Do fish larvae have advantages over adults and other components for assessing estuarine ecological quality?

Ramos, Sandra; Cabral, Henrique N.; Elliott, Michael

doi:10.1016/j.ecolind.2015.03.005

Cited by 30 publications

(12 citation statements)

References 45 publications

(67 reference statements)

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“…By comparing the ammonium concentration in the water column in February 2013 to the values reported in other studies to the Lima system in earlier periods of time (e.g. Saraiva et al, 2007;Ramos et al, 2015;Vieira et al, 2015), we found the most enriched concentrations recorded so far, with maximum values around 5.7 mg L −1 . These observations show a possible decrease of water quality, and should be taken as a warning for future environmental problems before they become acute.…”

Section: Anthropogenic Input Of Nmentioning

confidence: 98%

Use of stable isotope ratios of fish larvae as indicators to assess diets and patterns of anthropogenic nitrogen pollution in estuarine ecosystems

Baeta

Vieira

Lírio

et al. 2017

Ecological Indicators

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Section: Anthropogenic Input Of Nmentioning

confidence: 98%

Use of stable isotope ratios of fish larvae as indicators to assess diets and patterns of anthropogenic nitrogen pollution in estuarine ecosystems

Baeta

Vieira

Lírio

et al. 2017

Ecological Indicators

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“…The estuaries available offer feeding opportunities and protection to offshore advection therefore are used as nursery grounds by many marine species. The present study focused on one of those estuaries, the Lima estuary, a protected area by the Habitats Directive (1992) and the EU Natura 2000 that, in spite of the major anthropogenic modifications at the outer estuary, still encompasses important intertidal saltmarsh areas and natural banks (Ramos et al 2015) and functions as nursery area for some fish species amongst which are economically valuable resources (Ramos et al 2010). The Lima estuary, located off the NW coast is an essential fish habitat and jointly with other estuaries in the vicinity (Cabral et al 2007;Vasconcelos et al 2011b) functions as nursery ground for many species, some of them with high economic importance (Ramos et al 2010).…”

Section: Study Areamentioning

confidence: 99%

Larval fish dispersal along an estuarine–ocean gradient

Ramos

Paris

Angélico

2017

Can. J. Fish. Aquat. Sci.

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The present study investigated the larval fish dispersal along an estuarine–ocean gradient to explore connectivity between ocean and estuaries. During spring 2009, a combined ocean–estuarine survey was conducted along the Lima estuarine salinity gradient and in two transects off the adjacent coast (northwestern Iberian Peninsula), until the 100 m isobaths. Salinity, total particulate matter, particulate organic matter, total dissolved carbon, and dissolved organic carbon reached higher values at the ocean, and chlorophyll a and nutrients increased at the estuary. From the total 56 taxa identified, 14 were present along the gradient, including estuarine species (ES), marine stragglers (MS), and migrants (MM). Canonical correspondence analysis showed that species were separated along the gradient according to their ecological functional classification. MM associated with high salinity were separated from ES correlated with lower salinities and high chlorophyll a concentrations of inner estuary. Flounder (Platichthys flesus) showed a typical spatial gradient of MM, with abundance increasing from the ocean towards inner estuary. The dispersal of larvae along the Lima estuarine–ocean gradient was indicative of connectivity between habitats, emphasizing the need to consider this feature in management plans, mainly for species exploited by commercial fisheries.

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“…Although pH is a conservative variable, results showed that pH increased in the spring-summer period. This might have been associated with the occurrence of phytoplankton blooms, which can lead to changes in the pH of the water due to the release of oxygen or the uptake of carbon dioxide, and also with the decrease of river inputs from adjacent Lima and Cávado Rivers, whose water have lower pH [87].…”

Section: Discussionmentioning

confidence: 99%

Assessing Environmental Control on Temporal and Spatial Patterns of Larval Fish Assemblages in a Marine Protected Area

et al. 2023

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The northern coast of the Iberian Peninsula is an important spawning and nursery area for several marine fish species, some of which are economically exploited by fisheries and under management plans. Larval stages of fish are highly sensitive to environmental change and anthropogenic pressures, and Marine Protected Areas (MPA) can help mitigate the impacts on fish populations. This study investigated the environmental drivers of the temporal and spatial patterns of the larval fish assemblages inhabiting a small coastal MPA along the NW Portuguese Iberian Coast. Seasonal surveys were conducted over two years at nine sampling stations distributed throughout the MPA to collect larval fish samples and water parameters. Results showed that a total of 39 different fish taxa were identified. In terms of abundance, reef-associated species, such as Parablennius gattorugine (54.6%), and marine species that use estuaries as nursery areas, such as Ammodytes tobianus (15.7%) and Clupeidae n.i. (8.8%) dominated the larval fish assemblages. The larval fish assemblages were characterized by a strong temporal pattern that, according to CCA analyses, was related to the temporal variability of water temperature, pH, chlorophyll α, TPM, and also the river flow of an adjacent river. This study showed that 47% of the fish larvae belonged to commercially exploited species, highlighting the importance of this MPA as a nursery area for the early life stages of the fish population. Overall, these new findings emphasize the role of MPAs in ensuring the connectivity of fish species between marine-estuarine habitats and enhancing the conservation of fish populations.

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Do fish larvae have advantages over adults and other components for assessing estuarine ecological quality?

Cited by 30 publications

References 45 publications

Use of stable isotope ratios of fish larvae as indicators to assess diets and patterns of anthropogenic nitrogen pollution in estuarine ecosystems

Use of stable isotope ratios of fish larvae as indicators to assess diets and patterns of anthropogenic nitrogen pollution in estuarine ecosystems

Larval fish dispersal along an estuarine–ocean gradient

Assessing Environmental Control on Temporal and Spatial Patterns of Larval Fish Assemblages in a Marine Protected Area

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