Phosphorus body content in an herbivorous fish in environments with different trophic state

Santos, Talita M. de Andrade; Terra, Bianca de Freitas; Zandonà, Eugênia; Santaella, Sandra Tédde; Rezende, Carla Ferreira

doi:10.4081/jlimnol.2016.1202

Cited by 5 publications

(7 citation statements)

References 25 publications

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“…The first axis explained 57.24% of the total variance and the second axis 15.21%. Intestine length, the relative area of the dorsal fin, the relative mouth height, the index of ventral flattening, and the relative mouth width were the principal attributes responsible for the separation Hahn et al 1997) playing an important role for nutrient cycling in aquatic ecosystems (Capps & Flecker 2013, Santos et al 2016. Large dorsal fins and maneuverability to sustain in the rapids is one of their main ecomorphological features and was also registered in the studies developed by Pagotto et al (2011).…”

Section: Morphology and Feeding Ecology Between Studied Speciesmentioning

confidence: 90%

Feeding strategy and morphology as indicators of habitat use and coexistence of two loricariid fishes from a Brazilian coastal stream

et al. 2020

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We aimed to evaluate the relationship between form and function of two Loricariidae species (Hypostomus punctatus and Parotocinclus maculicauda) from a Neotropical coastal stream. We performed morphological-dietary analysis and discussed their coexistence strategies, as well. We hypothesized that both species use similar food resources according to their morphology but differences in habitat use facilitate their coexistence. In order to test this hypothesis, morphology, diet and habitat use were analyzed for both species. Trophic variance and the Pianka Niche Overlap index were calculated to explore the differences in trophic niche. Correlations between species abundance and water flow were applied to test habitat use. Principal Component Analysis and one Permutational Multivariate Analysis of Variance were applied to test differences between morphology and diet of both species. Morphological-dietary relationships were tested with Mantel test correlations. Total abundance of H. punctatus was higher in the stream channel with higher water flow. The dominant food items were sediment and organic matter for both species, and high trophic niche overlap was revealed. Additionally, morphology did not explain feeding habits for both species. Morphological characteristics were significantly different, especially for intestine length, relative area of the dorsal fin, ventral flattening and mouth attributes. The study site was rich in sand sediment, mud, and clay that are not considered good substrates to the establishment and growing of periphyton, which is an important trophic resource to Loricariidae species. Here, low consumption of periphyton can provide a possible explanation for the feeding similarity and the weak morphological-dietary relationships for both species. Thus, the environmental conditions can be more important for diet composition when compared to the similar and specialized morphology of loricariids.

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Section: Morphology and Feeding Ecology Between Studied Speciesmentioning

confidence: 90%

Feeding strategy and morphology as indicators of habitat use and coexistence of two loricariid fishes from a Brazilian coastal stream

et al. 2020

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“…Dickman, Newell, González, & Vanni, ; Ebel, Leroux, Robertson, & Dempson, ; El‐Sabaawi, Kohler et al., 2012; El‐Sabaawi, Travis et al., 2012). Recent studies have revealed that environmental heterogeneity can lead to considerable OS differences among different populations of a single species (Boros et al., ; de Andrade Santos, de Freitas Terra, Zandoná, Santaella, & Rezende, ; Leal, Best, Durston, El‐Sabaawi, & Matthews, ).…”

Section: Introductionmentioning

confidence: 99%

Organismal stoichiometry at the temporal scale: Seasonal variability shapes interspecific differences in fish

et al. 2018

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Changes in organismal stoichiometry (OS) may be driven by seasonal changes in lipid reserves (i.e. energy) and gonadal development in fish. However, these relationships are understudied. Hence, we investigated how seasonal changes in body lipid content and gonadal development can drive the seasonal variability of OS traits at the example of three coexisting freshwater fish species. Furthermore, we aimed to assess the importance of seasonal OS alteration in comparison with interspecific differences. Carbon (%C), nitrogen (%N) and phosphorus (%P) contents, and the molar ratios of these elements (C:N, C:P and N:P) were examined in rudd (Scardinius erythrophthalmus), pumpkinseed (Lepomis gibbosus) and Amur sleeper (Perccottus glenii). We consider the sex and seasonal changes in body size as a potential factor in shaping OS. Substantial seasonal intraspecific variability occurred in all OS traits. Its extent exceeded interspecific differences in %C, %N and C:N, while %P and C:P, N:P were determined primarily by species identity. The effect of sex occurred sporadically and was considerable in some cases. Seasonal changes in total length did not contribute to intraspecific variability of OS. Intra‐annual changes in body lipid content affected seasonal variability of OS traits substantially, but the strength of this effect was species‐specific. The regulatory role of lipid reserve alterations worked only for those species that exhibited considerable seasonal variation in body fat content. Gonado‐somatic index proved to be marginal in shaping seasonal changes in OS, presumably because a substantial portion of the essential elemental demand for gonadal growth is supplied by rearrangements within the body, without notable changes in the entire elemental composition. In the light of our findings, we suggest that more attention should be given to the influence of seasonal variability in OS traits, and sex should be considered as a taxon‐dependent effect. Ignoring this substantial degree of variability might lead to inaccuracies in assessing the extent of both intra‐ and interspecific OS differences. We conclude that seasonal OS variability might shape consumer‐driven nutrient dynamics.

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“…Peixes da família Loricariidae são conhecidos por atuarem diretamente na ciclagem de nutrientes em riachos costeiros, a partir do balanço entre demanda e excreção de fósforo (Hood et al 2005, Capps & Flecker 2013. No entanto, a demanda por fósforo varia entre grupos de indivíduos com diferentes valores de tamanho corporal (Santos et al 2016), ocasionando diferenças no papel funcional entre os indivíduos da mesma espécie. Outro exemplo é a diferença individual do papel funcional da traíra Hoplias malabaricus no controle populacional de presas, pois indivíduos jovens controlam populações de invertebrados enquanto indivíduos adultos controlam outras populações de peixes, já que essa espécie se torna piscívora ao longo da vida (Mello et al 2006).…”

Section: Indivíduos E Seus Papéis Funcionaisunclassified

Variação Intraespecífica Em Peixes De Riacho Com Ênfase Na Ecologia Trófica

Manna

Rezende

2021

Oecol. Aust.

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Assessing intraspecific variability in community structure and functioning are still scarce for stream-dwelling fish. However, measuring ecological traits for individuals is important since species’ response for environmental conditions occurs at the individual level, especially in streams which suffers constantly physical disturbances. Intraspecific variability can be measured for several ecological traits, such as morphology, diet, life-history, and habitat use that varies between populations or within populations. Here, we present some methods and studies that evaluated intraspecific trophic variability in stream-dwelling fish. Results revealing the role of individual variation in structure of biological populations and/or assemblages were selected, and principal issues were discussed. There are a lot of statistical tools that can test individual variation including functional indexes and multivariate analyzes. Results generated from such individual analyzes have high potential to explain the functioning of stream fish populations and communities.

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Phosphorus body content in an herbivorous fish in environments with different trophic state

Abstract: Animals are thought to be homeostatic, as they maintain relatively constant body nutrient content independently of changes in diet. Phosphorus (P)

Cited by 5 publications

References 25 publications

Feeding strategy and morphology as indicators of habitat use and coexistence of two loricariid fishes from a Brazilian coastal stream

Feeding strategy and morphology as indicators of habitat use and coexistence of two loricariid fishes from a Brazilian coastal stream

Organismal stoichiometry at the temporal scale: Seasonal variability shapes interspecific differences in fish

Variação Intraespecífica Em Peixes De Riacho Com Ênfase Na Ecologia Trófica

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