Results 31 to 40 of about 4,398 (225)

Predation rate of dragonfly (Odonata: Libellulidae) on tilapia (Oreochromis niloticus Linnaeus 1758) and the availability of alternative preys (Insecta: Diptera: Chironomidae) to increase fish survival

open access: yesActa Scientiarum: Biological Sciences, 2023
The objective of this work was to evaluate the predation rates of two genera of Odonata Miathyria Kirby, 1889 and Erythemis Hagen, 1861 in post-larviculture of tilapia with and without availability of Chironomidae.
Murilo Henrique Tank Fortunato   +5 more
doaj   +1 more source

Evolutionary ecology of opsin gene sequence, expression and repertoire. [PDF]

open access: yes, 2017
Linking molecular evolution to biological function is a long-standing challenge in evolutionary biology. Some of the best examples of this involve opsins, the genes that encode the molecular basis of light reception.
Owens, Gregory L, Rennison, Diana J
core   +1 more source

Chronic Exposure to High Concentrations of Road Salt Decreases the Immune Response of Dragonfly Larvae

open access: yesFrontiers in Ecology and Evolution, 2019
Salinization of freshwater ecosystems, due to the application of road salts, is recognized as a potential threat to aquatic communities. Much of the research on the impact of salinity has focused on performance metrics in vertebrates, including ...
Racquelle S. Mangahas   +4 more
doaj   +1 more source

Phenology determines seasonal variation in ectoparasite loads in a natural insect population [PDF]

open access: yes, 2010
1. The extent to which individuals are parasitised is a function of exposure to parasites and the immune response, which in ectotherms may be associated with temperature. 2.
Andrés   +68 more
core   +1 more source

Dragonflies and Damselflies (Odonata: Insecta) of Keoladeo National Park, Rajasthan, India

open access: yesJournal of Threatened Taxa, 2017
The present study was undertaken to examine the diversity, occurrence and distribution pattern of damselflies and dragonflies (Odonata) in Keoladeo National Park from 2010–2015.
Dheerendra Singh   +2 more
doaj   +1 more source

Macromia alleghaniensis (Odonata: Macromiidae): New For Michigan, with Clarifications of Northern Records [PDF]

open access: yes, 2017
An Alleghany River Cruiser, Macromia alleghaniensis Williamson (Odonata: Macromiidae), collected in Cass County, Michigan on 18 June 2014, represents the first record of the species for the state, as well as the northernmost unequivocal record in North ...
Craves, Julie A, O’Brien, Darrin S
core   +2 more sources

Odonate diversity of Nalsarovar Bird Sanctuary - a Ramsar site in Gujarat, India

open access: yesJournal of Threatened Taxa, 2018
Odonate diversity of Nalsarovar Bird Sanctuary, a Ramsar site in Gujarat, was studied between January 2015 and July 2017.  A total of 46 species belonging to two suborders, six families, and 27 genera were recorded, which included 14 species of Zygoptera
Darshana M. Rathod, B. M. Parasharya
doaj   +1 more source

The impact of climate-induced distributional changes on the validity of biological water quality metrics [PDF]

open access: yes, 2010
We present data on the distributional changes within an order of macroinvertebrates used in biological water quality monitoring. The British Odonata (dragonflies and damselflies) have been shown to be expanding their range northwards and this could ...
Harvey, IF, Hassall, C, Thompson, DJ
core   +1 more source

An observation on the Odonata fauna of the Asansol-Durgapur Industrial Area, Burdwan, West Bengal, India

open access: yesJournal of Threatened Taxa, 2016
The present investigation was undertaken as a pilot study to examine the diversity, occurrence and distribution pattern of dragonflies and damselflies (Odonata) from the selected study sites of the Asansol-Durgapur industrial area of Burdwan District of ...
Amar Kumar Nayak, Utpal Singha Roy
doaj   +1 more source

Study design and mark-recapture estimates of dispersal: A case study with the endangered damselfly Coenagrion mercuriale [PDF]

open access: yes, 2012
Accurate data on dispersal ability are vital to the understanding of how species are affected by fragmented landscapes. However, three factors may limit the ability of field studies to detect a representative sample of dispersal events: (1) the number of
Hassall, C, Thompson, DJ
core   +1 more source

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