Title

A Bank Divided: Quantifying a Spatial and Temporal Connectivity Break Between the Campeche Bank and the Northeastern Gulf of Mexico

Document Type

Article

Publication Date

1-2017

Keywords

Grouper, Ephinephelus morio, Reef fish larvae, red grouper, Marine Populations, Invasive Lionfish, Pterois volitans, Mortality, Duration, Recruitment, Atlantic

Publication Title

Marine Biology

ISSN

0025-3162

Volume

164

First Page

1

Last Page

12

Peer Reviewed

1

Abstract

Marine connectivity over seascapes enables the persistence of metapopulations and is often regulated in part by an organism’s pelagic larval duration (PLD), fecundity, mortality, and ocean conditions. The Campeche Bank (CB) in the southern Gulf of Mexico flanks the strong-flowing Loop Current and is important ecologically and economically in the context of mesoscale connectivity to the Gulf. Here we use a biophysical model to examine connectivity between the CB and the northeastern Gulf (NEGOM) of simulated populations of lionfish (Pterois volitans/miles), red grouper (Epinephelus morio), and a generic marine organism. Our purpose was to assess longitudinal connectivity across the CB to the NEGOM and also to quantify this connectivity over a range of PLDs and organism fecundities. From this work, we find that portions of the northeastern perimeter of the CB in water depths between 50 and 300 m are the majority sources of lionfish and red grouper recruits to the NEGOM. This finding is important as deep waters on the bank are often heavily targeted by commercial fishers and are also beyond the reach of present lionfish control regimes. We also demonstrate that buoyant larvae must remain in the water column for a minimum of ten days to reach the NEGOM from the CB given prevailing water flow, though 45–50 days provides maximum connectivity. These findings are relevant for invasive species control, fisheries management, ecosystem services, and preserving metapopulations of marine fauna sympatric to the both regions.

Comments

©Springer-Verlag Berlin Heidelberg 2016

Additional Comments

The online version of this article (doi:10.1007/s00227-016-3038-0) contains supplementary material, which is available to authorized users.

DOI

10.1007/s00227-016-3038-0

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