Links between parasitism, energy reserves and fecundity of European anchovy,<i>Engraulis encrasicolus</i>, in the northwestern Mediterranean Sea

Ferrer-Maza, Dolors; Lloret, Josep; Muñoz, Marta; Faliex, Elisabeth; Vila, Silvia; Sasal, Pierre

doi:10.1093/conphys/cov069

Cited by 24 publications

(24 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the light of the current small pelagic fish situation in the Gulf of Lions, characterized by small sardine and anchovy in poor condition [33,54], our results indicate that the individual reproductive potential could be strongly affected both in terms of quantity and quality. However, earlier maturation could potentially lead to a higher number of breeders and compensate at the population level for the decrease in individual reproductive capacity, as described in other short-lived species such as Daphnia [92] or insects [93].…”

Section: Discussionmentioning

confidence: 93%

“…Three sieves with a mesh size ranging from 600 to 250 µm were used to sort the oocytes by size. Oocyte size distribution followed a bimodal distribution and eggs belonging to the next batch were counted based on their size as defined in [39,54] for anchovy. Counting of oocytes was performed with an image analysis system (Image-Pro Plus 5.1; ).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction

et al. 2016

Self Cite

View full text Add to dashboard Cite

Limited resources in the environment prevent individuals from simultaneously maximizing all life-history traits, resulting in trade-offs. In particular, the cost of reproduction is well known to negatively affect energy investment in growth and maintenance. Here, we investigated these trade-offs during contrasting periods of high versus low fish size and body condition (before/after 2008) in the Gulf of Lions. Female reproductive allocation and performance in anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) were examined based on morphometric historical data from the 1970s and from 2003 to 2015. Additionally, potential maternal effects on egg quantity and quality were examined in 2014/2015. After 2008, the gonadosomatic index increased for sardine and remained steady for anchovy, while a strong decline in mean length at first maturity indicated earlier maturation for both species. Regarding maternal effects, for both species egg quantity was positively linked to fish size but not to fish lipid reserves, while the egg quality was positively related to lipid reserves. Atresia prevalence and intensity were rather low regardless of fish condition and size. Finally, estimations of total annual numbers of eggs spawned indicated a sharp decrease for sardine since 2008 but a slight increase for anchovy during the last 5 years. This study revealed a biased allocation towards reproduction in small pelagic fish when confronted with a really low body condition. This highlights that fish can maintain high reproductive investment potentially at the cost of other traits which might explain the present disappearance of old and large individuals in the Gulf of Lions.

show abstract

Section: Discussionmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…This is particularly clear for anchovy in some areas, such as the NW Mediterranean, where small sized less fecund individuals presenting lower fecundity (McBride et al, 2015) in a low health status (i.e. lower lipid content and higher intensity of certain parasites, Ferrer-Maza et al, 2016a are dominant in the population.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, condition indices can be computed easily from collected length and weight data, available in numerous areas and at large temporal scale. It has already been demonstrated that environmental factors, such as temperature, food availability (Brosset et al, 2015b) or parasitism (Ferrer-Maza et al, 2016b) influence fish condition through direct and/or indirect effects. For example, a decrease in body condition due to a lack of food or an increase of metabolic costs under higher temperature has already been advocated in several studies (see e.g.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas

Brosset

Fromentin

Beveren

et al. 2017

Progress in Oceanography

Self Cite

View full text Add to dashboard Cite

show abstract

“…Simple measures of condition factor and energy reserves are informative physiological biomarkers of population health ( Claireaux et al ., 2004 ; Jeffrey et al ., 2015 ) that, in this Theme Section, are applied as biomarkers for effects of parasitism in a small pelagic species, the European anchovy ( Engraulis encrasicolus ), in the northwest Mediterranean ( Ferrer-Maza et al ., 2016 ). Some studies have measured physiological indicators of whole-animal performance, such as swimming ability, or hypoxia and thermal tolerance, including measurements on fishes in mesocosms or caged at specific sites ( Claireaux et al ., 2004 ; McKenzie et al ., 2007 ; Roze et al ., 2013 ).…”

Section: Applications For Physiological Biomarkersmentioning

confidence: 99%

Conservation physiology of marine fishes: state of the art and prospects for policy

et al. 2016

View full text Add to dashboard Cite

The state of the art of research on the environmental physiology of marine fishes is reviewed from the perspective of how it can contribute to conservation of biodiversity and fishery resources. A major constraint to application of physiological knowledge for conservation of marine fishes is the limited knowledge base; international collaboration is needed to study the environmental physiology of a wider range of species. Multifactorial field and laboratory studies on biomarkers hold promise to relate ecophysiology directly to habitat quality and population status. The ‘Fry paradigm’ could have broad applications for conservation physiology research if it provides a universal mechanism to link physiological function with ecological performance and population dynamics of fishes, through effects of abiotic conditions on aerobic metabolic scope. The available data indicate, however, that the paradigm is not universal, so further research is required on a wide diversity of species. Fish physiologists should interact closely with researchers developing ecological models, in order to investigate how integrating physiological information improves confidence in projecting effects of global change; for example, with mechanistic models that define habitat suitability based upon potential for aerobic scope or outputs of a dynamic energy budget. One major challenge to upscaling from physiology of individuals to the level of species and communities is incorporating intraspecific variation, which could be a crucial component of species’ resilience to global change. Understanding what fishes do in the wild is also a challenge, but techniques of biotelemetry and biologging are providing novel information towards effective conservation. Overall, fish physiologists must strive to render research outputs more applicable to management and decision-making. There are various potential avenues for information flow, in the shorter term directly through biomarker studies and in the longer term by collaborating with modellers and fishery biologists.

show abstract

Links between parasitism, energy reserves and fecundity of European anchovy,Engraulis encrasicolus, in the northwestern Mediterranean Sea

Cited by 24 publications

References 43 publications

Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction

Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction

Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas

Conservation physiology of marine fishes: state of the art and prospects for policy

Contact Info

Product

Resources

About