assemblage structure in relation to basin and aquatic habitat structure in Pantanal wetlands.
For instance, odonate
wings are under natural selection, related to the aerodynamics of the flight (Kesel, 2000) while odonate
genitalia and coloration may be under the selective pressures of species recognition processes and sexual selection (Cordoba-Aguilar & Cordero, 2008), thus, the phylogenetic behavior of those character sets may be difieren
The departments are listed from those with higher number of odonate
species to those with lower number of species.
field guides are becoming common, and this book ranks among the best available.
species may be good indicator species for the quality of aquatic habitats (e.
nursei originate in different geographic areas, their presence cannot reasonably be the result of a single freak storm or event sweeping hapless odonates
from one place to another (the "push" hypothesis).
were found in the RA and BA in the winter season and the counts were nearly the same for QA during the two visits.
Abundance of odonates
during monsoon period at St I, III and IV was directly related to the luxuriant macrophytic growth (Cronin et al, 2006).
Particularly notable is the absence of odonates
, often considered to be among the major invertebrate predators of freshwater stream communities (Moss 2010).
That's probably the simplest way to distinguish the two forms of odonates
, but there are a few others apparent on up-close viewing: Dragonflies have three tiny abdominal appendages used for grasping during mating, while damselflies have four; and dragonfly forewings and hindwings have different shapes, while damselfly wings are similarly shaped front and back.
5-foot wingspans, today's odonates
range in size from the one-inch-long sphagnum sprite to the 3.
were represented by 11 species of dragon and damsel flies.
Also, the pond was patrolled by odonates
for the majority of the sampling season, but they were not captured by this method.
Less abundant although still frequent are insects that exhibit morphological aquatic adaptations for locomotion or feeding strategies, such as coptoclavid coleopterans, chresmodids, dipterans larvae, odonates
, anisopterans (see Fregenal-Martinez et al, 2007 for a summary).
have an important role in the dynamics of aquatic ecosystems and are considered one of the main predators of the littoral zone of lakes (SOTO; FERNANDES-BADILLO, 1994; LOUARN; CLOAREC, 1997; MARCO JR.