Predation-mediated recruitment in the Georges Bank fish community

Tsou, Tien-Shui; Collie, Jeremy S.

doi:10.1006/jmsc.2001.1088

Cited by 43 publications

(28 citation statements)

References 4 publications

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“…Females are larger at age than males and consume twice as many fish, by weight. Cannibalism is common in silver hake (Koeller et al 1989, Garrison & Link 2000, Tsou & Collie 2001, Link et al 2012, and, given the size difference between the sexes (Table 5), it is likely that males are routinely preyed upon by females. Because of their smaller size, males may also be preferentially taken by predators other than the females.…”

Section: Discussionmentioning

confidence: 99%

Geospatial analysis of habitat use by silver hake Merluccius bilinearis in the Gulf of Maine

Pereira

Schultz²,

Auster³

2014

Endang. Species. Res.

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Three theories of habitat use proposed for marine fishes, the constant density model (CDM), the proportional density model (PDM), and the basin model (BM), make contrasting predictions of how the range, local density, and fitness change as population size changes. We tested model predictions using a survey of silver hake Merluccius bilinearis conducted by the National Marine Fisheries Service every spring and fall. Data on fish length, sex, weight, and reproductive status are collected. Despite a 50% population reduction over the time period of the survey, the geographic area occupied by silver hake did not change significantly. Local density in preferred habitat remained a constant proportion of the entire population. Fitness (as indicated by individual condition) varied over a fine spatial scale, reflected in a pattern of spatial autocorrelation of 10s to 100s of kilometers. Fitness did not exhibit density dependence, except in one case, females in the fall, probably due to the higher energy needs of the females. The results indicate that silver hake conform to the PDM, a site-dependent model, and yet we found some evidence of density dependence in our measure of fitness. Site dependence may work in concert with density dependence to regulate population size. Sites silver hake depend on may be the spawning areas along the coast, which may already be in legislatively protected areas. Our study illustrates that an understanding of habitat use is important for crafting conservation or management measures that lead to maintenance of a stable population.

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Section: Discussionmentioning

confidence: 99%

Geospatial analysis of habitat use by silver hake Merluccius bilinearis in the Gulf of Maine

Pereira

Schultz²,

Auster³

2014

Endang. Species. Res.

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“…Predation, therefore, cannot be appropriately inferred from the presence or absence, or abundance, of predators and prey where there is co-occurrence; predators and prey might simply be segregated in space, completely, or partially with overlapping distributions. There is a growing body of evidence that links predation to variation in year classes (Paradis and Pepin, 2001;Tsou and Collie, 2001;Munk, 2002), but direct verification, i.e., the establishment of cause and effect, remains necessary.…”

Section: Insight and Outlookmentioning

confidence: 99%

Fisheries oceanography and the ecology of early life histories of fishes: a perspective over fifty years

Govoni¹

2005

Sci. Mar.

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SUMMARY: Fisheries oceanography can be defined as the study of the ecology of fishes in the ocean: so defined, it comprises study at all levels of ecological organization-organisms, populations, communities, and ecosystems. The early life history of fishes plays out at each of these levels of organization. A paradigm developed by Johan Hjort at the turn of the twentieth century, along with postulates by Hjort and many of his colleagues that followed, came to guide much of fisheries oceanography through the ensuing hundred years. Research themes that address these postulates can be roughly partitioned as the study of the physiological ecology of the eggs and larvae of fishes in the sea, and the study of the abundance and distribution of fish propagules. Using case studies of organisms and physical processes, considerable progress has been made in understanding the causes of variation in population recruitment, defined either by stage-based models and simulated by individual-based models. Some of this progress has been published in Scientia Marina, or its predecessor Investigación Pesquera. The causes of variation, however, are interactive and operative at differing, yet often overlapping, spatial and temporal scales. Difficulty in matching spatial scales that typically differ by an order of magnitude or more, will continue to trouble the resolution of causes of population recruitment. Moreover, study of the causes of variation in recruitment has not led to predictive power at an annual scale. Prediction at a decadal scale, using community (or more appropriately larval fish assemblages) and ecosystem level dynamics, is more hopeful. -La oceanografía pesquera puede ser definida como la ecología de los peces en el océano: definida de este modo, comprende el estudio a todos los niveles de organización ecológica: organismos, poblaciones, comunidades y ecosistemas. Los primeros estadios de desarrollo de los peces intervienen en cada uno de estos niveles de organización. El paradigma desarrollado por Johan Hjort a principio de siglo veinte, junto con postulados posteriores del propio Hjort y muchos de sus colegas, han servido de guía de la oceanografía pesquera de los siguientes cien años. Los temas de investigación a que conducen estos postulados pueden ser fundamentalmente divididos en el estudio de la ecología fisioló-gica de los huevos y larvas de peces en el mar y el estudio de la distribución y abundancia de los propágulos. Utilizando el estudio de casos particulares de organismos, se han conseguido considerables progresos en la comprensión de las causas de variación en el reclutamiento de las poblaciones, definido ya sea por los modelos basados en el estadio de desarrollo o en simulaciones basadas en el individuo. Algunos de estos avances han sido publicados en Scientia Marina, o en su predecesora Investigación Pesquera. No obstante, las causas de variación son interactivas y operativas a escalas espaciales y temporales distintas, o incluso solapadas. La dificultad para ajustar las escalas espaciales que típicame...

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“…Therefore, understanding the role of species interactions in regulating populations and community structures is essential to explain past population trajectories and to project potential recoveries of depleted fish stocks (Tsou & Collie 2001). The question whether predator-prey interactions play a stabilizing or destabilizing role for the dynamics of a prey population has received much attention (Magnusson 1995, Wu & Loucks 1995.…”

Section: Introductionmentioning

confidence: 99%

Predator–prey overlap induced Holling type III functional response in the North Sea fish assemblage

Kempf¹,

Floeter²,

Temming³

2008

Mar. Ecol. Prog. Ser.

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Predation-mediated recruitment in the Georges Bank fish community

Cited by 43 publications

References 4 publications

Geospatial analysis of habitat use by silver hake Merluccius bilinearis in the Gulf of Maine

Geospatial analysis of habitat use by silver hake Merluccius bilinearis in the Gulf of Maine

Fisheries oceanography and the ecology of early life histories of fishes: a perspective over fifty years

Predator–prey overlap induced Holling type III functional response in the North Sea fish assemblage

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