ArticlePloS one2015
Contrasting Population and Diet Influences on Gut Length of an Omnivorous Tropical Fish, the Trinidadian Guppy (Poecilia reticulata).
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.
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Who cites it
19 citing papers in PubMed.
- DNA methylation site loss for plasticity-led novel trait genetic fixation.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Alimentary Tract Anatomy and Morphology in Early Adult Mediterranean KillifishAnimals : an open access journal from MDPI · 2026Article
- Article
- Mechanism of fumonisin B1 on growth performance and intestinal structural integrity of juvenile grass carp (Animal nutrition (Zhongguo xu mu shou yi xue hui) · 2025Article
- Diet and predation risk affect tissue and excretion nutrients of Trinidadian guppies: a field survey.Scientific reports · 2024Article
- Consistent seasonal flexibility of the gut and its regions across wild populations of a winter-quiescent fish.Royal Society open science · 2024Article
- Shifts in gut microbiome across five decades of repeated guppy translocations in Trinidadian streams.Proceedings. Biological sciences · 2022Article
- Resource competition explains rare cannibalism in the wild in livebearing fishes.Ecology and evolution · 2022Article
- Gut microbiomes of cyprinid fish exhibit host-species symbiosis along gut trait and diet.Frontiers in microbiology · 2022Article
- Individual variation in feeding morphology, not diet, can facilitate the success of generalist species in urban ecosystems.Ecology and evolution · 2021Article
- Article
- Individual differences determine the strength of ecological interactions.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Microbiota Landscape of Gut System of Guppy Fish (International journal of microbiology · 2019Article
- The effects of protein and fiber content on gut structure and function in zebrafish (Danio rerio).Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2018Article
- Population variation in the trophic niche of the Trinidadian guppy from different predation regimes.Scientific reports · 2017Article
- Morphological and functional maturity of the oral jaws covary with offspring size in Trinidadian guppies.Scientific reports · 2017Article
- Implications of guppy (Ecology and evolution · 2017Article
- The influence of dietary and whole-body nutrient content on the excretion of a vertebrate consumer.PloS one · 2017Article
- Shared and unique patterns of phenotypic diversification along a stream gradient in two congeneric species.Scientific reports · 2016Article
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Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Phenotypic plasticity is advantageous for organisms that live in variable environments. The digestive system is particularly plastic, responding to changes in diet. Gut length is the result of a trade-off between maximum nutrient absorption and minimum cost for its maintenance and it can be influenced by diet and by evolutionary history. We assessed variation in gut length of Trinidadian guppies (Poecilia reticulata) as a function of diet, season, ontogeny, and local adaptation. Populations of guppies adapted to different predation levels have evolved different life history traits and have different diets. We sampled guppies from sites with low (LP) and high predation (HP) pressure in the Aripo and Guanapo Rivers in Trinidad. We collected fish during both the dry and wet season and assessed their diet and gut length. During the dry season, guppies from HP sites fed mostly on invertebrates, while guppies in the LP sites fed mainly on detritus. During the wet season, the diet of LP and HP populations became very similar. We did not find strong evidence of an ontogenetic diet shift. Gut length was negatively correlated with the proportion of invertebrates in diet across fish from all sites, supporting the hypothesis that guppy digestive systems adapt in length to changes in diet. Population of origin also had an effect on gut length, as HP and LP fish maintained different gut lengths even in the wet season, when their diets were very similar and individuals in both types of populations fed mostly on detritus. Thus, both environment and population of origin influenced guppies gut length, but population of origin seemed to have a stronger effect. Our study also showed that, even in omnivorous fish, gut length adapted to different diets, being more evident when the magnitude of difference between animal and plant material in the diet was very large.
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