Ultraviolet polarized light and individual condition drive habitat selection in tropical damselflies and dragonflies
Por:
Ensaldo-Cardenas, Angelica S., Rocha-Ortega, Maya, Schneider, David, Robertson, Bruce A., Cordoba-Aguilar, Alex
Publicada:
1 oct 2021
Resumen:
Artificial objects can polarize ultraviolet light sources to a higher
degree than natural objects like water bodies. This can induce a strong
attraction response by insects that use such cues as proxies of habitat
suitable for reproduction. Visible range polarized light (VRPL) can
create evolutionary traps for aquatic insects, but it remains unclear
whether insects can use ultraviolet polarized light (UVPL) as a habitat
selection cue or if UVPL pollution can create evolutionary traps for
aquatic insects like VRPL can. Odonate (dragonflies and damselflies)
insects require an aquatic habitat to perform their mating and
egg-laying behaviours yet they also perform such behaviours on
artificial surfaces (i.e. metal pieces). We measured the preference for
UVPL versus VRPL via exposing three species of odonates (Enallagma
praevarum, Ischnura denticollis and Sympetrum illotum) to experimental
test surfaces differing in these visual cues and assessing behavioural
preference via differences in mating behaviour, body condition (i.e.
lipid and protein content and body size) and visual acuity (based on eye
width size). Ischnura denticollis performed more diverse mating
behaviours in association with the VRPL treatment, while S. illotum
preferentially exhibited these behaviours in association with the UVPL.
Ischnura denticollis individuals associated with the preferred habitat
had lower lipid reserves, smaller body size and larger eyes, while
habitat preference was unrelated to individual condition and morphology
in E. praevarum and S. illotum. These results suggest intra-and
interspecific variation in trap preferences, which are related to
individual condition. They also show that UVPL is a cue that odonates
use in habitat selection that has the potential to create evolutionary
traps, suggesting conservation problems for aquatic insects that rely
upon it to locate water bodies. (c) 2021 The Association for the Study
of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.
Filiaciones:
Ensaldo-Cardenas, Angelica S.:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
Rocha-Ortega, Maya:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
Schneider, David:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
Robertson, Bruce A.:
Bard Coll, Biol Program, Annandale On Hudson, NY 12504 USA
Cordoba-Aguilar, Alex:
Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Evolut, Mexico City, DF, Mexico
UNAM, Inst Ecol, Ciudad Univ,Circuito Exterior S-N, Ciudad De Mexico 04500, Mexico
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