Larval fish dispersal along an estuarine–ocean gradient

Ramos, Sandra; Paris, Claire B.; Angélico, Maria Manuel

doi:10.1139/cjfas-2016-0325

Cited by 17 publications

(11 citation statements)

References 56 publications

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“…VIF < 10 indicated that the environmental variables were not collinear and were fit for CCA (Graham, 2003;Huang et al, 2017). The importance of the environmental variables was measured by interset correlation coefficients, when the value of interset correlation coefficients ≥| ±0.4| variables were regarded conservatively as biologically important (Rakocinski et al, 1996;Ramos et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

Species Composition and Assemblages of Ichthyoplankton in Sansha Bay, Fujian Province, China

Jiang

Lin

et al. 2021

Front. Mar. Sci.

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Sansha Bay (26.40−27.00°N, 119.50−120.20°E) is a typical semi-enclosed bay, located in northern Fujian Province, China, and adjacent to the East China Sea. The ichthyoplankton species composition and assemblage structure were investigated based on monthly sampling at 25 stations in April−September 2019, covering the important spring and summer spawning seasons in the region. Sampling was conducted in the first 3−5 days of the full moon or new moon phases using a standard plankton net through horizontal and vertical tows during daytime. In total, 25,819 ichthyoplankton samples were collected, of which 25,449 samples (i.e., 24,757 eggs and 692 larvae) were from horizontal tows. For horizontal tow samples, the ichthyoplankton were classified into 58 taxa in 15 orders and 23 families with a combination of external morphology and DNA barcoding analyses, from pelagic to demersal and benthic species. The dominant order was the Gobiiformes, including 23 species (39.7% of all species). The dominant taxa, in terms of relative abundance and frequency of occurrence, consisted of commercially important fishes, such as Setipinna tenuifilis (Valenciennes, 1848) (Engraulidae), Epinephelus akaara (Temminck and Schlegel, 1842) (Serraenidae), Collichthys lucidus (Richardson, 1844), Nibea albiflora (Richardson, 1846) (Sciaenidae), Acanthopagrus schlegelii (Bleeker, 1854), and Pagrus major (Temminck and Schlegel, 1843) (Sparidae), accounting for 78.9% of the horizontal tow samples. Low-valued and small-sized fishes, such as Stolephorus commersonnii Lacepède, 1803 (Engraulidae), Solea ovata Richardson, 1846 (Soleidae), Nuchequula nuchalis (Temminck and Schlegel, 1845), and Photopectoralis bindus (Valenciennes, 1835) (Leiognathidae), were also dominant species, accounting for 11.4% of the horizontal tow samples. The ichthyoplankton assemblage was categorized into five different temporal assemblages based on the cluster and nonmetric multidimensional scaling analysis, namely, April, May, June, July, and August−September (ANOSIM, Global R = 0.656, p < 0.01) with the highest density and richness of ichthyoplankton occurred in May. The spatial distribution pattern showed that the high density (ind./m3) of ichthyoplankton occurred mainly in S12–S25 in Guanjingyang and along the Dongchong Peninsula coastline into Dongwuyang, while low density occurred mainly in S01–S11 in the northwest waters of Sandu Island (ANOVA, F = 8.270, p < 0.05). Temperature, salinity, and chlorophyll a were key factors structuring the ichthyoplankton assemblages in Sansha Bay. In addition, this study revealed the changes of the ichthyoplankton composition, density, and spatial distribution in Sansha Bay over the past three decades.

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Section: Discussionmentioning

confidence: 99%

Species Composition and Assemblages of Ichthyoplankton in Sansha Bay, Fujian Province, China

Jiang

Lin

et al. 2021

Front. Mar. Sci.

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“…In this study, the salinity gradient, water temperature, and inorganic nutrients (especially nitrite, nitrate, and phosphate) were the main variables that affected the larval fish assemblages. Salinity has been widely identified as an important environmental driver of larval fish assemblages (Barletta‐Bergan et al., ; Harris, Cyrus, & Beckley, ; Ooi & Chong, ; Ramos, Paris‐Limouzy, & Angélico, ), controlling the species composition in function of their tolerance to salinity gradients. Water temperature has also been regarded as an important environmental controller, since it is a determinant factor at several stages of a fish life cycle, including gonadal development and spawning (Amorim, Ramos, Elliott, & Bordalo, ; Fincham, Rijnsdorp, & Engelhard, ; Pawson, Pickett, & Witthames, ; Santos et al., ) and growth and survival of ELHS prior to nursery recruitment (Meekan, Carleton, McKinnon, Flynn, & Furnas, ; Vinagre, Santos, Cabral, & Costa, ).…”

Section: Discussionmentioning

confidence: 99%

“…Salinity has been widely identified as an important environmental driver of larval fish assemblages (Barletta-Bergan et al, 2002;Harris, Cyrus, & Beckley, 2001;Ooi & Chong, 2011;Ramos, Paris-Limouzy, & Angélico, 2017), controlling the species composition in function of their tolerance to salinity gradients. Water temperature has also Moreover, it has been shown that nutrient concentrations also have a large influence on the dynamics of ichthyoplankton assemblages (Ramos, Amorim, Elliott, Cabral, & Bordalo, 2012), including the consequent increase in food availability through primary and secondary productivity (Hsieh, Lo, Liu, & Su, 2010;Martin, Cyrus, & Forbes, 1992;Meynecke, Lee, Duke, & Warnken, 2006).…”

Section: Seasonsmentioning

confidence: 99%

Dynamics of early life‐history stages of fish along an estuarine gradient

Santos

Severi

2019

Fisheries Oceanography

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This study aimed to identify the spatial and temporal patterns of composition and distribution of early life‐history stages of fish along an estuarine gradient. Samples were collected quarterly between April 2010 and January 2011 using conical‐cylindrical plankton nets in the Vaza Barris estuarine river system (NE Brazil). A total of 38,781 fish eggs and 3,526 larvae, representing 20 families and 42 taxa, were caught. The most abundant larval taxa were Microgobius meeki, Ctenogobius gr. smaragdus/boleosoma, Gobionellus oceanicus, Ctenogobius gr. stigmaticus/saepepallens/shufeldti, Bairdiella ronchus, Achirus sp., Trinectes sp., Stellifer rastrifer and S. stellifer, accounting together for 34.5% of the total catch. Ichthyoplankton distributions were characterized by high seasonal and spatial variability mainly attributed to the environmental characteristics of the estuary. Overall, lower estuarine region served as important accumulation areas for ichthyoplankton, concentrating the greatest diversity and abundance. Salinity gradient, water temperature, and inorganic nutrients were the main variables that affected the larval fish assemblages, presumably influencing spawning, development and survival of individuals or through their effect on food supply. Moreover, this study reinforced the concept that hydrological variations may have a strong influence on estuarine species retention and marine species immigration. Finally, this study highlights the importance of estuaries for the growth and maintenance of stocks of fish species, and the development of strategies to protect these habitats is of utmost relevance.

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“…Larvae usually enter the Lima estuary between February and July (Ramos et al, 2010;Amorim et al, 2016). Direct settlement occurs inside the estuary (Ramos et al, 2010; Amorim et al, 2018), and most likely in the upper section (Ramos et al, 2010), as indicated by the high larval (Ramos et al, 2017) and newly settled flounder abundances found in this area (Ramos et al, 2010;Mendes et al, 2014;Amorim et al, 2016). As in other estuaries (Elliott & Hemingway, 2002), the spatial distribution of flounder in the Lima estuary varies with age (Ramos et al, 2009;Mendes et al, 2014, Amorim et al, 2018.…”

Section: Introductionmentioning

confidence: 97%

Feeding strategies and body condition of juvenile European flounderPlatichthys flesusin a nursery habitat

Mendes

Ramos²,

Elliott

et al. 2020

J. Mar. Biol. Ass.

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Estuarine habitats are major nurseries for the European flounder Platichthys flesus, with different year classes sharing food and space resources. Hence, an understanding of feeding strategies that optimize resource use and maintain carrying capacity is fundamental for sustainable and successful ecosystem management. The main feeding areas of juvenile European flounder (including 0-group and 1-group age classes) in the Lima estuary (northern Portugal) nursery ground were investigated by integrating stomach content analyses with stable isotopic values (δ13C and δ15N) and fish condition indices (Fulton K and RNA:DNA ratio). The 0-group flounder that were associated with the upstream section of the estuary presented the lowest δ13C value (−25.58 ± 1.86‰), while 1-group flounder exhibited a higher δ13C value (−22.59 ± 2.51‰), indicating use of the more saline areas of the estuary (lower and middle sections). The two age groups did not differ in terms of δ15N (0-group: 13.93 ± 0.29‰; 1-group: 13.50 ± 0.96‰), indicating similar trophic levels. The low salinity upper estuary was the main feeding area of 0-group flounder (74%), while 1-group flounder fed along the estuary both upstream (52%) and downstream (48%). Juvenile flounder showed high individual condition based on the Fulton K index (0-group: 1.05 ± 0.08; 1-group: 1.07 ± 0.05) and RNA:DNA (0-group: 1.70 ± 0.70; 1-group: 1.41 ± 0.47). These indices deal with fish health, and hence indicate nursery habitat quality. It is concluded that in this temperate nursery habitat, different feeding strategies sustained the condition of the European flounder juveniles, compared with other flounder populations.

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Larval fish dispersal along an estuarine–ocean gradient

Cited by 17 publications

References 56 publications

Species Composition and Assemblages of Ichthyoplankton in Sansha Bay, Fujian Province, China

Species Composition and Assemblages of Ichthyoplankton in Sansha Bay, Fujian Province, China

Dynamics of early life‐history stages of fish along an estuarine gradient

Feeding strategies and body condition of juvenile European flounderPlatichthys flesusin a nursery habitat

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