Feeding behavior of nauplii of the genus Eucalanus (Copepoda, Calanoida)

Paffenhöfer, GA; Lewis, K.D.

doi:10.3354/meps057129

Cited by 57 publications

(44 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although investigators have tethered some plankton (Paffenhöffer & Lewis 1989, Thetmeyer & Kils 1995, Acosta & Butler 1999, this approach has been uncommon due to the difficulties of manipulating tethered plankton in the field (but see Acosta & Butler 1999). Tethering small plankton (i.e.…”

Section: Abstract: Invertebrate Larvae · Mysids · Mysidium Columbiaementioning

confidence: 99%

“…For nonplanktonic organisms, tethering experiments, in which organisms are attached to a restraining device (tether) and placed in the field, have been a powerful tool for evaluating among-habitat differences in attack rates or potential predation pressure (Aronson & Heck 1995, and references within). Although investigators have tethered some plankton (Paffenhöffer & Lewis 1989, Thetmeyer & Kils 1995, Acosta & Butler 1999, this approach has been uncommon due to the difficulties of manipulating tethered plankton in the field (but see Acosta & Butler 1999). Tethering small plankton (i.e.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Plankton tethering to assess spatial patterns of predation risk over a coral reef and seagrass bed

Bullard¹,

Hay²

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Difficulties associated with manipulating plankton in situ have limited the ability of investigators to assess among-habitat variation in predation risk for plankton. We used plankton tethering units (PTUs) to tether zooplankton in a variety of reef and seagrass habitats, and used field and laboratory assays to test PTUs for tethering artifacts. Tethering did not affect the survivorship of 5 species of plankton (sizes <1 to 6 mm), indicating that the method works with a range of planktonic organisms. We then used the reef mysid Mysidium columbiae in additional assays and found that: (1) mysids remained on PTUs unless they were attacked by predators; (2) PTUs did not prevent planktivorous fishes from consuming tethered mysids; (3) untethered mysids commonly evaded predators, while mysids on PTUs did not; (4) the same types of predators consumed untethered and tethered mysids in the field; and (5) fishes were neither attracted to nor repelled from PTUs. We used PTUs and mysids to assess predation risk for plankton over various coral reef or seagrass habitats. Risk of attack varied among habitats and was correlated with abundance of planktivorous fishes. On the reef, attack rates were most intense over a topographically complex reef ledge, less intense over the less structurally complex center of the reef, and least intense over a structurally simple sand plain. Within the seagrass bed, attack rates were highest at the edge of the bed and less intense to the center of the seagrass bed and over an adjacent sand plain. Thus, attack rates at these sites varied tremendously over small spatial scales (meters). KEY WORDS: Invertebrate larvae · Mysids · Mysidium columbiae · Planktivory · Tethering · ZooplanktonResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 225: 17-28, 2002 rates or potential predation pressure (Aronson & Heck 1995, and references within). Although investigators have tethered some plankton (Paffenhöffer & Lewis 1989, Thetmeyer & Kils 1995, Acosta & Butler 1999, this approach has been uncommon due to the difficulties of manipulating tethered plankton in the field (but see Acosta & Butler 1999). Tethering small plankton (i.e. most plankton) has been especially difficult and rare.To work with tethered plankton, logistical problems associated with transporting tethered plankton to the field must be overcome. Tethered plankton must stay continuously submerged during transport, the tethers cannot become entangled, and the tethered plankton must be able to be deployed quickly without damage in the field. Additionally, tethering can produce biases that confound results (e.g. Peterson & Black 1994). For example, tethering can make organisms more or less susceptible to predators by affecting their behavior, apparency, or mortality. In addition, complex interactions can occur between tethers and treatments if tethers differentially affect the susceptibility of tethered organisms in different habitats (Peterson & Black 1994). Such interactions will often ...

show abstract

Section: Abstract: Invertebrate Larvae · Mysids · Mysidium Columbiaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plankton tethering to assess spatial patterns of predation risk over a coral reef and seagrass bed

Bullard¹,

Hay²

2002

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

show abstract

“…Previous observations have shown that the swimming pattern changes little throughout copepodite development (e.g. Van Duren & Videler 1995, Paffenhöfer et al 1996 or that, in some species, early copepodite stages have different swimming behaviours (Paffenhöfer & Lewis 1989, Paffenhöfer et al 1996.…”

Section: Introductionmentioning

confidence: 99%

“…Nauplii generally have an oval-shaped body, and they use the second antennae and mandibles for feeding and swimming (Björnberg 1986, Paffenhöfer & Lewis 1989, Mauchline 1998. Copepodites resemble adults with complete sets of mouth parts, but exhibit progressive development of the appendages and segmentation with increase of body size.…”

Section: Introductionmentioning

confidence: 99%

Ontogenetic change of foraging behaviour during copepodite development of Acartia clausi

Takahashi¹,

Tiselius²

2005

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Swimming behaviour of copepodite stage CI to adults of the planktonic copepod Acartia clausi were observed at different food levels (0, 60, 500 and 2000 cells ml -1 ) of the diatom Thalassiosira weissflogii. Concurrent measures of clearance in bottle incubations were performed for CI and adult females. All indivuduals exhibited typical jump-sink behaviour. At low food concentrations early copepodites filtered 36% of the time, and later stages 18%, yet the increased suspension-feeding effort did not enhance their clearance rate. Older stages and adults did not show feeding-bouts at low food concentrations, which is interpreted as a switch to the ambush-feeding mode, whereby the copepods are assumed to be searching for potentially abundant larger and motile prey, for instance, ciliates. When offered no food, frequent and long jumps were observed in all stages except for CI. Search volumes during ambush feeding were estimated, and the slow sinking of early stages resulted in a small search volume as compared to that in later stages. Early copepodite stages depended to a higher degree on suspension feeding, regardless of food concentration, due to their undeveloped food searching ability. High food availability is therefore crucial for the growth and survival of early copepodite stages of A. clausi. The heavier body of later stages enhanced foraging efficiency both during suspension feeding (by gravity tethering) and in ambush feeding (by faster sinking).KEY WORDS: Swimming behaviour · Suspension feeding · Ambush feeding · Switching behaviour · Lower feeding threshold · Life history · CalanoidResale or republication not permitted without written consent of the publisher

show abstract

“…They were frequently observed to feed on diatoms and rotifers, which were plentiful in our samples. As omnivores, they were found to graze both on phytoplankton (Paffenhöfer and Lewis 1989) and protozooplankton (ciliates, heterotrophic dinoflagellates, flagellates), and rotifers (Stoecker and Egloff 1987).…”

Section: Discussionmentioning

confidence: 99%

Saccate thallus of the red alga Halosaccion glandiforme harbor diverse invertebrate fauna

Bhaduri

Wolf

2017

Int Aquat Res

View full text Add to dashboard Cite

Rocky intertidal zones are biologically diverse environments with numerous physical stressors; as such, close associations between organisms often develop to overcome such stressors and enhance survival of associates. As major components of rocky shores, macroalgae support numerous invertebrate species. In this study, we evaluated the habitat-providing role of the red alga, Halosaccion glandiforme (S.G. Gmelin) Ruprecht. This alga, also called sea sacs, is commonly found on rocky shores along the West Coast of North America. During emersion, this seaweed holds water within its saccate thallus, which can potentially serve as microhabitat for various organisms. Little is known about the composition of microfauna associated with this seaweed; as such, we documented richness and abundance of species found inside its thallus. Algal specimens were collected from Charleston, Oregon and transported to the laboratory for further analyses. Of the 119 thalli examined, 12 taxa were documented. Nematodes and copepods were the dominant taxa. Other groups represented included ostracods, turbellarians, halacarid mites, bivalves, rotifers, and three larval types (barnacle cyprids, copepod nauplii, mollusc veliger). Diatoms, crustacean molt remnants, detritus, and sand particles were also observed inside thalli. Species richness and abundance were positively correlated with thalli volume, as well as intra-thalli fluid volume. Several feeding and other behaviors of colonizers were noted; they included herbivory, predator-prey interactions, detritivory, and molting. Our findings demonstrate that H. glandiforme provide refuge for organisms from harsh environmental conditions during emersion periods, and also serve as feeding and nursery grounds for its diverse invertebrate fauna.

show abstract

Feeding behavior of nauplii of the genus Eucalanus (Copepoda, Calanoida)

Cited by 57 publications

References 14 publications

Plankton tethering to assess spatial patterns of predation risk over a coral reef and seagrass bed

Plankton tethering to assess spatial patterns of predation risk over a coral reef and seagrass bed

Ontogenetic change of foraging behaviour during copepodite development of Acartia clausi

Saccate thallus of the red alga Halosaccion glandiforme harbor diverse invertebrate fauna

Contact Info

Product

Resources

About