The Dissertations Sticky

For the discussion of catfish systematics. Post here to draw our attention to new publications or to discuss existing works.
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bekateen
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Evolutionary Ecology of Loricariid Catfishes

Post by bekateen »

MODERATOR'S NOTE: This paper was published on 2 November 2022: viewtopic.php?t=51252

Black, C. (2022). Evolutionary Ecology of Loricariid Catfishes. Ph.D. dissertation, Auburn University.

https://etd.auburn.edu/handle/10415/8312

PDF: https://etd.auburn.edu/bitstream/handle ... sAllowed=y
Abstract
How extrinsic (like functional constrains and ecological interactions) and intrinsic (like modularity and integration) interactions drive diversification is a formative area of evolutionary biology. In this dissertation, I explore the phenotypic diversification of the armored catfishes using geometric morphometrics, stable isotope analyses, and phylogenetic comparative methods. I found that the armored catfish body is highly modularized, with varying degrees of integration between each module, suggesting that interactions within and between modules influence morphological evolution. Additionally, slight changes in modularity and integration patterns in clades may have allowed for diversification along a specific trajectory. When focused on the oral jaw shape, I found that traditional and automated processes captured shape more effectively when all jaw components were combined. Although ecological traits do not play a role in jaw shape, there was a correlation between clades with diverse diets and fast evolutionary rates of shape. These results suggest that shape is not constrained to diet and that similarly shaped jaws coupled with different types of teeth could allow the fishes to feed on a wide range of materials. Finally, I built a vector-based analysis, baseline‐standardized isotopic vector analysis (BaSIVA) to visualize dietary variation while accounting for isotopic discrepancies between locations. Results from BaSIVA delineate trophic groups better than traditional trophic positioning methods while accounting for variation in basal resources, suggesting BaSIVA should be the standard for vector‐based stable isotope analysis in riverine environments with similar baseline resources.
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Jools
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Re: Diversity of Trichomycterus in the Rio Doce basin

Post by Jools »

bekateen wrote: Wed Oct 17, 2018 5:37 am Ten new species proposed:
  • Trichomycterus astromycterus sp. nov.
  • T. barrocus sp. nov.
  • T. brucutu sp. nov.
  • T. illuvies sp. nov.
  • T. melanopygius sp. nov.
  • T. ipatinguensis sp. nov.
  • T. pussilipygius sp. nov.
  • T. sordislutum sp. nov.
  • T. vinnulus sp. nov.
  • T. tantalus sp. nov.
This one now published. What do I do - create a new post?

Jools
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bekateen
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Re: Diversity of Trichomycterus in the Rio Doce basin

Post by bekateen »

Jools wrote: Sun Nov 20, 2022 12:15 pm [
This one now published. What do I do - create a new post?

Jools
That's what I've been doing, then I link the two posts together with a moderators note. Perfect example is my thesis post immediately above yours here. Take a look:
bekateen wrote: Mon Aug 01, 2022 2:44 pm MODERATOR'S NOTE: This paper was published on 2 November 2022: viewtopic.php?t=51252

Black, C. (2022). Evolutionary Ecology of Loricariid Catfishes. Ph.D. dissertation, Auburn University.

https://etd.auburn.edu/handle/10415/8312
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Jools
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Re: The Dissertations Sticky

Post by Jools »

OK, I will do, I didn't see that as I was at the original post a bit back up the thread. All should be done now,

Cheers,

Jools
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