Early Life History of the Snook, Centropomus undecimalis, in Tampa Bay, Florida

McMichael, Robert H.; Peters, Kevin M.; Parsons, Glenn R.

doi:10.18785/negs.1002.05

Cited by 56 publications

(70 citation statements)

References 5 publications

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“…En contraste, no hay documentos que registren el desove del robalo común en el AD. El hecho de que C. undecimalis dependa del AM para desovar puede estar relacionado con limitaciones en la producción y freshwater and brackish habitats in the early development stages of C. undecimalis, which provide protection and food during the juvenile stages, after which the adults migrate seaward to spawn (McMichael et al 1989, Peterson and Gilmore 1991, Aliaume et al 2000, Brennan et al 2008. These characteristics of the snook's life cycle could explain the presence of a high proportion of males of small size and weight found in FW, followed by a later increase in the proportion of females, with fish of greater size and weight in MA.…”

Section: Discussionmentioning

confidence: 99%

“…The data recorded included dissolved oxygen and temperature, measured with a field oxymeter (YSI model 95); and salinity, y crías migran hacia estuarios y ríos donde se desarrollan como juveniles y adultos. Se considera que después de alcanzar la madurez gonádica, regresan al mar para incorporarse al banco reproductor (McMichael et al 1989, Tringali y Bert 1996.…”

Section: Methodsunclassified

“…Esta secuencia concuerda con el hermafroditismo secuencial que permite el cambio de macho a hembra conforme crecen los robalos (y otras especies de peces), favoreciendo la prevalencia de hembras grandes (Taylor et al 2000, Perera-García et al 2011, Andrade et al 2013, Hadj-Taieb et al 2013. Esto se relaciona también con el rol de los hábitats dulceacuícolas y salobres durante las etapas tempranas de desarrollo de C. undecimalis, los cuales proporcionan protección y alimento durante la etapa juvenil, previo a su migración como adultos al AM para desovar (McMichael et al 1989, Peterson y Gilmore 1991, Aliaume et al 2000, Brennan et al 2008. Estas características del ciclo de vida de los robalos puede explicar la presencia de una alta proporción de machos de talla y peso pequeños localizados en el AD, seguido más tarde de un incremento en la proporción de hembras, con ejemplares de mayor talla y peso en el AM.…”

Section: Acknowledgmentsunclassified

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Reproductive variability of the common snook, Centropomus undecimalis, in environments of contrasting salinities interconnected by the Grijalva–Usumacinta fluvial system

2014

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The common snook, Centropomus undecimalis, is a migratory euryhaline fish. In the southern Gulf of Mexico, fishing of large snooks occurs mainly in the marine environment (MA), while medium-size adults and juveniles are caught in freshwater environments (FW); however, large-size adults can also be found in FW far away from the sea, and the effect of different environments on their reproductive cycle is unknown. To describe the reproductive cycle of this species in different salinity habitats, we analyzed macroscopic reproductive characteristics during one annual cycle in FW and MA interconnected by the Grijalva–Usumacinta basin. Specimens with full-grown gonads and capable of spawning were found in FW, an unusual condition not reported for this habitat, but active spawning was observed only in MA. Centropomus undecimalis has a biological strategy that allows the use of FW as a juvenile until it reaches sexual maturity as a male and joins the reproductive stock in MA. Adults of both sexes can remain in both FW and MA without affecting their reproductive cycle, suggesting that those that mature in FW migrate to the sea during the spawning season.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsunclassified

Section: Acknowledgmentsunclassified

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Reproductive variability of the common snook, Centropomus undecimalis, in environments of contrasting salinities interconnected by the Grijalva–Usumacinta fluvial system

2014

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“…In this study, salinity did not influence parasite abundance, and this may have been related to the fact that the common snook is considered to be a euryhaline and diadromous species (McMICHAEL et al, 1989;POPE et al, 2006). These fish can be found inhabiting environments of variable salinities (McMICHAEL et al, 1989) and consequently the parasite species may have developed the same resistance over the years due to coevolution.…”

Section: Discussionmentioning

confidence: 56%

“…It is considered to be a diadromous, euryhaline, stenothermic and estuarine-dependent fish found in rivers, estuaries and coastal lagoons and along rocky shores (McMICHAEL et al, 1989;POPE et al, 2006). The common snook is considered to be the largest and also the fastest growing snook of all the species of the genus Centropomus in the Americas, and is a sporting fish of high market value (TUCKER, 2005).…”

Section: Introductionmentioning

confidence: 99%

Development and health status of Centropomus undecimalisparasitized by Rhabdosynochus rhabdosynochus (Monogenea) under different salinity and temperature conditions

Mello

Jerônimo

Tancredo

et al. 2015

Rev. Bras. Parasitol. Vet.

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Development and health status of AbstractThis study evaluated the correlation of hematological parameters with the mean abundance of the monogenean helminth Rhabdosynochus rhabdosynochus in Centropomus undecimalis reared at different temperatures and salinities. The experimental conditions were: 28 °C/0 ppt (parts per thousand); 28 °C/15 ppt; 28 °C/32 ppt; 25 °C/0 ppt; 25 °C/15 ppt; and 25 °C/32 ppt. The prevalence was 100.0% in fish at 28 °C/15 ppt, 28 °C/32 ppt and 25 °C/15 ppt, which was significantly different (p < 0.05) from those at 25 °C/32 ppt. The red blood cell (RBC) count, hematocrit and total leukocyte (WBC) count were significantly higher in fish at 28 °C/15 ppt and 28 °C/32 ppt. The mean abundance of R. rhabdosynochus, hematocrit and RBC showed positive correlations (P < 0.05) with temperature (ρ = 0.3908; ρ = 0.4771 and ρ = 0.2812). Mean abundance showed negative correlations with hemoglobin (ρ = -0.3567) and mean corpuscular hemoglobin concentration (MCHC) (ρ = -0.2684). No correlation between abundance and salinity was detected among the experimental conditions (ρ = -0.0204). The low numbers of monogeneans recorded (min -1 and max -33) explain the few changes to fish health. This suggests that these experimental conditions may be recommended for development of rearing of C. undecimalis in Brazil, without any influence or economic losses from R. rhabdosynochus.

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Resilience of a tropical sport fish population to a severe cold event varies across five estuaries in southern Florida

et al. 2016

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Abstract. For species that are closely managed, understanding population resilience to environmental and anthropogenic disturbances (i.e., recovery trajectories across broad spatial areas) can guide which suite of management actions are available to mitigate any impacts. During January 2010, an extreme cold event in south Florida caused widespread mortality of common snook, Centropomus undecimalis, a popular sport fish. Interpretation of trends using fishery-independent monitoring data in five south Florida estuaries showed that changes in catch rates of adult snook (>500 mm standard length) varied between no effects postevent to large effects and 4-yr recoveries. The reasons for the variation across estuaries are unknown, but are likely related to differences in estuary geomorphology and habitat availability (e.g., extent of deep rivers and canals) and differences in the proportions of behavior contingents (i.e., segments of the population that use divergent movement tactics) that place snook in different areas of the estuary during winter. Emerging awareness of the presence of behavior contingents, identification of overwintering sites, and improvements of abundance indices in remote nursery habitats should provide a better understanding of population resilience to disturbance events for snook. Given that changes in the frequency of short-lived, severe cold events are currently unknown, the findings and management actions described here for a tropical species living at the edge of its distribution should be useful to scientists forecasting the effects of climate change.

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Early Life History of the Snook, Centropomus undecimalis, in Tampa Bay, Florida

Cited by 56 publications

References 5 publications

Reproductive variability of the common snook, Centropomus undecimalis, in environments of contrasting salinities interconnected by the Grijalva–Usumacinta fluvial system

Reproductive variability of the common snook, Centropomus undecimalis, in environments of contrasting salinities interconnected by the Grijalva–Usumacinta fluvial system

Development and health status of Centropomus undecimalisparasitized by Rhabdosynochus rhabdosynochus (Monogenea) under different salinity and temperature conditions

Resilience of a tropical sport fish population to a severe cold event varies across five estuaries in southern Florida

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