Spatio-temporal dynamics of a fish spawning aggregation and its fishery in the Gulf of California

Erisman, Brad; Aburto‐Oropeza, Octavio; González-Abraham, Charlotte E.; Mascareñas‐Osorio, Ismael; Moreno-Báez, Marcia; Hastings, Philip A.

doi:10.1038/srep00284

Cited by 72 publications

(69 citation statements)

References 35 publications

(48 reference statements)

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“…These significant periodicities are not unlike the period (range = 29.3-29.8 days) and semiperiod (range = 14.6-14.9 days) of the lunar illumination cycle (i.e., synodic cycle). Periodicities in these ranges are not entirely unexpected given the growing number of studies demonstrating that lunar illumination is strongly correlated with a variety of organismal behaviors including animal movement (e.g., Larkin and Keeton, 1978;Grau et al, 1981;Baird et al, 2003;Tsukamoto et al, 2003;DeVries et al, 2004;Fraser, 2006;Pinet et al, 2011;Erisman et al, 2012;Schmidt et al, 2012;Sudo et al, 2014).…”

Section: Timing Of Route Fidelity Movementsmentioning

confidence: 99%

Route Fidelity during Marine Megafauna Migration

Horton

Hauser²,

Zerbini

et al. 2017

Front. Mar. Sci.

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The conservation and protection of marine megafauna require robust knowledge of where and when animals are located. Yet, our ability to predict animal distributions in space and time remains limited due to difficulties associated with studying elusive animals with large home ranges. The widespread deployment of satellite telemetry technology creates unprecedented opportunities to remotely monitor animal movements and to analyse the spatial and temporal trajectories of these movements from a variety of geophysical perspectives. Reproducible patterns in movement trajectories can help elucidate the potential mechanisms by which marine megafauna navigate across vast expanses of open-ocean. Here, we present an empirical analysis of humpback whale (Megaptera novaeangliae), great white shark (Carcharodon carcharias), and northern elephant seal (Mirounga angustirostris) satellite telemetry-derived route fidelity movements in magnetic and gravitational coordinates. Our analyses demonstrate that: (1) humpback whales, great white sharks and northern elephant seals are capable of performing route fidelity movements across millions of square kilometers of open ocean with a spatial accuracy of better than 150 km despite temporal separations as long as 7 years between individual movements; (2) route fidelity movements include significant (p < 0.05) periodicities that are comparable in duration to the lunar cycles and semi-cycles; (3) latitude and bedrock-dependent gravitational cues are stronger predictors of route fidelity movements than spherical magnetic coordinate cues when analyzed with respect to the temporally dependent moon illumination cycle. We further show that both route fidelity and non-route fidelity movement trajectories, for all three species, describe overlapping in-phase or antiphase sinusoids when individual movements are normalized to the gravitational acceleration present at migratory departure sites. Although these empirical results provide an inductive basis for the development of testable hypotheses and future research questions, they cannot be taken as evidence for causal relations between marine megafauna movement decisions and geophysical cues. Experiments Horton et al.Marine Megafauna Route Fidelity on model organisms with known sensitivities to gravity and magnetism, complemented by further empirical observation of free-ranging animals, are required to fully explore how animals use discrete, or potentially integrated, geophysical cues for orientation and navigation purposes.

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Section: Timing Of Route Fidelity Movementsmentioning

confidence: 99%

Route Fidelity during Marine Megafauna Migration

Horton

Hauser²,

Zerbini

et al. 2017

Front. Mar. Sci.

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“…Spawning aggregations are remarkable because they involve species that are usually found singly or in small groups, and are therefore not easy to catch in great numbers. During specific times of the year (usually related to moon phases), large numbers of individuals (thousands, sometimes tens of thousands) migrate to a single locale to spawn (Meyer et al 2007, Erisman et al 2012. These locales remain the same over the years, allowing fishermen to predict and target the time and place of spawning.…”

Section: Spatial Planning and Restorationmentioning

confidence: 99%

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Heyden¹,

Beger²,

Toonen³

et al. 2014

BMS

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ABSTRACT.-Molecular tools and analyses have played pivotal roles in uncovering the processes and patterns of biodiversity in the Indian and Pacific oceans. However, integrating genetic results into management and conservation objectives has been challenging, with few examples that show practical applicability. This review aims to address some of the perceived barriers to an enhanced approach that integrates molecular data into management and conservation goals, by reviewing papers relevant to both conservation and fisheries management in the Indo-Pacific region, particularly with respect to phylogeography, connectivity, and species identification, as well as stock delineation, restoration of depleted wild stocks, mislabeled marine resources and "molecular forensics." We also highlight case studies from each of these areas that illustrate how molecular analyses are relevant to conservation and management in the IndoPacific, spanning a variety of vertebrate and invertebrate species. We discuss the application of genetic data to the design and evaluation of the effectiveness of marine protected area networks, stock delineation, and restoration and the usage of exclusion tests and parentage analyses for fisheries management. We conclude that there is a distinct need for increasing public awareness and ownership of genetically unique lineages and, ultimately, the increased inclusion of genetic research into management policy and conservation. Finally, we make a case for the importance of clear and effective communication for promoting public awareness, public ownership, and for achieving conservation goals within the region.

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“…The decreased reproductive resilience associated with this reproductive strategy is due to both ecological and fishery factors. As an ecological example, climate change can cause a disconnect between the timing and location associated with reproductive success, decreasing productivity (Rijnsdorp et al 2009), whereas from a fisheries perspective, reproductive behavior can impact catchability , with species forming large spawning aggregations at predictable locations and times being more vulnerable to overfishing (Erisman et al 2012).…”

Section: Spatio-temporal Spawning Diversitymentioning

confidence: 99%

Assessing reproductive resilience: an example with South Atlantic red snapper Lutjanus campechanus

Lowerre‐Barbieri¹,

Crabtree²,

Switzer³

et al. 2015

Mar. Ecol. Prog. Ser.

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We developed a conceptual model of reproductive resilience based on spatio-temporal diversity in spawning activity and the 'big old fat fecund female fish' effect, i.e., trends in reproductive traits with size and age. We chose red snapper Lutjanus campechanus as our case study, as this species is highly fecund, currently overfished, and long-lived (50+ yr). The intrinsic reproductive resilience of red snapper was assessed in terms of spawning site distribution, variability in time of spawning, and potential reproductive lifespan. To assess how age truncation might erode reproductive resilience, we evaluated the strength of the relationship between size and age and the following traits: spawning habitat, reproductive timing, batch fecundity, and egg quality. Few fish were older than 7 yr. Although younger fish occurred in a more restricted range of depths, there was no trend between size or age and depth. Spawning activity was well distributed over space and time, with actively spawning females collected at 92 of 195 sampling sites over an extended spawning season. Larger, older females exhibited longer spawning periods and higher batch fecundities, but neither greater spawning frequency nor egg dry weight. The ratio of the effective to predicted reproductive lifespan at maximum sustainable yield was 31%. Many parameters estimated in this study are common to fish reproductive studies, but we hope that integrating them into a reproductive resilience framework will help focus the need for research on the underlying relationships between reproductive traits and stock productivity.

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Spatio-temporal dynamics of a fish spawning aggregation and its fishery in the Gulf of California

Cited by 72 publications

References 35 publications

Route Fidelity during Marine Megafauna Migration

Route Fidelity during Marine Megafauna Migration

The application of genetics to marine management and conservation: examples from the Indo-Pacific

Assessing reproductive resilience: an example with South Atlantic red snapper Lutjanus campechanus

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