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The fishery of the European anchovy Engraulis encrasicolus in the Mediterranean needs several ecological approaches to be properly managed. As such, several surveys were carried out to study the ecology of larvae and juveniles of this species, which reproduces during the warmest period of the year (May through September) in the Gulf of Lions. In particular, we studied the late larvae (15 mm total length until metamorphosis), especially as other authors have focused on larvae below that size. Unexpectedly, we also collected anchovy late larvae during the December 2007 survey, whose range in size corresponded to a later spawning period than previously reported. Differences in the nutritional condition of these larvae were assessed by comparing indices of lipid composition and estimating growth rates from otolith measurements to provide information on the probability of survival between the two groups. The analysis of fatty acids, used as tracers of trophic relationships, indicates that these larvae fed mainly on zooplankton. Nutritional conditions of summer and late autumn larvae were very similar. In contrast, growth rates were higher for August larvae, probably due to the different temperatures in the two seasons. Our results are especially relevant in an ecological context where the increasing mean water temperatures in the Western Mediterranean could favor the extension of the anchovy spawning period up to late-Autumn months.
Journal of the Marine Biological Association of the UK
Feeding of anchovy Engraulis encrasicolus larvae in the north-west Mediterranean2002 •
ICES Journal of Marine Science
A comparison of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) larvae feeding in the Northwest Mediterranean: influence of prey availability and ontogeny2010 •
Morote, E., Olivar, M. P., Villate, F., and Uriarte, I. 2010. A comparison of anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) larvae feeding in the Northwest Mediterranean: influence of prey availability and ontogeny. – ICES Journal of Marine Science, 67: 897–908. The feeding ecology of the larvae of the two most important small pelagic species in the western Mediterranean, anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus), is investigated. Samples were collected in early summer (anchovy) and autumn (sardine). Composition of the diet and prey selectivity were compared over the course of ontogeny in anchovy (2.7–14.5 mm standard length, SL) and sardine (5.5–15.8 mm SL) larvae. Anchovy larvae begin feeding on prey items >150 µm at smaller sizes than sardine larvae, and the diets of both species are based mainly on copepod nauplii and postnauplii. Seasonal differences in the composition of the plankton influenced the contributions of prey types to t...
2012 •
In the Atlantic Ocean, small pelagic fish occasionally execute long distance migrations before they become adults. However, in the Mediterranean Sea, the populations of the most common small pelagic fish, anchovy and sardine, seem to be generally more confined to relatively small areas. Particularly in the NW Mediterranean, local environmental conditions, such as mesoscale events, wind forcing or river run-offs, can contribute to shaping the dispersal patterns of fishes, especially in their early life stages. Intrinsic factors such as dietary preferences, swimming abilities or feeding behavior can also play an essential role in the distribution of the populations in the region. Some studies have been done in the NW Mediterranean in order to elucidate which factors are playing the main roles in the dispersal and in the ecology of anchovy and sardine larvae and juveniles. Nevertheless, a holistic evaluation of all the potential attributes conditioning the distribution of early life history anchovy and sardine is lacking. It is therefore necessary to clearly highlight the most determinant biological and environmental features for the dispersion of the early life stages of anchovy and sardine in the NW Mediterranean. This review of the state-of-the-art in the distribution and the trophic ecology of the larvae and juveniles of these populations, pointing out the main methods utilized, will also help to identify some of the major gaps of knowledge and discrepancies that might conduce to future research.
HAL (Le Centre pour la Communication Scientifique Directe)
Variability in size at maturity of the European anchovy (Engraulis encrasicolus) in the Mediterranean Sea2021 •
2010 •
Age, growth and diet of anchovy were studied for the first time from samples collected in the Bay of Benisaf (west Algerian coast) during summer (spawning period) and autumn (recruitment period) 2007. Age structure and growth parameters were determined by otolith (sagitta) analyses. The von Bertalanffy growth function fitted to age-length data showed that most of anchovy growth is achieved during the first year of life, suggesting that this stock is primarily supported by the smallest age groups and has a strong dependence on recruitment. There were no significant differences between males and females, and pooled mean parameters were: L∞ = 15.61 cm, k = 0.75 per year and t0 = -1.32 years. Whatever the age-class anchovy is strictly zooplanktivorous. Copepods constituted the dominant group (64% O; 81% N), while other crustaceans, mollusc larvae and fish larvae were less represented. The main species of copepods consumed were by order of abundance: Candacia longimana, Oncaea mediterran...
1988 •
2023 •
Kwansei Gakuin University Humanities Review
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Iranian Journal of Science & Technology
A New Model for Predicting Activity and Osmotic Coefficients of Electrolyte Solutions1998 •
Revista Justicia & Derecho
La gestión de casos en los Tribunales Superiores chilenos. Una aproximación teórica desde la perspectiva de la gestión de casos al problema de la (sobre) carga de trabajo y su impacto en la adjudicación2024 •
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الفروق بین الأطفال أحادی وثنائی اللغة فی التمییز البصری2019 •
https://www.sismel.it/pubblicazioni/2028-el-comentario-legitur-a-terencio
El comentario «Legitur» a Terencio, edición crítica y estudio de Iñigo Ruiz Arzalluz, Firenze, SISMEL – Edizioni del Galluzzo, 2024 («Millennio medievale» 129, «Testi» 36), pp. lxxviii-232.Hitos de ciencias económico administrativas
Formación De Una Herramienta Confiable Para Evaluar El Comportamiento De Ciudadanía y La Cultura Organizacional en México2018 •
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Journal of the American Geriatrics Society
Misdiagnosis of Chikungunya Virus Infection: Comparison of Old and Younger Adults2018 •