Effects of Mesh Size on Sieved Samples of Corophium volutator

Crewe, Tara L.; Hamilton, Diana J.; Diamond, Antony W.

doi:10.1006/ecss.2001.0795

Cited by 47 publications

(27 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Areas with suitable substrate and evidence of invertebrate activity were targeted to ensure that sufficient organisms were collected for analysis. After collection, sediment samples were sieved through a 250 m mesh (Crewe et al 2001). Retained invertebrates were live sorted into broad taxonomic groups with the aid of a dissecting microscope.…”

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

View full text Add to dashboard Cite

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...

show abstract

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

View full text Add to dashboard Cite

show abstract

“…Devido a esta heterogeneidade de hábitats e nichos, há uma variedade de métodos de captura para esses animais, entre os quais se destacam armadilhas tipo covo e pitfall, peneiras, puçás, redes, coleta manual e choque elétrico (ABELE & BLUM, 1977;FIEVET et al, 1996;CREWE et al, 2001;GARCIA et al, 2003;JOHNSON, 2003;ROCHA & BUENO, 2004;MOSSOLIN et al, 2006).…”

unclassified

“…Comparações entre metodologias de coleta são importantes para elucidar questões referentes às metodologias de captura mais eficientes para determinado grupo zoológico, fornecer informações sobre o tipo de fauna amostrada em cada uma das metodologias, à abundância relativa, à proporção e tamanho dos indivíduos, ou ainda detectar vícios de amostragem (MONTAGUE, 1980;FIEVET et al, 1996;MAYFIELD et al, 1999;HYVÖNEN & NUMMI, 2000;CREWE et. al., 2001;GARCIA et al, 2003;JOHNSON, 2003).…”

unclassified

Diferença entre dois métodos de coleta utilizados na captura de crustáceos decápodes em um rio da Estação Ecológica Juréia-Itatins, São Paulo

Rocha

2010

Iheringia, Sér. Zool.

View full text Add to dashboard Cite

ABSTRACT. Differences between two methods used for sampling decapod crustaceans in a stream at Juréia-Itatins Ecological Station, state of São Paulo, Brazil. Sampling collections were taken quarterly from Fall 2000 to Summer 2001 at Juréia-Itatins Ecological Station using two different sampling methods (hand sieve and traps). Comparing both sampling methods one can verify differences in faunal composition, richness, degree of dominance, evenness and size and number of individuals. Moreover, the sex ratio of Macrobrachium acanthurus (Wiegmann, 1836) may differ according to the sampling method. Decapod crustaceans are known to inhabit a great variety of habitats and niches, therefore to obtain an effective qualitative and/or quantitative sampling, in which the majority of decapod species are collected, the use of more than one sampling method is recommended.KEYWORDS. Decapoda, Palaemonidae, Atyidae, Grapsidae, ecology. RESUMO. Durante os anos 2000 e 2001 foram realizadas coletas sazonais de crustáceos decápodes em dois pontos de um rio na EstaçãoEcológica Juréia-Itatins, utilizando-se duas metodologias distintas (peneira e armadilha). Comparando-se ambos os métodos de coleta, foram constatadas diferenças quanto à composição e riqueza da carcinofauna capturada, grau de dominância e equitatividade, bem como tamanho e número de indivíduos coletados. Além disso, as razões sexuais de Macrobrachium acanthurus (Wiegmann, 1836) podem diferir dependendo do método de coleta utilizado. Devido à grande variedade de hábitats e hábitos dos crustáceos, pode-se inferir que, para um levantamento qualitativo e/ou quantitativo eficaz e apurado da comunidade de crustáceos decápodes dulcícolas de um determinado rio, é recomendado o uso de mais de um método de coleta.

show abstract

“…Our sampling protocol ensured that we had good replication near-shore, mid-shore, and far from shore (1), good representation over the whole mudflat (1 & 2), and samples at small spatial scales (3). Once collected, core samples were sieved through a 250 μm mesh (Crewe et al 2001) and preserved in 95% ethanol. The number of Corophium volutator individuals in each sample was later quantified under a dissecting microscope.…”

Section: Sampling Programmentioning

confidence: 99%

“…The mud contained in the pipes was scooped out to the depth of the hypoxic layer and replaced by mud collected near each station and sieved through 250 μm mesh to remove all Corophium volutator individuals (Crewe et al 2001) and other macro-organisms. At each station, 6 experimental units were deployed about 50 cm off the sides of a fixed wooden plank, used for walking to minimize disturbance by workers.…”

Section: Sampling Programmentioning

confidence: 99%

Movement patterns drive within-mudflat distribution of an intertidal amphipod

Drolet¹,

Barbeau²

2011

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Spatial structuring in species distribution can be caused by effects of biotic or abiotic factors on the vital rates (survival, growth or reproduction) or movement of individuals. Here, we studied the distribution patterns of a dominant infaunal invertebrate, the amphipod Corophium volutator, on an intertidal mudflat and evaluated the relative contribution of vital rates and movement on the formation of intermediate-scale patterns (10 to 100 m). We found a clumped distribution at scales ranging from 0.2 to 100 m and occasionally the presence of large-scale gradients. At intermediate scales, variation in density in the mud associated better with variation in movement variables (density of swimmers and immigration) than demographic variables. Predictions from local population models not including migration often largely underestimated increases in local density, leaving immigration as the only mechanism explaining variation in density. Amphipod swimming was directed, and the direction of swimming corresponded to overall density gradients observed on the mudflat. We concluded that movement of C. volutator is an important process causing and maintaining intermediate-scale distribution patterns. Spatial variability in supply of individuals, likely linked to timing of swimming coupled with hydrodynamic conditions, translates into notable variation in population density distributions.

show abstract

Effects of Mesh Size on Sieved Samples of Corophium volutator

Cited by 47 publications

References 18 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

Diferença entre dois métodos de coleta utilizados na captura de crustáceos decápodes em um rio da Estação Ecológica Juréia-Itatins, São Paulo

Movement patterns drive within-mudflat distribution of an intertidal amphipod

Contact Info

Product

Resources

About