17 Questions 11 Answers 0 Followers
Questions related from Hiram Herrera
Hello to everyone. I ran into this issue that most likely is a simple one. But, when performing the Sørensen-Dice index, what happens when there's no shared species with lower abundance? I mean, I...
28 February 2024 6,505 2 View
Hi everyone. I'm in the process of purchasing an stereo-microscope of the Amscope brand, specifically an SM-2T, but I ran into this thought of what if this microscope is not suitable for what...
05 October 2023 4,257 1 View
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 9,495 4 View
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 7,532 6 View
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 9,959 0 View
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 5,462 5 View
To everyone who could help me: I'm performing a length-weight relationship in two populations of a single species of caridean shrimp (they are from two distinct seasonal periods). The pooled data...
25 February 2021 4,042 0 View
Hello. I'm performing a length-weight relationship in two populations of caridean shrimps (they are from two distinct seasonal periods), the pooled data was divided into males, females,...
16 December 2019 5,842 2 View
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 1,263 1 View
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 3,672 25 View
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 4,752 4 View
I have problems with species tolerance scores or the sensitivity values (ES50) because I'm not plenty sure how to calculate it. I want to evaluate the benthic quality of three sites using caridean...
19 June 2017 7,452 4 View
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 1,112 2 View
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 9,279 3 View
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 3,432 7 View
It is for my thesis, cause I need to compare my concentration values of pesticides with those within the guideline, regarding to the Effects Range Low and Effects Range Medium. I've been search...
22 February 2016 5,129 5 View
I´m just doing lenght-weight relationships, but I need to know the sex of each individual. So I know there is an appendix masculina in males for example, but it would be very helpful if anyone can...
24 November 2015 4,545 4 View
