The ichthyofaunal composition of the Elbe Estuary: an analysis in space and time

Thiel, Ralf; Potter, I. C.

doi:10.1007/s002270000491

Cited by 103 publications

(70 citation statements)

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“…Each fish species was assigned to one of the following ecological guilds (adapted from Thiel and Potter, 2001): marine stragglers (MS; species that are typically found irregularly and in small numbers in estuaries and usually in areas of high salinity); marine estuarine opportunists (MO; species that are often abundant in estuaries particularly as juveniles); marine opportunistic residents (OR, species that are often abundant in estuaries but that can also reach and spend relative long periods in freshwater); estuarine species (ES; species which can complete the whole life cycle in estuaries); diadromous species, being either catadromous (CA; species which spawn at sea and feed mainly in freshwater) or anadromous (AN; species which spawn in fresh water and feed mainly in marine M. Mota et al: Ann. Limnol.…”

Section: Discussionmentioning

confidence: 99%

Seasonal changes in fish assemblages in the River Minho tidal freshwater wetlands, NW of the Iberian Peninsula

Мота

Sousa

Bio

et al. 2014

Ann. Limnol. - Int. J. Lim.

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-The ichthyofauna of the River Minho tidal freshwater wetlands (TFWs) was studied in a semienclosed area, between June 2007 and May 2010, to determine temporal patterns of abundance, biomass and species composition. Fish catches, standardized by the number of fyke nets and by the fishing effort, were analysed and related to river flow, water temperature and precipitation. In total, 21 fish species were identified including six non-indigenous species (NIS) which represented 15% of the total captures (yet 43% of the biomass). Regarding ecological guilds, 82% were freshwater species (61% of the biomass) which included all NIS, whereas 13% of the catches were catadromous species (31% biomass) corresponding to eels. Only 4% were estuarine species (1% biomass) and together marine estuarine opportunists and anadromous species accomplished 1% (2 and 6% biomass, respectively). The fish assemblage showed seasonal patterns with a clear distinction between autumn/winter and spring/summer periods. Significant differences in abundance and biomass were also detected between autumn/winter of 2007/2008 and 2008/2009, i.e., inter-annual variations, with the latter period with lower catches yet higher dominance of NIS. Besides, higher water temperature had a significant negative effect on the observed number of species, but a positive effect on the abundance and biomass of NIS. More attention has to be given to TFWs and their role in structuring fish assemblages, because this information is vital for a sound management, conservation and restoration of estuarine areas.

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Section: Discussionmentioning

confidence: 99%

Seasonal changes in fish assemblages in the River Minho tidal freshwater wetlands, NW of the Iberian Peninsula

Мота

Sousa

Bio

et al. 2014

Ann. Limnol. - Int. J. Lim.

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“…Fish assemblages in European estuaries are typically dominated by either migrant or straggler marine species, i.e. irregular visitors with no apparent estuarine requirements (Elliott and Dewailly 1995, Thiel and Potter 2001, Maes et al 2005, Pombo et al 2007, Franco et al 2008, Cabral et al 2012.…”

Section: Discussionmentioning

confidence: 99%

“…Seasonal shifts in fish communities are common, as a result of sequential immigration and emigration of certain fish species (Hyndes et al 1999, Thiel andPotter 2001). Tidal shifts in fish assemblages have also been reported by several authors (Sogard et al 1989, Rountree and Able 1993, Gray et al 1998, Griffiths 2001, Methven et al 2001, Morrison et al 2002, Guest et al 2003.…”

Section: Introductionmentioning

confidence: 91%

Seasonal dynamics of fish assemblages in an intertidal mudflat of Indian Sundarbans

Chaudhuri¹,

Mukherjee²,

Homechaudhuri³

2013

Sci. Mar.

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SUMMARY: In the present study, the seasonal and inter-annual fish assemblage structure of intertidal mudflats of Indian Sundarbans was analysed during tidal cycles. A total of 31 fish species belonging to 22 families and 9 orders were collected during high tide, whereas only 12 were recorded during low tide. Fish assemblage descriptions were based on several community descriptors, namely diversity (H′), species richness (S), species dominance (D), and species evenness (J) and on an ecological guild classification. A canonical correspondence analysis (CCA) was performed to evaluate the relationship between estuarine habitat and fish assemblages in the mudflat habitat during inundated and exposed conditions. All the diversity indices showed marked seasonal and inter-annual variations. Temporal variations were also found in fish assemblage structure in both tidal conditions. Estuarine species were the most important ecological guild of the mudflats during both high and low tides. Of all the abiotic variables examined, CCA showed that salinity, pH and nutrients were the most important influencing fish assemblage during high tide. Total dissolved solids, water temperature and salinity were significant during low tide. Considering the importance of mudflats in supporting fish diversity, the present study emphasizes the increased efforts for conservation of this habitat in the Indian Sundarbans.Keywords: ichthyofaunal diversity, seasonal variation, tidal variation, mudflats, Bray-Curtis similarity, CCA. RESUMEN: Dinámica estacional De comuniDaDes De peces en una marisma intermareal De sunDarbans inDio. -En el presente estudio, la estructura estacional e interanual de comunidades de peces en el intermareal fangoso de Sundarbans se analizó durante ciclos de marea. 31 especies pertenecientes a 22 familias y 9 órdenes fueron recogidas durante la marea alta, mientras que sólo 12 se registraron durante la marea baja. Las comunidades se describieron varios descriptores: diversidad (H′), riqueza de especies (S), dominancia de especies (D) y uniformidad de especies (J) y una clasificación ecológica de comunidad. Se realizó un análisis de correspondencia canónico (CCA) para evaluar la relación entre hábitat estuárico y comunidades de peces durante condiciones inundadas y expuestas. Todos los índices de diversidad mostraron marcadas diferencias estacionales e interanuales. También se encontraron variaciones temporales en la estructura del conjunto de peces en tanto las condiciones de la marea. Especies estuarinas (ES) fue el grupo ecológico más importante de las marismas de Sundarbans tanto durante la marea alta como en la baja.Palabras clave: diversidad íctica, variación estacional, variación de marea, marismas, similitud de Bray-Curtis, CCA. Scientia Marina 77(2)

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“…Water temperature, oxygen concentration and salinity for April to June 2009 and 2010 were compared with earlier findings from 1992 to 1993 (Thiel et al 1995, Thiel & Potter 2001. As water temperature does not differ significantly between the subareas of the Elbe estuary (Thiel & Potter 2001), it was analysed by month only.…”

Section: Data and Statistical Analysesmentioning

confidence: 99%

“…As water temperature does not differ significantly between the subareas of the Elbe estuary (Thiel & Potter 2001), it was analysed by month only. Oxygen concentrations measured were checked for critical periods (i.e.…”

Section: Data and Statistical Analysesmentioning

confidence: 99%

Stock recovery, spawning period and spawning area expansion of the twaite shad Alosa fallax in the Elbe estuary, southern North Sea

Magath¹,

Thiel²

2013

Endang. Species. Res.

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After a serious decline in the past, some twaite shad Alosa fallax populations have significantly recovered during the last decade. Although increasing numbers of the species occur in areas of the southern North Sea, detailed quantitative analyses have not been published on spawning stocks of specific North Sea estuaries. In this study, the development of the twaite shad spawning stock of the Elbe estuary, its spawning period and spawning area were determined using abundance data, gonad maturity information and the gonadosomatic index. Abundances were compared between the periods

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The ichthyofaunal composition of the Elbe Estuary: an analysis in space and time

Cited by 103 publications

References 0 publications

Seasonal changes in fish assemblages in the River Minho tidal freshwater wetlands, NW of the Iberian Peninsula

Seasonal changes in fish assemblages in the River Minho tidal freshwater wetlands, NW of the Iberian Peninsula

Seasonal dynamics of fish assemblages in an intertidal mudflat of Indian Sundarbans

Stock recovery, spawning period and spawning area expansion of the twaite shad Alosa fallax in the Elbe estuary, southern North Sea

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