A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
NECK SPINE PROTECTS DAPHNIA-PULEX FROM PREDATION BY CHAOBORUS, BUT INDIVIDUALS WITH LONGER TAIL SPINE ARE AT A GREATER RISK
Tekijät: REPKA S, WALLS M, KETOLA M
Kustantaja: OXFORD UNIV PRESS UNITED KINGDOM
Julkaisuvuosi: 1995
Lehti:: Journal of Plankton Research
Tietokannassa oleva lehden nimi: JOURNAL OF PLANKTON RESEARCH
Lehden akronyymi: J PLANKTON RES
Vuosikerta: 17
Numero: 2
Aloitussivu: 393
Lopetussivu: 403
Sivujen määrä: 11
ISSN: 0142-7873
DOI: https://doi.org/10.1093/plankt/17.2.393
Tiivistelmä
We tested the prey preference of Chaoborus sp. on Daphnia pulex with different defensive morphologies. The protective function of inducible morphological defences, such as neck spine and longer tail spine, was evaluated. Second instar D.pulex individuals of two clones differing in their strength of neck spine induction were offered as prey to both Chaoborus obscuripes and Chaoborus flavicans. We used logistic regression analysis to evaluate the effect of morphometry on the vulnerability of Daphnia. The presence of a neck spine and increased total length protected D.pulex from Chaoborus predation. However, individuals with a longer tail spine were more vulnerable to Chaoborus predation. Chaoborus obscuripes was able to eat daphnids with a neck spine due to the larger gape size of this chaoborid. The smaller species C.flavicans almost always ate prey with no neck spine.
We tested the prey preference of Chaoborus sp. on Daphnia pulex with different defensive morphologies. The protective function of inducible morphological defences, such as neck spine and longer tail spine, was evaluated. Second instar D.pulex individuals of two clones differing in their strength of neck spine induction were offered as prey to both Chaoborus obscuripes and Chaoborus flavicans. We used logistic regression analysis to evaluate the effect of morphometry on the vulnerability of Daphnia. The presence of a neck spine and increased total length protected D.pulex from Chaoborus predation. However, individuals with a longer tail spine were more vulnerable to Chaoborus predation. Chaoborus obscuripes was able to eat daphnids with a neck spine due to the larger gape size of this chaoborid. The smaller species C.flavicans almost always ate prey with no neck spine.
Turun yliopiston Tutkimustietojärjestelmän portaali