Impact of oceanic upwelling on morphometric and molecular indices of an intertidal fish<i>Scartichthys viridis</i>(Blenniidae)

Pulgar, José; Álvarez, Marco; Morales, Juan Pablo Castillo; García-Huidobro, M. Roberto; Aldana, Marcela; Ojeda, F. Patricio; Pulgar, Víctor M.

doi:10.1080/10236244.2010.533512

Cited by 30 publications

(17 citation statements)

References 48 publications

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“…Moreover, our two study zones, Quintay and Las Salinas, have been independently characterized by other research groups (Wieters, 2005) using the same classification criteria (U versus NU), also validating our classification. Our results are also consistent with what we have previously reported for other taxonomic groups in the same sites (see Pulgar et al, 2011) and thus we conclude that our observations would be not site-specific but are the expression of specific upwelling-dependent effects on the conditions of the respective organisms.…”

Section: Discussionsupporting

confidence: 95%

“…To characterize U zones, a direct relationship has been detected between seawater temperature and nutrient availability, with lower seawater temperature being associated with higher nutrient availability (Wieters, 2005). Our current data regarding the annual seawater temperature for the localities observed is in agreement with previous results of our group which indicate that Quintay, our U zone, displays a lower temperature than Las Salinas (Pulgar et al, 2011). Upwelling is directly related to nutrient availability and evidence indicates that both prey and their consumers will be increasingly well off nutritionally in these conditions (Broitman et al, 2001;Palumbi, 2003;Nielsen & Navarrete, 2004;Wieters, 2005;Pulgar et al, 2011).…”

Section: Discussionsupporting

confidence: 95%

“…Our current data regarding the annual seawater temperature for the localities observed is in agreement with previous results of our group which indicate that Quintay, our U zone, displays a lower temperature than Las Salinas (Pulgar et al, 2011). Upwelling is directly related to nutrient availability and evidence indicates that both prey and their consumers will be increasingly well off nutritionally in these conditions (Broitman et al, 2001;Palumbi, 2003;Nielsen & Navarrete, 2004;Wieters, 2005;Pulgar et al, 2011). For primary producers, it has been suggested that corticated algae are most abundant at sites of high upwelling intensity, whereas ephemeral algae predominate sites of low upwelling intensity (Nielsen & Navarrete, 2004).…”

Section: Discussionsupporting

confidence: 94%

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Upwelling affects food availability, impacting the morphological and molecular conditions of the herviborous limpet Fissurella crassa (Mollusca: Archeogastropoda)

et al. 2012

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Oceanographical processes, such as upwelling, induce variations in nutrient availability in marine ecosystems, and evidence indicates that nutrient input can strongly influence the physiological activities, structure, and dynamics of marine communities. Intertidal organisms have long been considered ideal study units in which to quantify the relationship of physical variations and differential energy allocations in specimens that undergo environmental variations, such as observed with nutrient availability. In habitats with differential nutrient input (upwelling versus non-upwelling), both food availability (algae abundance) and seasonal gonadal and foot weight variations were determined in the keyhole limpet Fissurella crassa. Gonadal weight is used as a measure of reproduction allocation whereas foot weight is an indirect indicator of energy allocation towards survival. RNA:DNA ratio in limpets was used as an indicator of biosynthetic capability. Our results indicate that, in general, algae abundance, muscular foot weight, and gonadal weight were higher in upwelling sites during all seasons studied. The same result was found for RNA:DNA ratios. Energetic allocation in animals that inhabit intertidal upwelling habitats supported a constant allocation towards reproduction and soft tissues. In contrast, animals that inhabit nonupwelling habitats showed important energetic restrictions associated with higher water temperature and lower food availability. Our results clearly show that in the keyhole limpet F. crassa food availability is a more important determinant of an individual's condition than a physical variation such as environment temperature.

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Section: Discussionsupporting

confidence: 95%

Section: Discussionsupporting

confidence: 95%

Section: Discussionsupporting

confidence: 94%

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Upwelling affects food availability, impacting the morphological and molecular conditions of the herviborous limpet Fissurella crassa (Mollusca: Archeogastropoda)

et al. 2012

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“…Studies on the physical features of species of the genus Scartichthys have revealed the association of morphological and physiological parameters (e.g., RNA:DNA ratios in muscle tissues) to environmental conditions (Pulgar et al 2011). Intraspecific variations of colouration patterns, however, have not been given especial attention until now.…”

Section: Adultmentioning

confidence: 99%

Colouration patterns of two species of the genus Scartichthys (Blenniidae: Perciformes) in the coastal area of northern Chile

Méndez-Abarca

Mundaca

2016

Rev. biol. mar. oceanogr.

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Abstract.-The aim of this study was to report the colouration patterns of live specimens of two Blenniidae species: Scartichthys gigas and S. viridis, from tide pools in the coastal area of 3 localities of northern Chile. Colouration patterns for S. gigas were: the two-bar front head covered/uncovered and the uniform orange-brown, found in specimens associated to kelps, for juveniles; an intermediate juvenile-adult reticulated bar-stained pattern described for the first time and the reticulated pattern for adults. For S. viridis the dark-light green pattern is described for juveniles and adults. The findings are discussed in terms of colouration patterns previously described for both species, with emphasis on the importance of using colouration patterns to improve species identification, reduce habitat disturbance and specimen removal from the wild.

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“…Guilds, in particular, were defi ned by Root (1967) as "a group of species that exploit the same class of environmental resources in a similar way", or in other words, species that strongly overlap in resource use. Moreover, whenever an ecosystem function is closely related to resource consumption, assessing the guild str ucture of a given assemblage allows identifying groups of species playing similar roles regarding such function (i.e., functional groups; Petchey & Gaston 2002, Blondel 2003, Petchey & Gaston 2006, Farías & Jaksic 2009, 2011. For example, through food consumption, consumer species mediate the processes of energy and nutrient transfer through the food web and, thus, they can be assigned to functional groups according their similarity in dietar y habits (i.e.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile

Berríos

Farías

Ojeda

2011

Rev. chil. hist. nat.

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Species resource use can var y throughout ontogeny, potentially affecting community dynamics. This can be particularly important for species facing high variability in environmental conditions and going through several orders of magnitude in size, as intertidal fi shes. However, the infl uence of the resulting ontogenetic changes in guild membership on the spatio-temporal structure of fi sh assemblages remains virtually unknown. Here we assessed the spatial and temporal variability in the ontogenetic feeding guild (OFG) structure of the fi sh assemblage inhabiting the temperate rocky intertidal zone along central Chilean coast. This was done applying principal component analysis (PCA) and randomization tests (R-test) on the relative OFG composition of fi sh assemblages, obtained from seasonal samples from ten pools located at two heights in the intertidal zone in three localities between 33º and 34º S. Overall, the PCA and R-tests suggest that spatial variability dominated over temporal variability in OFG structure, mainly due to a higher representation of omnivore species at high intertidal pools in two of the three sampled localities. However, phenology-related changes in the representation of fi sh size-classes (i.e. carnivore recruitment in spring-summer) along with ontogenetic differences in habitat selection (e.g., selection for low intertidal pools by bigger-sized carnivore OFG) contributed to both spatial and temporal differentiation in OFG structure. Finally, the relative representation of each OFG correlated with that of their dominant species, without evidence for density compensation. This suggests low levels of functional redundancy among species in each OFG, highlighting the vulnerability of assemblage functioning to size-biased disturbances as fi shing.Key words: intertidal fi shes, ontogenetic feeding guilds, spatio-temporal variability. RESUMENEl uso de los recursos puede variar a través de la ontogenia, afectando potencialmente las dinámicas comunitarias. Esto puede ser de particular importancia en especies que enfrentan alta variabilidad en las condiciones ambientales, especialmente en peces intermareales, los que alcanzan varios órdenes de magnitud en tamaño corporal. Sin embargo, la infl uencia de los cambios ontogenéticos en la membresía gremial sobre la estructura espacio-temporal de los ensambles de peces permanece virtualmente desconocida. En este trabajo estudiamos la variabilidad espacio-temporal en la estructura de los gremios alimenticios ontogenéticos (OFG) de los ensambles de peces intermareales que ocurren en el intermareal rocoso de la costa de Chile central. Para esto realizamos análisis de componentes principales (PCA) y pruebas de aleatorización (pruebas R) de la composición relativa de las OFG de estos ensambles, obtenidos de muestreos estacionales en diez pozas intermareales ubicadas en dos alturas de mareas en la zona intermareal en tres localidades entre los 33º y 34º S. En general, los PCA y pruebas R sugieren que la variabilidad espacial domina sobre la variabili...

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Impact of oceanic upwelling on morphometric and molecular indices of an intertidal fishScartichthys viridis(Blenniidae)

Cited by 30 publications

References 48 publications

Upwelling affects food availability, impacting the morphological and molecular conditions of the herviborous limpet Fissurella crassa (Mollusca: Archeogastropoda)

Upwelling affects food availability, impacting the morphological and molecular conditions of the herviborous limpet Fissurella crassa (Mollusca: Archeogastropoda)

Colouration patterns of two species of the genus Scartichthys (Blenniidae: Perciformes) in the coastal area of northern Chile

Spatio-temporal variability in ontogenetic guild structure of an intertidal fish assemblage in central Chile

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