Seasonal and short spatial patterns in European hake (Merluccius merluccius L.) recruitment process at the Balearic Islands (western Mediterranean): The role of environment on distribution and condition

Hidalgo, Manuel; Massutí, Enric; Moranta, Joan; Cartes, Joan Enric; Lloret, Josep; Oliver, Pere; Morales‐Nin, Beatriz

doi:10.1016/j.jmarsys.2007.03.005

Cited by 58 publications

(47 citation statements)

References 48 publications

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“…These characteristics affect the diet, with P. blennoides being a species mostly benthic feeder, while M. poutassou is more related to the pelagic realm. However, ontogenetic shifts in diet occur for these species, feeding on small crustaceans when they are recruits and switching to a predominantly ichtyophagous diet when reaching adulthood (Cohen et al 1990, Massutí et al 1996, Hidalgo et al 2008.…”

Section: Case Studymentioning

confidence: 99%

“…Because ontogenetic changes in habitat use related to depth are known for these species (Cohen et al 1990, Massutí et al 1996, Hidalgo et al 2008, only VMS signals within the same bathymetric range were included in the monthly average per haul. To assess the degree of lasting fishing impact, we explored accumulated effects of effort intensity on fish condition in the longer scale (1 yr), calculating the annual mean of the monthly averages before the survey for each haul.…”

Section: Fishing Impactmentioning

confidence: 99%

“…For example, intra-specific competition has shown opposite influences on body condition, from positive (Orlova et al 2010, Kjesbu et al 2014) to negative (Casini et al 2006, Sandeman et al 2008 or not significant (Carscadden andFrank 2002, Kjesbu et al 2014). The effect of surface chlorophyll a is often positive (Basilone et al 2006, Rueda et al 2014, though its influence is observed at different temporal lags (Hidalgo et al 2008, Rueda et al 2014). In addition, several authors described a negative effect of fishing on body condition (e.g., Choi et al 2004, Hiddink et al 2011, Lloret et al 2014, whereas others have detected positive effects at low levels of fishing pressure (Giacalone et al 2010) or absence of a statistical significant relationship Planes 2003, Giacalone et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, ontogeny plays a crucial role in the allocation of the energy stored by individuals due to trade-offs between the main biological processes (e.g., changes in diet, foraging behavior or reproduction activity) resulting in inter-and intraspecific ontogenetic differences in fish condition (Gunderson 1997, Hidalgo et al 2008). Thus, ontogeny may indirectly affect the sensitivity of fish condition to the external biological, environmental or anthropogenic drivers.…”

Section: Introductionmentioning

confidence: 99%

“…Hence we apply spatially explicit models, which allow distinguishing both regional effects around the islands as well as the local changes in the responses. Finally, because the response of fish condition to external drivers depends on the ontogenetic stage, which have been reported for these species (Macpherson 1978, Massutí et al 1996, Hidalgo et al 2008, we have accounted for such ontogenetic variability by analyzing the investigated effects for each life history stage separately and, thus, being able to detect both regional and local processes across species and ontogeny.…”

Section: Introductionmentioning

confidence: 99%

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Effect of intra‐specific competition, surface chlorophyll and fishing on spatial variation of gadoid's body condition

et al. 2015

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Abstract. Fish condition indices can be used as biological indicators of the health of individuals and are influenced by numerous external and internal drivers. Like most essential biological traits, they are very sensitive to the spatial heterogeneity occurring in marine ecosystems, which appears at many observational scales. This brings out different ecological processes that can only be revealed either regionally or locally. The scale-dependent spatial variability concerns not only environmental factors, but also anthropogenic activities such as fishing. Understanding these relationships is crucial for improving the spatial management of marine resources, because fish condition considerably affects the sustainability of populations. We explore the influence of density-dependent (intra-specific competition) and densityindependent variables (surface chlorophyll a concentration and fishing impact) on fish condition of three species of harvested gadoids (Merluccius merluccius, Phycis blennoides and Micromesistius poutassou) of the benthopelagic communities off the Balearic Islands (western Mediterranean). This area is characterized by high spatial heterogeneity in the environmental processes and fishing impact. Results show contrasting responses in body condition to the investigated covariates, with species-specific and ontogenetic differences sensitive to the spatial scale of analysis. Some of these responses occur at regional level, while others are more sensitive to local variation. Intra-specific competition shows a very clear effect, which depends on the ontogeny, identifying aggregation areas for recruits and limitation of resources for older individuals. Surface chlorophyll a has always a species-specific regional effect, despite gadoids have a more benthic behavior. Fishing effort displays a heterogeneous impact on fish condition. While spatially contrasting effects are observed at local scale, non-linear regional patterns occur, with positive effects of fishing pressure at intermediate levels. Models analyzing the influence of external drivers in essential fish biological traits such as body condition should consider the spatial variation in responses, especially in highly heterogeneous areas where anthropogenic activities occur. Failing to do so may hide local ecological processes that can be crucial for the persistence of fish populations, which is of paramount relevance for the regional assessment and spatial management of marine exploited resources.

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Section: Case Studymentioning

confidence: 99%

Section: Fishing Impactmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of intra‐specific competition, surface chlorophyll and fishing on spatial variation of gadoid's body condition

et al. 2015

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Condition and Health Indicators of Exploited Marine Fishes

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Local, Seasonal, and Yearly Condition of Juvenile Greenland Halibut Revealed by the Le Cren Condition Index

et al. 2021

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An understanding of biological characteristics, such as growth patterns, condition, and energy reserves, is important for better understanding the environmental constraints exerted on fish populations. This is especially true for exploited fish stocks in the current context of climate change. Using biological data collected from 2006 to 2009 during bottom trawl research surveys by Fisheries and Oceans Canada in the estuary and Gulf of St. Lawrence (EGSL) as well as data from 2000 to 2018 in the northwest Atlantic, we sought to improve our knowledge on the seasonal condition of Greenland Halibut Reinhardtius hippoglossoides juveniles and to better understand the divergence in some life history traits between juveniles captured in these two regions. We validated the use of the Le Cren condition index and evaluated its relationship with energetic status in juvenile (20-32-cm TL) Greenland Halibut. In the EGSL, juvenile condition was higher in winter and spring compared to summer and fall. Such variations may result from this species' pelagic predation activity and prey availability. Juveniles captured in the EGSL during 2016-2017 were larger but had a lower condition index than those captured in the northwest Atlantic, but we found no indication of earlier sexual maturation in the EGSL that could explain the sex ratio differences we observed in catches from these two areas.

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Seasonal and short spatial patterns in European hake (Merluccius merluccius L.) recruitment process at the Balearic Islands (western Mediterranean): The role of environment on distribution and condition

Cited by 58 publications

References 48 publications

Effect of intra‐specific competition, surface chlorophyll and fishing on spatial variation of gadoid's body condition

Effect of intra‐specific competition, surface chlorophyll and fishing on spatial variation of gadoid's body condition

References

Local, Seasonal, and Yearly Condition of Juvenile Greenland Halibut Revealed by the Le Cren Condition Index

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