2020
DOI: 10.1111/fog.12464
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Changes in the spawning habitat of two small pelagic fish in the Northwestern Mediterranean

Abstract: We investigated the effects of three sea surface oceanographic variables (temperature, salinity, and chlorophyll a) on the abundance of eggs and larvae of two summer‐spawning species in the NW Mediterranean Sea, the anchovy Engraulis encrasicolus and the round sardinella Sardinella aurita, based on data from ichthyoplankton surveys carried out in the 1980s, 2000s, and 2010s. The environmental data showed an increase in seawater temperature and salinity along time, coupled with a decrease in chlorophyll a (prox… Show more

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Cited by 24 publications
(35 citation statements)
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“…Due to the mid trophic level position of sardines and anchovies and their key roles in the ecosystem of the western Mediterranean Sea (Coll et al, 2008(Coll et al, , 2019, a reduction on their populations could impact the ecosystem dynamics across entire marine food web, from species that mainly prey on these forage fish to the dynamics of plankton (Tudela and Palomera, 1999;Navarro et al, 2017;Coll et al, 2019). For both species, optimal environmental values (SST and SSS) will be exceeded, first for sardine but eventually for anchovy, too, in combination with a reduction of eggs and larvae of anchovy in the last decades in GSA06 (Maynou et al, 2020) since the reproduction success of sardine and anchovy are highly influenced by SST and SSS condition (Palomera et al, 2007). The areas that will keep a probability of occurrence higher than 0.70 are around the Rhone River in the GSA07 and around the Ebro river in the GSA06 for both sardine and anchovy, and waters around the Gulf of Alicante for anchovy.…”
Section: Discussionmentioning
confidence: 99%
“…Due to the mid trophic level position of sardines and anchovies and their key roles in the ecosystem of the western Mediterranean Sea (Coll et al, 2008(Coll et al, , 2019, a reduction on their populations could impact the ecosystem dynamics across entire marine food web, from species that mainly prey on these forage fish to the dynamics of plankton (Tudela and Palomera, 1999;Navarro et al, 2017;Coll et al, 2019). For both species, optimal environmental values (SST and SSS) will be exceeded, first for sardine but eventually for anchovy, too, in combination with a reduction of eggs and larvae of anchovy in the last decades in GSA06 (Maynou et al, 2020) since the reproduction success of sardine and anchovy are highly influenced by SST and SSS condition (Palomera et al, 2007). The areas that will keep a probability of occurrence higher than 0.70 are around the Rhone River in the GSA07 and around the Ebro river in the GSA06 for both sardine and anchovy, and waters around the Gulf of Alicante for anchovy.…”
Section: Discussionmentioning
confidence: 99%
“…We estimated the future potential spatial distribution of the early life stages of the two summerspawning small pelagic fish (anchovy and round sardinella) based on a regression model parameterized with ichthyoplankton survey data and in situ environmental data (Maynou et al 2020) to delineate the habitat where the environmental conditions will be suitable for spawning (Fig. 2).…”
Section: Species Distribution Modelmentioning
confidence: 99%
“…These variables are good descriptors of the spawning habitat and larval environment of both species in the study area (Palomera et al 1997;Maynou et al 2014). Briefly, Maynou et al (2020) estimated the spatial distribution of the early life stages of anchovy and round sardinella from the ichthyoplankton survey data obtained in three summer sampling programmes, which occurred in 1983, from 2003-2004 and from 2011-2012, where ichthyoplankton were sampled simultaneously with hydrographic data on a grid of stations (Fig. 1).…”
Section: Species Distribution Modelmentioning
confidence: 99%
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“…Furthermore, recent studies have documented a decrease in biological productivity, likely due to a decrease in riverine runoff waters (Colella et al 2016, Cozzi et al 2019. Overall, these conditions would not be suitable for the development of S. aurita larvae (Maynou et al 2020).…”
Section: Analysis Of Larval Survival Based On Growth and Mortality Ratesmentioning
confidence: 99%