Whitemouth croaker, Micropogonias furnieri, trapped in a freshwater coastal lagoon: a natural comparison of freshwater and marine influences on otolith chemistry

Strontium and barium incorporation into otoliths was compared between whitemouth croaker, Micropogonias furnieri, collected from an entrapped freshwater population (Mirim Lagoon) and a normal marine/estuarine population in southern Brazil. Chemical analysis was performed using LA-ICPMS with the objective of validating the effects of marine and freshwater environments on Sr and Ba incorporation as a basis for further investigation of marine and freshwater connectivity of M. furnieri. The freshwater population was dominated by older fish with mean ±SD age of 34±1 y, whereas the coastal samples were dominated by younger fish of 14±7 y. Comparison of strontium and barium incorporation among otolith life-history profiles indicated significantly higher barium and lower strontium for the freshwater population compared to the marine population. Furthermore, comparison of otolith material deposited in the freshwater, estuarine and marine life-history phases demonstrated clear differences among these environments. Mean concentrations of strontium and barium in otoliths of M. furnieri were respectively 710 and 112 µg g-1 for freshwater, 2069 and 16.7 µg g-1 for estuarine, and 2990 and 2.7 µg g-1 for marine life-history phases. Barium concentrations in otoliths from the freshwater population of M. furnieri appeared high relative to other freshwater species. Strontium levels across life-history profiles of marine fish increased with age from 2000 to 2900 µg g-1, possibly indicating more time spent in marine than estuarine waters with age. In contrast, for the freshwater population, strontium levels decreased during the first year of life approximately to 700 µg g-1, and remained low and stable thereafter, consistent with the early life-history occurring in an estuarine environment prior to entrapment in Mirim Lagoon. The results confirm the strong and opposite effects of marine and freshwater environments on incorporation of barium and strontium into otoliths, and indicate that the population of M. furnieri in Mirim Lagoon represents an isolated population that does not reproduce and is therefore likely to become extinct.

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Limited diversity in natal origins of immature anadromous fish during ocean residency

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f10-086 ◽

2010 ◽

Vol 67 (10) ◽

pp. 1699-1707 ◽

Cited By ~ 14

Author(s):

Benjamin D. Walther ◽

Simon R. Thorrold

Keyword(s):

Life History ◽

Early Life History ◽

American Shad ◽

Life History Strategies ◽

Anadromous Fish ◽

First Year ◽

Life History Stage ◽

Northern Summer ◽

Source Populations ◽

First Year Of Life

Variable migration patterns can play a major role in promoting diverse life history traits among populations. However, population and stage-specific movement patterns are generally unknown yet crucial aspects of life history strategies in many highly migratory species. We used a natural tag approach using geochemical signatures in otoliths to identify natal origins of 1-year-old anadromous American shad ( Alosa sapidissima ) during ocean residency. Otolith signatures of migrants were compared with a database of baseline signatures from 20 source populations throughout their spawning range. Samples were dominated by fish from only two rivers, while all other potential source populations were nearly or completely absent. These data support the hypothesis that American shad exhibit diverse migratory behaviors, and immature individuals from populations throughout the native range do not all mix on northern summer feeding grounds. Rather, our results suggest populations of anadromous fish are distributed heterogeneously at sea in the first year of life and thus may encounter different ocean conditions at a critical early life history stage.

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The life-history strategy of deepwater sculpin, Myoxocephalus thompsoni (Girard), in Lake Michigan: dispersal and settlement patterns during the first year of life

Journal of Fish Biology ◽

10.1111/j.1095-8649.1992.tb03872.x ◽

1992 ◽

Vol 41 (sb) ◽

pp. 101-110 ◽

Cited By ~ 22

Author(s):

A. J. Geffen ◽

R. D. M. Nash

Keyword(s):

Life History ◽

Settlement Patterns ◽

Lake Michigan ◽

Life History Strategy ◽

First Year ◽

First Year Of Life

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Life History of the Endemic Saddleback Crayfish, Faxonius medius (Faxon, 1884), (Decapoda: Cambaridae) in Missouri, USA

Freshwater Crayfish ◽

10.5869/fc.2019.v24-1.1 ◽

2019 ◽

Vol 24 (1) ◽

pp. 1-13 ◽

Cited By ~ 1

Author(s):

Robert DiStefano ◽

Jacob Westhoff ◽

Christopher Rice ◽

Amanda Rosenberger

Keyword(s):

Life History ◽

Sympatric Species ◽

First Year ◽

Geographic Context ◽

Ratio Size ◽

Small Streams ◽

History Of ◽

Egg Brooding ◽

First Year Of Life ◽

Sexually Mature

Abstract The saddleback crayfish, Faxonius medius (Faxon, 1884), is endemic to a single drainage in eastern Missouri, USA, that is affected by heavy metals mining, and adjacent to a rapidly-expanding urban area. We studied populations of F. medius in two small streams for 18 months to describe the annual reproductive cycle and gather information about fecundity, sex ratio, size at maturity, and size-class structure. We also obtained information about the speciesâ€™ density at supplemental sites. The species, though rare in a geographic context, is locally abundant; we captured a monthly average of more than 75 F. medius from each of the two study populations. Densities of F. medius were high relative to several sympatric species of Faxonius Cope, 1872 and Cambarus Erichson, 1846. The species exhibited traits of an r-strategist life history; it was relatively short-lived and early to maturity. Its fecundity and egg size were comparable to Ozark congeners. Breeding season occurred in autumn, perhaps extending into early winter. Egg brooding occurred primarily in April. Young-of-year first appeared in samples in June. We estimated that these populations contained 2 to 3 size-classes, and most individuals became sexually mature in their first year of life. Life history information presented herein will be important for future conservation efforts.

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Reproduction and life history strategy of the hermit crab Pagurus bernhardus

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315400034251 ◽

1990 ◽

Vol 70 (1) ◽

pp. 129-142 ◽

Cited By ~ 45

Author(s):

I. Lancaster

Keyword(s):

Life History ◽

Adverse Effects ◽

Littoral Zone ◽

Larval Settlement ◽

Life History Strategy ◽

Hermit Crabs ◽

First Year ◽

Gastropod Species ◽

Pagurus Bernhardus ◽

First Year Of Life

Hermit crabs use gastropod shells to protect their bodies and developing eggs; an inadequate supply of shells of the appropriate size will, therefore, adversely affect their growth, fecundity and longevity. Since the supply of shells is commonly limited, mechanisms that help to reduce these adverse effects will be selectively advantageous. In Pagurus bernhardus it is suggested that two mechanisms have evolved in this respect: larval settlement is encouraged in the littoral zone where gastropod species are diverse and numerous and where the youngest hermits will find growth potentially unrestricted; and females breed within their first year of life and at a size substantially below that which could be attained in the shells commonly available to them. This ‘precocious’ breeding is suggested to be an adaptation enabling hermits to overcome the problems of shell-limitation, since it frees females of the need to attain a specific age or size before reproducing - a situation which would be perilous when large shells are scarce. Males of a similar age are freed from competition for the larger shells as a result of this strategy, since the growth of the females is suppressed while they are ovigerous.

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The Critical First Year of Life: History, Physical Examination, and General Developmental Assessment

Pediatric Clinics of North America ◽

10.1016/s0031-3955(16)38835-6 ◽

1994 ◽

Vol 41 (5) ◽

pp. 859-873 ◽

Cited By ~ 2

Author(s):

Sharon M. Unti

Keyword(s):

Life History ◽

Physical Examination ◽

First Year ◽

Developmental Assessment ◽

First Year Of Life

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Use of a tropical bay in southeastern Brazil by juvenile and subadult Micropogonias furnieri (Perciformes, Sciaenidae)

ICES Journal of Marine Science ◽

10.1016/s1054-3139(02)00272-2 ◽

2003 ◽

Vol 60 (2) ◽

pp. 268-277 ◽

Cited By ~ 16

Author(s):

Marcus R da Costa ◽

Francisco G Araújo

Keyword(s):

Late Summer ◽

Coastal Areas ◽

Southeastern Brazil ◽

Otter Trawl ◽

First Year ◽

White Croaker ◽

Micropogonias Furnieri ◽

New Recruits ◽

First Year Of Life ◽

Spatial Usage

Abstract The white croaker Micropogonias furnieri is a commercially important marine fish that uses bays and other semi-closed coastal areas early in its life. A sampling programme, using beach-seine and otter trawl, was carried out in Sepetiba Bay (22°54′–23°04′S, 43°34′–44°10′W), southern Brazil, from October 1998 to September 1999, with the objective of assessing the patterns of temporal and spatial usage of the bay by white croaker during its early life. Early recruits (total length, TL, 10–50 mm) appear off beaches of the inner bay between October and December, move away from them during late summer and early autumn (January–April), and are caught by trawl offshore from May to September at a TL of 70–150 mm. From May to August, new recruits (10–50 mm) are again found inshore. Fish grow from 10–40 to 70–150 mm during the first year of life in the shallows of the bay, before moving offshore. They cross the deeper waters of the bay as they migrate towards the open ocean. Juveniles (TL 70–150 mm) are most abundant in the inner bay, and subadults (TL 150–200 mm) in the outer and central bay. M. furnieri use semi-closed coastal areas as nursery grounds, before moving out over the continental shelf, where they spawn.

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The Development of Swallowing Respiratory Coordination

Perspectives on Swallowing and Swallowing Disorders (Dysphagia) ◽

10.1044/sasd18.1.19 ◽

2009 ◽

Vol 18 (1) ◽

pp. 19-24

Author(s):

Maggie-Lee Huckabee

Keyword(s):

Cortical Activation ◽

First Year ◽

Healthy Children ◽

Nasal Airflow ◽

Single Session ◽

Primary Finding ◽

Patterns Of Behavior ◽

Cortical Modulation ◽

First Year Of Life ◽

Swallowing Apnea

Abstract Research exists that evaluates the mechanics of swallowing respiratory coordination in healthy children and adults as well and individuals with swallowing impairment. The research program summarized in this article represents a systematic examination of swallowing respiratory coordination across the lifespan as a means of behaviorally investigating mechanisms of cortical modulation. Using time-locked recordings of submental surface electromyography, nasal airflow, and thyroid acoustics, three conditions of swallowing were evaluated in 20 adults in a single session and 10 infants in 10 sessions across the first year of life. The three swallowing conditions were selected to represent a continuum of volitional through nonvolitional swallowing control on the basis of a decreasing level of cortical activation. Our primary finding is that, across the lifespan, brainstem control strongly dictates the duration of swallowing apnea and is heavily involved in organizing the integration of swallowing and respiration, even in very early infancy. However, there is evidence that cortical modulation increases across the first 12 months of life to approximate more adult-like patterns of behavior. This modulation influences primarily conditions of volitional swallowing; sleep and naïve swallows appear to not be easily adapted by cortical regulation. Thus, it is attention, not arousal that engages cortical mechanisms.

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