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I am searching for good quality pictures of the following "primeval forest relict beetles" of Europe (in German: Urwaldrelikte): Ampedus auripes (Elateridae) Ceruchus chrysomelinus...

10 November 2018 6,692 7 View

Can anyone identify this dragonfly from Eastern China?

The picture was taken close to Hangzhou (Eastern China).

05 June 2018 4,445 11 View

Can anyone provide samples of Nitella/Tolypella (Characeae) for phylogenetic analyses?

We are working on phylogeny of the European Characeae (green algea). We are still missing the following taxa: Nitella capillarisNitella flexilisTolypella intricata Can anyone provide the samples...

04 May 2017 2,038 0 View

Can anyone identify these insects / Coleoptera from Costa Rica (Tapanti NP)?

The three Coleoptera species have been observed and photographed in April 2016 in Tapanti National Park (Costa Rica) - in mountainous forest with Oreomunnea and Alfaroa species (both Juglandaceae)...

09 October 2016 3,207 18 View

Can anyone identify these Crustacea/Decapoda from Iriomote Island (Southern Ryukyu, Japan)?

The crabs were observed and pictures were taken on oceanic shore and in mangroves of the Iriomote Island (Southern Ryukyu, Japan).

07 August 2015 316 7 View

Does anybody know any gymnosperm which is an obligate aquatic organism - other than Retrophlylum minus (Podocarpaceae) from New Caledonia?

In our recent global analysis of all extant gymnosperms we concluded that there is only one obligate "aquatic gymnosperm" taxon among ca. 1000 known species of this ancient plant group. Are there...

31 December 2014 3,314 3 View

Who knows this organism/phenomenon?

Found in Switzerland, close to a river on humid soil in December 2014. Fungal or algal organism?

31 December 2014 4,836 5 View

Why do some barks peel? What are the advantages of exfoliating for a tree?

01 January 1970 294 19 View

Is the dispersal unit of the relict tree genus Zelkova unusual/unique (twig fragment with dried leaves and fruits)?

01 January 1970 4,083 5 View

Binary Logistic Generalized Linear Mixed model in SPSS. Is it doable?

I want to analyses the proportion of swimming sperm of three species of fish in two salinities. To analyse the proportion of swimming sperm in a Generalized Linear Model, I would use a Binary...

03 March 2021 2,297 3 View

Would fecal samples stored at -20C for over a year impact metagenomic analysis?

Dear All, I have access to some rodent fecal samples that have been stored at -20C instead of -80C. Anyone have experience with the impact of stowage condition on comparative metagenomic analysis...

01 March 2021 2,512 1 View

Does anyone know how to plot my station to a section plot on Ocean Data View (ODV)?

I made a vertical section plot with WOA .nc file on ODV, and now I want to plot my stations (csv. file) in it. Does anyone know how to import my points to the section? They are two different...

01 March 2021 3,610 1 View

Tooth extraction and subsequent dental implant placement in Sprague-Dawley rats induce differential changes in anterior digastric myofibre size and ?

01 March 2021 7,254 3 View

Is there a method of determining feed digestibility without the need to re-pellet the feed?

I am aiming to determine the ADC values of a commercial fish feed, but I do not have a steam pelleter or extruder available to me. Ideally, the pellets could be coated with some inert marker....

28 February 2021 7,967 3 View

Good morning research fellows, Has anyone worked with senna alata plant extract on any kind of fish?

Literatures on the piscicidal effect of sennaa alata is scanty. if you have any related litrature either in the bark, leaves or roots used as treatment to any aquatic organism please kindly help...

28 February 2021 9,138 2 View

Can Ethovision store the generated data and video recordings directly to NAS system?

The size of data generated by Ethovision is huge. Having NAS system for data storage seems to be a good option, I am wondering whether Ethovision can directly store the data to the NAS system...

27 February 2021 6,350 2 View

Is IMPACT FACTOR justified in case of Taxonomy?

There is huge pressure of getting good impact factor on scholars now a days. On the other hand Taxonomy is a very dry subject and the concerned papers can only get citation in same group of organism.

26 February 2021 5,851 1 View

Experimental Design: How deal with pseudreplicates with immunological and clinical-chemical paramaeters?

Hello everybody, I am investigating the influence of a toxinon various clinical-chemical and haematological parameters in fish. I have three treatments (control, low dose, high dose) in my...

24 February 2021 1,243 1 View

Hi i want to ask that in order to find out LC 50 (96 hours) of particular toxin for fish. Should we keep the animals with food or without food?

if we expose the fish after acclimatization to particular toxin in order to find out LC 50 (96 hours).Should we keep the fish off feed or with feed for that duration. Some literature show that...

24 February 2021 357 2 View