Resting Metabolic Rate, Critical Swimming Speed, and Routine Activity of the Euryhaline Cyprinodontid,<i>Aphanius dispar</i>, Acclimated to a Wide Range of Salinities

Plaut, Itai

doi:10.1086/317746

Cited by 75 publications

(69 citation statements)

References 45 publications

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“…Decreases in salinity mean an improvement in environmental conditions for Gambusia spp., not only because of physiological stress and osmoregulation (Plaut 2000, Oliva-Paterna et al 2007) but also because of associated changes in habitat, mainly higher food availability (Velasco et al 2006, Gutiér-rez-Cánovas et al 2009 Table 3. Correlation matrix of growth rate [G(L T ), where L T is total length], somatic condition (ANCOVA-adjusted eviscerated mass) and hepatic condition (ANCOVA-adjusted hepatic mass) of Gambusia holbrooki with environmental variables in 2 populations (Spearman's rank correlation coefficients).…”

Section: Discussionmentioning

confidence: 99%

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Ruiz‐Navarro¹,

Moreno-Valcárcel²,

Torralva³

et al. 2011

Aquat. Biol.

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Knowledge of the adaptive ability of the highly invasive fish Gambusia holbrooki to new habitats is essential for determining its invasion potential. Our main objective was to assess the life-history of G. holbrooki in saline streams by studying its abundance, size and age structure, growth and condition. Two populations inhabiting similar streams of different salinity in the southeastern Iberian Peninsula were monitored over a 2 yr period. In both populations, the lifehistory of the species was characterized by a short life span, a long recruitment period with a massive emergence of young-of-the-year and fast growth of individuals during the first months of their lives. The species showed a less intense recruitment (6.9% of juveniles vs. 46.4% during the recruitment period) and an earlier end of the recruitment period (at least 2 mo) in the hypersaline system, although abundance, hepatic condition and female somatic condition were higher. In addition, temporary increases in salinity diminished population abundance, recruitment, and somatic and hepatic condition. Both populations showed similar seasonal abundance variation patterns, population structures, growth rates, and somatic and hepatic condition cycles. Other environmental factors independent of salinity could have influenced the differentiation in lifehistory of the species between populations, thus disguising direct relationships between salinity and life-history. However, the studied parameters show that G. holbrooki presents a great ability to adapt to lotic systems with high and different levels of salinity. KEY WORDS: Gambusia holbrooki · Invasive success · Salinity · Population dynamics · Growth · ConditionResale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 99%

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Ruiz‐Navarro¹,

Moreno-Valcárcel²,

Torralva³

et al. 2011

Aquat. Biol.

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“…Estos incrementos de salinidad provocaron mortandades masivas afectando a distintos parámetros de su estrategia de vida en el sistema (Ruiz-Navarro et al 2007, Oliva-Paterna et al 2009). Efectos de cambios drásticos en la salinidad sobre la biología de ciprinodóntidos han sido puestos de manifiesto en diversos estudios (Nordlie et al 1991, Plaut 2000, Yildirim & Karacuha 2008, entre otros). En suma, el hecho de que durante el segundo ciclo de estudio la densidad de A. iberus no haya sido tan elevada como en el primero puede deberse a la elevada salinidad y conductividad alcanzada en el medio.…”

Section: Discussionunclassified

Dinámica poblacional y relaciones con el hábitat de Aphanius iberus (Valenciennes 1846) en un humedal con salinas en explotación

Moreno-Valcárcel¹,

Torralva²,

Verdiell‐Cubedo³

et al. 2012

analesbio

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Dinámica poblacional y relaciones con el hábitat deAphanius iberus es un ciprinodóntido endémico de la Península Ibérica muy amenazado, a pesar de los esfuerzos de gestión realizados. Se presenta la variación temporal de su abundancia y su relación con el hábitat, en un humedal con salinas en explotación. La densidad muestra una estacionalidad con máximos durante el verano y otoño. Cambios en los niveles de agua de la balsa provocan incrementos en la salinidad que pueden haber ejercido efectos negativos sobre su abundancia relacionados con la reducción de la vegetación acuática. Se observaron cambios en el uso del microhábitat que pueden relacionarse con el ciclo temporal de abundancia y del mesohábitat. La abundancia mostró una relación con la vegetación acuática y la cercanía a motas salineras, áreas probablemente usadas como refugio. Los resultados apoyan la necesidad de criterios biológicos en la gestión de humedales para mantener la especie. Los efectos observados deben considerarse en acciones de conservación sobre sus poblaciones.Palabras clave: Cyprinodontidae, Dinámica poblacional, Microhábitat, Especies amenazadas. Abstract Population dynamic and habitat relationships of Aphanius iberus (Valenciennes 1846) in a wetland managed for salt exploitationAphanius iberus is an endemic cyprinodontid of the Iberian Peninsula highly endangered despite management efforts. We present its population dynamic and relationships with the habitat in a wetland managed for salt exploitation. Density showed a seasonal pattern characterized by maxima values during summer and autumn. Changes in water level that drastically increased the salinity should have produced effects on fish abundance by reducing vegetation mats. The species showed changes in microhabitat use which could be linked with its seasonal abundance and the environmental conditions, at mesohabitat scale. Its abundance showed relationships with vegetation mats and the proximity to embankments, areas probably used as a refuge. Results support the need of the biological criteria in the management of wetland in order to maintain populations of this species. The observed effects should be considered when such populations are exposed to recovery actions.

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“…High salinity levels may have negative effects on the metabolism of cyprinodontids (Plaut 2000;Oliva-Paterna et al 2006b), on growth performance and survival (Yildirim & Karacuha 2008), and on other fish species, especially on particular fractions of the populations as larval stages or juveniles (Bohlen 1999;Boyce 1999). In general, it is important to detect the optimum salinity level for each fish species thriving in different environments.…”

Section: Discussionmentioning

confidence: 99%

Biology of the endangered cyprinodontidAphanius iberusin a saline wetland (SE Iberian Peninsula)

Oliva‐Paterna

Ruiz‐Navarro

Torralva

et al. 2009

Italian Journal of Zoology

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For the last few decades, Aphanius iberus, an endemic cyprinodontid from the Iberian Peninsula and included in international red lists, has been declining despite several management efforts. In this study we present the biology of the species in an isolated wetland managed for salt exploitation (its most common habitat type in the southeastern Iberian Peninsula). The population studied is found under conditions of extreme high salinity and water temperature. We have examined the effects of extractive management on catchability, population structure, growth and reproduction traits. The stock was characterized by significant differences in abundance between seasons (higher values: end of summer and early autumn). Drastic changes in salinity and water level have negatively affected the species abundance. The population structure was characterized by three age groups (0+, 1+ and 2+ in both sexes), a high degree of group-size overlapping into the 0+ (.2 groups), a short life span and a long reproductive period (April/May to September). Gonadal mass represented a maximum of 19.6¡0.5% of the total mass in females. We detected changes in life-history traits which could be related to the management of the salt extraction, variations in water level that increase the salinity should be indirect effects on fish population by reducing vegetation mats.

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Resting Metabolic Rate, Critical Swimming Speed, and Routine Activity of the Euryhaline Cyprinodontid,Aphanius dispar, Acclimated to a Wide Range of Salinities

Cited by 75 publications

References 45 publications

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Dinámica poblacional y relaciones con el hábitat de Aphanius iberus (Valenciennes 1846) en un humedal con salinas en explotación

Biology of the endangered cyprinodontidAphanius iberusin a saline wetland (SE Iberian Peninsula)

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Resting Metabolic Rate, Critical Swimming Speed, and Routine Activity of the Euryhaline Cyprinodontid,Aphanius dispar, Acclimated to a Wide Range of Salinities

Cited by 75 publications

References 45 publications

Life-history traits of the invasive fish Gambusia ­holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Life-history traits of the invasive fish Gambusia ­holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Dinámica poblacional y relaciones con el hábitat de Aphanius iberus (Valenciennes 1846) en un humedal con salinas en explotación

Biology of the endangered cyprinodontidAphanius iberusin a saline wetland (SE Iberian Peninsula)

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Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?

Life-history traits of the invasive fish Gambusia holbrooki in saline streams (SE Iberian Peninsula): Does salinity limit its invasive success?