Propagule dispersal and larval patch cohesiveness in a Mediterranean coastal fish

Calò, Antonio; Franco, Antonio; Benedetto, Giuseppe E. De; Pennetta, Antonio; Pérez-Ruzafa, Ángel; García-Charton, José Antonio

doi:10.3354/meps11609

Cited by 12 publications

(20 citation statements)

References 53 publications

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“…However, due to the potential for wide dispersal and high mortality, it is very difficult to track the movements of larvae using otolith chemistry. This has led some to infer the number of distinct natal sources and the spatial scale over which larval dispersal takes place from a cluster analysis of near‐core ablation chemistry (Calò et al., ; Gibb, Regnier, Donald, & Wright, ).…”

Section: Introductionmentioning

confidence: 99%

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Assessing the role of ontogenetic movement in maintaining population structure in fish using otolith microchemistry

Wright

Regnier

Gibb

et al. 2018

Ecology and Evolution

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Identifying the mechanisms maintaining population structure in marine fish species with more than a single dispersing life stage is challenging because of the difficulty in tracking all life stages. Here, a two‐stage otolith microchemistry approach to examining life‐stage movement was adopted, tracking a year‐class from the juvenile to adult stage and inferring larval sources from clustering, in order to consider the mechanisms maintaining population structuring in North Sea cod. Clustering of near‐core chemistry identified four clusters, two of which had either a southern or northern affinity and were similar to juvenile edge chemistry. The other two clusters, common to the central North Sea, had intermediate chemical composition and may have reflected either larval mixing in this region or a lack of geographic heterogeneity in the elemental signature. From the comparison of whole juvenile and the corresponding component of adult otoliths, adults from the southern North Sea mostly recruited from adjacent nursery grounds. In contrast, many adults in the northern North Sea had a juvenile chemistry consistent with the Skagerrak and juveniles from the northern Skagerrak site had a near‐core chemistry consistent with the northern North Sea. Similarities in otolith chemistry were consistent with retention of early life stages at a regional level and also juvenile and adult fidelity. The links between the northern North Sea and Skagerrak indicate natal homing, which when considered in the context of genetic evidence is suggestive of philopatry. The approach used here should be useful in exploring the mechanisms underlying population structuring in other species with multiple dispersive life stages and calcified hard parts.

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Section: Introductionmentioning

confidence: 99%

“…This has led some to infer the number of distinct natal sources and the spatial scale over which larval dispersal takes place from a cluster analysis of near-core ablation chemistry (Calò et al, 2016;Gibb, Regnier, Donald, & Wright, 2017).…”

mentioning

confidence: 99%

Assessing the role of ontogenetic movement in maintaining population structure in fish using otolith microchemistry

Wright

Regnier

Gibb

et al. 2018

Ecology and Evolution

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“…Considerable effort has focused on identifying the factors that influence larval transport and dispersal throughout the fluid marine environment (Lubchenko et al, 2003;Leis, 2006;Cowen & Sponaugle, 2009;Calò et al, 2016). While some marine species can disperse during the juvenile and adult phases (e.g.…”

Section: Introductionmentioning

confidence: 99%

El Niño episodes coincide with California moray Gymnothorax mordax settlement around Santa Catalina Island, California

Higgins

Pearson

Mehta

2017

Journal of Fish Biology

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The hypothesis that El Niño events influence the settlement patterns of the California moray Gymnothorax mordax is tested. The pelagic larval duration (PLD) of larval G. mordax is unknown, but studies on leptocephalus of related species suggest that larvae are long-lived, up to 2 years. Gymnothorax mordax, an elusive predatory species and the only muraenid off the coast of California, is considered abundant in the waters around Catalina Island. Thirty-three individuals were collected from Two Harbors, Catalina Island, and otoliths were taken to provide estimates of their age. Settlement year for each individual was backcalculated using estimated age from otolith measurements. These ages were then cross referenced with the Oceanic Niño Index (ONI) developed by the National Oceanographic and Atmospheric Administration (NOAA) to correlate estimated age of settlement with known El Niño years. Of the 33 individuals collected, 30 settled at Catalina Island during El Niño years. The oldest individual in the data-set was 22 years old, placing G. mordax as one of the longer-lived predatory fishes in the system. The present study represents the first account of wild G. mordax ages and suggests that El Niño events have an important role in driving the settlement of recruits towards the northern edge of their range.

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“…For "passive" simulations, the only parameter that differed between Sparidae groups was the pelagic larval duration (PLD). To account for the flexibility in the competency phase, which can span up to several days in Mediterranean species of sea breams (Calò et al, 2016), small Sparidae were considered competent from 13 to 19 days and large ones from 28 to 38 days. Larvae that reached a settlement polygon within their competency period were considered as settled.…”

Section: Biological Parametersmentioning

confidence: 99%

Larval Fish Swimming Behavior Alters Dispersal Patterns From Marine Protected Areas in the North-Western Mediterranean Sea

2018

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Most demersal fishes undergo a dispersal phase as larvae, which strongly influences the connectivity among adult populations and, consequently, their genetic structure and replenishment opportunities. Because this phase is difficult to observe directly, it is frequently simulated through numerical models, most of which consider larvae as passive or only vertically migrating. However, in several locations, including the Mediterranean Sea, many species have been shown to swim fast and orient. Here we use a Lagrangian model to study connectivity patterns among three Mediterranean Marine Protected Areas (MPAs) and compare simulations in which virtual larvae are passive to simulations in which oriented swimming is implemented. The parameterization of behavior is based on observations for two groups of species of the family Sparidae: species with small larvae (i.e., 9-11 mm), displaying a maximum swimming speed of 6 cm s −1 and a pelagic larval duration of 13-19 days (e.g., Diplodus annularis L., Oblada melanura L.) and species with large larvae (i.e., 14-16 mm), displaying a maximum swimming speed of 10 cm s −1 and a PLD of 28-38 days (e.g., Spondyliosoma cantharus L.). Including larval behavior in the model (i) increased the overall proportion of successful settlers, (ii) enhanced self-recruitment within the MPAs, but also (iii) increased the intensity, and (iv) widened the export of eggs and larvae (recruitment subsidy) from the MPAs; overall, it significantly changed connectivity patterns. These results highlight the need to gather the observational data that are required to correctly parameterize connectivity models.

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Propagule dispersal and larval patch cohesiveness in a Mediterranean coastal fish

Cited by 12 publications

References 53 publications

Assessing the role of ontogenetic movement in maintaining population structure in fish using otolith microchemistry

Assessing the role of ontogenetic movement in maintaining population structure in fish using otolith microchemistry

El Niño episodes coincide with California moray Gymnothorax mordax settlement around Santa Catalina Island, California

Larval Fish Swimming Behavior Alters Dispersal Patterns From Marine Protected Areas in the North-Western Mediterranean Sea

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