Seasonal changes in reproductive endpoints in<i>Trichomycterus areolatus</i>(Siluriformes: Trichomycteridae) and<i>Percilia gillissi</i>(Perciformes, Perciliidae), and the consequences for environmental monitoring

Chiang, Gustavo; Munkittrick, Kelly R.; Saavedra, Maria Fernanda; Tucca, Felipe; McMaster, Mark E.; Urrutia, Roberto; Tetreault, Gerald R.; Barra, Ricardo

doi:10.1080/01650521.2011.598296

Cited by 13 publications

(23 citation statements)

References 23 publications

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“…The highest observed abundance of oocytes in advanced stages of maturity, were consistent with data of highest gonadosomatic indices (GSI) during spring and early summer, previously reported for both species (Chiang et al 2011a) and to the presence of mature female (external examination) between September and December (T. areolatus) (Montoya et al 2012). The histological analysis of the oocytes in T. areolatus is protracted from what has been reported by Manríquez et al (1988) using macroscopic observations, which describes this species with a synchronous development of batches of oocytes in the gonad between spring and early summer.…”

Section: Discussionsupporting

confidence: 73%

“…Incorporating histological data will help to understand gonadal development and when spawning events occur, and integrating this reproductive data with growth information will help us to understand population dynamics to make better decisions about fi sheries management and conservation (LowerreBarbieri et al 2011). This knowledge may also help to plan environmental management by separating natural variability from anthropogenic impacts (Chiang et al 2011a(Chiang et al , 2011b.…”

Section: Discussionmentioning

confidence: 99%

“…The size limit distinction between juvenile and adult fi shes was determined using the initiation of reproductive development as the presence of mature oocytes (Nikolsky 1963, fi de Manriquez et al 1988Jackobsen et al 2009) and for T. areolatus only fi shes ≥50mm were found with maturing gonads (Manriquez et al, 1988;Chiang et al, 2011a), while mature oocytes in P. gillissi started at size ≥ 43mm, as described in previous studies by external gonadal examination (Chiang et al 2011a) and confi rmed in this study by histological analysis. During our collections, no T. areolatus <29 mm total length or <26 mm total length for P. gillissi were captured.…”

Section: Discussionmentioning

confidence: 99%

“…There is a lack of consistent data on the reproductive biology of the Percilia genus, but for the congeneric species (P. irwini) spawning is estimated to occur in late winter and early spring, between August and November (Habit & Belk 2007). Recently, we have assessed seasonal changes in metabolic and reproductive parameters such as gonadosomatic indices (GSI) for both species and described the macroscopic development of the gonad, along with identifying the size at fi rst maturity (Chiang et al 2011a). Despite one study describing the different stages of oocyte maturation for T. areolatus (Huaquin et al 2002), there is nothing published for P. gillissi.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal changes in oocyte development, growth and population size distribution of Percilia gillissiand Trichomycterus areolatus in the Itata basin, Chile

Chiang¹,

Munkittrick²,

McMaster³

et al. 2012

Gayana (Concepc.)

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Seasonal changes in oocyte development, growth and population size distribution of Percilia gillissi and Trichomycterus areolatus in the Itata basin, ChileCambio estacionales en el desarrollo de oocitos, crecimiento y distribución de talla poblacional de Percilia gillissi y Trichomycterus areolatus en la cuenca del río Itata, Chile GUSTAVO ABSTRACTThere is scarce basic biological data on native freshwater fi sh species from Chile and next to zero on growth, gonad development and reproduction, which are critical for the purposes of the conservation of their natural populations. Seasonal analysis of sub-individual (oocyte development) and population (length frequency, growth rates) endpoints in Trichomycterus areolatus and Percilia gillissi were evaluated from February 2007 to January 2008. Oocyte development has a marked seasonality for P. gillissi, with mature eggs in October and declining frequency of mature oocytes into January. For T. areolatus we found some mature eggs in July, with highest number of mature eggs in October, coincident with previous data on maximum gonad size. Both species showed a multiple spawning reproductive strategy, with a long spawning season starting in spring to early summer. Increased numbers of juveniles were observed during mid-summer for P. gillissi,and during the end of the summer and beginning of autumn for T. areolatus. Juveniles had a higher growth coeffi cient (K) (0.56-0.38 mm month-1) than adults (0.29-0.15 mm month-1), and almost all juveniles in the population reached maturity before the spring (>50 mm for T areolatus and >40 mm for P. gillissi) and were incorporated into the population as a new recruitment cohort. Knowledge of the seasonal variability of these individual and population level responses can help better understand the biology of the species, and simultaneously improve the management and conservation of freshwater biota in Chile. KEYWORDS:Seasonal cycles, native fi sh Chile, oocyte development, multiple spawning reproductive strategy, population size-structure. RESUMENExisten escasos datos de biología básica sobre las especies de peces nativas chilenas de agua dulce y casi ninguno en sobre el crecimiento, el desarrollo gonadal y reproducción, que son fundamentales para los propósitos de la conservación de sus poblaciones naturales. El análisis estacional de los parámetros sub-individuales (desarrollo de oocitos) y poblacionales (frecuencia de tallas y tasa de crecimiento) en Trichomycterus areolatus y Percilia gillissi fueron evaluados entre febrero de 2007 y enero de 2008.El desarrollo de los oocitos posee una marcada estacionalidad en P. gillissi con oocitos maduros en octubre y una disminución de estos estados maduros hacia enero. En T. areolatus encontramos oocitos maduros en Julio, pero con una mayor abundancia durante octubre, coincidente con datos previos de máximo desarrollo de la gónada. Ambas especies mostraron una estrategia reproductiva de desoves multiples, con una temporada de desove que comienza en primavera hasta principios de verano. Amb...

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Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal changes in oocyte development, growth and population size distribution of Percilia gillissiand Trichomycterus areolatus in the Itata basin, Chile

Chiang¹,

Munkittrick²,

McMaster³

et al. 2012

Gayana (Concepc.)

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“…Information about variability, seasonal cycles and power analysis would help us to design a proper monitoring program, giving us information about what species is more or less appropriate as sentinel species and when/where is best to catch them (Fig. 3) (Munkittrick et al 2009;Chiang et al 2011b). …”

Section: Regional Cumulative Effects Assessment and Environmental Impmentioning

confidence: 99%

Regional Cumulative Effects Monitoring Framework: Gaps and Challenges for the Biobío River Basin in South Central Chile

et al. 2014

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Sustainable watershed management in the world is an issue that has taken much importance and attention in terms of quality and availability of water for all users in the basin. The economic growth experienced by Chile in recent years has led to increased stress on aquatic systems, especially in the Biobío river basin. The Biobío basin has faced with multiple expansions for hydroelectric power, and at the same time providing sources for competing demands from urbanization, industry, agriculture and irrigation, forestry, aquaculture, tourism, recreation, and it is a regional domain of indigenous peoples. There is a growing unease about the current process of managing single developments with Environmental Impacts Assessment (EIA). Assessing the impacts of all these threats to freshwater ecosystem is challenging. The Biobío offers an opportunity to make advances in a number of important areas for regional watershed management, including national standardization requirements for effects monitoring and for the development of a regional database. For Biobío river basin, development of such a conceptual framework requires several steps that include identifying: the scope (basin and/or subbasin) and setting (physiographic/geopolitics governance); threats to the system (past present and future); regional resource users and public services, and natural variation and gradients within the system. In these review we state what kind of pilot studies would be required to help design a Regional Cumulative Effects Monitoring Framework and must establish key design criteria including what species (species differential sensitivity) and parameters (level of organization), the magnitude of change we wish to detect and monitoring frequency are necessary to ensure sustainable management of the Biobío river basin. KEYWORDS:Regional Cumulative Effects Monitoring, Biobío River, biological monitoring, philosophical approach. RESUMENLa gestión sustentable de las cuencas hidrográfi cas en el mundo es problema que ha tomado una gran relevancia y atención, en términos de calidad y disponibilidad de agua para todos los usuarios de las cuencas. El crecimiento económico experimentado por Chile en los últimos años ha llevado a un aumento en el estrés a los sistemas acuáticos continentales, especialmente la cuenca del río Biobío. La cuenca del rio Biobío ha enfrentado un gran aumento en el desarrollo de hidroeléctrico, y al mismo tiempo ha tenido que proveer los recursos para demandas hídricos que compiten entre si, como son la urbanización, agricultura e riego, forestal, acuicultura, turismo, recreación, así como ser parte del territorio de los pueblos originarios. Existe una creciente inquietud sobre el proceso actual de gestión de proyectos individuales con procesos individuales de Evaluación de Impactos Ambientales (EIA). La evaluación de los impactos de todas estas amenazas a los ecosistemas dulceacuícolas es un reto no menor. El río Biobío ofrece una oportunidad para avanzar en una serie de áreas importantes para la gestión regional ...

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Optimization of effects‐assessment of greenside darter (Etheostoma blennioides) exposed to tertiary treated municipal wastewater based on seasonal changes of reproductive endpoints

Tetreault

Bennett

Servos

et al. 2014

Enviro Toxic and Chemistry

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The present study describes the seasonal changes in reproductive endpoints of the greenside darter (Etheostoma blennioides) and its implications for environmental monitoring. Fish collections conducted at the appropriate time for the site-specific sentinel fish species can provide a wide variety of population-level information including recruitment, reproduction, and energy storage. The objectives of the present study were to: 1) characterize seasonal changes in reproductive endpoints of the greenside darter (both sexes) to determine the appropriate period for monitoring of this sentinel species; and 2) evaluate the effect of exposure of this sentinel species to tertiary treated municipal effluent at the selected monitoring period. Based on the selected parameters (gonadosomatic index [GSI], liver somatic index [LSI], condition factor, and in vitro gonadal steroid production [testosterone (T) in both sexes; estradiol (E2) in females; and 11-ketotestosterone (11KT) in males]), the present study provides evidence for the value of collecting darters during recrudescence (late fall/early winter) to ensure temporal stability, minimum variability, and stable steroid production capacity. Darters exposed to tertiary treated municipal effluent tended to be larger and heavier relative to reference fish but did not demonstrate any consistent responses in terms of condition or relative liver size. No effect on gonadal development was observed, even though these tertiary-effluent-exposed fish demonstrated a significant reduction in the ability to produce hormones. The present study suggests that although fish exposed to tertiary treated effluent demonstrate no population-level effects, they are still responding at a physiological level. Documentation of the reproductive cycle of sentinel species allows for selection of the most appropriate sampling period to reduce variability and greatly enhances the reliability and interpretation of biological responses.

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Seasonal changes in reproductive endpoints inTrichomycterus areolatus(Siluriformes: Trichomycteridae) andPercilia gillissi(Perciformes, Perciliidae), and the consequences for environmental monitoring

Cited by 13 publications

References 23 publications

Seasonal changes in oocyte development, growth and population size distribution of Percilia gillissiand Trichomycterus areolatus in the Itata basin, Chile

Seasonal changes in oocyte development, growth and population size distribution of Percilia gillissiand Trichomycterus areolatus in the Itata basin, Chile

Regional Cumulative Effects Monitoring Framework: Gaps and Challenges for the Biobío River Basin in South Central Chile

Optimization of effects‐assessment of greenside darter (Etheostoma blennioides) exposed to tertiary treated municipal wastewater based on seasonal changes of reproductive endpoints

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