AI Article Synopsis
- Sawfishes are large, endangered rays recognized for their unique tooth-studded rostrums, with the smalltooth sawfish experiencing the most drastic habitat decline, now confined to about 20% of its original range.
- Recent research collected transcriptomic data from various tissue types of sawfishes and compared this to other elasmobranch species to better understand their genetics.
- Positive selection was found in 79 genes linked to growth factors and body symmetry, indicating these genes may play a role in sawfish adaptation to environmental factors and their advanced electrosensory systems.
Article Abstract
Sawfishes (Pristidae) are large, highly threatened rays named for their tooth-studded rostrum, which is used for prey sensing and capture. Of all five species, the smalltooth sawfish, , has experienced the greatest decline in range, currently found in only ~20% of its historic range. To better understand the genetic underpinnings of these taxonomically and morphologically unique animals, we collected transcriptomic data from several tissue types, mapped them to the recently completed reference genome, and contrasted the patterns observed with comparable data from other elasmobranchs. Evidence of positive selection was detected in 79 genes in , several of which are involved in growth factor/receptor tyrosine kinase signaling and body symmetry and may be related to the unique morphology of sawfishes. Changes in these genes may impact cellular responses to environmental conditions such as temperature, dissolved oxygen, and salinity. Data acquired also allow for examination of the molecular components of electrosensory systems, which are highly developed in sawfishes and have likely been influential in their evolutionary success.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11057056 | PMC |
| http://dx.doi.org/10.1002/ece3.11260 | DOI Listing |
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Article Synopsis
- Sawfishes are large, endangered rays recognized for their unique tooth-studded rostrums, with the smalltooth sawfish experiencing the most drastic habitat decline, now confined to about 20% of its original range.
- Recent research collected transcriptomic data from various tissue types of sawfishes and compared this to other elasmobranch species to better understand their genetics.
- Positive selection was found in 79 genes linked to growth factors and body symmetry, indicating these genes may play a role in sawfish adaptation to environmental factors and their advanced electrosensory systems.
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