AG dans trois aliments répandus. Nous avons constaté que les polychètes devraient répondre adéquatement aux besoins des bécasseaux en migration en ce qui concerne la composition d'AG. Les concentrations d'AG dans les biofilms étaient faibles, mais, proportionnellement, les AGPI n-3 étaient bien représentés, particulièrement dans du biofilm prélevé dans la baie de Shepody, où il constitue une partie importante du régime alimentaire des bécasseaux. Ainsi, pour autant que les oiseaux puissent consommer un volume suffisant de biofilm, ce dernier constitue aussi vraisemblablement une source convenable d'AG essentiels. Nos résultats donnent à penser que les bécasseaux semipalmés dans la baie de Fundy disposent de div...

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Section: Fig 2 (A)mentioning

confidence: 79%

Section: Food Collectionmentioning

confidence: 99%

Fatty acid composition and concentration of alternative food of Semipalmated Sandpipers (Calidrispusilla) in the upper Bay of Fundy, Canada

2017

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“…Small amounts of sediment may get into the gizzards of living birds by accidental ingestion (e.g., Reeders 1951) or intake within prey (gastroliths within fish are reported; e.g., McKeown 1937), but not the large quantities seen in the Yanornis fossil or in extant herbivorous birds (Wings 2003). The large number of gastroliths in Yanornis is, however, within the range of variation for these extant herbivorous avian taxa (Wings 2003).…”

Section: Discussionmentioning

confidence: 99%

Gastroliths in Yanornis: an indication of the earliest radical diet-switching and gizzard plasticity in the lineage leading to living birds?

Zhou

Clarke

Zhang

et al. 2004

Naturwissenschaften

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Yanornis martini is an Early Cretaceous basal ornithurine bird. Its fish-eating diet was previously recognized from a discrete mass of disarticulated fish remains discovered in its abdominal region. A new complete and articulated specimen of Yanornis martini preserves abundant in-situ gastroliths such as have been associated with a herbivorous diet. We suggest that the occurrence of gastroliths in this specimen, fish remains in a second, and the lack of gastroliths in three others, is consistent with diet-switching in Yanornis martini. Incompatibility of the preserved data with explanations of the grit as an artifact of preservation or result of accidental ingestion is discussed. This discovery indicates the earliest presence of intermittent diet change (and associated gizzard plasticity) observed in extant birds seasonally and in response to changes in available food sources.

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“…For example, Forster's tern (Sterna forsteri) predominantly consumes the wetland fish species (Eagles-Smith and Ackerman, 2009), whereas California Least tern (Sterna antillarum browni, a federally endangered bird) largely consumes topsmelt and other Atherinopsidae (Elliott, 2005;Elliott et al, 2007). Arrow goby appears to be a component of the diet of mudflat feeding birds, including greater yellowleg (Tringa melanoleuca) and long-billed dowitcher (Limnodromus scolopaceus) (Goals Project, 2000;Reeder, 1951). The unique MeHg bioaccumulation pattern in silverside from North Bay Pond 2 indicates that site-specific biogeochemical conditions can develop in these isolated ponds.…”

Section: Seasonal Variationmentioning

confidence: 99%

Seasonal and annual trends in forage fish mercury concentrations, San Francisco Bay

Greenfield

Melwani

Allen

et al. 2013

Science of The Total Environment

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Stomach Analysis of a Group of Shorebirds

Cited by 32 publications

References 0 publications

Fatty acid composition and concentration of alternative food of Semipalmated Sandpipers (Calidrispusilla) in the upper Bay of Fundy, Canada

Fatty acid composition and concentration of alternative food of Semipalmated Sandpipers (Calidrispusilla) in the upper Bay of Fundy, Canada

Gastroliths in Yanornis: an indication of the earliest radical diet-switching and gizzard plasticity in the lineage leading to living birds?

Seasonal and annual trends in forage fish mercury concentrations, San Francisco Bay

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