Hiram Herrera

10 Questions 8 Answers 0 Followers

Questions related from Hiram Herrera

Books of invertebrate zoology, arthropods biology and ecotoxicology?

Hi everyone. Does anybody, in your experience, has any book recommendations (of recent date) for the aforementioned topics. I have the classic "Invertebrates zoology" of Rupert and Barnes, but...

01 July 2023 9,486 4 View

What is the particle size limit for microplastics visual sorting?

Hi everyone. I'm planning on determining MP presence, size, color, shape, etc., in other words, in doing a visual sorting/characterization of MP accumulated in penaeid shrimp abdominal muscle....

29 November 2022 7,526 6 View

Are Farfantepenaeus or Litopenaeus valid genra?

Hi everyone, I often run into some discrepancies about this issue in penaeid shrimps literature since the change of shrimps of Penaeus genus to Farfantepenaeus and/or Litopenaeus. I just want to...

27 October 2022 9,952 0 View

How much volume of acid or alkali should be used for microplastic digestion?

Hello everyone. I'm doing an evaluation of microplastics in several coastal species tissue samples, and what I want to know is what is the volume ratio of solvent:tissue to be used in the...

06 October 2022 5,456 5 View

Does anyone have compared two communities using hill numbers and t- test of Hutcheson?

I want to compare my diversity results between three communities of caridean shrimps (Shannon, Simpson, and beta indices). Hill numbers is an alternative to do so given that they show to you the...

25 May 2018 1,256 1 View

How to statistically compare diversity indexes?

I'm measuring the shrimp diversity using diversity indexes such as Shannon, Simpson, Pielou and Simpson's dominance. I sampled three different sites during three seasons, so I have a total of 9...

03 October 2017 3,664 25 View

Converting Total Organic Carbon to Organic Matter in sediments

I am assessing biological impairments due to organic matter content. I did the test and have my results in percentage of organic matter. Then I wanted to compare my results and placing them...

13 July 2017 4,745 4 View

Hi, could someone please help me with the identification of a Palaemonid shrimp, genus: Leander?

I have some confusion with the differentiation of Leander paulensis and Leander tenuicornis, specifically with the character of the anterior margin of the basal antennular segment, being convex...

11 July 2016 1,047 2 View

Is it possible to use the BMWP index to crustaceans? is there some other index that use crustaceans to determine the quality of an ecosystem?

Hello: I'm working with crustaceans as bioindicators of pollution or ecological perturbation in a coastal lagoon in México. I'm analyzing the issue at several scales of biological organization....

15 April 2016 9,221 3 View

Hello everybody: Does anyone know how to calculate the geoacumulation index's background levels?

The equation goes like this Igeo = log2 [Cn/1.5Bn] where Bn is the background level of the metal n. Where are those backgrounds levels? It seems they vary from one place to another, but I'm not...

25 February 2016 3,421 7 View