Well-supported correlations between swim speed and mouth size during prey capture suggest the broad existence of an integrated relationship between locomotion and feeding in suction-feeding fishes. However, the influence of specialization on this relationship is unclear. We used divergent populations of Trinidadian guppies () to test whether integration during suction is generalizable to a non-suction specialist and whether intraspecific specialization of component systems affects their integration. Guppies from replicate high- and low-predation streams were recorded capturing wild-type zooplankton using suction. Alternative general linear models supported a positive correlation between swim speed and mouth size in derived low-predation populations, suggesting that the relationship can be extended in some cases. High-predation populations lack this integration, which may be the result of direct selection or constraints imposed by selection on locomotion. As guppies invade new habitats they may be evolving a new, integrated performance phenotype from a non-integrated ancestor.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1242/jeb.190165 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Positive Chemotactic Flasklike Colloidal Motors Propelled by Rotary FF-ATP Synthases.
Research (Wash D C)
December 2024
School of Medicine and Health, Harbin Institute of Technology, Harbin 150001, China.
Living microorganisms can perform directed migration for foraging in response to a chemoattractant gradient. We report a biomimetic strategy that rotary FF-ATPase (adenosine triphosphatase)-propelled flasklike colloidal motors exhibit positive chemotaxis resembling the chemotactic behavior of bacteria. The streamlined flasklike colloidal particles are fabricated through polymerization, expansion, surface rupture, and re-polymerizing nanoemulsions composed of triblock copolymers and ribose.
View Article and Find Full Text PDFEffects of pre-experimental fasting and sheltering on the swimming performance and oxygen consumption of juvenile grass carp (Ctenopharyngodon idella).
J Fish Biol
December 2024
College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang, China.
This study investigated the effects of pre-experimental fasting for 2, 7, and 14 days under both unsheltered (12 h dark-12 h light) and sheltered conditions on the critical swimming speed (U) and oxygen consumption (MO) of juvenile grass carp, using a modified swim respirometer. Key findings include (1) the U of test fish decreased significantly, by 28%, after fasting for 14 days and sheltering intensified the impact to a 43% decrease, and (2) fish anaerobic capacity decreased after 7 days but increased after 14 days, and was enhanced by sheltering conditions. These findings are important as they indicate that fasting and sheltering can impair grass carp survival and disrupt river ecosystem balance, highlighting the need for habitat conservation.
View Article and Find Full Text PDFHigh resolution kinematic approach for quantifying impaired mobility of dystrophic zebrafish larvae.
bioRxiv
December 2024
Division of Genetics and Genomics, Dept. of Pediatrics, Boston Children's Hospital, Boston, MA.
Dystrophin-deficient zebrafish larvae are a small, genetically tractable vertebrate model of Duchenne muscular dystrophy well suited for early stage therapeutic development. However, current approaches for evaluating their impaired mobility, a physiologically relevant therapeutic target, are characterized by low resolution and high variability. To address this, we used high speed videography and deep learning-based markerless motion capture to develop linked-segment models of larval escape response (ER) swimming.
View Article and Find Full Text PDFManual Dexterity in Open-Water Wetsuited Swimmers: A Cohort Crossover Study.
Int J Sports Physiol Perform
December 2024
Department of Anesthesiology and Intensive Care, Akershus University Hospital, Lørenskog, Norway.
Purpose: Laboratory studies have demonstrated that manual dexterity decreases with increasing cold, which may adversely affect performance. Dexterity may be impaired by cooling of the hand, cooling of the lower motor neurons, and cognitive impairment. Wetsuits are commonly used in open-water swimming and are mandated in some situations.
View Article and Find Full Text PDFOptimal Cell Length for Exploration and Exploitation in Chemotactic Planktonic Bacteria.
Environ Microbiol
December 2024
School of Life Sciences, Joseph Banks Laboratories, University of Lincoln, Lincoln, UK.
Elongated morphologies are prevalent among motile bacterioplankton in aquatic systems. This is often attributed to enhanced chemotactic ability, but how long is best? We hypothesized the existence of an optimal cell length for efficient chemotaxis resulting from shape-imposed physical constraints acting on the trade-off between rapid exploration versus efficient exploitation of nutrient sources. To test this hypothesis, we evaluated the chemotactic performance of elongated cephalexin-treated Escherichia coli towards α-methyl-aspartate in a microfluidic device creating linear, stable and quiescent chemical gradients.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!