Connectivity of lobster populations in the coastal Gulf of Maine

Xue, Huijie; Incze, Lewis S.; Xu, Danya; Wolff, Nicholas H.; Pettigrew, Neal R.

doi:10.1016/j.ecolmodel.2007.07.024

Cited by 109 publications

(117 citation statements)

References 43 publications

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“…Though this study finds a high dispersal potential of anchovy larvae up to 500 km across the Black Sea in just 36 days, as well as a strong climateinduced interannual variability, these results are on similar scales to other connectivity studies that have been carried out in different seas, such as on anchovy larvae in the Benguela Parada et al, 2003) and Peru regions (Xu et al, 2013), benthic larvae in the Caribbean Sea (Cowan et al, 2006), Antarctic krill larvae in the Scotia Sea (Fach and Klinck, 2006;, as well as Lobster larvae in the Gulf of Maine (Xue et al, 2008;Incze et al, 2010). For example, it has been shown that in the southern Benguela important spawning grounds of anchovy may be hundreds of kilometers away from nursery areas (Parada et al, 2003), while for different reef fishes in the Caribbean, typical dispersal distances were on the order of tens to hundreds of kilometers (Cowen et al, 2006).…”

Section: Discussionsupporting

confidence: 74%

“…The scheme was chosen because it is simple and computationally efficient and the choice of a very small time step (dt = 1 min) makes it comparable to a second-order accurate scheme ensuring appropriate accuracy. Sub-grid scale dispersion processes that cannot be resolved by discrete velocity fields are known to influence particle trajectories and are often included in particle tracking algorithms by superimposing a random walk term for each particle and time step (Cowen et al, 2006;Xue et al, 2008). This is omitted in this study because the satellite-based estimate of the surface circulation is already a rough approximation of the actual flow field that accounts for only the geostrophic part of the flow and artificially adding dispersion will not enhance simulation results.…”

Section: Lagrangian Particle Trackingmentioning

confidence: 99%

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Untitled

Fach¹

2014

Turk. J. Fish. Aquat. Sci.

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Dispersal mechanisms of Black Sea anchovy larvae (Engraulis encrasicolus ponticus) across the Black Sea were studied with an individual based anchovy larvae model embedded in a Lagrangian model using surface currents calculated from daily dynamic height topography maps of altimeter data during a period of three years (2001)(2002)(2003). Particles representing anchovy eggs were released at different sites during June to August and their movement was tracked over time. Drifters were advected for 36 days, representing the time it generally takes for anchovy eggs to develop into juveniles. Each individual was subject to somatic growth whose temperature dependence was calculated from satellite derived sea surface temperature data.Model results indicate that larval dispersal in the Black Sea is strongly controlled at the basin scale by the Rim Current circulation and its two cyclonic basin-wide gyres. It is locally controlled by mesoscale eddies. Consistent with the observed circulation fields, a strong meridional transport exists from the northern to the southern coastal zone along the western coast and the central basin. The peripheries of both the western and the eastern cyclonic gyres are also associated with strong larval transport from the southern coast to offshore areas. Elsewhere the connectivity between different regions is not as well pronounced due to weaker and patchy current fields. Variability in the dispersal of larvae is considerable when comparing different years and seasons and should be taken into account when designing networks of Marine Protected Areas in the Black Sea. Keywords: Black Sea anchovy larvae, Black Sea circulation, connectivity, Lagrangian modeling, temperature dependence. Karadeniz'deki Hamsi Dağılımı ve Bölgeler Arası Bağlantısı üzerine Hidrodinamik Proseslerin Etkisinin Modellenmesi ÖzetKaradeniz hamsi larvalarının (Engraulis encrasicolus ponticus) Karadeniz baseninde dağılım mekanizmaları, geliştirilen bir birey tabanlı hamsi larva modelinin üç yıllık (2001)(2002)(2003) altimetre verisinden hesaplanmış yüzey akıntıları kullanılarak bir Lagrangian modeline entegrasyonu ile araştırılmıştır. Model içinde hamsi yumurtalarını temsil eden parçacıklar HaziranAğustos ayları arasında farklı noktalarda bırakılmış ve zamana bağlı hareketleri takip edilmiştir. Hamsi yumurtalarının juvenil bireye gelişim süresi (ortalama) olan 36 gün boyunca model içinde bu parçacıklar akıntıya bağlı hareket etmiştir. Daha sonra bu bireylerin uydu verisinden hesaplanan yüzey suyu sıcaklık verisine bağlı olarak somatik büyümeleri hesaplanmıştır.Model sonuçları göstermiştir ki Karadeniz'de basen ölçeğinde larval dağılımı kontrol eden en büyük faktör kıyı akıntısı (Rim Current) ve iki büyük ölçekli siklonik döngüdür. Yerel ölçekte ise orta ölçek (mesoscale) girdaplar önem kazanır. Gözlemlenen akıntı sistemleri ile de tutarlı olarak, orta ve batı basende kuzey kıyılarından güneye güçlü bir boylamsal taşınım oluşur. Model sonuçları ayrıca batı ve doğu siklonik döngülerinin çevrelerinde güney sahillerinden ...

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Section: Discussionsupporting

confidence: 74%

Section: Lagrangian Particle Trackingmentioning

confidence: 99%

Untitled

Fach¹

2014

Turk. J. Fish. Aquat. Sci.

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“…The significant correlation of youngof-year and older juveniles at the same sites, together with our longer-term time series at these locations and previous larval transport modelling , suggests spatial differences in recruitment are relatively consistent year to year, resulting in recruitment hot and cold spots. Advective processes influencing larval and postlarval transport could be responsible for consistent along-shore heterogeneity in settlement to coastal nurseries Xue et al 2008;Chassé & Miller 2010;Incze et al 2010). However, as has been shown for other benthic species (Burke 1986;Pearce & Figure 6.…”

Section: Discussionmentioning

confidence: 99%

“…However, it has been limited to the shallow waters of the coastal New England states in the US, and two locations in Atlantic Canada. Nursery populations in coastal New England have been reasonably well described, and these data have been used recently to validate spatial and temporal patterns of young-of-year recruitment (Xue et al 2008;Wahle et al 2009a;Incze et al 2010). Although perhaps not as efficient as suction sampling at detecting the smallest lobsters, visual quadrat and transect surveys by divers are nonetheless effective means of quantifying older juveniles and inferring nursery locations (Bernstein & Campbell 1983;Hudon 1987;Steneck & Wilson 2001;Gendron & Sainte-Marie 2006).…”

Section: Introductionmentioning

confidence: 99%

The geography and bathymetry of American lobster benthic recruitment as measured by diver-based suction sampling and passive collectors

Wahle

Bergeron

Tremblay

et al. 2013

Marine Biology Research

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We present results of an international collaboration to survey American lobster Homarus americanus Milne-Edwards, 1837 nurseries in Atlantic Canada and the northeast United States from 2007 to 2009 under a standardized protocol involving two sampling methods, diver-based suction sampling and passive collectors. We surveyed young-of-year and older juveniles at 191 sampling sites over 39 sampling areas considerably expanding the known depth range and geographic limits of benthic recruitment. Young-of-year densities were strongly correlated in space with the abundance of older juveniles, signifying consistently strong settlement in the Gulf of Maine, lower Bay of Fundy, southwestern Nova Scotia and southern Gulf of St. Lawrence, and relatively weak settlement in southern New England, eastern coastal Nova Scotia and Newfoundland, a pattern consistent with commercial lobster harvests. Passive collectors elucidated bathymetric patterns of young-of-year recruitment in oceanographically contrasting regions. Although we observed young-of-year lobsters as deep as 80 m, they were most abundant above the thermocline in summer-stratified regions, such as the western Gulf of Maine and southern New England, and depth-wise differences were less extreme in thermally mixed waters of the eastern Gulf of MaineÁFundy region, a finding consistent with previous observations that postlarvae concentrate above the thermocline. Between the two samplers, we detected no sampling bias for young-of-year lobsters, although collectors may slightly underrepresent older juveniles entering from the surrounding sea bed. Finally, we found that interactions between juvenile lobsters and suspected predators or competitors in collectors, such as crabs and fishes, are weak and unlikely to bias collector results.

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“…En estos modelos la dinámica poblacional es el resultado del destino y evolución de individuos en su ambiente al cual están ligados por relaciones funcionales. Esta aproximación ha permitido mejorar la comprensión de la variabilidad temporal y espacial de los recursos marinos y sus relaciones con el ambiente aportando significativamente a las ciencias pesqueras (Brochier et al, 2008;Xue et al, 2008;Parada et al, 2010a), así como también aparece como la aproximación más prometedora hacia el asesoramiento pesquero.…”

Section: Introductionunclassified