Assessment of the importance of fish predation versus copepod predation on life history traits of Daphnia hyalina

Caramujo, Maria-José; Crispim, Maria Cristina; Boavida, María José

doi:10.1007/978-94-011-4964-8_27

Cited by 17 publications

(21 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The evidence that C. numidicus was a prey for A. robustus was pointed out by Caramujo et al (1997) in a reservoir located at the Portuguese part of Tejo River watershed where the two species coexisted. However, in Azibo, A. robustus densities were very low and the potential predation pressure over C. numidicus or over some of the cladocerans might have had no significant impact on those populations.…”

Section: Discussionmentioning

confidence: 99%

“…However, in Azibo, A. robustus densities were very low and the potential predation pressure over C. numidicus or over some of the cladocerans might have had no significant impact on those populations. According to several authors, in the cladoceran assemblage largebodied cladocerans were especially susceptible to fish predation (Beklioglu & Moss 1996, Caramujo et al 1997, Lampert & Sommer, 1997. Siegfried & Kopache (1984) observed that the increased predation by 0+ fish and by planktivorous fish at the beginning of summer lead to a decline in Daphnia population.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

What factors affect the pelagic cladocerans of the meso-eutrophic Azibo Reservoir?

Geraldes¹,

Boavida

2004

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

What factors affect the pelagic cladocerans of the meso-eutrophic Azibo Reservoir?

Geraldes¹,

Boavida

2004

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

“…Caramujo et al (1997) found that the length of the tail spine in juvenile D. hyalina was greater in enclosures containing large numbers of the predacious cyclopoid copepod Acanthocyclops robustus than outside the enclosures where the daphnids were exposed to fish predation. The tail spine to body ratio was positively correlated with the densities of A. robustus.…”

Section: Length Of Tail Spinementioning

confidence: 92%

Morphological defenses induced in situ by the invertebrate predator Chaoborus: comparison of responses between Daphnia pulex and D. rosea

Sell

2000

Oecologia

View full text Add to dashboard Cite

The presence of plankton predators may induce altered morphology in their potential prey. To date, the mechanism of induction and adaptive value of such defensive responses have been examined in the laboratory. This study investigated the morphological defense structures induced by the invertebrate predator Chaoborus in two coexisting Daphnia species, D. pulex and D. rosea, in the field. In Piscivore Lake (Gräfenhain, Germany), continuous and intense biomanipulation had led to near elimination of planktivorous fish and greatly increased abundances of Chaoborus (up to >10 larvae l). Here, the density of Chaoborus was manipulated within the lake by an enclosure/exclosure setup and resulting morphological responses of Daphnia spp. were investigated in situ. Three replicate enclosures (4.6 m) contained no Chaoborus (predator exclusion bags), whereas Chaoborus entered three others at ambient densities (predator enclosures). In both species of Daphnia, formation of neckteeth and elongation of the tail spine were recorded in the predator enclosures, but not in the predator exclusion treatments. Additionally, D. rosea responded to predator inclusion with an increase of the size at first reproduction. Despite the induced defense structures, the presence of Chaoborus caused increased mortality of both Daphnia species. In addition, Chaoborus affected the coexistence of the two populations of Daphnia by causing higher relative mortality in D. rosea. Neckteeth formation was always more pronounced in D. pulex than in D. rosea of the same size. Neckteeth were induced specifically in vulnerably sized juvenile instars of D. pulex, but were not found in all vulnerable instars of D. rosea. In D. rosea, neckteeth were few or absent in the ephippial hatchlings, and neckteeth formation ceased before juveniles reached a body size outside the range that larger larval stages of Chaoborus could ingest. This study provides the first experimental demonstration in the field of the inducibility of morphological defense structures in Daphnia at ambient densities of Chaoborus larvae, and quantifies these in situ responses. This expands on earlier observations of a correlation between predator density in the field and the expression of neckteeth in Daphnia. The term "maximum size for neckteeth formation" (MSNF) is defined as the limit in body size above which no production of neckteeth was evident. This limit was used to distinguish the size classes of Daphnia that show a sensitive response to Chaoborus kairomone. This new term may be used for further comparisons among species and among different types of predator-induced responses as well as for the evaluation of the adaptive value of defense structures.

show abstract

“…The number of individuals analysed varied among samples (from 20 to 100) and depended on the density of the population. Sizes at maturity for individuals of the Daphnia 'complex' were determined according by Caramujo et al 1997.…”

Section: Methodsmentioning

confidence: 99%

Population dynamics of Chaoborus flavicans and Daphnia spp.: effects on a zooplankton community in a volcanic eutrophic lake with naturally high metal concentrations (L. Monticchio Grande, Southern Italy)

Leoni¹,

Garibaldi²

2009

J Limnol

View full text Add to dashboard Cite

show abstract

Assessment of the importance of fish predation versus copepod predation on life history traits of Daphnia hyalina

Cited by 17 publications

References 22 publications

What factors affect the pelagic cladocerans of the meso-eutrophic Azibo Reservoir?

What factors affect the pelagic cladocerans of the meso-eutrophic Azibo Reservoir?

Morphological defenses induced in situ by the invertebrate predator Chaoborus: comparison of responses between Daphnia pulex and D. rosea

Population dynamics of Chaoborus flavicans and Daphnia spp.: effects on a zooplankton community in a volcanic eutrophic lake with naturally high metal concentrations (L. Monticchio Grande, Southern Italy)

Contact Info

Product

Resources

About