Rising temperature accelerates the responses of inducible anti-predator morphological defenses of Ceriodaphnia cornuta but decreases the responsive intensity

An intensive study of cladoceran diversity in Lake Kud-Thing, a Ramsar site of Bueng Kan Province, Thailand, was conducted. One hundred and twenty-five qualitative samples were collected from 15 localities during the period from June 2012 to November 2014. A total of 58 species belonging to 38 genera was recorded. Three species, Chydorus idrisi Sinev 2014, Karualona kwangsiensis (Chiang 1963) and Streblocerus cf. serricaudatus (Fisher 1849) are new records for Thailand. The most species rich family was Chydoridae (32 species, 55% of the encountered species in the lake) followed by Sididae (8 species, 14%) and Macrothricidae (8 species, 14%) while only a single species of Ilyocryptidae was observed. The most frequently encountered planktonic species were Ceriodaphnia cornuta Sars 1885, Bosmina cf. meridionalis Sars 1904 and Ephemeroporus barroisi (Richard 1894). A newly described chydorid, Anthalona spinifera Tiang-nga, Sinev & Sanoamuang 2016, was also recorded from this lake. The number of cladocerans recorded in this study is remarkably higher than that of previous studies in other natural lakes (17–40 species) within Thailand. In addition to earlier records, the number of cladocerans of Lake Kud-Thing has been updated to 62 species, about two times higher than that of other lakes in this region. Thus, our results suggest that Lake Kud-Thing is one of the biodiversity hotspots for Cladocera of Southeast Asia.

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Onset of kairomone sensitivity and the development of inducible morphological defenses in Daphnia pulex

Hydrobiologia ◽

10.1007/s10750-016-2809-4 ◽

2016 ◽

Vol 779 (1) ◽

pp. 135-145 ◽

Cited By ~ 13

Author(s):

Linda C. Weiss ◽

Esther Heilgenberg ◽

Lisa Deussen ◽

Sina M. Becker ◽

Sebastian Kruppert ◽

...

Keyword(s):

Daphnia Pulex ◽

Morphological Defenses

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Water mite predation on zooplankton of a tropical lake

Brazilian Journal of Biology ◽

10.1590/s1519-69842002000400002 ◽

2002 ◽

Vol 62 (4a) ◽

pp. 565-571 ◽

Cited By ~ 12

Author(s):

C. R. CASSANO ◽

M. S. M CASTILHO-NOLL ◽

M. S. ARCIFA

Keyword(s):

Laboratory Experiments ◽

Average Rate ◽

Dorsal Side ◽

Tropical Lake ◽

Water Mite ◽

Predatory Activity ◽

Paulo State ◽

Direct Observations ◽

Mite Predation ◽

Ceriodaphnia Cornuta

Water mite (Krendowskia sp.) predation on zooplanktonic species from Lake Monte Alegre (São Paulo State, Brazil) was tested in laboratory experiments. One cladoceran, Daphnia gessneri, two copepods, Tropocyclops prasinus and Thermocyclops decipiens, and Chaoborus larvae III and IV were supplied as prey to adult mites. The cladoceran Ceriodaphnia cornuta was used in the experiment with mite nymphs. Only D.gessneri was preyed on by mites, at an average rate of 7 ind./mite/day, at 23-24ºC. Although Chaoborus was not eaten by the predator in the experiment, in direct observations older larvae were seen to be seized by several mites, both predators and prey sinking to the bottom of the vessel. Adult Daphnia was grabbed by its dorsal side, swimming together with the mite. There was an increase in predatory activity two hours after sunset.

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Correction for Laforsch et al., An acoustic microscopy technique reveals hidden morphological defenses in Daphnia, PNAS 2004 101:15911-15914

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.0408763101 ◽

2004 ◽

Vol 102 (2) ◽

pp. 515-515

Keyword(s):

Acoustic Microscopy ◽

Microscopy Technique ◽

Morphological Defenses

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The interaction between antipredator behaviour and antipredator morphology: experiments with fathead minnows and brook sticklebacks

Canadian Journal of Zoology ◽

10.1139/z95-261 ◽

1995 ◽

Vol 73 (12) ◽

pp. 2209-2215 ◽

Cited By ~ 50

Author(s):

Mark V. Abrahams

Keyword(s):

Predation Risk ◽

Yellow Perch ◽

Prey Species ◽

Pimephales Promelas ◽

Antipredator Behaviour ◽

Fathead Minnows ◽

Behavioural Modification ◽

Reactive Distance ◽

Habitat Avoidance ◽

Morphological Defenses

Prey species have two fundamental strategies for reducing their probability of being killed by a predator: behavioural modification and morphological defenses. It is hypothesized that prey species which possess morphological defenses should exhibit less behavioural modification in response to predation risk than species lacking such defenses. Experiments were conducted to examine behavioural modification by armoured (brook sticklebacks, Culea inconstans) and unarmoured (fathead minnows, Pimephales promelas) prey species foraging in the presence of a predator (yellow perch, Perca flavescens). Two experiments measured habitat avoidance and reactive distance to an approaching predator. The results of these experiments were consistent with the hypothesis. Compared with fathead minnows, brook sticklebacks exhibited relatively little behavioural modification in response to the presence of a predator, both in terms of avoiding dangerous areas and in their reactive distance to an approaching predator. Sticklebacks, however, graded their reactive distance to an approaching predator in relation to both their body size and group size. These data suggest that the morphology of brook sticklebacks and their behavioural sensitivity to predation risk may allow them to efficiently exploit habitats that contain predators.

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